Patent Publication Number: US-2022213885-A1

Title: System and method for managing liquid waste

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     This application claims the benefit the benefit under 35 U.S.C. § 119(e) of the filing date of provisional patent application Ser. No. 62/842,974 filed May 3, 2019, the disclosure of which is incorporated herein by reference. 
    
    
     FIELD OF THE DISCLOSURE 
     This disclosure relates to systems and methods for collecting and discarding liquid waste. 
     BACKGROUND 
     Certain instruments, such as diagnostic and clinical analyzers, perform processes in which liquid wastes are generated. Such liquid wastes must be managed—i.e., collected, temporarily stored, and then discarded—during and/or after operation of the instrument. Typically, such waste liquids are collected on the instrument in an on-board, liquid waste collection container (e.g., a bottle) and temporarily stored in the collection container. Such liquids may be collected from on-board sources, such as aspirators, drains, or the like. 
     Periodically, over the course of a sustained operation of the instrument, the liquid waste collection container must be emptied, or replaced with an empty collection container, as the container becomes filled with collected waste liquids. Typically, the liquid waste container is emptied by removing it from the instrument to empty the contents of the collection container or to replace the full container with an empty one. During the time that the liquid waste collection container is removed from the instrument, however, operation of the instrument must be suspended, as there is no container to collect liquid wastes. Having to suspend operation of the instrument each time a liquid waste collection container must be emptied or replaced can have a negative impact on the instrument&#39;s throughput. 
     SUMMARY 
     The following presents a simplified summary in order to provide a basic understanding of some aspects described herein. This summary is not an extensive overview of the claimed subject matter. It is intended to neither identify key or critical elements of the claimed subject matter nor delineate the scope thereof. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later. 
     Aspects of the disclosure are embodied in system for managing liquid waste. The system may include a first liquid container configured to receive liquid from a liquid source, a liquid transfer pump fluidly connected to the first liquid container, and a second liquid container fluidly connectable to the liquid transfer pump. The liquid transfer pump is configured to be selectively activated to transfer liquid from the first liquid container to the second liquid container when the second liquid container is fluidly connected to the liquid transfer pump. 
     According to other aspects, the system may further include a pressure differential source to which the first liquid container is connected to draw liquid into the first liquid container from the liquid source. 
     According to other aspects, the pressure differential source may include a vacuum pump. 
     According to other aspects, the system may further include a filter between the vacuum pump and the first liquid container. 
     According to other aspects, the filter may include a bleach fume filter. 
     According to other aspects, the system may further include a mounting block on which the filter and the first liquid container are mounted. 
     According to other aspects, the system may further include a filter loop fluidly connecting a top portion of the first liquid container to a bottom portion of the filter supported on the mounting block. 
     According to other aspects, the first liquid container may include an intermediate top wall, a first tower extending above the intermediate top wall, and a second tower extending above the intermediate top wall. The first tower includes a liquid inlet in the first tower for receiving liquid from the liquid source into the first liquid container, and the second tower includes a vacuum fitting in the second tower to which the vacuum pump is attached to draw liquid into the first liquid container from the liquid source. 
     According to other aspects, the liquid transfer pump may include a bellows pump. 
     According to other aspects, the system may further include a motor for operating the liquid transfer pump and a transmission coupling the motor to the liquid transfer pump. 
     According to other aspects, the system may further include a poppet valve associated with the second liquid container for controlling liquid flow into the second liquid container. 
     According to other aspects, the system may further include a float switch within the first liquid container, where the float switch is in communication with the liquid transfer pump to activate the liquid transfer pump when liquid within the first liquid container reaches a predefined level. 
     According to other aspects, the system may further include a connector fitting for fluidly connecting the second liquid container to the liquid transfer pump and a drip management system configured to draw liquid from the connector fitting into the first liquid container. 
     According to other aspects, the system may further include a connector fitting for fluidly connecting the second liquid container to the liquid transfer pump, a drip management system configured to draw liquid from the connector fitting into the first liquid container, and a vacuum pump to which the first liquid container is connected to draw liquid into the first liquid container from the liquid source. The connector fitting may include a female connector member and a male connector member received within the female connector member. The drip management system may include a connection port in communication with the female connector member, a fluid conduit connecting the connection port to the first liquid container, and a drip control valve, where the drip control valve is configured to permit fluid flow through the fluid conduit when the drip control valve is in an open configuration and to prevent fluid flow through the fluid conduit when the drip control valve is in a closed configuration. 
     According to other aspects, the drip control valve is a solenoid valve. 
     According to other aspects, the drip control valve is configured and controlled to be to be in the open configuration after the liquid transfer pump is deactivated following a transfer of liquid from the first liquid container to the second liquid container. 
     According to other aspects, the drip control valve is configured and controlled to be to be in the open configuration for a prescribed period of time after the liquid transfer pump is deactivated following the of transfer liquid from the first liquid container to the second liquid container and to be in the closed configuration all other times. 
     According to other aspects, the second liquid container includes a main body, a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall, and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf for fluidly connecting the second liquid container to the liquid transfer pump. 
     According to other aspects, the system may further include a connector interface fluidly connected to the liquid transfer pump and including an upwardly facing liquid connector fitting configured to be operably coupled to the downwardly extending liquid transfer connector fitting of the second liquid container to fluidly connect the liquid transfer pump to the second liquid container. 
     According to other aspects, the system may further include a liquid tray formed in the connector interface and surrounding the upwardly facing liquid connector fitting of the connector interface. 
     According to other aspects, the system may further include a drip management system configured to draw liquid from the liquid tray to the first liquid container or from the operably coupled liquid transfer connector fittings of the connector interface and the second liquid container to the first liquid container. 
     According to other aspects, the drip management system may include a connection port attached to the connector interface, a fluid conduit connecting the connection port to the first liquid container, and drip control valve. The drip control valve is configured to permit fluid flow through the fluid conduit when the drip control valve is in an open configuration and to prevent fluid flow through the fluid conduit when the drip control valve is in a closed configuration. 
     According to other aspects, the drip control valve is a solenoid valve. 
     According to other aspects, the drip control valve is configured and controlled to be to be in the open configuration when the liquid transfer pump is deactivated following a transfer liquid from the first liquid container to the second liquid container. 
     According to other aspects, the drip control valve is configured and controlled to be to be in the open configuration for a prescribed period of time after the liquid transfer pump is deactivated following the transfer liquid from the first liquid container to the second liquid container and to be in the closed configuration all other times. 
     According to other aspects, the system may further include a drain line connected to the second liquid container, and a drain pump fluidly connected to the drain line for transferring liquid from the second liquid container to a drain via the drain line. 
     According to other aspects, the system may further include a second float switch within the second liquid container, wherein the second float switch is in communication with the drain pump to activate the drain pump when liquid within the second liquid container reaches a predefined level. 
     According to other aspects, the system may further include a leak detection sensor. 
     According to other aspects, the first and second liquid containers and the liquid transfer pump are supported in a drawer of an instrument, and the drawer is configured to be laterally movable between an open position providing access to one or more of the first and second liquid containers and the liquid transfer pump and a closed position concealing the first and second liquid containers and the liquid transfer pump. 
     According to other aspects, the connector interface is affixed to the drawer. 
     According to other aspects, the first liquid container comprises an intermediate top wall, a liquid inlet tower extending above the intermediate top wall, a liquid inlet fluidly connected to the liquid inlet tower at a position above the intermediate top wall and through which the first liquid container receives liquid from the liquid source, and a vacuum tower extending above the intermediate top wall, and the pressure differential source is connected to the vacuum tower at a position above the intermediate top wall. 
     Further aspects of the disclosure are embodied in a method for managing liquid waste, the method comprising a) receiving liquid from a liquid source into a first liquid container, b) monitoring the amount of liquid in the first liquid container, c) connecting a second liquid container to a liquid transfer pump that is connected to the first liquid container by lowering a first connector fitting of the second liquid container into connective engagement with a second connector fitting coupled to an outlet of the liquid transfer pump, d) after the amount of liquid received into the first liquid container reaches a predefined level, as determined in step b), transferring liquid from the first liquid container into the second liquid container with the liquid transfer pump, and e) removing liquid transferred to the second liquid container during step d). 
     According to other aspects, step e) comprises transferring liquid from the second liquid container to a drain with a drain pump fluidly connected to the second liquid container. 
     According to other aspects, step e) further comprises monitoring a liquid level within the second liquid container with a second float switch, generating a pump activation signal when the second float switch detects that the amount of liquid within the second liquid container reaches a predefined level, and transmitting the pump activation signal to the drain pump to activate the drain pump and transfer liquid from the second liquid container to the drain. 
     According to other aspects, the method may further include, prior to step e), deactivating the liquid transfer pump. 
     According to other aspects, step e) comprises pouring liquid from the second liquid container through an opening in the second liquid container. 
     According to other aspects, steps a) and e) occur simultaneously. 
     According to other aspects, the first and second liquid containers and the liquid transfer pump are supported in a drawer of an instrument. The drawer is configured to be laterally movable between an open position providing access to one or more of the first and second liquid containers and the liquid transfer pump and a closed position concealing the first and second liquid containers and the liquid transfer pump, and step e) further comprises laterally moving the drawer to the open position and removing the second liquid container from the drawer after deactivating liquid transfer pump. 
     According to other aspects, the first connector fitting may include a male fitting extending downwardly from the second liquid container, and the second connector fitting comprises an upwardly facing female fitting and configured to receive the male fitting. 
     According to other aspects, step b) comprises monitoring a liquid level within the first liquid container with a float switch, step c) comprises generating a pump activation signal when the float switch detects that the amount of liquid within the first liquid container reaches the predefined level, and transmitting the pump activation signal to the liquid transfer pump to activate the liquid transfer pump and transfer liquid from the first liquid container to the second liquid container. 
     According to other aspects, the method may further include, after step d) and before step e), drawing liquid from the connection between the first connector fitting and the second connector fitting into the first liquid container. 
     Further aspects of the disclosure are embodied in a liquid container system comprising a liquid container that includes an intermediate top wall, a liquid inlet tower extending above the intermediate top wall, a liquid inlet fluidly connected to the liquid inlet tower at a position above the intermediate top wall and through which the liquid container receives liquid from a liquid source, and a vacuum tower extending above the intermediate top wall and to which a pressure differential source can be fluidly connected at a position above the intermediate top wall to draw liquid into the liquid container through the liquid inlet. 
     According to other aspects, the liquid container system may further include a filter in fluid communication with the vacuum tower of the liquid container. 
     According to other aspects, the liquid container system may further include a mounting block on which the filter and the liquid container are mounted. 
     According to other aspects, the liquid container system may further include a filter loop fluidly connecting the vacuum tower of the liquid container to a bottom portion of the filter supported on the mounting block. 
     According to other aspects, the liquid container system may further include a liquid level sensor configured to detect a liquid level within the liquid container. 
     According to other aspects, the liquid level sensor may include a float switch extending into an interior of the liquid container from a float switch connector mounted to the intermediate top wall. 
     According to other aspects, the liquid container system may further include a transfer fitting mounted in the intermediate top wall with a tube extending from the transfer fitting into an interior of the liquid container. 
     According to other aspects, the liquid container system may further include a transfer line fitting mounted in the intermediate top wall with a tube extending from the transfer line fitting into an interior of the liquid container, a transfer pump fluidly connected to the transfer fitting, and a transfer container fluidly connected to the transfer pump. 
     According to other aspects, the liquid container system may further include a liquid level sensor configured to detect a liquid level within the liquid container, the liquid level sensor being in operative communication with the transfer pump to activate the transfer pump to transfer an amount of liquid from the liquid container to the transfer container when the liquid level sensor detects that the liquid level within the liquid container has reached a prescribed level. 
     According to other aspects, the liquid container system may further include a transfer container interface configured to releasably connect the transfer container to the transfer pump. 
     According to other aspects, the transfer container may include a main body, a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall, and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf and configured for fluidly connecting the transfer container to the liquid transfer pump. 
     According to other aspects, the liquid transfer connector fitting may include a nipple that extends downwardly from the horizontal portion of the connector shelf and a liquid channel extending through the liquid transfer connector fitting. 
     According to other aspects, the liquid container system may further include a transfer container interface configured to releasably connect the transfer container to the transfer pump, the transfer container interface including an upwardly facing receptor opening configured to receive the nipple of the liquid transfer connector fitting. 
     According to other aspects, the transfer container interface may include a liquid trough, and the receptor opening is disposed within the liquid trough. 
     According to other aspects, the liquid container system may further include one or more O-rings disposed on the nipple. 
     According to other aspects, the transfer container further includes a cap removably secured to an opening formed in the main body of the transfer container, wherein the opening is configured for emptying the contents of the transfer container after removing the cap. 
     According to other aspects, the transfer container may further include a handle secured to the main body. 
     Further aspects of the disclosure are embodied in a liquid container system comprising a transfer container for receiving liquid transferred to the transfer container by a liquid transfer pump. The transfer container may include a main body, a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall, and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf and configured for fluidly connecting the transfer container to the liquid transfer pump. 
     According to other aspects, the liquid transfer connector fitting may include a nipple that extends downwardly from the horizontal portion of the connector shelf and a liquid channel extending through the liquid transfer connector fitting. 
     According to other aspects, the liquid container system may further include a transfer container interface configured to releasably connect the transfer container to the transfer pump, the transfer container interface including an upwardly facing receptor opening configured to receive the nipple of the liquid transfer connector fitting. 
     According to other aspects, the transfer container interface includes a liquid trough, and the receptor opening is disposed within the liquid trough. 
     According to other aspects, the liquid container system may further include one or more O-rings disposed on the nipple. 
     According to other aspects, the transfer container further comprises a cap removably secured to an opening formed in the main body of the transfer container, and the opening is configured for emptying the contents of the transfer container after removing the cap. 
     According to other aspects, the transfer container further comprises a handle secured to the main body. 
     Other features and characteristics of the subject matter of this disclosure, as well as the methods of operation, functions of related elements of structure and the combination of parts, and economies of manufacture, will become more apparent upon consideration of the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals designate corresponding parts in the various figures. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated herein and form part of the specification, illustrate various embodiments of the subject matter of this disclosure. In the drawings, like reference numbers indicate identical or functionally similar elements. 
         FIG. 1  is a perspective view of an implementation of a liquid waste management system as disclose herein. 
         FIG. 2  is a front perspective view of a vacuum reservoir of the liquid waste management system. 
         FIG. 3  is a rear perspective view of the vacuum reservoir of the liquid waste management system. 
         FIG. 4  is a rear perspective view of the vacuum reservoir of the liquid waste management system, with a filter omitted from the figure. 
         FIG. 5  is a front perspective view of the vacuum reservoir fluidly connected to a liquid transfer pump of the liquid waste management system. 
         FIG. 5A  is a transverse front cross-section of the vacuum reservoir. 
         FIG. 6  is a perspective view of a transfer pump module of the liquid waste management system. 
         FIG. 7  is a side view of the transfer pump module. 
         FIG. 8  is a rear perspective view of the vacuum reservoir and a removable container interface of the liquid waste management system with the filter and a filter mounting block omitted from the figure. 
         FIG. 9  is a top perspective view of a removable transfer container of the liquid waste management system. 
         FIG. 10  is a partial perspective view of a portion of the transfer container. 
         FIG. 10A  is a side cross-sectional view of a liquid transfer connection between the transfer container and the removable container interface in the direction A-A in  FIG. 10 . 
         FIG. 10B  is a side cross-sectional view of the liquid transfer connection between the transfer container and the removable container interface in the direction B-B in  FIG. 10   
         FIG. 11  is a bottom perspective view of the transfer container. 
         FIG. 12A  is a side perspective view of a poppet valve within the transfer container shown in a closed position. 
         FIG. 12B  is a side perspective view of a poppet valve within the transfer container shown in an open position. 
         FIG. 13  is a schematic, block diagram of an embodiment of the liquid waste management system. 
         FIG. 14  is a perspective view of an exemplary processing instrument in which the liquid waste management system may be incorporated. 
         FIG. 15  is a perspective view of a drawer of the exemplary processing instrument in which the liquid waste management system may be supported. 
         FIG. 16  is a perspective view of the transfer container showing a liquid level sensor located within the interior of the container. 
         FIG. 17  is a side view of the transfer container showing a liquid level sensor located within the interior of the container. 
         FIG. 18  is a perspective view of the liquid level sensor. 
     
    
    
     DETAILED DESCRIPTION 
     While aspects of the subject matter of the present disclosure may be embodied in a variety of forms, the following description and accompanying drawings are merely intended to disclose some of these forms as specific examples of the subject matter. Accordingly, the subject matter of this disclosure is not intended to be limited to the forms or embodiments so described and illustrated. 
     Unless defined otherwise, all terms of art, notations and other technical terms or terminology used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this disclosure belongs. All patents, applications, published applications and other publications referred to herein are incorporated by reference in their entirety. If a definition set forth in this section is contrary to or otherwise inconsistent with a definition set forth in the patents, applications, published applications, and other publications that are herein incorporated by reference, the definition set forth in this section prevails over the definition that is incorporated herein by reference. 
     Unless otherwise indicated or the context suggests otherwise, as used herein, “a” or “an” means “at least one” or “one or more.” 
     This description may use relative spatial and/or orientation terms in describing the position and/or orientation of a component, apparatus, location, feature, or a portion thereof. Unless specifically stated, or otherwise dictated by the context of the description, such terms, including, without limitation, top, bottom, above, below, over, under, on top of, upper, lower, left of, right of, in front of, behind, next to, adjacent, between, horizontal, vertical, diagonal, longitudinal, transverse, radial, axial, etc., are used for convenience in referring to such component, apparatus, location, feature, or a portion thereof in the drawings and are not intended to be limiting. 
     Furthermore, unless otherwise stated, any specific dimensions mentioned in this description are merely representative of an exemplary implementation of a device embodying aspects of the disclosure and are not intended to be limiting. 
     The use of the term “about” applies to all numeric values specified herein, whether or not explicitly indicated. This term generally refers to a range of numbers that one of ordinary skill in the art would consider as a reasonable amount of deviation to the recited numeric values (i.e., having the equivalent function or result) in the context of the present disclosure. For example, and not intended to be limiting, this term can be construed as including a deviation of ± 10  percent of the given numeric value provided such a deviation does not alter the end function or result of the value. Therefore, under some circumstances as would be appreciated by one of ordinary skill in the art a value of about 1% can be construed to be a range from 0.9% to 1.1%. 
     As used herein, the term “adjacent” refers to being near or adjoining. Adjacent objects can be spaced apart from one another or can be in actual or direct contact with one another. In some instances, adjacent objects can be coupled to one another or can be formed integrally with one another. 
     As used herein, the terms “substantially” and “substantial” refer to a considerable degree or extent. When used in conjunction with, for example, an event, circumstance, characteristic, or property, the terms can refer to instances in which the event, circumstance, characteristic, or property occurs precisely as well as instances in which the event, circumstance, characteristic, or property occurs to a close approximation, such as accounting for typical tolerance levels or variability of the embodiments described herein. 
     As used herein, the terms “optional” and “optionally” mean that the subsequently described, component, structure, element, feature, event, circumstance, characteristic, property, etc. may or may not be included or occur and that the description includes instances where the component, structure, element, feature, event, circumstance, characteristic, property, etc. is included or occurs and instances in which it is not or does not. 
     The terms “fluid communication,” “fluid connection,” “fluidly connected,” and similar terms mean either direct fluid communication or connection, for example, two regions can be in fluid communication with each other via an unobstructed fluid passageway capable of fluid transmission (e.g., channel, conduit, pipe, tube, hose, etc.) connecting the two regions or can be capable of being in fluid communication or connection, for example, two regions can be capable of fluid communication with each other when they are connected via a fluid passageway capable of fluid transmission that may include a valve disposed therein, wherein fluid communication can be established between the two regions upon actuating the valve. Fluid communication or connection between two regions is not limited to a condition of actual fluid flow between the two regions. 
     The term “line” when used in reference to a component for transmitting a liquid from one component or location to another component or location that is spatially distinct from the first component or location means any component so capable of such transmission, including, for example, a rigid or flexible conduit, channel, pipe, tube, hose, or combination of two or more thereof. 
     A liquid waste management system as disclosed herein is indicated by reference number  100  in  FIG. 1  and  FIG. 13 .  FIG. 13  represents a schematic, generalized block diagram illustrating various components of the system  100 , and  FIG. 1  illustrates a particular implementation of the system  100 . 
     In various embodiments, system  100  includes a vacuum reservoir  110  (a first liquid container that is typically not removed or is not readily removable from the system  100 ) and a removable transfer container  140  (a second liquid container that may be removable from the system  100 ). Vacuum reservoir  110  and transfer container  140  may each be a rotomolded bottle manufactured from low-density polyethylene (LDPE). System  100  further includes a transfer pump module  200  including a pump (described in more detail below) that transfers liquid from vacuum reservoir  110  to transfer container  140  via a transfer line  204  (e.g., PVC tubing). Vacuum reservoir  110  is connected in line with a vacuum, or other pressure differential, via a vacuum line  180  and a vacuum filter loop (line)  116  through a filter  128  (see  FIG. 3 ). Waste liquid is drawn into vacuum reservoir  110  from a waste liquid source  276  through a liquid waste inlet line  182  (e.g., PVC tubing) connected to vacuum reservoir  110 . 
     As shown in  FIGS. 14 and 15 , and still referring to  FIG. 1 , components of the system  100 , such as vacuum reservoir  110 , transfer container  140 , and transfer pump module  200  may be supported on a shelf or a movable drawer  302  of a processing instrument  300 . In  FIG. 15 , a front panel with a handle on a front wall of the drawer is omitted from the drawing. Processing instrument  300  may be a chemical or biological analyzer, such as a molecular analyzer for performing nucleic acid-based amplification reactions. Exemplary processing instruments in which system  100  may be incorporated include analyzers described in U.S. Pat. Nos. 8,731,712 and 9,732,374 and International Publication No. WO 2019/014239 A1, as well as the Panther® and Panther Fusion® systems available from Hologic, Inc. (Marlborough, Mass.). In an embodiment, as liquid is transferred from vacuum reservoir  110  to transfer container  140 , transfer container  140  can be periodically removed from the system  100  to be emptied, without disconnecting vacuum reservoir  110  from either the vacuum line  180  or the liquid waste inlet line  182 . Accordingly, while transfer container  140  is removed from the system  100  to be emptied, vacuum reservoir  110  can continuously receive liquid waste via the liquid waste inlet line  182 , and operation of the processing instrument  300  need not be interrupted. 
     As shown in  FIGS. 1, 13, and 14 , system  100  may optionally include a drain line  184  connected to transfer container  140  and coupled to a pump  262  for periodically drawing liquid from transfer container  140  to a drain  260  or bulk storage container, so as to reduce or eliminate the need to remove transfer container  140  for emptying. 
     Vacuum reservoir  110  may be configured with a non-uniform top surface. As shown in  FIG. 2 , for example, in various embodiments, vacuum reservoir  110  includes an intermediate top wall  122  with a liquid inlet tower (or first tower)  120  and a vacuum tower (or second tower)  124  extending above the intermediate top wall  122 . Liquid waste inlet line  182  is connected to the liquid inlet tower  120  at a waste inlet fitting  112  (see  FIGS. 3 and 4 ). Waste inlet fitting  112  may comprise a right angle, barbed fitting with NPT (National Pipe Thread taper) threads. Waste inlet fitting  112  is preferably formed from a bleach compatible material, such as PP, PVDF, etc. Alternatively, waste inlet fitting  112  may be a quick connect fitting. Vacuum filter loop  116  is connected to vacuum tower  124  at a vacuum fitting  114  and extends into a filter mounting block  126 , which supports filter  128  (see  FIG. 3 ) nestled against a concave wall  138  (see  FIGS. 4 and 8 ) formed on one side of vacuum reservoir  110 . One end of filter  128  is in fluid communication with vacuum filter loop  116  through filter mounting block  126 , and vacuum line  180  is connected to an opposite end of filter  128  at a filter outlet fitting  130 . Vacuum filter loop  116  comprises tubing (e.g., PVC) that pulls air through the top of the vacuum reservoir  110 . To pull vacuum through the vacuum reservoir  110  without liquid getting into vacuum line  180 , vacuum loop  116  is connected to vacuum reservoir  110  at vacuum tower  124  to prevent fluid from entering filter loop  116 . Vacuum fitting  114  may comprise a right angle, barbed fitting with NPT (National Pipe Thread taper) threads. Vacuum fitting  114  is preferably formed from a bleach compatible material, such as PP, PVDF, etc. Alternatively, vacuum fitting  114  may be a quick connect fitting. 
     Filter  128  has a specific orientation that requires flow to enter from a bottom side inlet at the filter mounting block  126 . In an embodiment, filter mounting block  126  is a machined PVC block that is mounted to the bottom of the waste drawer  302 . Filter mounting block  126  provides an airflow path from the vacuum fitting  114  connected to vacuum reservoir  110  to the filter  128 . Mounting block  126  provides a mating surface to incorporate filter  128  into system  100 . In an embodiment, filter  128  has an inlet and an outlet, and both sides have a male connection to fit a quick disconnect fitting. Mounting block  126  preferably interfaces with filter  128  to create an airtight seal between block  126  and filter  128 , and filter  128  can be installed/removed by connecting/disconnecting filter outlet fitting  130 . Filter  128  can be pulled upward and will disconnect from the mounting block  126 . In an embodiment, filter  128  comprises a bleach fume filter. In an embodiment, filter  128  is a capsule with male fitting connections at both ends, such as connections available from CPC, St. Paul, Minn. A bottom portion of the capsule houses a chemical media in pellet form that filters out the smell of bleach from the exhaust. A top portion of the capsule houses a 0.2 μm PTFE filter. 
     The vacuum tower  124  includes a threaded opening  136  at its upper surface configured to receive a mating threaded cap (not shown). Opening  136  is a service opening that allows a field service engineer (FSE) to see into the vacuum reservoir when troubleshooting. The FSE could pour liquid (water or endozime, etc.) to flush out the reservoir or test that the liquid level sensor float is working properly. 
     A vacuum from a vacuum source, such as a vacuum pump, is applied to vacuum reservoir  110  at the vacuum tower  124  by vacuum line  180  through the filter  128 , filter mounting block  126 , and vacuum filter loop  116 . Thus, liquid waste from a liquid waste source is drawn through the liquid waste inlet line  182  into vacuum reservoir  110  at the liquid inlet tower  120 . Liquid inlet tower  120  and the vacuum tower  124  disposed above the intermediate top wall  122  aid in limiting or preventing foam being sucked through the vacuum from vacuum reservoir  110 . 
     A float switch connector  132  (see  FIGS. 2, 5, 5A, and 8 ) mounted to the intermediate top wall  122  connects to a float switch  134  (continuous liquid level sensor) extending below the intermediate top wall  122  into the interior of vacuum reservoir  110 . 
     As shown in  FIG. 5 , the transfer pump module  200  is connected to vacuum reservoir  110  by transfer line  204  (e.g., PVC tubing). Referring to  FIGS. 5, 6, and 7 , transfer pump module  200  includes a transfer pump  202 , which may comprise a bellows pump (e.g., available from GRI Pumps, Bellville, Ohio), powered by a pump motor  210  with a pump transmission  212  coupling output of the pump motor  210  to the transfer pump  202 . The transfer pump  202  includes a pump inlet port  208  and a pump outlet port  206 . Liquid transfer line  204  is connected to transfer pump  202  at pump inlet port  208  and is connected to vacuum reservoir  110  at a transfer fitting  118  mounted in the intermediate top wall  122 . In various embodiments, a tube (or straw)  119  (See  FIG. 5A ) extends into vacuum reservoir  110  below the intermediate top wall  122  from the transfer fitting  118 . Tube, or straw,  119  may be formed from PVC. A pump outlet line  218  is connected at one end thereof to the pump outlet port  206 . 
     The transfer pump module  200  may further include a leak detection sensor  214 . Leak detection sensor  214  may comprise a foil with a serpentine conductor made from silicon and stainless steel that short circuits when exposed to liquid. A printed circuit board  216  may be provided with power and logic elements for controlling the liquid waste management system  100 . 
     Referring to  FIGS. 6 and 7 , the transfer pump module  200  further includes a transfer container interface  230  releasably connecting transfer container  140  to transfer pump  202 . As shown in  FIGS. 6 and 7 , transfer container interface  230  is mounted above the transfer pump  202 . In an embodiment, transfer container interface  230  is affixed to the drawer  302 . Pump outlet line  218  is connected to interface  230  at fitting  240  (see also  FIGS. 10A, 10B ). 
     As shown in  FIGS. 9 and 11 , transfer container  140  includes a main body  158  with a cap  144  that can be removed from an opening of the container for emptying the transfer container  140 . Transfer container  140  may further include a handle  146 . Transfer container  140  can be manually emptied by lifting transfer container  140  with handle  146  out of the shelf or drawer (e.g., drawer  302 ) on which the liquid waste management system  100  is supported, and the cap  144  can be removed to permit the transfer container  140  to be emptied. As noted, drain line  184  may be optionally connected to transfer container  140  at a fitting  142  on top of the transfer container  140  (see  FIG. 1 ) with a straw (not shown) extending from the fitting  142  into the interior of the transfer container  140 . 
     Transfer container  140  may further include a connector shelf  148  extending laterally from main body  158 . Connector shelf  148  includes a horizontal portion  150 , sidewalls  152 ,  154 , and a male transfer inlet fitting  234  extending downwardly from a bottom wall of horizontal portion  150 . Sidewalls  152 ,  154  and the horizontal portion  150  define an open recess  156  that, as shown in  FIG. 10 , receives transfer container interface  230 . As shown in  FIGS. 10, 10A, 10B , the male transfer inlet fitting  234  extends into a conforming female receptor  246  disposed within a liquid trough  242  formed in the top of removable container interface  230 , thereby fluidly connecting transfer container  140  to the liquid transfer pump  202 . Thus, liquid transfer pump  202  can pump liquid from vacuum reservoir  110  via the transfer line  204  and into transfer container  140 . 
     As shown in  FIG. 11 , transfer container  140  may further include a recess  168  formed in a bottom surface  166  of body  158  and an angled slot  167  extending from the bottom surface  166  partially up a side wall  169  beneath the connector shelf  148  . Recess  168  is a hand-hold location when the user is pouring liquid out of the transfer container  140 . Slot  167  is a ramp for a mechanical presence sensor (not shown), which has a retractable rod that, when depressed, indicates the presence of transfer container  140 . Ramp  168  aided in seating the bottle into the drawer properly and gradually depressing the mechanical switch. 
     As an alternative to a mechanical switch, a reed switch a with magnet for a presence sensor. Referring to  FIG. 11 , a magnet  155  may be mounted within an exterior surface of the transfer container  140  surrounding open recess  156 . In an embodiment, a magnetic proximity sensor, such as sensor  243  mounted in transfer container interface  230  (see  FIG. 8 ), detects the magnet  155  when the transfer container  140  is in its operatively position with respect to the transfer container interface  230  and pump module  200  (as shown in  FIG. 1 ). 
     Referring to  FIGS. 12A and 12B , transfer container  140  may include a poppet valve  160  disposed within an intake port  164  of a container wall  162  within the horizontal portion  150  of connector shelf  148  or disposed within the transfer inlet fitting  234 . Poppet valve  160  is configured to move from a closed position shown in  FIG. 12A , when the transfer pump  202  is not pumping liquid from vacuum reservoir  110 , to an open position shown in  FIG. 12B , when the transfer pump  202  is pumping liquid. Thus, a pressure differential caused by the transfer pump  202  opens the poppet valve  160  to permit liquid to be pumped into transfer container  140 , and the poppet valve  160  closes in the absence of a pressure differential to prevent liquid from escaping the transfer container  140 . 
     Transfer container  140  may further include a liquid level sensor for detecting a liquid level within the container  140  and provide a signal indicating that the container should be emptied or should be emptied soon. An exemplary liquid level sensor that may be incorporated into the transfer container  140  is indicated by reference number  266  in  FIGS. 16, 17, 18 . Liquid level sensor  266  includes a sensor bracket  280 , which may be secured to a wall of the transfer container  140  by screws or rivets  281  and  283 . Liquid level sensor  266  further includes a lower float  282  and an upper float  288 . Lower float  282  is pivotably mounted to the sensor bracket  280  by a pin  286  and includes a magnet  284  mounted within a face of the float  282 . Similarly, upper float  288  is pivotably mounted to the sensor bracket  280  by a pin  292  and includes a magnet  290  mounted within a face of the float  288 . 
     When there is little or no liquid within the transfer container  140 , the lower float  282  will hang in a downward position as shown in  FIGS. 16-18 , thereby presenting the magnet  284  in an outwardly facing orientation toward a wall of the transfer container  140 . The outwardly facing magnet  284  will be detected by a lower magnetic proximity sensor  304  mounted in a front wall of the drawer  302 , as shown in  FIG. 15 . Thus, a positive signal from the lower proximity sensor  304  indicating detection of the magnet  284  will indicate that the transfer container  140  is empty or nearly empty. As liquid begins to fill the transfer container  140 , buoyancy of the float  282  will cause the float  282  to rotate about the pin  286 , thereby moving the magnet  284  from the outwardly facing orientation. Thus, the magnet will no longer be detected by the lower proximity sensor  304 , thereby indicating that liquid is being transferred into the transfer container  140 . 
     When the liquid level within the transfer container  140  reaches the upper float  288 , buoyancy of the float  288  will cause the float  288  to rotate upwardly about the pin  292  to the position shown in  FIGS. 16-18 , thereby presenting the magnet  290  in an outwardly facing orientation toward a wall of the transfer container  140 . The outwardly facing magnet  290  will be detected by an upper magnetic proximity sensor  306  mounted in a front wall of the drawer  302 , as shown in  FIG. 15 . Thus, a positive signal from the upper magnetic proximity sensor  306  indicating detection of the magnet  290  will indicate that the liquid within transfer container  140  is at or near a level at which the transfer container  140  should be emptied. An alarm (e.g., visual and/or audible) may signal an operator to empty the container  140 . Alternatively, a positive signal from upper magnetic proximity sensor  306  may activate a drain pump (described below) to remove liquid from the container  140 . 
     Until the liquid within transfer container  140  reaches the upper float  288 , the float  288  will hang downwardly, thereby positioning the magnet  290  away from the outwardly facing orientation. Thus, the magnet will not be detected by the upper proximity sensor  306 . 
       FIGS. 10A and 10B  show features of a connection between transfer container  140  and transfer container interface  230 . Male transfer inlet fitting  234  (also referred to herein as liquid transfer connector fitting) includes a nipple  235  that extends downwardly from horizontal portion  150  of the connector shelf  148  into the female receptor opening  246  formed in the container interface  230  and a liquid channel  237  extending through the fitting  234 . One or more O-rings  248  may be provided between an exterior surface of nipple  235  and an interior surface of the female receptor opening  246 . O-rings  248  are preferably formed from a bleach compatible material, such as EPDM or Viton®. A flow channel  241  extends from the bottom of the receptor opening  246  through the fitting  240 . As shown in  FIGS. 16-18 , a tube  239  extends from the transfer inlet fitting  234  into the interior of the transfer container  140  and may extend through the handle  146  to a clip  294  on the sensor bracket  280 . Drip channels  250 ,  252  extend from the bottom of the receptor opening  246  to a drip control valve  232  connected to a drip line connector fitting  244 . Drip line connector fitting  244  may comprise a right angle, barbed fitting with NPT (National Pipe Thread taper) threads and is preferably formed from a bleach compatible material, such as PP, PVDF, etc. Referring to  FIG. 8 , a drip line  238  (e.g., PVC tubing) is connected to drip line connector fitting  244  of transfer container interface  230  and extends to a drip line fitting  256  disposed in the liquid inlet tower  120  of vacuum reservoir  110 . Drip line fitting  256  may comprise a right angle, barbed fitting with NPT (National Pipe Thread taper) threads and is preferably formed from a bleach compatible material, such as PP, PVDF, etc. Drip control valve  232 , which may be a solenoid valve, controls flow through drip line  238 . Drip control valve  232  opens while and/or after liquid is pumped by transfer pump  202  into transfer container  140 . In an embodiment, drip control valve  232  is configured and controlled to be in the open configuration after the liquid transfer pump  202  has been deactivated and before the transfer container  140  is removed from system  100  for liquid waste disposal. In an embodiment, drip control valve  232  is only open for a prescribed period of time (e.g., a few seconds (2-10 seconds)) and draws liquid from (i) the interface between exterior surface of nipple  235  and interior surface of the female receptor opening  246  (for example, from a gap  247  between nipple  235  and female receptor opening  246  (see  FIG. 10A )), and (ii) the liquid channel  237  extending through male transfer inlet fitting  234 . In another embodiment, drawer  302  is locked during operation of the instrument and can be unlocked, for example using a touch screen (e.g., a waste management screen) of an instrument control computer. When an operator has requested that the drawer  302  be unlocked, but before the instrument unlocks the drawer  302 , drip control valve  232  may open for a brief period, e.g., 2-10 seconds, to remove liquid from male transfer inlet fitting  234  before the transfer bottle  140  is removed from the drawer  302 . Drip line  238 , connected to drip control valve  232 , connects to vacuum reservoir  110  under vacuum. When drip control valve  232  is open, any remaining liquid on the surface of or inside female receptor opening  246  or liquid trough  242  is pulled under vacuum back into vacuum reservoir  110  through drip line  238 . 
     Operation of the liquid waste management system  100  and the interrelationship of various components are illustrated in  FIG. 13 . Vacuum reservoir  110  is connected to a pressure differential source, such as a vacuum pump  274 , that draws air from the vacuum tower  124  of vacuum reservoir  110  through the vacuum filter loop  116 , filter  128 , and vacuum line  180 . Liquid waste is drawn from a liquid waste source, such as one or more aspirators  276 , through liquid waste inlet line  182  into liquid inlet tower  120  of vacuum reservoir  110 . 
     Liquid level within vacuum reservoir  110  is monitored via float switch  134 , which is in direct or indirect (e.g., through a system controller), wired or wireless, communication with transfer pump  202 , as represented by a transfer pump signal communication path  270 . When liquid within vacuum reservoir  110  reaches a predefined level, as determined by float switch  134 , an activation signal is transmitted to the transfer pump  202 . In an embodiment, float switch  134  communicates liquid level height within the vacuum reservoir  110  as a fraction or percentage of a maximum height. When the height percentage exceeds a threshold defined by software that controls operation of the liquid waste management system  100 , a command is sent to the transfer pump  202  to turn on. 
     Other means may be used to monitor the amount of liquid in the vacuum reservoir  110 , such as a scale (not shown) measuring the weight of the vacuum reservoir  110  and its contents or a contact switch (not shown) mounted to an interior surface of the vacuum reservoir  110  that is activated when contacted by liquid within the vacuum reservoir  110 . 
     Transfer pump  202  is then activated to transfer liquid from vacuum reservoir  110  via the liquid transfer line  204  and the pump outlet line  218  to transfer container  140  that is connected to the pump outlet line  218  via the transfer inlet fitting  234  disposed on the horizontal portion  150  of connector shelf  148 . Transfer pump  202  may be activated for a prescribed period of time, until all liquid is removed from the vacuum reservoir  110  (i.e., when the liquid height percentage drops to 0%), as determined by float switch  134 , scale, or interior contact switch, or until a prescribed amount of liquid is removed from the vacuum reservoir  110 , as determined by float switch  134 , scale, or interior contact switch or by a flow meter (not shown). 
     Drip control valve  232  is in direct or indirect, wired or wireless, communication with transfer pump  202 , as represented by drip valve signal communication path  272 , so that as the transfer pump  202  is pumping liquid into transfer container  140  (and/or shortly thereafter), valve  232  is opened, thereby drawing liquid under vacuum through the drip line  238  from the transfer inlet fitting  234 , female receptor  246 , and/or liquid trough  242  and into the vacuum reservoir  110 . 
     Transfer container  140  can be manually emptied, as described above. Alternatively, drain pump  262  (e.g., a bellows pump available from GRI Pumps, Bellville, Ohio), may be provided connecting transfer container  140  to a drain  260  via drain line  184 . Liquid level within transfer container  140  may be monitored via liquid level sensor  266  within transfer container  140 . Liquid level sensor  266  may be in direct or indirect (e.g., through a system controller) communication, wired or wireless, with drain pump  262 , as represented by a drain pump signal communication path  268 . When liquid within transfer container  140  reaches a predefined level, as determined by liquid level sensor  266 , an activation signal is transmitted to the drain pump  262 . Other means may be used to monitor the amount of liquid in the transfer container  140 , such as a scale (not shown) measuring the weight of the transfer container  140  and its contents or a contact switch (not shown) mounted to an interior surface of the transfer container  140  that is activated when contacted by liquid within the transfer container  140 . 
     Drain pump  262  is then activated to draw liquid from transfer container  140  to drain  260  via drain line  184 . Drain pump  262  may be activated for a prescribed period of time, until all liquid is removed from the transfer container  140 , as determined by liquid level sensor  266 , scale, or interior contact switch, or until a prescribed amount of liquid is removed from the transfer container  140 , as determined by liquid level sensor  266 , scale, or interior contact switch or by a flow meter (not shown). 
     Liquid waste management system  100  may include an indicator, such as, an alarm, warning light, audio and/or visual message generator, or the like, coupled to the liquid level sensor  266  to indicate that the amount of liquid in the transfer container  140  has reached or exceeded a predefined threshold. In certain embodiments, the instrument ceases processing samples once a predefined threshold has been reached. An advance warning may be provided to avoid having to stop the processing of samples. 
     Control System 
     Liquid waste management system  100  may include a controller  500 , which monitors, communicates with, and/or controls components of system  100 , including one or more of the transfer pump  202 , the drip control valve  232 , float switch  134 , liquid level sensor  266  (which includes proximity sensors  304 ,  306 ), drain pump  262 , proximity sensors  243 , and vacuum pump  274 . Controller  500  may be in wired or wireless communication with each of the components monitored and/or controlled by controller  500 . To avoid obscuring the drawing, communication lines between controller  500  and components of the system  100  are not shown in  FIG. 13 . 
     Controller  500  may comprise a computer system for executing software (which may include firmware) that effects operation, control, and monitoring of the liquid waste management system  100 . Controller  500  may be implemented via one or more logic elements, e.g., a computer, embedded controller, programmable gate array, application specific integrated circuit, programmable logic device, etc., and may include or access data storage memory, which may include random access memory (RAM), read only memory (ROM), flash memory, and other types of memory now known or later developed. Controller  500  may also include additional memory, including, for example, a hard disk drive and/or a removable storage drive, representing a magnetic tape drive, an optical disk drive, USB slot, memory card interface, internet memory, cloud-based memory, or any storage medium or format now known or later developed. Memory devices and storage units used herein may comprise any storage medium for persistent and/or volatile storage of electronic data now known or later developed. Such data may be stored within the storage medium in a database, which may comprise any data structure and format now known or later developed, including, for example, a relational database, an object database, a flat file, list, and so on, or some combination thereof. 
     In alternative embodiments, some or all of the memory may include other similar means for allowing computer programs or other instructions to be loaded into a computer system. Such means can include, for example, a removable storage unit and an interface. Examples of such can include a memory stick and memory stick interface, a secure digital card and interface, and other portable media and interfaces which allow software and data to be transferred to controller  500 . 
     Software comprises instructions stored on non-transitory computer-readable media which, when executed by the logic element(s) of the controller  500 , cause the control and computing hardware to perform one or more automated or semi-automated processes. 
     The computer system of controller  500  may also include a communications interface, which allows information (e.g., power, control and feedback signals, software, data, etc.) to be transferred between controller  500  and external devices. Examples of communications interfaces can include a modem, a network interface (such as an Ethernet card), a communications port, a PCMCIA slot and card, a USB-port, a Firewire port, Bluetooth, or any interface now known or later developed. Information transferred via a communications interface is in the form of signals which can be electronic, electromagnetic, optical or other signals capable of being received by the communications interface. 
     The computer system of controller  500  can also include one or more input devices, such as a touch screen, stylus, keyboard, mouse or other pointing device, microphone (voice recognition), data scanners (e.g., barcode, RFID, etc.), and so on. Various output devices may also be included in the computer system, including indicator lights, a display, printer, tactile (e.g., vibratory) indicators, and audio speakers. 
     In this document, terms such as “computer program medium,” “computer-readable medium,” “computer usable medium,” and the like are used to generally refer to media, such as removable storage units, a hard disk installed in hard disk drive, and other non-transitory means for providing software and data to controller  500 . 
     Computer programs (also called computer control logic) are stored in one or more portions of memory that is part of or accessed by controller  500 . Computer programs can also be received via a communications interface. Such computer programs may include algorithms that, when executed, enable the computer system of controller  500  to control the operation of the liquid waste management system  100  in accordance with aspects disclosed herein. 
     In an embodiment in which aspects of the subject matter disclosed herein are implemented using software, the software may be stored in a computer program product and loaded into the computer system of controller  500  using a removable storage drive, a hard drive, an interface, and/or a communications interface. The control logic (software), when executed by the processor of the controller  500 , causes the processor to perform functional aspects of the subject matter as described herein via the systems, devices, apparatuses, sensors, encoder, etc. described above. An operating system may perform basic tasks such as recognizing input from an input device, sending output to an output device, managing files and system resources, and managing the various processes embodying computer programs running on the computer system. 
     Controller  500  may comprise a stand-alone system dedicated to the liquid waste management system  100 , or one or more components of controller  500 —e.g., processor, memory, interfaces, input/output devices, etc.—may be a shared part of a global controller that controls one or more components of an instrument or laboratory of which the liquid waste management system  100  is a component, in addition to the liquid waste management system  100 . 
     Embodiments 
     Embodiment 1. A system for managing liquid waste, the system comprising: a first liquid container configured to receive liquid from a liquid source; a liquid transfer pump fluidly connected to the first liquid container; and a second liquid container fluidly connectable to the liquid transfer pump, wherein the liquid transfer pump is configured to be selectively activated to transfer liquid from the first liquid container to the second liquid container when the second liquid container is fluidly connected to the liquid transfer pump. 
     Embodiment 2. The system of embodiment 1, further comprising a pressure differential source to which the first liquid container is connected to draw liquid into the first liquid container from the liquid source. 
     Embodiment 3. The system of embodiment 2, wherein the pressure differential source comprises a vacuum pump. 
     Embodiment 4. The system of embodiment 3, further comprising a filter between the vacuum pump and the first liquid container. 
     Embodiment 5. The system of embodiment 4, wherein the filter comprises a bleach fume filter. 
     Embodiment 6. The system of embodiment 4 or 5, further comprising a mounting block on which the filter and the first liquid container are mounted. 
     Embodiment 7. The system of embodiment 6, further comprising a filter loop fluidly connecting a top portion of the first liquid container to a bottom portion of the filter supported on the mounting block. 
     Embodiment 8. The system of any one of embodiments 3 to 7, wherein the first liquid container comprises: an intermediate top wall; a first tower extending above the intermediate top wall; and a second tower extending above the intermediate top wall; wherein the first tower includes a liquid inlet in the first tower for receiving liquid from the liquid source into the first liquid container, and wherein the second tower includes a vacuum fitting in the second tower to which the vacuum pump is attached to draw liquid into the first liquid container from the liquid source. 
     Embodiment 9. The system of any one of embodiments 1 to 8, wherein the liquid transfer pump comprises a bellows pump. 
     Embodiment 10. The system of any one of embodiments 1 to 9, further comprising a motor for operating the liquid transfer pump and a transmission coupling the motor to the liquid transfer pump. 
     Embodiment 11. The system of any one of embodiments 1 to 10, further comprising a poppet valve associated with the second liquid container for controlling liquid flow into the second liquid container. 
     Embodiment 12. The system of any one of embodiments 1 to 11, further comprising a float switch within the first liquid container, wherein the float switch is in communication with the liquid transfer pump to activate the liquid transfer pump when liquid within the first liquid container reaches a predefined level. 
     Embodiment 13. The system of any one of embodiments 1 to 12, further comprising a connector fitting for fluidly connecting the second liquid container to the liquid transfer pump and a drip management system configured to draw liquid from the connector fitting into the first liquid container. 
     Embodiment 14. The system of embodiment 1, further comprising: a connector fitting for fluidly connecting the second liquid container to the liquid transfer pump; a drip management system configured to draw liquid from the connector fitting into the first liquid container; and a vacuum pump to which the first liquid container is connected to draw liquid into the first liquid container from the liquid source, and wherein the connector fitting comprises a female connector member and a male connector member received within the female connector member, and wherein the drip management system comprises a connection port in communication with the female connector member, a fluid conduit connecting the connection port to the first liquid container, and a drip control valve, wherein the drip control valve is configured to permit fluid flow through the fluid conduit when the drip control valve is in an open configuration and to prevent fluid flow through the fluid conduit when the drip control valve is in a closed configuration. 
     Embodiment 15. The system of embodiment 14, wherein the drip control valve is a solenoid valve. 
     Embodiment 16. The system of embodiment 14 or 15, wherein the drip control valve is configured and controlled to be to be in the open configuration after the liquid transfer pump is deactivated following a transfer of liquid from the first liquid container to the second liquid container. 
     Embodiment 17. The system of embodiment 16, wherein the drip control valve is configured and controlled to be to be in the open configuration for a prescribed period of time after the liquid transfer pump is deactivated following the of transfer liquid from the first liquid container to the second liquid container and to be in the closed configuration all other times. 
     Embodiment 18. The system of any one of embodiments 1 to 12 wherein the second liquid container comprises: a main body; a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall; and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf for fluidly connecting the second liquid container to the liquid transfer pump. 
     Embodiment 19. The system of embodiment 18, further comprising a connector interface fluidly connected to the liquid transfer pump and including an upwardly facing liquid connector fitting configured to be operably coupled to the downwardly extending liquid transfer connector fitting of the second liquid container to fluidly connect the liquid transfer pump to the second liquid container. 
     Embodiment 20. The system of embodiment 19, further comprising a liquid tray formed in the connector interface and surrounding the upwardly facing liquid connector fitting of the connector interface. 
     Embodiment 21. The system of embodiment 20, further comprising a drip management system configured to draw liquid from the liquid tray to the first liquid container or from the operably coupled liquid transfer connector fittings of the connector interface and the second liquid container to the first liquid container. 
     Embodiment 22. The system of embodiment 21, wherein the drip management system comprises: a connection port attached to the connector interface; a fluid conduit connecting the connection port to the first liquid container; and a drip control valve, wherein the drip control valve is configured to permit fluid flow through the fluid conduit when the drip control valve is in an open configuration and to prevent fluid flow through the fluid conduit when the drip control valve is in a closed configuration. 
     Embodiment 23. The system of embodiment 22, wherein the drip control valve is a solenoid valve. 
     Embodiment 24. The system of embodiment 22 or 23, wherein the drip control valve is configured and controlled to be to be in the open configuration when the liquid transfer pump is deactivated following a transfer liquid from the first liquid container to the second liquid container. 
     Embodiment 25. The system of embodiment 24, wherein the drip control valve is configured and controlled to be to be in the open configuration for a prescribed period of time after the liquid transfer pump is deactivated following the transfer liquid from the first liquid container to the second liquid container and to be in the closed configuration all other times. 
     Embodiment 26. The system of any one of embodiments 1 to 21, further comprising: a drain line connected to the second liquid container; and a drain pump fluidly connected to the drain line for transferring liquid from the second liquid container to a drain via the drain line. 
     Embodiment 27. The system of embodiment 26, further comprising a second float switch within the second liquid container, wherein the second float switch is in communication with the drain pump to activate the drain pump when liquid within the second liquid container reaches a predefined level. 
     Embodiment 28. The system of any one of embodiments 1 to 27, further comprising a leak detection sensor. 
     Embodiment 29. The system of any one of embodiments 1 to 28, wherein the first and second liquid containers and the liquid transfer pump are supported in a drawer of an instrument, wherein the drawer is configured to be laterally movable between an open position providing access to one or more of the first and second liquid containers and the liquid transfer pump and a closed position concealing the first and second liquid containers and the liquid transfer pump. 
     Embodiment 30. The system of any one of embodiment 19 to 25, wherein the first and second liquid containers and the liquid transfer pump are supported in a drawer of an instrument, wherein the drawer is configured to be laterally movable between an open position providing access to one or more of the first and second liquid containers and the liquid transfer pump and a closed position concealing the first and second liquid containers and the liquid transfer pump, and wherein the connector interface is affixed to the drawer. 
     Embodiment 31. The system of any one of embodiments 2 to 7, wherein the first liquid container comprises: an intermediate top wall; a liquid inlet tower extending above the intermediate top wall; a liquid inlet fluidly connected to the liquid inlet tower at a position above the intermediate top wall and through which the first liquid container receives liquid from the liquid source; and a vacuum tower extending above the intermediate top wall, wherein the pressure differential source is connected to the vacuum tower at a position above the intermediate top wall. 
     Embodiment 32. A method for managing liquid waste, the method comprising: a) receiving liquid from a liquid source into a first liquid container; b) monitoring the amount of liquid in the first liquid container; c) connecting a second liquid container to a liquid transfer pump that is connected to the first liquid container by lowering a first connector fitting of the second liquid container into connective engagement with a second connector fitting coupled to an outlet of the liquid transfer pump; d) after the amount of liquid received into the first liquid container reaches a predefined level, as determined in step b), transferring liquid from the first liquid container into the second liquid container with the liquid transfer pump; and e) removing liquid transferred to the second liquid container during step d). 
     Embodiment 33. The method of embodiment 32, wherein step e) comprises transferring liquid from the second liquid container to a drain with a drain pump fluidly connected to the second liquid container. 
     Embodiment 34. The method of embodiment 33, wherein step e) further comprises monitoring a liquid level within the second liquid container with a second float switch, generating a pump activation signal when the second float switch detects that the amount of liquid within the second liquid container reaches a predefined level, and transmitting the pump activation signal to the drain pump to activate the drain pump and transfer liquid from the second liquid container to the drain. 
     Embodiment 35. The method of embodiment 32, further comprising, prior to step e), deactivating the liquid transfer pump. 
     Embodiment 36. The method of embodiment 35, wherein step e) comprises pouring liquid from the second liquid container through an opening in the second liquid container. 
     Embodiment 37. The method of embodiment 35 or 36, wherein steps a) and e) occur simultaneously. 
     Embodiment 38. The method of any one of embodiments 35 to 37, wherein the first and second liquid containers and the liquid transfer pump are supported in a drawer of an instrument, wherein the drawer is configured to be laterally movable between an open position providing access to one or more of the first and second liquid containers and the liquid transfer pump and a closed position concealing the first and second liquid containers and the liquid transfer pump, and wherein step e) further comprises laterally moving the drawer to the open position and removing the second liquid container from the drawer after deactivating liquid transfer pump. 
     Embodiment 39. The method of any one of embodiments 32 to 38, wherein the first connector fitting comprises a male fitting extending downwardly from the second liquid container, and the second connector fitting comprises an upwardly facing female fitting and configured to receive the male fitting. 
     Embodiment 40. The method of any one of embodiments 32 to 39, wherein: 
     step b) comprises monitoring a liquid level within the first liquid container with a float switch; and step c) comprises: generating a pump activation signal when the float switch detects that the amount of liquid within the first liquid container reaches the predefined level; and transmitting the pump activation signal to the liquid transfer pump to activate the liquid transfer pump and transfer liquid from the first liquid container to the second liquid container. 
     Embodiment 41. The method of any one of embodiments 32 to 40, further comprising, after step d) and before step e), drawing liquid from the connection between the first connector fitting and the second connector fitting into the first liquid container. 
     Embodiment 42. A liquid container system comprising a liquid container, wherein the liquid container comprises: an intermediate top wall; a liquid inlet tower extending above the intermediate top wall; a liquid inlet fluidly connected to the liquid inlet tower at a position above the intermediate top wall and through which the liquid container receives liquid from a liquid source; and a vacuum tower extending above the intermediate top wall and to which a pressure differential source can be fluidly connected at a position above the intermediate top wall to draw liquid into the liquid container through the liquid inlet. 
     Embodiment 43. The liquid container system of embodiment 42, further comprising a filter in fluid communication with the vacuum tower of the liquid container. 
     Embodiment 44. The liquid container system of embodiment 43, further comprising a mounting block on which the filter and the liquid container are mounted. 
     Embodiment 45. The liquid container system of embodiment 44, further comprising a filter loop fluidly connecting the vacuum tower of the liquid container to a bottom portion of the filter supported on the mounting block. 
     Embodiment 46. The liquid container system of any one of embodiments 42 to 45, further comprising a liquid level sensor configured to detect a liquid level within the liquid container. 
     Embodiment 47. The liquid container system of embodiment 46, wherein the liquid level sensor comprises a float switch extending into an interior of the liquid container from a float switch connector mounted to the intermediate top wall. 
     Embodiment 48. The liquid container system of any one of embodiments 42 to 47, further comprising a transfer fitting mounted in the intermediate top wall with a tube extending from the transfer fitting into an interior of the liquid container. 
     Embodiment 49. The liquid container system embodiment 42, further comprising: a transfer line fitting mounted in the intermediate top wall with a tube extending from the transfer line fitting into an interior of the liquid container; a transfer pump fluidly connected to the transfer fitting; and a transfer container fluidly connected to the transfer pump. 
     Embodiment 50. The liquid container system of embodiment 49, further comprising a liquid level sensor configured to detect a liquid level within the liquid container, the liquid level sensor being in operative communication with the transfer pump to activate the transfer pump to transfer an amount of liquid from the liquid container to the transfer container when the liquid level sensor detects that the liquid level within the liquid container has reached a prescribed level. 
     Embodiment 51 The liquid container system of embodiment 46 or 50, further comprising a transfer container interface configured to releasably connect the transfer container to the transfer pump. 
     Embodiment 52. The liquid container system of embodiment 49, wherein the transfer container comprises: a main body; a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall; and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf and configured for fluidly connecting the transfer container to the liquid transfer pump. 
     Embodiment 53. The liquid container system of embodiment 52, wherein the liquid transfer connector fitting comprises a nipple that extends downwardly from the horizontal portion of the connector shelf and a liquid channel extending through the liquid transfer connector fitting. 
     Embodiment 54. The liquid container system of embodiment 53, further comprising a transfer container interface configured to releasably connect the transfer container to the transfer pump, the transfer container interface including an upwardly facing receptor opening configured to receive the nipple of the liquid transfer connector fitting. 
     Embodiment 55. The liquid container system of embodiment 54, wherein the transfer container interface includes a liquid trough, and the receptor opening is disposed within the liquid trough. 
     Embodiment 56. The liquid container system of any one of embodiments 53 to 55, further comprising one or more O-rings disposed on the nipple. 
     Embodiment 57. The liquid container system of any one of embodiments 52 to 56, wherein the transfer container further comprises a cap removably secured to an opening formed in the main body of the transfer container, wherein the opening is configured for emptying the contents of the transfer container after removing the cap. 
     Embodiment 58. The liquid container system of any one of embodiments 52 to 57, wherein the transfer container further comprises a handle secured to the main body. 
     Embodiment 59. A liquid container system comprising a transfer container for receiving liquid transferred to the transfer container by a liquid transfer pump, wherein the transfer container comprises: a main body; a connector shelf extending laterally from the main body and including a horizontal portion and defining a bottom wall; and a liquid transfer connector fitting extending downwardly from the bottom wall of the horizontal portion of the connector shelf and configured for fluidly connecting the transfer container to the liquid transfer pump. 
     Embodiment 60. The liquid container system of embodiment 59, wherein the liquid transfer connector fitting comprises a nipple that extends downwardly from the horizontal portion of the connector shelf and a liquid channel extending through the liquid transfer connector fitting. 
     Embodiment 61. The liquid container system of embodiment 60, further comprising a transfer container interface configured to releasably connect the transfer container to the transfer pump, the transfer container interface including an upwardly facing receptor opening configured to receive the nipple of the liquid transfer connector fitting. 
     Embodiment 62. The liquid container system of embodiment 61, wherein the transfer container interface includes a liquid trough, and the receptor opening is disposed within the liquid trough. 
     Embodiment 63. The liquid container system of any one of embodiments 59 to 62, further comprising one or more O-rings disposed on the nipple. 
     Embodiment 64. The liquid container system of any one of embodiments 59 to 63, wherein the transfer container further comprises a cap removably secured to an opening formed in the main body of the transfer container, wherein the opening is configured for emptying the contents of the transfer container after removing the cap. 
     Embodiment 65. The liquid container system of any one of embodiments 59 to 64, wherein the transfer container further comprises a handle secured to the main body. 
     While the subject matter of this disclosure has been described and shown in considerable detail with reference to certain illustrative embodiments, including various combinations and sub-combinations of features, those skilled in the art will readily appreciate other embodiments and variations and modifications thereof as encompassed within the scope of the present disclosure. Moreover, the descriptions of such embodiments, combinations, and sub-combinations is not intended to convey that the claimed subject matter requires features or combinations of features other than those expressly recited in the claims. Accordingly, the scope of this disclosure is intended to include all modifications and variations encompassed within the spirit and scope of the following appended claims.