MEANS FOR PURIFICATION/FILTRATION OF HOUSEHOLD WASTE WATER AND THE LIKE

Abstract: Devices for a purification/filtration plant for household waste water (grey water). The water is introduced in a pipe (2) to a distribution container (3) at the top of a large filtration container (1), with a number of open filtering bags/sacks (6) standing on a plate (7) slightly above the bottom. From the distribution container (3) there pass flexible outlet pipes (4) at several levels. From the pipe (5) in the lowest position water is passed first to a first filtering bag (6). When this is filled, a sensor activates a lifting mechanism for the pipe (5) and swivels it up and out of operation. The pipe (6) at the next level takes over and fills the next filtering bag/sack. The filtered water is collected on the plate under the filtering bags/sacks and conveyed out towards the outer edges of the container, where it sinks through a circumferential hose (9) filled with a filtration medium and is collected on the bottom of the container where a pump transfers the water to the next stage in the purification process.

Description: Means for purification/filtration of household waste water and the like. Used water must be dealt with in some way in order to ensure that infectious substances are not passed into the natural environment, thus causing pollution of drinking water sources, rivers, lakes, etc. Until now towns and large country districts have been connected to central purification plants via pipelines. Such plants have been developed to receive water from approximately 2/3 of the country's houses, while approximately 1/3 have no connection to central purification plants and therefore have to find other solutions, since it is too expensive to provide long supply pipes to the central purification plants. This invention concerns a purification method, preferably for scattered housing, based on the fact that all household waste water (grey water) undergoes a special purification process, wherein solid and liquid materials are separated through filtering bags/sacks, which are changed at specific intervals, e.g. once or twice per year, according to the number of people residing in the house. It is stipulated that the thoroughly filtered/purified waste water (grey water) should be so pure that it can be subsequently re-used, e.g. as water for the water closet, garden watering or used in market gardens and for agricultural purposes. In order to be able to re-use the filtered water it must undergo a subsequent filtration and treatment with U.V. radiation, thus ensuring that the water is absolutely pure and sterile. This treatment will be described in another patent application for filtration-tank-purification of waste water. The purification of waste water is performed according to this invention by introducing the waste water from the household into a collecting pipe inside a distribution container which is located at the top of a large main container. From the distribution container there are outlet pipes at different levels, which convey the water to open filtering bags/sacks which stand on a bottom plate a short distance up from the bottom of the main container. The filtering bags/sacks can consist of one or more bags/sacks inserted into one another, and which may be of woven materials, e.g. jute and/or perforated bags/sacks of different types of artificial materials. In such cases where several layers are used, the outer bag sack must be of a larger diameter than the innermost one. Solid particles are retained inside the bags while liquids will pass through and be collected down in the bottom of the main container. From the distribution container the pipe in the lowest level will begin to fill one of several bags/sacks which stand extended in the main container. According to the invention it is very important that one bag/sack should be filled at a time, thus establishing good operating routines with regard to replacement of bags/sacks. According to the invention it is stipulated that when the first bag/sack has been filled to the desired level, a device attached to the flexible pipe from the distribution container should be activated and swivels the pipe upwards with the result that the water level in the distribution container rises up to the pipe at the next level and bag/sack no. 2 begins to be filled. When this too is full, the same procedure will be repeated, and this pipe too is activated by a sensor and is swivelled upwards, whereupon bag/sack no. 3 begins to be filled. According to the invention it is stipulated that a subsequent filtration of the water in the main container should be performed, the water filtering out on to a plate on which the sacks are standing and being conveyed out towards the outer walls of the main container, where there is placed on a projection a bag/hose which extends in the container and is filled with a filtrating mass through which the water passes before dripping down into the bottom of the container. This hose which extends in the container will catch any suspended particles which may have passed through the filtering bag/sack. According to the invention it is stipulated that this hose with filtration materials should also be replaced, e.g. annually together with the first-mentioned filtering bags/sacks. The preferably round main container has a protrusion on one side and it is stipulated that in this protrusion there should be placed a pump which transfers the now purified water to a new purification process with further filtration through various purification media and a finishing treatment; a U.V. radiation of the water in order to make it absolutely sterile and ready for re-use. The invention can be implemented in several variants and the attached drawing illustrates an embodiment where 1 indicates the actual main container, 2 indicates a feed-in pipe for waste water to a distribution container 3. From this flexible pipes 4 are passed at several levels up to open filtering bags/sacks 6. A distribution pipe 5 is illustrated in the lowest position, and after the bag/sack has been filled to the required level, sensors will activate a lifting mechanism, causing the pipe to be swivelled upwards and thereby out of operation. The outlet pipe 4 at the next level takes over and begins filling a new bag/sack, and the process continues until all the extended bags in the main container have been filled. The filtering bags/sacks 6 are standing with their bottoms against a plate 7 and the filtered water will be passed over the edges 8 of this plate and distributed approx¬ imately on the middle of a circumferential hose 9 with filtration media, which lie in a ring on a projection 10 around the main container 1. From the inside the hoses will be supported by the outer edges of a container 12, which is placed on the bottom of the main container 1. On one side this has a protrusion 13, in which there are inserted a pump 14 and a fan 15 together with the necessary level sensors, cables, etc. 16.

Claims: PATENT CLAIMS 1. Means for a purification/filtration plant for household waste water (grey water) and the like, characterized in that the used water is conveyed in pipes (2) into a distribution container (3) with outlet pipes at several levels, located at the top of a main container (1), from which water (2) is passed first from a pipe (5) at the lowest level to open filtering bags/sacks (6) for separation of solid and liquid particles, when the first filtering bag/sack (6) is filled, sensors warn an activating mechanism which puts the pipe out of operation, an output pipe from the next level (4) takes over and fills a new filtering bag sack, and the process continues until all the filtering bags/sacks in the main container are full. 2. Means for a purification/filtration plant for household waste water and the like, as specified in claim 1, characterized in that the outlet pipes (4,5) from the distribution container (3) are flexible/swivelling, a device which is activated by a sensor/float lifts the end of the pipe up and out of operation when a filtering bag sack is filled with solid particles. 3. Means for a purification/filtration plant for household wasie water and the like, as specified in claims 1-2, characterized in that the filtering bags/sacks (6) stand open with their bottoms against a plate (7), located at the desired height in the main container (1). 4. Means for a purification filtration plant for household waste water and the like, as specified in claims 1-3, characterized in that in the bottom against the outer edges the main container has a circumferential projection (10), and a built-in container where protrusions (11) on the outer walls together form a bed for a woven/perforated hose (9) filled with filtering materials which the water from the filtering bags/sacks in the container has to pass before running down on to the bottom of the container, from where it is transferred preferably by a pump to a filtration container for further purification and sanitation of the water for subsequent re-use. 5. Means for a purification/filtration plant for household waste water and the like, as specified in claims 1-4, characterized in that a plate (7) on which the filtering bags/sacks (6) stand conveys the filtered water for dripping approximately on to the middle of the circumferential hose (9). filled with filtration materials. 6. Means for a purification/filtration plant for household waste water and the like, as specified in claims 1-5, characterized in that on one side of the main container there is a protrusion (13), where an exhaust fan (14), pump (15), cables and level sensors (13) are located. 7. Means for a purification/filtration plant for household waste water and the like, as specified in claims 1-6, characterized in that the filtering bags/sacks consist of several bags/sacks placed on the outside of one another with increasing diameter which forms a desired space between the bags/sacks.

Inventors: KOEHLER JENS CHRISTIAN, RINGDAL LARS DI, WESTLIE LARS, KOEHLER, JENS, CHRISTIAN, RINGDAL, LARS +DI, WESTLIE, LARS
Applicants: BAKELITTFAB AS, KOEHLER JENS CHRISTIAN, RINGDAL JUDITH RAGNA & HF, WESTLIE LARS, BAKELITTFABRIKKEN A/S, KOEHLER, JENS, CHRISTIAN, RINGDAL, JUDITH, RAGNA +HF, WESTLIE, LARS
Application year: 1995
Main classification: B01D29
IPC codes: B01D29