Improvement in Apparatus for the Treatment of Sewage or other Liquids.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvement in Apparatus for the Treatment of Sewage or other
Liquids.
WILLIAM PARE, Civil Engineer & Surveyor, North Road, West Bridgford,
Nottingham, do hereby declare the nature of this invention to be as follows:-
This invention relates to apparatus for automatically effecting the filling and
discharging of any liquid from any vessel or chamber which it may be desired to
fill & empty. It has particular reference to bacterial filters for treating sewage
or sewage effluent one of the leading principals being that each filter controls its
own actuating apparatus, thus being totally independent of the action of other
filters.
In the treatment of sewage or other liquids it is desirable. to work bacterial
filters on the intermittent system, by which method the filter is filled rapidly,
allowed a certain time to stand full, then rapidly discharged and allowed to stand
empty a certain time for aeration purposes the filter being then ready for another
application of sewage. It is also desirable that the above described actions should
be effected by automatic apparatus, which my invention is designed to accomplish.
One improvement relates to means for filling the filter beds automatically in
consecutive order or otherwise.
The filter beds are placed alongside each other and the main channel conveying
the liquid to the filters is placed along one end. The inlet to each filter is in the
form of a pipe with inlet valve attached, or other like contrivance, to allow the
liquid to enter from the before mentioned channel, and is submerged below the
top water level. Across the main channel conveying the liquid may be placed a
weir, the crest of which being about top water level. The liquid flows along the
main channel passes through the first inlet valve that is open until the filter is
filled to the level of the crest of the weir. It then flows over the weir and through
the next inlet that is open and thus filling that filter and so on ad infinitum."
Another improvement relates to means for automatically closing the inlet valve,
and opening the outlet valve, after the liquid has been locked in the filter the
desired length of time, and after the filter has remained empty the desired time
the action is reversed, the inlet valve being opened and the outlet valve closed by
the same apparatus.
66
The inlet and outlet valves are affixed by means of vertical rods to a lever arm
having an axle or fulcrum exactly midway between the aforesaid vertical rods.
The lever arm extends outwards on the side of the outlet pipe to a valve chamber
where it terminates with a slot, and through this slot is hung vertically down-
wards a rod carrying a specially constructed float, the upper part of which retains
liquid and the lower part being air tight. On this vertical rod are fitted two
stops, one above and one below the aforesaid slot.
*
The valve chamber containing the float is connected to the filter bed by two
pipes at different levels, and upon each in the valve chamber is affixed a plug tap
and an inverted ball valve, and upon the lower pipe is also affixed a reflux valve.

page_text: The two pipes act respectively as inlet and outlet from the valve chamber. By
adjusting the plug taps at the ends of the before mentioned pipes any desired
amount of liquid can be passed through the pipes, and when the inverted ball
valve comes into action the liquid passes through to the extent of the full bore of
the pipes.
The action of the apparatus is as follows. The inlet valve to the filter being
open and the outlet valve closed the liquid is passing from the main channel into
the filter, and when it rises to a level slightly higher than the upper of the two
pipes leading to the valve chamber, a regulated amount flows into the valve
chamber, and at the desired time raises the float, its vertical rod thus passing
through the slot at the end of the lever arm, until the lower stop on the rod
catches the lever arm; the ball valve having been regulated to come into operation
at this instant, quickly fills up the chamber and so raises the end of the lever
arm and by this action opens the outlet valve from the filter and closes the inlet
valve, thus emptying the filter of the contained liquid. The valve chamber now
slowly empties of its liquid by means of the regulated plug tap attached to the
lower pipe, at the instant the upper stop attached to the vertical float rod catches
the lever arm, the inverted ball valve then comes into action and rapidly empties
the chamber, the liquid retained in the upper or bucket portion of float will then
have sufficient force to pull down the end of the lever aim, and thus close down
the outlet valve and open the inlet valve and so complete the cycle of operation,
the liquid thus again flowing into the filter bed.
Another improvement is an alternative method of actuating the inlet and outlet
valves by means of a distinct lever arm and float attached to each valve, the one
actuating the inlet valve being su arranged to operate before the one actuating the
outlet valve; the various arrangements of pipes, ball taps, valve chamber, and
the like being the same as in the improvement last hereinbefore mentioned.
TOAL 1000
WILLIAM PARE,
Civil Engineer & Surveyor, North Road, West Bridgford, Nottingham.
Improvement in Apparatus for the Treatment of Sewage or other
Liquids.
WILLIAM PARE, of North Road, West Bridgford, in the County of Nottingham,
Civil Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:--
This invention has reference to improvements in, and relating to means or
apparatus for automatically opening and closing the inlet and outlet orifices to
bacterial filter beds of the kind used for the treatment of sewage. The said
improvements may also be used in connection with other tanks, chambers or
vessels it is desired to automatically empty and fill.
In the treatment of sewage by the bacteriological process, the sewage is
delivered to a filter bed and allowed to stand for a given time. The bed is then
emptied and remains empty for a further period of time, when the operation is
repeated. It is also desirable that the inlet and outlet orifices are opened and
closed at the desired time by automatic appliances, which at the present time is
generally effected for any one bed, by apparatus operated from another bed, so
that the filling and emptying of any bed depends upon what is taking place in
another bed.

page_text: This invention has for its object the provision of simple automatic appliances
whereby the inlet and outlet openings to any filter bed will be opened and closed
with any desired interval of time between the two operations, and independently
of any other filter bed or beds.
According to this invention, as applied to each filter bed, there is an inlet valve
from the sewage main carrier or channel, and an outlet valve for the effluent, and
these valves are opened and closed by a lever which is operated by a weighted
float in a valve or timing chamber. For operating the float there is an inlet pipe
from the filter bed to the valve chamber arranged to admit the effluent at a
determined rate until a certain level is reached, when the effluent opens a ball
valve, flows in rapidly and raises the float, which acts upon the lever to open the
outlet valve and close the inlet valve to the filter bed. The effluent in the valve
chamber then escapes slowly through an outlet pipe until it falls sufficiently to
bring into action a second ball valve which fully opens the outlet; the float then
descends and the inlet valve to the filter is opened and the outlet valve closed.
The pipes to the valve chamber are provided with valves or their equivalent for
regulating the flow of effluent to and from the valve chamber, and also check
valves and other usual and necessary fittings.
.
When the invention is used in connection with a series of filter beds, a weir or
its equivalent is placed in the main sewage carrier or channel between the filter
heds, so that these latter may be filled in any determined order, the number of
filter beds being regulated according to the quantity of sewage to be dealt with.
In the drawings which accompany this specification and are referred to in the
following detailed description
Fig. 1 is a sectional elevation of the improved apparatus.
Fig. 2 is a plan of the same, and
Fig. 3 is a key plan illustrating the application of the invention to a series of
filter beds.
The filter bed a is of the usual construction and is filled with any ordinary
filtering medium while on the bottom of the filter bed is the outlet pipe b pro-
vided with the usual side pipes. The sewage flows in a main carrier or channel c
which is, according to this invention, connected to each filter bed a by a pipe d.
This pine is provided with a valve e which is connected by a link or rod to a
double ended lever f which is fulcrumed at h. The valve e, as shown in the
drawing, is made with a flat face, provided with a rubber seating or washer: it
may have ground metal faces, or other valves of the kind ordinarily used in
sewage work may be employed. The outlet pipe is carried through the wall
of the filter bed into a discharge chamber and its open end is fitted with a
valve which is similar in construction to the valve e and is connected to the
lever by a link or rod which is suitable guided.
Beyond the discharge chamber i is the valve or timing chamber m provided with
a weighted float » which is connected to the outer end of the lever f. Communi-
cating with the valve chamber m is an inlet pipe o which is preferably connected
to the pipe some little distance from the valve k, and preferably fitted with a
check valve u. This pipe, inside the valve chamber, is fitted with an inlet tap
by which the rate of flow into the valve chamber m can be regulated and also with
a ball valve g or its equivalent. The valve or the connected pipe is preferably
so arranged that the flow of effluent into the valve chamber does not commence
until the filter bed is nearly full, but with a large valve chamber, or a very small
inlet effluent may be allowed to enter the valve chamber at any time.
Near the bottom of the valve chamber is the outlet pipe r fitted with a reverse
action ball valve s or its equivalent, a check valve, and connected to the outlet
pipe b. Opening into the pipe r is the outlet-timing pipe provided with a tap
for regulating the size of the outlet, and carried up to such a height that the
valves is opened by the fall of its ball before the end of the piper is uncovered.
The positions of the balls of the valves q and s, relatively to the float n are so
arranged that the valve g is opened at the time it is desired to raise the float for

page_text: opening the outlet valve to the filter bed, and the valves is opened at the time
it is desired to let the float fall and open the inlet valve to the filter bed.
"
In the drawings the parts are shown in the positions they occupy just after the
outlet valve has been opened. the effluent flowing away to the channel w. At
this time the valve chamber is nearly full of effluent, which commences to run
back into the filter bed through the outlet timing pipe e, the opening of which
is so regulated that the time required to lower the effluent until the valve s is
opened, is the time required to empty the filter bed and for the filter bed to stand
empty for purification. When this point is reached the valve s is opened, the
effluent sinks rapidly and the float falls, and in so doing closes the valve and
opens the valve e. The sewage then commences to flow into the valve chamber
through the timing valve p which is so regulated that the time required to com-
plete the filling of the filter bed and the time the filter bed stands full of sewage,
is the time required for the effluent to flow through the valve p until it is high
enough in the chamber m to open the valve q. Effluent then flows in rapidly,
the float is raised, the valve e closed, the valve k opened and the cycle of opera-
tions is completed.
When this invention is used in connection with a number of filter beds these
latter are preferably at or about the same level and the main carrier c, Fig. 3, is
arranged to fill the beds a a¹ and a² in any determined order. Between each bed
and in the main carrier c there is a weir a or its equivalent, and the sewage flows
into the filter bed a until the bed is filled, the sewage then tops the weir and
flows into the filter bed a¹ if this is ready, but if not, the sewage tops the next
weir and flows into the next empty filter bed. Each filter bed is fitted with an
arrangement of valves, pipes, float, lever and chambers as described with refer-
ence to Figs. 1 and 2, and the order in which the beds are filled and emptied
depends upon the number and size of the beds, the quantity of sewage to be dealt
with, and other circumstances and conditions usually connected with the disposal
of sewage by the bacteriological method.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The combination and arrangement of pipes, valves, fittings, and connections
substantially as herein described with reference to the accompanying drawings and
for the purpose herein specified.
2. The construction and general arrangements of the apparatus herein described
with reference to the accompanying drawings for purpose herein specified.
'ሰሶ፣
וז זו סד גד
Dated us on thay
W. H. POTTER, Wh.Sc.,
Patent Agent, Brougham Chambers, Nottingham.
W. H. POTTER, Wh.Sc.,
Patent Agent, Brougham Chambers, Nottingham.