Improvements in Apparatus for the Treatment of Sewage and other Liquids.
Year: 1896

page_text: Date of Application, 20th July. 1896-Accepted, 5th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for the Treatment of Sewage and other
Liquids.
I EDWARD WILLIAM IVES of No. 2 Strand in the Town and County of
Derby, 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 relates to improvements in the general arrangement and details
of the apparatus forming the subject of my prior Patents No. 13411 of 1893,
No. 16724 of 1894, N. 20744 of 1894, and No. 22545 of 1895.
Fig. 1 is a plan of an apparatus constructed according to this invention and
Figs. 2, 3 and 4 are vertical sections on the lines 2-2, 3-3, and 4-4 (Figure 1).
respectively.
The sewage waste or foul water enters a chemical chamber, detritus sump and
storm overflow combined at A thence into a circular screening chamber B such as
is described in my Specification No. 16724 of 1894. This screening chamber also
acts as a safety valve to the precipitating tank and prevents the upsetting of the
contents of the same during storms by disturbing the suspended matter both it and
the chamber A are provided with storm overflows C. The sewage entering the
screening chamber at a tangent to the outer wall gyrates round and round forming
a whirlpool whirling the floating solids such as excreta, paper and solids usually
found in sewage against the batters D by which they are broken up and brought
into suspension fit for chemical treatment which takes place in this chamber. The
sewage gravitates through the pipe E into the mixing and chemical race F and
additional chemicals can be added in the sump Gif required after the sewage
passes along the mixing race H it falls into sumps 1 then into the inlet pipes J to
the precipitating tank K at its centre L it is then distributed by distributing
arms M such as are described in my Specification No. 13411 of 1893 and rises in
the tank K the solids in suspension and brought into suspension by means of the
chemicals falling into the sludge sump N. By reason of the falling solids the
sewage entering the tank as described has to pass through these solids thus filtering
itself and passing upwards flows through the overflow arms O such as are described
in my Specification No. 20744 of 1894 and out at the effluent outlet P to the land
brook river or canal as most desirable by the channel p.
Should it be necessary to further purify or filter the effluent I close the valve Q
the effluent then rises in the tank K covering the bottom of the ventilating
cylinder R forming by this means an air chamber S. As the effluent rises this air
is forced through a filter T thus aerating it, the filtered water passing over the
wall U into the effluent channel V. By again opening the valve Q the water is
lowered from the filter until its level is below the bottom of the air cylinder R
when fresh air is immediately let into the bottom of the filter. The valve Q
being again closed the water rises again forcing fresh air through the filter as
before described, this operation cau again and again be repeated according to the
degree of purity required for the effluent.
Should a still higher standard of purity be required another filter W is provided
to further filter the effluent by upward filtration. This filter is designed to act in
the same manner as the filter before described, a plate X runs along the whole
length of the filter when the incoming water reaches the bottom edge of this plate
an air chamber y is found under the same and by reason of the upward action of

page_text: the water the air is forced through the filter as before described, this filter is
emptied for the purpose of aeration by opening the valve Z lowering the water
until it falls below the edge of the plate X the valve is again closed and fresh air
forced again through the filter. When this filter is not in use air is sucked through
the bottom of the filter by means of exhaust cowls.
The precipitated sludge falls into the sludge sump (1) and is extracted by means
of pumps or syphoning through a cone suction (2) such as is described in my
Specification No. 22545 of 1895 which ensures the uniform and regular extraction
of all precipitated sludge from the bottom of the sludge cone (1) and the sides of
the same.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination of a horizontal filter, an air chamber open at the bottom
beneath the filter and means for alternately causing the liquid to rise through the
filter and to fall beneath the level of the bottom of the air chamber substantially
as described.
2. The combination of the precipitating tank, the filter and the ventilating
chamber substantially as described and shewn in the drawings.
3. The combination with the screening chamber B of the chemical chamber,
detritus sump and storm overflow A substantially as described.
4. The combined apparatus for the treatment of sewage and other liquids
substantially as described and shown in the drawings.
Dated the 20th day of July 1896.
EDWARD WILLIAM IVES.