Improvements in or relating to the Treatment of Sewage.
Year: 1897

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I, ROBERT HARRIS REEVES, of Cedardale, Putney Bridge Road, Putney, London,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for object, certain means for treating sewage to destroy its
noxious properties and thereby capable of being manipulated and rendered fit for
transport and use for fertilizing land.
For the purpose of my invention, I employ an apparatus for mixing the in-
gredients or substances such as unslaked lime and gas tar with acidulated water
within a closed tank and which when thoroughly associated can be forced or be
drawn off.
The vessel or tank can be agitated or revolved according to its shape but I prefer
it of barrel shape and set at an angle on axles so that the contents can be turned
over and over and so intimately mixed. A safety valve is fitted to the barrel to
permit of escape of any unnecessary pressure that may be generated by the slaking
of the lime and that set up by the gas tar admixture, the result is a fluid free from
grease which I intend to call "Thamisin" and employ it at the outfalls, or at
collecting tanks for operating and purifying the sewage sludge.
"
If the fluid compound "Thamisin is to be used for purifying the air of drains,
I place it in a vessel or tank to which a series of pipes are in connection and then
propose to saturate it with steam which will permeate and produce a bubbling
action and this by an admixture of air under pressure will thin it down and render
it fit to be blown out in a coarse spray from a delivery pipe and nozzle and become
spread over the flowing sewage, its action serving also to condense the gases and
subdue the noxious vapours of the whole.
I have referred to the spraying effect on flowing but it is also applicable for use
at the outfall or while the sewage is passing into the tanks.
Improvements in or relating to the Treatment of Sewage.
I, ROBERT HARRIS REEVES, of Cedardale, Putney Bridge Road, Putney, London,
Engineer, do hereby declare the nature of this invention and in what manner the
[Price 8d.1

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement:-
This invention has for object, certain means for treating sewage at outfall
works to destroy its noxious properties and to facilitate precipitation of the
suspended matter and thereby rendering it capable of being manipulated fit for
transport or used for fertilizing land.
For the purpose of my invention, I use apparatuses for mixing the ingredients
or substances such as unslaked lime and gas tar with acidulated or other water
within a closed tank, and which mixture when thoroughly associated can be
forced or drawn, off. The vessel or tank can be agitated or revolved either by
hand or motive power.
A safety valve is fitted to the vessel to permit of the escape of gases generated
by the slaking of lime and that set up by the gas tar mixture beyond the desired
pressure required for the thorough association of the material.
"
The result is a fluid free from grease and which I intend to call "Thamisin
and employ it at the outfalls or collecting tanks for precipitating and purifying the
.sewage sludge.
My invention is clearly illustrated in the annexed drawings.
Figure 1 an elevation of mixer of the lime; gas tar, and acidulated water..
Figure 2 is an elevation of the apparatus for supplying the deodoriser in a hot
state.
Figure 3 is an elevation of a combined mixing and supplying apparatus.
Figure 4 is a sectional elevation of the outlet portion of a sewer or drain.
Figure 1. When the "Thamisin is required for treating sludge only, I prefer
to use as a mixer the apparatus herein shown.
This is a revolving vessel, on the inside of which are beaters A for the purpose
of breaking up and mixing the ingredients during the slaking of the lime. The
lime is placed dry in the vessel to which water acidulated or otherwise is added
with gas tar in proportion to the mature of the sludge. The gases given off are
absorbed partly in the mixture and that beyond the desired pressure passes away
through a safety valve B. During the time required for mixing, a revolving
motion is kept up, when the ingredients are thoroughly mixed it is drawn off
through manhole C and used as required.
"Thamisin
"
18
Figure 2 is an apparatus for applying diluted "Thamisin to the sewage in
a hot state under pressure. D is the vessel into which the "Thamisin"
placed. E is the steam inlet for heating and agitating the liquid. F is the
compressed air supply. G is a branch steam pipe for mixing steam with the
liquid as it is forced from the vessel through delivery pipe H.
Figure 3 is a form of mixer for supplying the
to the sewage at
the point where the sewage leaves the rising main or outfall sewer., I is the
mixer, the ingredients are placed in as described with reference to Figure 1 and
by the revolving arms J, the power being applied from bearings K driven by hand
or otherwise. The gases formed in this case are conveyed from the vessel through
pipe L to the sewage where it is used as a deodoriser. M is the pipe conveying
the Thamisin" to the sewage and it is delivered on the nozzle of steam pipe N
as shown. This improves the "Thamisin "--and delivers it in the form of a
fine spray. O is the water supply. P is the pipe conveying the compressed air
from the receiver for forcing out the "Thamisin," on each of the pipes a valve
is fixed to control the supply.
"
Figure 4 is the method I prefer to construct the outlet and to purify the gases
given off at the mouth of the outfall sewer. The chamber Q at the mouth of
sewer R is entirely closed in. The noxious gases escape through tubes S.
The mouths of these tubes are plain or serrated and dip slightly into a trough
or other vessel T containing liquid "Thamisin " or other suitable mixture. Thus
the air passing through or over the liquid as shown by the arrows is purified before
reaching the atmosphere. U is a swinging trap which dips into the sewage to form

page_text: ས་
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Robert Harris Reeves.