Improvements in the Construction of Settling Tanks or Lodges Used in the Purification of Sewage and other Foul Waters, and in the Clarification of Manufacturers' Liquid Compositions.
Year: 1896

page_text: Date of Application, 11th Feb., 189
Complete Specification Left, 11th Nov., 1896-Accepted, 23rd Jan., 1897
Improvements in the Construction of Settling Tanks or Lodges
Used in the Purification of Sewage and other Foul Waters, and
in the Clarification of Manufacturers' Liquid Compositions.
JAMES BURY PETRIE of 100 Tweedale Street, Rochdale, in the County of
Lancaster, Consulting Agent do hereby declare the nature of this invention to
be as follows:-
My invention relates to the construction of settling tanks or lodges used in
the purification of sewage and other foul waters, and in the clarification of
manufacturers' liquid compositions, which may be used with an intermittent or
continuous flow.
In settling tanks or lodges I place one inclined surface or more, which surface
or surfaces may be constructed of glazed bricks, tile or slabs, or of any other
suitable material, down which the impurities to be settled will readily descend and
by this means the purification will be accelerated and the impurities deposited so
as to be from time to time easily removed.
The settling tanks or lodges may be constructed in a variety of forms provided
one or both sides, or one or both ends be an inclined surface. Where required
there may be a series of tanks or lodges used.
In some cases I divide a settling tank or lodge into two parts by placing a
division between the inlet and outlet sides, such division extending from the upper
part of the tank or lodge to the bottom thereof. Thus the first half will be filled
until the sewage or other foul water or liquid compositions being purified or
clarified, overflows the division into the second part or half of the settling tank
or lodge. In each part of the settling tank or lodge I use an inclined plane or
surface extending from the base of the dividing wall to the top, or approaching to
the top, of the settling tank or lodge making the first part of the tank the inlet,
and the second part the outlet for the sewage or other foul waters or liquid
compositions, the flow being continuous.
At the base of the dividing wall or partition, may, on each side of it, be formed
a chamber or space for receiving the mud or other impurities or solids deposited in
the course of settling. In such chamber or space suitable tubes and valves may be
placed so as to remove the deposited matter as required.
In some cases one inclined surface only might be required.
In combination with the inclined surface or surfaces place one or more divisions
across the flow of the sewage or other foul waters or liquid compositions requiring
to be settled or clarified, and extending from the top of the tank or lodge but not
extending to the bottom thereof.
Dated this Tenth day of February 1896

page_text: Improvements in the Construction of Settling Tanks or Lodges
Used in the Purification of Sewage and other Foul Waters, and
in the Clarification of Manufacturers' Liquid Compositions.
I, JAMES BURY PETRIE of 100 Tweedale Street Rochdale in the County of
Lancaster Consulting Agent 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 :-
My invention relates to the construction of settling tanks or lodges used in the
purification of sewage or other foul waters and in the clarification of manufacturers'
liquid compositions which may be used with an intermittent or continuous flow.
In settling tanks or lodges I place one inclined surface or more which surface or
surfaces may be constructed of glazed bricks tiles, or slabs or of any other suitable
materials such having a smooth surface but preferably sheets of glass down which
smooth inclined surface or surfaces the impurities to be settled will readily descend
and by this means the purification will be accelerated and the impurities deposited
at the bottom of the tank so as to be, from time to time easily removed or allowed
to fall or pass out.
The settling tanks or lodges may be constructed in a variety of forms provided
one or both sides or one or both ends be an inclined surface or surfaces. Where
required there may be a series of tanks or lodges used..
According to my construction I divide a settling tank or lodge having two
inclined sides into any convenient number of parts or compartments by placing a
partition piece or pieces between the inlet and outlet sides or parts such partition
piece or pieces extending from or near the upper part of the tank or lodge to the
bottom thereof and are placed transverse to or across the tank or transverse to the
flow of the foul water, thus the first compartment will be filled until the sewage or
other foul waters or liquid composition entering the tank overflows the partition piece
into the second part or compartment. In each part or compartment of the settling
tank or lodge I thus form the sides of two inclined planes or surfaces extending
from the base of the dividing wall or partition which latter extends to the top, or
approaching to the top of the settling tank or lodge making the first part of the
tank the inlet or reception compartment and the second part the outlet or final
settling compartment for the sewage or other foul waters or liquid composition,
the flow being continuous.
At the base of the dividing wall or partition may, on each side of it, be formed
a chamber or space for receiving the mud or other impurities or solids deposited in
the course of settling. In connection with such chamber or space of each com-
partment a suitable outlet orifice and valve is placed for the purpose of allowing
the deposited matter to pass or fall out into a suitable receptacle for conveying the
said deposit to any convenient place as may be desired. In some cases one
inclined surface only might be required and employed in conjunction with the
partition pieces and forming compartments in manner as before described.
If desired I may place or arrange the partition pieces so as to extend from the
top of the tank or lodge but not extending to the bottom thereof so as to admit of
the flow below the surface of water in the tank. But I find in practice that it is
more beneficial to allow the flow to occur at the surface and over the partition or
series of partitions.
In order that my invention may appear more intelligible I have hereunto annexed
two sheets of drawings in which similar letters of reference indicate similar parts
throughout the various figures therein shown.

page_text: Figure 1. is a sectional elevation showing a longitudinal view of a tank
illustrating two partition pieces and three compartments which number will suffice
for the present purposes of explaining my invention..
Fig. 2. is a plan of Fig. 1 showing four compartments.
Fig. 3 is a cross section of Fig. 1. The tank shown in dotted lines represents
the employment of a second tank B. situate parallel or alongside tank A.
Fig. 4 is a cross section of Fig. 1 drawn to an enlarged scale.
According to my construction and as represented in the drawings the tank a.
which may be constructed of wood metal or other material is mounted on or
supported by suitable pillars or supports b, which tank is formed with inclined
sides a', upon which are provided sheets of glass a² and in the interior of which
are placed or situate partition pieces or parts c, which extend upwards from the
bottom of the tank to or near its upper part. I employ the said partitions c, as
shown for the purpose of forming separate compartments d, and of such or suitable
heights so as to allow or admit of the flow or passage of foul water to be treated,
over the upper edges c¹, of the said partitions.
The sewage or foul waters to be treated are conveyed into the tank by means of
the trough e, thus emptying in the first instance in the compartment d' when
this compartment is filled, then flows over the ridge or edge c' into compartment d²,
thence over c², into compartment d³, and so on continues to flow into each successive
compartment or series into which the tank may be divided or apportioned; the
depth of flow over the partition pieces may be varied more or less by regulating
the outlet orifice at the opposite end of the tank, i.e. opposite the inlet end, for the
exit of the treated waters and through which outlet orifice only the treated waters
are allowed to pass out on to a suitable apparatus or filter for the purposes of
further treatment as may be necessary in the treatment of certain waters for
example fellmongers' effluents, whilst the solids or matter in suspension are allowed
to fall or gravitate to the bottom of the tank and in such event consequently to
fall on to the glass provided surfaces of the angular or inclined sides a¹, thus the
sediment or deposit is caused to converge at the lower part thereof. When any
of the compartments are filled with sludge deposits the outlet valves f for
are operated or raised by turning the screw threaded rods f f f and the sludge
is thus allowed to pass or fall out through the orifices 9 9 9² into the sludge or
conveying troughs h h h² to any convenient place for removal.
During the flow of sewage through the tank, in some cases it may be practicable
to allow one or more of the sludge valves to remain partially open so as to allow
of a gradual and continuous discharge of sludge.
Thus according to my invention when the sludge-outlet valve is raised in any
individual compartment the sludge by its own weight must consequently fall
through the orifices provided and the fall of the lower substratum of the deposits
therein are caused being due to a combination of form and the smooth surfaces of
the sides which enable or admit of the super-adjacent or the whole of the said
deposits to rapidly or quickly pass from compartments of the tank.
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. In an apparatus for the purification of sewage or other foul waters, in com-
bination the inclined sides a¹ covered with glass or other like material of the tank a
the partition piece c, the sludge valve f, and the trough h, substantially as and
for the purposes herein set forth and described in the annexed drawings.
2. In combination a tank having angular-situated or inclined sides covered with
glass or other material, having smooth surfaces, and one or more partition pieces
forming compartments as and for the purposes herein set forth.
3. In combination a tank having angular or inclined sides covered with glass
or other like material and a sludge outlet valve or valves as and for the purposes
herein set forth.

page_text: 4. The glass covered angular or inclined sides of a tank as and for the purposes
herein fully set forth.
Dated this 10th day of November 1808
JAMES B. PETRIE.
. J. H. Butterworth & Co.,
Rochdale,
For the Applicant.