Improvements in the Treatment of Wash Waters, Sewage, and other Fouled Waters in order to Purify the same.
Year: 1894

page_text: Date of Application, 27th Dec., 1894
Complete Specification Left, 23rd Aug., 1895-Accepted, 5th Oct., 1895
PROVISIONAL SPECIFICATION
Improvements in the Treatment of Wash Waters, Sewage, and other
Fouled Waters in order to Purify the same.
We THOMAS ORAIG, of the Firm of Isaac Holden and Sons, of Alston Works,
Biadford, in the County of York, Wool Comber, and ARTIILE ERNEST RAPER,
of the same place and in the employment of the said fum, Analytical Chemist do
hereby declare the nature of this invention to be as follows
1
In the disposal of the waste wash waters of wool combing establishments great
difficulty is experienced and ordinarily great objection is raised by local authorities
to their being allowed unpunified to enter the sewers or water courses; also
corporations and municipal bodies find similar difficulties and habilities to asc
in disposing of sewage and other foul waters in an unclanified condition, and so also
like trouble attends the getting rid of other foul waters.
In order to lessen or remove these difficulties we punify more or less com-
pletely the wash waters, sewage or other foul waters in a suitable reservoir or
vessel by adding thereto a small quantity of clay or other aluminous or silicious
matter of suitable character in the presence of acid the waters must be
in a slightly neid state for the clay to do its work.
.
Sewage waters or sewage as a ule being neutral it is necessary to add a
small quantity say 3 gallons per 10,000-of acid in order to ensure the water
being cleared.
These precipitating matters may be stirred into the mass of foul liquid or
otherwise added ther to
Upon allowing the foul water thus treated to stand for say one hour the foul
matters will be precipitated and the supernatant water can be run off into the water
comses or sewers without danger or damage
One great object in such waters is to rid them of their contained grenses.
Some waters we have experimented upon contain grease in as high a pioportion
as 50 to 60 grams to the gallon of wash water and we have by our treatment been
enabled to reduce this proportion of grease to as low as 2 or 3 grains to the gallon.
Again, in sewage waters treated by us, the grease has been found to be present
before treatment in the proportion of about 50 grains to the gallon whilst the
effluent water after this treatment shewed as little as 2 or 3 grains to the gallon
also, and was in a very pure condition.
Dated the 27th day of December 1894.
COMPLETE SPECIFICATION.
Improvements in the Treatment of Wash Waters, Sewage, and other
Fouled Waters in order to Purify the same.
We THOMAS CRAIG, of the Firm of Isaar Holden and Sons, of Alston Works,
Bradford, in the County of York, Wool Comber, and ARTHUR ERNEST RAPER,
of the same place and in the employment of the said firm, Analytical Chemist, do
「ᎠᎡᏗ 1

page_text: hereby declare the nature of this invention and in what manner the same 18 to
be performed, to be particularly described and ascertained in and by the following
Atatement :-
In the disposal of the waste wash waters of wool combing establishments great
difficulty is experienced and ordinarily great objection is raised by local authorities
to the heing allowed unpunified to enter the sewers or watercourses, also
corporations and municipal bodies find siraila difficulties and liabilities to arise
in disposing of sewage and other foul waters in an unclarified condition, and so
also like trouble attends the getting rud of other foul waters
In order to lesson or remove these difficulties we purify more or less com-
pletely the wash waters, sewage or other foul waters in a suitable reservoir or
vessel by adding thereto a small quantity of clay, shale or other silicious enrth
of suitable character in the presence of acid 122. the waters must be in a
slightly acid state for the clay to do its work
Sewage waters as a rule being neutral it is necessary to add a small quantity—
Bay 3 gallons per 10,000-of acid in order to ensure the water being cleared.
These precipitating matters may be stirred into the mass of foul liquid on
otherwise added thereto
Upon allowing the foul water thus treated to stand for say one hour the foul
matters will be precipitated and the supermatent water can be run off into the water
courses or sewers without danger or damage.
One great object in the punification of such waters is to rid them of their
contained greases. Some waters we have experimented upon contain grease in as
high a proportion as 50 to 60 grains to the gallon of wash water and we have by
our treatment been enabled to reduce this proportion of grease to as low as 2 or
3 grains to the gallon. Again, in sewage waters treated by us, the grease has
been found to be present before treatment in the proportion of about 50 grains to
the gallon whilst the effluent water after the treatment shewed as little as 2 or
3 grains to the gallen also, and was in a very pure condition.
In practically carrying into effect our improved process for the funther
purification of water from wool scouring works after the greater part of the greasy
matter has been extincted by ordmaly or known meaus of extraction for the
or for purifying other waste water, sewage, etcetera, we proceed as
game,
follows
If such water be acid, as is usually the case with wool scouring liquors when the
acid treatment for grease recovery has been used-an emulsion of clay, shale or
other Bilicious earths with water is added until practically all the oily on greasy
matter present in the waste water has been absorbed by the clay.
The mixtune of clay and fatty matter will subside rapidly as a flocculent
precipitate leaving the water quite clear.
Should the water which has to be purified be neutral or alkaline, the sanie
process is carried out with this addition, that suthcient acid (any mineral acid) is
mixed in after the clay, to make the bulk faintly acid.
Our method of working is as follows
-
A large tauk of capacity say 2,500 gallous and provided with a mechanical
stirier is filled with the water which requires purification.
In a smaller tank proximate to the large one, is the mixture of clay and water,
this smaller tank is piovided with a sturer and the clay is put into it more or less
in the tough or ground to a fine powder.
It is an advantage in mixing the clay to use the same water that has to be
treated, as any acid presont helps to disintegrate the olay.
When the clay and water in the smaller vessel are in an emulsified state, a
quantity of the mixture 18 run into the water which has to be punified. Tho
amount required varies directly with the amount of grease in suspension in the
water, should honeyor too much clay be added, the excess can be utilized in
clearing the next tankful of water, as the mud which settles from the water only
requires removal after 10 or 12 mixings

page_text: When sufficient clay has been added to the water, the whole is thoroughly
agitated and allowed to rest for 1 hour after which, the clear water in the tank
may be run off and the tank refilled, when the operation is repeated; the mud at
the bottom of the tank being stirred into every fresh mixing.
When there is too much mud in the tank, a portion or the whole of it is run into
filters to rid it of the water which it holds.
When air dried, the mud contains from 25% to 30% of grease which may be
extracted by pressure or with solvents.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim 18
-
The method of treating acid on acidified waters from wool scouring works after
the greater part of the greasy matters have been extracted, or other foul or sewage
waters, with an emulsion of clay, shale or other silicious earth with water, as and
for the purpose herein before set forth.
Dated the 21st day of August 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.