Improvements in the Method of Purifying Sewage and Trade Effluents.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892
Complete Specification Left. 3rd Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Method of Purifying Sewage and Trade
Effluents.
I, WILLIAM OLDFIELD, of Water Street, Windhill, Shipley in the County of
York, Chemist, do hereby declare the nature of this invention to be as follows:-
This invention has for its object the more effectual purification of sewage and
trade effluents, either separately or combined, in a simpler and more effective, and
less costly manner by what is known as the precipitation system, carried out in such
a way, that, less space is required for purifying the liquid than is occupied by the
systems of precipitation and clarification in use as hitherto..
I accomplish my object by constructing a series of tanks so arranged that, the
liquid from one tank will flow into the next, and before or at the time, the sewage
or trade effluent flowing separately or combined enters the first tank, combine
therewith a solution of metallic or mineral chloride obtained from ores or oxides
dissolved in bydrochloric or other suitable acid. The chloride so formed, on
amalgamating with the sewage or trade effluent causes the bulk of the impurities to
precipitate and settle to the bottom of the first tank.
At the overflow of the first tank more chloride may be added, or the overflow
from that and the subsequent tanks may be conducted in a shallow stream over an
extended surface, thus exposing the partly clarified liquid, and chloride amalgamated
therewith, to the influence of the oxygen in the atmosphere, thereby expediting the
purification of the sewage or the like by oxydation.
Dated this 1st day of November 1892.
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Method of Purifying Sewage and Trade
Effluents.
I, WILLIAM OLDFIELD, of Water Street, Windhill, Shipley, in the County of
York, Chemist, 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 for its object, the more effectual purification of sewage and
trade effluents, either separately or combined, in a simpler more effectual and less
costly manner by what is known as the precipitation system, carried out in such a
way that, less space is required for purifying the liquid than is occupied by the
system of precipitation and clarification in use as hitherto.
I accomplish my object by constructing a series of tanks of about equal capacity,
so arranged that the liquid will flow from one tank into the next.
My purifying agency is composed of iron oxide and magnetic iron ores dissolved in
hydrochloric, sulphuric or other suitable acid applied either separately or combined.
This solution is mixed with the sewage or trade effluent in the nanner as hereinafter
described.
The sewage or trade effluent is by preference conducted into the first settling
tank through a long trough, into which the purifying compound is also run, where
it amalgamates with the sewage or the like; causing the affinity of the liquid and
solids in the sewage or the like to break to such an extent that, the freed solids
settle to the bottom of the first tank.
The overflow from the first and subsequent tanks may be conducted in a shallow
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page_text: stream, over an extended surface, and at the overflow of the first or any subsequent
tank, more of my purifying agency may be added for further precipitating any
impurities remaining in the sewage liquid.
By conducting the overflow from tank to tank, over an extended surface, the
partly clarified liquid and chloride amalgamated therewith, is exposed to the
influence of the oxygen in the atmosphere, thereby facilitating the purification of
the sewage or the like by oxidation.
The amount of purifying agency to be added to the sewage or the like, varies
according to the nature and amount of impurities; with purely domestic sewage, I
find that about eight grains to the gallon of sewage is sufficient, but in districts
where textile and other industries are carried on; with sewage and trade effluents
combined containing 12 to 20 ounces of solids to the gallon, the requirements will be
from 10 to 20 grains of purifying agency, the quantity varying according to the
density of the liquid, the last named weight of purifying agency per gallon, being
sufficient for the purification of the most putrid sewage and trade effluent either
separately or combined.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The method of purifying sewage and trade effluents by amalgamating therewith
iron oxide and magnetic iron ores dissolved by hydrochloric, sulphuric or other
suitable acids and applied substantially in the manner described.
Dated this 2nd day of August 1893.
JOHN WAUGH,
Agent.