IMPROVED MEANS OR METHOD OF CLARIFYING IMPURE WATER OR SEWAGE AND PREPARING THE PRECIPITATE OR SLUDGE FOR RE-USE
Year: 1874

page_text: LETTERS PATENT to Rupert Goodall, of Armley, near Leeds, in the
County of York, for the Invention of "IMPROVED MEANS OR METHOD OF
CLARIFYING IMPURE WATER OR SEWAGE AND PREPARING THE PRECIPITATE
OR SLUDGE FOR RE-USE."
Sealed the 1st June 1875, and dated the 3rd December 1874,
PROVISIONAL SPECIFICATION left by the said Rupert Goodall at the
Office of the Commissioners of Patents, with his Petition, on the
3rd December 1874.
I, RUPERT GOODALL, of Armley, near Leeds, in the County of York,
5 do hereby declare the nature of the said Invention for "IMPROVED MEANS
OR METHOD OF CLARIFYING IMPURE WATER OR SEWAGE AND PREPARING THE
PRECIPITATE OR SLUDGE FOR RE-USE," to be as follows:-
In treating impure water or sewage I mix it to and agitate it with
the following compound :-I take common ashes, those from house or
cottage stoves preferred, or waste lime from gas purifying operations
called gas lime, or waste lime from the stills used in the manufacture
of ammonia, and add thereto sulphuric acid or brown oil of vitrol so
long as effervescence takes place; I then add water in quantity to make

page_text: the mass sufficiently fluid to flow along spouts or pipes. From one to
two gallons of this compound is sufficient to deodorize, clarify, and
decolorise one thousand gallons of the impure water or sewage. The
impurities separate and fall to the bottom of the settling tank or vessel,
and the clarified water flows over the top thereof.
When the impure water or sewage contains soapy or unctuous matter
I use slacked lime first, about five pounds to one thousand gallons, or the
following mortar :-Say, six parts of slacked lime and one part of animal
carbon ground-together-with water, say, about twenty pounds to one
thousand gallons, and agitate until the impurities are separated; I then
add-from a half to one gallon of the acid compound before described and
agitate the whole together by suitable means.
In preparing the precipitate or (sludge) for re-use I lift it on to
strainers or filter beds and allow it to remain thereon until it has
acquired a butter-like consistency; I then take and add to one hundred
pounds of it about two hundred pounds of newly slacked lime and grind
the mixture together with water. This prepared sludge or precipitate
I mix and agitate with the impure water or sewage in the manner herein
previously described; about six pounds of this compound is sufficient to
clarify one thousand gallons of impure water or sewage.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Rupert Goodall in the Great Seal Patent Office
on the 3rd June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RUPERT
GOODALL, of Armley, near Leeds, in the County of York, send a
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of December, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Rupert Goodall, Her special licence
that I, the said Rupert Goodall, my executors, administrators, and
assigns, or such others as I, the said Rupert Goodall, my executors,
administrators, and assigns, should at any time agree with, and no

page_text: others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for " IMPROVED
MEANS OR METHOD OF CLARIFYING IMPURE WATER OR SEWAGE AND PREPARING
THE PRECIPITATE OR SLUDGE FOR RE-USE," upon the condition (amongst
others) that I, the said Rupert Goodall, my executors or admini-
strators, by an instrument in writing under my, or their, or one
of their hands and scals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Scal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Rupert Goodall, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, that is to say :—
In treating impure water or sewage I mix it to and agitate it with
the following compound :--I take common ashes, those from house or
cottage stoves preferred, or waste lime from gas purifying operations
called "gas lime," or waste lime from the stills used in the manufacture
of ammonia, and add thereto sulphuric acid or brown oil of vitrol so
long as effervescence takes place; I then add water in quantity to make
the mass sufficiently fluid to flow along spouts or pipes. From one to
two gallons of this compound is sufficient to deodorize, clarify, and
decolorize one thousand gallons of the impure water or sewage. The
impurities separate and fall to the bottom of the settling tank or vessel,
and the clarified water flows over the top thereof.
When the impure water or sewage contains soapy or unctuous matter
I use slaked lime, first about five pounds to one thousand gallons, or the
following mortar, say, six parts of slaked lime and one part of animal
carbon ground together with water, say, about twenty pounds to one
thousand gallons, and agitate until the impuritics are separated; I then
add from a half to one gallon of the acid compound before described,
and agitate the whole together by suitable means.
In preparing the precipitate or "sludge" for re-use I lift it on to
strainers or filter beds, and allow it to remain thereon until it has

page_text: acquired a butter-like consistency; I then take and add to about one
hundred pounds of it about two hundred pounds of newly slaked lime
and grind the mixture together with water. This prepared sludge or
precipitate I mix and agitate with the impure water or sewage in
the manner herein previously described. About six pounds of this
compound is sufficient to clarify one thousand gallons of impure
water or sewage.
I use the sulphate of gas lime or waste lime from ammonia stills for
cracking or separating the impuritics of such foul water or sewage,
thereby accelerating the separation and precipitation.
I use the sulphate of ashes for the purpose of brightening the
effluent ; also in cases where, from inadvertence or otherwise, an
overdose of lime has been given in the treatment, for the purpose
of converting such overdose of lime into sulphate of lime or gypsum,
the free lime at the same time acting on and separating the other
sulphates formed by the action of the sulphuric acid on the ashes
in the form of hydrates. Thus the great bulk of the chemicals along
with the impurities are precipitated to the bottom of the settling tank
or vessel, leaving the effluent water tolerably pure.
"
What I claim as novel or new in this Invention is the treatment of
gas lime," waste lime from ammonia stills and ashes, with sulphuric
acid so as to expel from them all noxious gases, and the use of such
sulphates in conjunction with slaked lime or paste, as already described,
either separately or in combination with each other, for the clarifying of
impure water or sewage.
In witness whereof, I, the said Rupert Goodall, have hereunto
set my hand and seal, this Twenty-seventh day of May, in
the year of our Lord One thousand eight hundred and seventy-
Witness,
J. W. TASKER,
Patent Agent,
Halifax.
R. GOODALL. (L.S.)