IMPROVEMENTS IN THE MEANS OR METHOD EMPLOYED FOR TREATING AND UTILIZING THE MUD OR SLUDGE PRECIPI- TATED FROM SEWAGE OR OTHER IMPURE WATERS IN THE OPERATION OF CLARIFYING THE SAME, SUCH IMPROVEMENTS BEING ALSO APPLICABLE FOR TREATING AND CLARI- FYING SEWAGE OR OTHER IMPURE WATERS, AND FOR OTHER PURPOSES
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Samuel Hallsworth and Richard
Bailes at the Office of the Commissioners of Patents on the 9th April 1878.
SAMUEL HALLSWORTH, of Armley, and RICHARD BAILES, of Woodhouse Carr,
both near Leeds, in the County of York. "IMPROVEMENTS IN THE MEANS OR
METHOD EMPLOYED FOR TREATING AND UTILIZING THE MUD OR SLUDGE PRECIPI-
TATED FROM SEWAGE OR OTHER IMPURE WATERS IN THE OPERATION OF CLARIFYING
THE SAME, SUCH IMPROVEMENTS BEING ALSO APPLICABLE FOR TREATING AND CLARI-
FYING SEWAGE OR OTHER IMPURE WATERS, AND FOR OTHER PURPOSES."
Our Invention consists in drying and calcining the mud or sludge produced,
when slacked lime, either alone or in combination with other chemical ingredients,
have been used in the treatment of sewage or other impure waters, and in the use
of such calcined material, in combination with other ingredients in the treatment
of sewage or other impure waters, and for other purposes.
We, as the first operation, dry the mud or sludge by throwing it on a heap, and
allowing it to drain and dry as much as possible in the open air; or artificial
means for drying the same may be employed. We then put it into a furnace
suitable for the purpose, and subject it to a very severe calcination, afterwards
removing it from the furnace, and having cooled, it is ready for use as hereafter
described.
The mode of treating sewage or other impure waters is as follows:-The sewage
or impure water may be run into a tank or other suitable receptacle. If tannin,
catechu, or other astringent matter be present we proceed as follows:-To, say,
about twenty thousand gallons, about fifty gallons of any of the neutral solutions
of iron named in our Patent No. 952, dated March 9th, 1877, is added, and well
mixed therewith. About three hundred pounds of the above-mentioned calcined
material, and about one hundred and fifty pounds of slacked lime is now mixed
with water to a milky state, and then added to the impure water under treatment,
after which the whole is well mixed together and agitated by ordinary known
means, and afterwards allowed to settle. The impurities and discolourations are
precipitated, and the clear water may then be run off.
In some sewage or impure waters much iron is present.

page_text: In treating sewage of this nature we proceed as follows:-To, say, about twenty
thousand gallons of such sewage, a decoction of sumac, myrabolams, or other
astringent matter is added, and well mixed until it assumes an inky or black
colour. About two hundred pounds of the herein-before mentioned calcined
material, and about one hundred pounds of slacked lime (taken together), or about
two hundred pounds of slacked lime (alone) mixed with water to a milky state is
then added, and well mixed, and when settled the clear water may be run off.
In treating sewage or other impure water impregnated with dye, but which may
be free from tannin, catechu, or other astringent matter we proceed as follows:-
To, say, about twenty thousand gallons, about eighteen gallons of any of the acid
solutions of iron or dissolved copperas named in the fourth part of our Specification
of Patent No. 952, dated March 9th, 1877, is added, and well mixed therewith.
About fifty pounds of the calcined material, and fifty pounds of slacked lime, is
mixed with water to a milky state, then added, and well mixed again. The impure
water under treatment becomes "curdled or "cracked," the impurities and dis-
colourations are precipitated, and when settled the clear water may be run off.
The other purposes to which we apply the calcined material are as follows:-A
good mortar is produced therefrom for building purposes when mixed with about
two parts of coal ashos (ground) or sand, and sufficient water to make the mortar
the desired consistency.
It can also be used in purifying coal gas, instead of hydrate of lime or slacked
lime, for which purpose it is slightly moistened with water, and put on the trays or
sieves in the purifiers about the same thickness as lime, and allowed to remain in
the purifiers until it ceases to purify the gas.
The calcined material may also be used for other purposes as a substitute for
lime.
It is also found to make a good disinfectant when mixed with carbolic acid.