IMPROVEMENTS IN THE TREATMENT OF SEWAGE, AND IN THE PRODUCTION OR MANUD NG
Year: 1870

page_text: LETTERS PATENT to Astley Paston Price, of 47, Lincoln's Inn Fields,
in the County of Middlesex, Consulting Chemist, for the Invention
of "IMPROVEMENTS IN THE TREATMENT OF SEWAGE, AND IN THE PRODUCTION
OR MANUD NG "
Sealed the 1st November 1870, and dated the 7th May 1870.
PROVISIONAL SPECIFICATION left by the said Astley Paston Price at
.
the Office of the Commissioners of Patents, with his Petition, on
the 7th May 1870.
I, ASTLEY PASTON PRICE, of 47, Lincoln's Inn Fields, in the County
of Middlesex, Consulting Chemist, do hereby declare the nature of my
said Invention for "IMPROVEMENTS IN THE TREATMENT OF SEWAGE, AND IN THE
PRODUCTION OF MANURES," to be as follows:-
This Invention relates to the employment of the product which is
obtained by the action of an acid or acids, such, for example, as
sulphuric or hydrochloric acid upon natural phosphates containing
phosphate of iron or phosphate of lime, or mixtures of the same, or

page_text: mixtures of phosphate of lime and phosphate of alumina, or mixtures of
phosphate of alumina and phosphate of iron, or of mixtures of phosphate
of lime, of phosphate of iron, and of phosphate of alumina, for the
treatment of sewage, either alone or in conjunction with lime or with
carbonate of lime, or with such base as will effect the precipitation of
the phosphates, and cause the separation of the suspended and other
constituents of the sewage.
mixtures of phosphate of lime and phosphate of alumina, or mixtures of
phosphate of alumina and phosphate of iron, or of mixtures of phosphate
of lime, of phosphate of iron, and of phosphate of alumina, for the
treatment of sewage, either alone or in conjunction with lime or with
carbonate of lime, or with such base as will effect the precipitation of
the phosphates, and cause the separation of the suspended and other
constituents of the sewage.
The precipitated phosphates thus obtained, in conjunction with the
constituents separated from the sewage, may, either before or after
dessication, be employed as a manure or as a constituent of manure.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Astley Paston Price in the Great Seal Patent
Office on the 7th November 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ASTLEY
PASTON PRICE, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Consulting Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of May, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Astley Paston Price, Her special license that
I, the said Astley Paston Price, my executors, administrators, and
assigns, or such others as I, the said Astley Paston Price, my executors,
administrators, or assigns, should at any time 'agree with, and no
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 "IMPROVEMENTS IN
THE TREATMENT OF SEWAGE, AND IN THE PRODUCTION OF MANURES," upon the
condition (amongst others) that I, the said Astley Paston Price, 'my
executors or 'administrators, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,

page_text: 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 Astley Paston Price, 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 :-
My said Invention relates to the employment of the product which
is obtained by the action of an acid or acids, such, for example, as
sulphuric or hydrochloric acid or mixtures of the same upon natural
phosphates containing either phosphate of iron or phosphate of lime, or
mixtures of the same, or mixtures of phosphate of lime and phosphate of
alumina, or mixtures of phosphate of alumina and phosphate of iron, or
of mixtures of phosphate of lime or phosphate of iron, and of phosphate
of alumina, for the treatment of sewage, either alone or in conjunction
with lime or with carbonate of lime, or with such base as will effect
the precipitation of the phosphates, and cause the separation of the
suspended and other constituents of the sewage.
In carrying out my Invention I firstly submit to the action of an acid
or acids, such, for example, as sulphuric or hydrochloric acid, or of
mixtures of the same, any of the before-mentioned natural phosphates or
mixtures of them, and having converted such phosphates as are capable
of being rendered soluble by the action of the before-mentioned acids
into a soluble form.
I either employ the same or a solution thereof in the following
manner :- -Whilst the sewage is contained in a cistern or reservoir, or
whilst it is in the act of flowing thereinto, the requisite proportion of
the soluble phosphates is to be added thereto, and after thorough admix-
ture with the sewage by the use of agitators or other well-known means
the sewage so treated may be allowed to remain tranquil in the reservoir
in order that subsidence of the resulting precipitate may be effected, or
after having added to the sewage the requisite amount of the soluble
phosphates a base, such, for example, as lime (by preference in the form
of milk of lime), is to be added in such quantity as that the phosphates
in solution shall be precipitated. This result will be known by the
sewage acquiring a neutral or alkaline reaction, or a base, such,. for

page_text: with a base, such as lime or carbonate of lime, for the treatment of
sewage, substantially in the manner herein-before described.
In witness whereof, I, the said Astley Paston Price, have to this
my Specification set my hand and seal, this Fourth day of
November, One thousand eight hundred and seventy.