Improvements in or relating to the Treatment and Purification of Sewage and other Polluted Waters and Liquids.
Year: 1897

page_text: Date of Application, 9th June, 1897
Complete Specification Left, 28th Jan., 1898-Accepted, 7th May, 1898
PROVIDIONAL
Improvements in or relating to the Treatment and Purification of
Sewage and other Polluted Waters and Liquids.
We, WALTER JOHN LOMAX, of 11, Fold Street, Bolton, Civil Engineer, and
THOMAS ASPINALL, of Woodland Cottage, Farnworth, near Manchester, Analytical
Chemist, both in the County of Lancaster, do hereby declare the nature of our
said invention to be as follows:
This invention relates to the treatment and purification of sewage and other
polluted waters and liquids which we effect by treating or mixing the same-in
the first instance-with lime or other suitable chemicals or precipitants. After
the sewage or other polluted waters or liquids have been thus treated it is proposed
to discharge therein chlorine gas or its equivalent from any suitable or convenient
source in the necessary or requisite quantities according to the nature and quality
of the sewage, polluted waters or liquids. If desired this system of treatment may
be performed with chlorine gas without the addition of the before mentioned
chemicals.
300
EDMUND CHADWICK,
Agent.
Improvements in or relating to the Treatment and Purification of
Sewage and other Polluted Waters and Liquids.
We, WALTER JOHN LOMAX, of 11, Fold Street, Bolton, Civil Engineer, and
THOMAS ASPINALL, of Woodland Cottage, Farnworth, near Manchester, Analytical
Chemist, both in the County of Lancaster, do hereby declare the nature of our
said 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 relates to the treatment and purification of sewage and other
polluted waters and liquids which we effect by treating or mixing the same in the
first instance with lime, carbonate of lime, spent lime, or other suitable chemicals
or precipitants. After the sewage or other polluted waters or liquids have been
thus treated it is proposed to discharge therein-in any convenient manner-
chlorine gas or its equivalent, such as, iodine or bromine, from any suitable or
convenient source in the necessary or requisite quantities according to the nature
and quality of the sewage, polluted waters or liquids. If desired this system of

page_text: treatment may be performed with chlorine gas without the addition of the before-
mentioned chemicals.
In order that our invention may be clearly understood we beg to state that the
amount of lime and chlorine to be employed will vary considerably according to
the nature and strength of the sewage to be treated and also the degree of purifi-
cation required in any particular case. However, to enable the same to be clearly
carried into practical operation we have found that treating sewage with lime and
chlorine that the following quantities will suffice; say, 500 to 4000 pounds of lime
per-million gallons, and 1 to 10 grains of chlorine per-gallon.
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 is:-
1. The process of treating and purifying sewage and other polluted waters and
liquids by means of chlorine gas or its equivalent, such as, iodine or bromine in
necessary or requisite quantities according to the nature and quality of the same,
substantially as described.
2. The process of treating and purifying sewage and other polluted water and
liquids by means of chlorine gas or its equivalents, such as, iodine or bromine,
in combination with lime or any of the before mentioned chemicals or precipitants,
substantially as described.
Dated the 27th January 1898.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.