Year: 1895

page_text: Date of Application, 13th June, 1895
Complete Specification Left, 13th Mar., 1896-Accepted, 25th Apr., 1896

page_text: An Improved Means for Treating Sewage and the like.
We, JOHN JAMES HOOD, and ALFRED GORDON SALAMON, both of
1 Fenchurch Avenue, in the City of London, Chemists, 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 :-
Our invention relates to a means of treating sewage and the like so as to
deodorize or disinfect it that is to say of treating foul smelling organic substances
such as exist in excreta and decaying animal and vegetable matter so as to destroy
the effluvia and noxious gases that arise therefrom. It is specially suited for use
in hospitals and sick rooms and where the dry closet system of sanitation is
employed.
By our invention we treat the sewage or other foul smelling organic matters
with a substance derived from what is commonly known as Weldon mud which is a
mixture of calcium chloride, water and compounds or mixtures of oxides of
manganese and calcium.
-
For the purpose of our invention we take Weldon mud and we remove from it
the chloride of calcium. We then dry the remainder carefully till it assumes the
form of a fine dry powder in which state however it still contains a large amount
of water. When it assumes this form its composition is approximately
-
In order to carry out our invention in the most effective way we further dry
this powder (preferably by exposing it in thin layers to the air) until it has lost
about one third of its water. The remainder is probably in the form of water of
constitution. In this state it is in a very fine state of division and is highly
absorptive of gases. It is also a powerful oxidyser and it is doubtless owing to
these two qualities that we are able to obtain the results which our treatment
gives.
In the case of dry closets or the like it is sufficient to powder the material
over the matters to be deodorized or in some other convenient way to bring it
into intimate contact with them. It will then destroy the effluvia proceeding
from them in a most remarkable and novel way and to an extent hitherto
unattainable.
We have described above the best method of preparing the substance to be used
in treatment by our invention. But we can dispense with air-drying if desired and
can even work with the substance in a wet state. It can thus be used for all forms
of sewage.
We may modify its composition according to the manner in which minor points
in its manufacture are carried out. For instance. we may modify the amount of
CaO or MnO relative to each other or to the MnO, or we may debase the mud
i.e. take out the bases CaO and MnO or we may prepare the mud from ferruginous
manganese ores so as to contain iron oxide together with manganese oxides.
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 treatment of sewage and fæcal and like offensive matter to deodorise or
disinfect the same by means of Weldon mud in the forns herein described.

page_text: 2. The preparation of Weldon mud substantially as described to adapt it for use
as a deodorant and oxidiser for the treatment of sewage and the like.
Dated this Twelfth day of March 1896.
JOHN JAMES HOOD.
ALFRED GORDON SALAMON.