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19
Sewers re-laid by the Council.
The Orchard and Bedford Road.about 287 yards.
The Steyne „ 23 „
Cunnington Street „ 80 „
Sewers laid by Contractors for the Council.
Bedford Road about 227 yards.
Mill Hill Grove „ 62 ,,
Cumberland Road „ 35 „
SEWAGE DISPOSAL.
The precipitation method of dealing with sewage is rapidly being
replaced by the bacterial treatment, by nearly all large towns.
The fallacies of our Ferrozone process are yearly becoming more
apparent. We get a very indifferent effluent, and we find the difficulties
of disposing of the sludge increasing.
With the view of testing the new bacterial treatment, an experimental
filter was started in the early part of the year.
It consists of an open septic Tank, into which the sewage is turned
without any preliminary treatment. This tank is aptly called the
digesting or liquefying chamber.
This liquefying process is brought about by the action of organisms
that do not grow in the presence of air, and an effluent is produced which
is practically without solids in suspension.
The effluent from this septic tank is then uniformly distributed
over the surface of coke or clinker, and passes out purified.
This final purification is produced by organisms that grow in the
presence of air, and also by the oxygen of the air.