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18
Sewerage and Sewage Disposal.
The district is divided into areas for the collection of
sewage, which is discharged by gravity into Shone ejectors;
from which it is forced by compressed air through cast iron
mains to the sewage disposal works; the power being
obtained from a pair of horizontal steam engines.
An extra pair of engines have been fixed recently to
relieve the strain on the old ones, which have been in
continual use since 1898.
The sewage disposal works are situated in Hanworth
Road, almost on the northern boundary of the district.
The sewage is delivered at the works under pressure,
and after screening, is conducted in a covered channel to
a large hydrolytic tank, where the grosser matters are
arrested.
This tank effluent is then distributed on to the primary
and—after treatment—to the secondary percolating filters of
clinker by means of two mechanically propelled travelling
distributors.
The effluent from the secondary percolating filters is
then treated in a secondary settling tank, after which it is
further purified in the fine tertiary filters.
The resulting effluent is clear and non-putrescible, and is
discharged into the River Thames below Hampton Court.
The sludge from the hydrolytic tank is buried in trenches
in the land.
Belgian Refugees.
About forty refugees were receiving hospitality in the
district at the close of the year, and this number has since
increased.