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is gradually being got over by laying separate surface water
drains, and it is hoped that in a year or two a double system
may be in force throughout the Borough. Manholes are being
made over all sewers so that they can be readily cleaned out.
This work has now been completed in all the main thoroughfares.
The house drains in modern property are in good
condition. Many of the older houses have been brought into
accord with the By-laws and opportunity is taken from time
to time to get this done. Some trouble arises from the
system of combined drains in certain districts. It is to be
hoped that the law on this matter will be amended shortly,
so that the present difficulties may be done away, thus
obviating expensive law processes.
The sewage on arrival at the works is deodorized before
pumping by mixture with Charcoal and Clay. It is then
precipitated with Sulphate of Aluminia, manufactured on the
Works, in eight large settling tanks and is then conveyed
through percolating filters before discharge into the Thames.
The tank capacity is 1,200,000 gallons, and the filter
capacity 7,566 cubic yards.
The average daily flow from Kingston (pop. 39,000) and
Hampton Wick (pop. 4,000) is about 1,640,000 gallons, equal
to 39 gallons per head of population.
The sludge from the tanks is pressed. The treatment
is known as the A.B.C. and at the works are under the sole
control of the Corporation. The sludge is barged away by
the Native Guano Co. who complete the process elsewhere.
Dr. Gilbert Fowler, of Manchester, describes the Kingston
effluent as "perhaps the most brilliant clarified effluent produced
in this country."