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Main Sewerage Board which deals with sewage from the Barnes and Richmond areas
have also been taken over by the Greater London Council.
b) The sewage from Twickenham, Teddington and Hampton is conveyed through
trunk sewers now under the control of the Greater London Council for treatment at
the Mogden Works, Hounslow.
This plant, serving as it does the whole of the West Middlesex area, receives an
average daily flow of 90 million gallons of sewage. Originally constructed between
1931 and 1936, when it was the largest and most advanced of its kind in the world,
the works were extended between 1954 and 1961 mainly to counter the deleterious
effects on purification of synthetic detergents.
The contributing population is now about 1,400,000 and increasing water con
sumption, now over 50 gallons per head per day, impurity loading and the changing
effects of new synthetic detergents, have caused temporary overloading of some parts
of the plant during the last 2 years. This has resulted in periodic smell nuisance, which
has been particularly evident in the northern parts of Twickenham.
The emergency measures adopted by the G.L.C. have resulted in a gradual im
provement in this respect and a programme of constructional work and installation of
additional equipment costing nearly £1,000,000 is now in progress. This new plant
is designed to give a reasonable margin of spare capacity throughout the works, and
should ensure that the odour problem is progressively eliminated.
Work recently completed includes: —
1) the construction of 24 acres of new sludge drying beds.
2) the construction of sludge storage lagoons of about 90 million gallons capacity.
3) the removal of 120,000 cu. yds. of consolidated sludge from the site.
Work proceeding, and intended to be completed during the next 3 years,
includes: —
a) further sludge drying beds;
b) the provision of further sludge storage capacity;
c) additional sludge pumping equipment;
d) additional air blowing equipment;
e) improvements to existing sludge digestion plant;
f) additional sludge digestion tanks — construction to commence March, 1966;
g) additional sedimentation tanks — construction planned to commence during
1966.
REFUSE DISPOSAL
(a) Mr. Knolles also reports: —
Refuse Disposal is now a function of the Greater London Council, but the Council
have administered the Transfer Station at Barnes and the Twickenham Incineration
Plant since 1st April, 1965 by agreement with the Greater London Council.
Both plants have operated satisfactorily during the year, but the continued bulking
of the refuse has given concern at the Twickenham plant, where a night shift has been
instituted to reduce the amount of crude refuse sent direct to the tip.
Work has commenced on the installation of a Trade Waste incinerator at the
Twickenham plant to deal with furniture and other bulky items received at the works.
The Greater London Council will be assuming full control of refuse disposal for
the Borough as from 1st July, 1966.
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