View report page

in hand for the complete renewal of the equipment at Red Lion Square, Hampton by
which the present compressed air ejector is to be replaced with electrical pumps.
The policy of constructing additional manholes where necessary on both soil and
surface water sewers has been continued as the lengths concerned are cleansed.
The sewer survey for the Twickenham area of the Borough is now completed and
the survey for the Richmond area, Town Centre northwards, is now in hand.
Work on sewer maintenance has been assisted by the purchase of a 4in. portable
sewage pump and a set of diesel engine driven winches."
" (b) Sewage Disposal
As in previous years sewage from the "Middlesex" parts of the Borough has been
successfully treated at Mogden Works, Hounslow. A high standard of effluent was
achieved throughout the year and no significant odour nuisance was reported. Adverse
weather conditions occurred frequently causing some increase in the volume of stormwater
passed to the river after settlement only, but this had no significant deleterious
effect on river water quality.
A continuing shortage of digester capacity caused some difficulties in the first half
of the year and some raw sludge had to be pumped to the Perry Oak Works, Hillingdon
without pre-treatment. This controlled the situation at Mogden but lead to some
temporary smell nuisance at the other works. Deodrant sprays were installed to control
this.
Later in the year a converted digester with improved heating and circulating
equipment was recommissioned and since that time no sludge has left Mogden Works
without pre-treatment by digestion. The new digesters under construction are now
virtually complete and are about to be commissioned. There will then be an adequate
reserve capacity available.
The installation of rising mains from Ham to Mogden, which has included an
interesting crossing of the River Thames near Eel Pie Island, is now well advanced and
the pumping station at Ham is under construction.
The Kew Works serving the "Surrey" parts of the Borough has continued to produce
a very satisfactory effluent throughout the year. This comparatively small works
coped successfully with an exceptionally high flow reaching the rate of 44 million
gallons per day on 15th September when 1.72 inches of rain fell in about 3 hours. The
comparable flow rate to the Mogden Works on that date was 520 m.g.d."
59