London's Pulse: Medical Officer of Health reports 1848-1972

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London County Council 1900

[Report of the Medical Officer of Health for London County Council]

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No.Name of town or district.Remarks.
37ReigateThe sewage is distributed evenly over the surface of the bed by the automatic Candy-Caink sprinkler fed by intermittent valves. Two or three minutes flow of sewage is held up in a storage chamber and then discharged through the sprinkler in about one minute so that the bed is in this way both worked and rested in an intermittently continuous manner. There is no water logging of the bed and that continuous and frequent aeration is insured, is shown by the effluent being practically saturated with dissolved oxygen.
38RochdaleThe two beds are Whittaker and Bryant's thermal aerobic filters (as at Accrington). The sewage passes through a septic tank of a capacity of 1 j days flow. The sewage from the open septic tank flows into a small tank and is then pumped up and continuously and evenly distributed over the surface of the two beds by automatically revolving sprinklers, and passes directly through the bed. The septic tank was in use too long without the sludge being cleaned out. It will be cleaned out more frequently in future.
39SalfordClarified sewage from the precipitation tanks which had passed through a roughing gravel filter was supplied to the bed by sprinkler jets making a spray or rainfall over the surface of the bed. Thus clarified sewage and air passed continuously through the filters while they were working. The roughing beds intercepted a good deal of fine mud and required cleaning out about every second day. We can fully depend upon the bacteria beds to give a satisfactory effluent even when working night and day almost without intermission.
40SheffieldThe degree of purification obtained has been uniformly satisfactory. The loss of capacity of the beds continues and experiments are being conducted with the object of reducing this as much as possible. Permanent works on bacterial principles are contemplated, but working details cannot be decided upon until further experiments are completed.
41SouthportOnly a small proportion of the sewage is treated. The beds have always worked to entire satisfaction, and they have always produced a clear and non-putrescible effluent.
42Swinton and PentleburyThe information inspecting this centre lias been obtained from the particulars published by the Borough of Walsall.
43WolverhamptonThe results from No. 1 bed were good, but, owing to the presence of iron salts in the sewage, a permanent installation is doubtful. It was necessary on account of the iron salts to add lime to the sewage before it passed into the septic tank.
45West Bromwich
46WorcesterThese beds are in use only at the Isolation Hospital. They consist of trenches filled with furnace ashes along which the sewage flows.