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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Table 2. Particulars as to the working of the Bacteria Beds.

No.Name of town or district.Time during which the beds were in use.Name or number of the bed used.Character of the liquid supplied to the beds.Particulars of the settling and of the detritus tanks.Chemicals used foe treating the sewage previous to bacterial treatment.Number of hoursNumber of fillings per 24 hours.Number of contacts in successive beds.Quantity of sewage treated in 24 hours, per acre of bed, one foot deep. Calculated for the purpose of comparisonAverage percentage purification effected on the crude sewage, as measured by the relative quantities of
Oxygen absorbed by the crude sewage and by the final bacteria bed effluent.Albuminoid ammonia present in the crude sewage and in the final bacteria bed effluent.
Occupied in filling the beds.During which the beds remained full (contact period).Occupied in emptying the beds.During which the beds remained empty (aeration period).
Capacity. Gallons.Length. Feet.Kate of flow of sewage through the tanks. Gallons per day.Name of chemical.Grains per gallon of sewage.
Gallons.Average percentage purification.Number of hours occupied in absorption.Temperature at which absorption took place ° F.
18EveshamBeds not yet completed1/6 of daily flowNoneused
19Glasgow...Open septic tank effluent derived from crude sewage which contains a large quantity of trades' effluent of a variable nature.........None...½2l2 to 31 to 3236,814 One filling daily9548090.6
20Haslingden, Rawten-stall and Bacup...Sewage which had been screened and which had passed through a septic tank1,825,000 (4 tank180 s each 601,825,000 feet wide)......3 Partly meth1 on the odl contin14 uous2......86 79.6 (Both are cal on the tank e4 4 figures culated septic ffluent)80 8090 871
21Hey wood...Sewage from septic tank Sewage which had been chemically precipitated160