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

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 for 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 comparison.Average percentage purificatiom effected on the crude 6ewage, 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.Rate of flow of sewage through the tanks. Gallons per day.Name of chemical.Grains per gallon of sewage.Average percentage purification.Number of hours occupied in absorption.Temperature at Which absorption took place
Gallons.
3172.748072.6
27Leicester24 Oct. to 10 Nov., 18981 pSewage which had passed through an open detritus tank18,68130...Q\68.948074.8
11 Nov. to 26 Nov., 1898l pSewage which had passed through a closed detritus tank...(15 feet wide, 7 feet d eep)o
1 si73.948066.6
1 Sept. to 10 Nov., 1898• ••Sewage which had passed through an open detritus tank and an open settling tank........................(1 filling daily for first 12 days only)
a172.648081.1
11 Nov. to 6 Dec., 1898• ••Sewage which had passed through a closed detritus tank and an open settling tank...•••...
19.233171.248071.0
7 Dec., 1898 to 22 July, 1899• ••Sewage which had passed through a closed detritus tank.........a1
76.248065.0
24 July to 15 Sept., 1899• • •Sewage which had passed through a closed detritus tank and a closed septic tank...«• ••......
4173.548073.6
19 Sept. to 13 Oct., 1899• ••Sewage which had passed through a closed detritus tank..................
3290.248083.1
28 Nov., 1898 to 19 July, 18991pSewage which had passed through a closed detritus tank...............
3289.748079.9
20 July to 2 Sept., 1899• ••Sewage which had passed through a closed detritus tank and closed septic tank.........•. •
3389.648083.7
4 Sept. to 15 Sept., 18991 P, 1 and 2 SSewage which had passed through a closed detritus tank and closed septic tank•••............
4391.348086.7
19 Sept. to 13 Oct., 1899...Sewage which had passed through a closed detritus tank...• ••......
Alumino ferric35222232209,234
28Lincoln ......Sewage which had been chemically treated and sedimented (12 hours' settlement)No detritus tank is used
29Liverpool (West Derby Sewage Farm)June, 1899, to dateAll ...Crude sewageNo settling tank.None ...3 . 42iVaries from 2 to 81 to 3266,000 (average)

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