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 5.Particulars as to the working of the Septic Tanks.

No.Name of town or district.Name or number of tank.Dates between which the tank was in use.Length of time during which the tank was used.Rate of flow of sewage through the tank.Quantity of sewage passed into the tank.Quantity of sludge left in the tank.Percentage of moisture in the eludge left in the tank.Percentage reduction in the amount of sludge effected by septic action.
Weeks.Gallons per day.Gallons.Tons.
1Accrington6 Open15 months' continuous use...1,250,000 (dry weather flow)......76.7
6Birmingham1 to 20In use constantly10422,000,000...None...*
7Blackburn1 2...104240,000•••...90.72. of the suspended solid matter.
8Bloxwich district of Walsall
9Bristol— At KnowleJanuary, 1900 to March, 1902...39,000
At St. John's-lane...1,600

* The sludge which hail to be disposed of before septic tanks were used amounted to double that which is now to be
removed from the sedimentation tanks.