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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IV.—TABULATION OF THE RESULTS OF THE CHEMICAL EXAMINATION OF THE CRUDE SEWAGE, OF THE "CHEMICAL" EFFLUENT, AND OF THE

VARIOUS COKE- BED EFFLUENTS.

Date.Average daily crude sewage.Effluent from the chemically treated and sedimented sewage as supplied to the coke-bed ("chemical" effluent).Effluent from the coke-bed.
Oxygen absorbed from permanganate in 4 hours at 80° F.Oxygen absorbed from permanganate in 4 hours at 80° F.Oxygen absorbed from permanganate in 4 hours at 80° F.Quantity of effluent from the chemically treated and sedimented sewage which was passed on to the coke-bed per month. Gallons.Number of times the coke-bed was filled per month.Average quantity of effluent which was passed on to the bed each time of filling.
By the crude liquid. (Total putrescible matter.)By the clear liquid. (Dissolved putrescible matter.)By the crude liquid. (Total putrescible matter.)By the clear liquid. (Dissolved putrescible matter.)Nitrous nitrogen.Nitric nitrogen.By the crude liquid. (Total putrescible matter.)By the clear liquid. (Dissolved putrescible matter.)Nitrous nitrogen.Nitric nitrogen.
1900.
January11.1455.5266.6294.9570.05550.14300.8900.7230.03300.760523,356,36152449,161
February11.0095.2996.7355.1340.12710.09070.8980.7530.03621.086818,400,44246400,010
March11.9106.6587.5266.0740.05670.09360.9980.8660.03521.007118,354,93652352,980
April12.0726.5527.7816.4090.01810.02341.0860.9340.04391.202114,391,84742342,663
May12.1236.2396.6785.022NilNil0.9720.8400.04440.949017,015,41152327,219
June11.4414.9406.0184.3550.00220.00300.9390.7600.05420.905313,792,52343320,756
July10.8484.6636.1364.203Nil0.02350.9990.7920.05010.600716,002,66950320,053
August10.9894.7197.0193.974Nil0.09701.0100.8080.05020.845812,168,14738320,214
September11.3845.0146.9975.106NilNil1.0290.8400.09911.235315,823,34846343,986
October11.3825.2477.3775.9420.00040.03771.0190.8480.06911.307818,044,05152347,001
November12.0565.7667.4176.1750.0015Nil1.1310.9790.07431.302316,025,91846348,390
December12.2815.9087.9896.6500.02760.09351.0830.9420.06081.334715,630,44044355,237
Average for the year11.5465.5437.0155.3440.02450.05041.0030.8400.05411.0429199,006,093563353,474
1901.
January12.4406.5798.0106.7850.03670.10201.0230.9190.06261.177618,413,04652354,097
February13.0367.5117.3506.2420.03580.15061.1611.0550.08721.309516,121,82746350,474
March12.6846.5577.7606.5730.05630.07551.1261.0390.07011.329816,924,07050338,481
April11.8655.9927.7056.2780.02300.00541.1231.0110.10041.111715,481,72446336,559
May11.7455.8987.3665.9270.00360.00901.1581.0290.11760.628316,558,40750331,168
June11.6515.3937.1665.456NilNil1.1611.0100.10160.786216,012,55048333,595
July10.8974.7805.8474.2480.0081Nil1.0210.8560.07180.725316,889,95051331,175
August10.5784.5015.9213.965NilNil1.0090.8450.07100.679715,972,68448332,764
September10.5774.5166.3374.336NilNil0.9140.7900.06371.098611,751,01235335,743
October11.7035.6157.4315.3760.0023Nil0.9100.7900.06850.666314,976,51645332,811
November12.1356.2827.7325.8410.00980.01540.9520.8210.05250.825916,405,22150328,104
December12.2196.3517.9116.4100.04560.05230.9730.8610.07411.164114,612,64044332,105
Average for the year11.7935.8257.2195.6490.01860.03461.0450.9200.07820.9513190,119,647565336,495
Average percentage purification effected on the "chemical" effluent by the bacterial treatment during 190085.784.3
,, ,, ,, ,,190185.583.7
,, ,, ,, ,,1900-185.684.0
Average percentage purification effected on the crude sewage by the chemical and bacterial treatments combined during 190091.384.9
,, ,, ,, ,,190191.184.2
,, ,, ,, ,,1900—191.284.5