London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
London County Council 1899
[Report of the Medical Officer of Health for London County Council]
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Table 7—(
| Date, 1898. | Sewage chemically treated and sedimented as supplied to the coke.bed. | Coke.bed effluent. | Quantity treated. Gallons. | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Oxygen absorbed from permanganate in four hours. | Nitrogen as | Oxygen absorbed from permanganate in four hours. | Nitrogen as | ||||||
| By the total oxidisable matter. | By the dissolved oxidisable matter. | Nitrite. | Nitrate. | By the total oxidisable matter. | By the dissolved oxidisable matter. | Nitrite. | Nitrate. | ||
| 1898. | |||||||||
| July 16 | 2.200 | Nil | Nil | 0.633 | Trace | Nil | 615,250 | ||
| 604,550 | |||||||||
| ” 18 | 1.700 | ” | ” | 0.571 | 0.0322 | 00139 | 615,250 587,330 | ||
| ” 19 | 3.000 | ” | ” | 0.663 | 0.0350 | 00226 | 649,640 369,919 | ||
| ” 20 | 2.500 | ” | ” | 0.633 | 0.0238 | 00742 | 406,600 620,326 | ||
| ” 21 | 2.700 | ” | ” | 0.633 | 0.0182 | 0.0740 | 609,900 596,285 | ||
| ” 22 | 2.276 | ” | ” | 0.630 | 0.0233 | 0 0511 | 612,755 571,982 | ||
| ” 23 | 2.178 | ” | ” | 0.540 | 00168 | 00524 | 587,642 556,400 | ||
| ” 25 | ” | 3.069 | ” | 0.0173 | 0.670 | 0.0238 | 0.0086 | 588,500 569,106 | |
| ” 26 | 3.960 | ” | Nil | 0.720 | 0.0210 | 00230 | 561,750 540,671 | ||
| ” 27 | 2.475 | ” | ” | 0.680 | 0.0210 | 00346 | 602,710 | ||
| 552,033 | |||||||||
| ” 28 | 2.574 | ” | 0.0115 | 0.600 | 0.0168 | 00230 | 572,450 535,000 | ||
| ” 29 | 3.366 | ” | Nil | 0.570 | 0.0168 | 01326 | 572,450 | ||
| 508,250 | |||||||||
| Nov. 8 | 4.950 | 3.663 | Nil | 0.0987 | 1.089 | 0.649 | 0.1190 | 1.8129* | 469,101 |
| ” 9 | 4.950 | 3.762 | ” | 0.2006 | 1.089 | 0.505 | 0.1190 | 0.8697 | 642,000 |
| ” 10 | 4.950 | 3.366 | ” | 0.1312 | 0.990 | 0.567 | 0.0700 | 0.7211 | 561.750 |
| ” 11 | 7.921 | 3.010 | ” | 0.0969 | 0.693 | 0.557 | 0.0560 | 0.5171 | 695,500 |
| ” 12 | 4.950 | 3.366 | ” | 0.1444 | 1.089 | 0.557 | 0.0840 | 0.2729 | 668,750 |
| ” 14 | 3.960 | 3.564 | ” | 0.0075 | 0.990 | 0.569 | 0.0182 | 0.7212 | 722,250 |
| ” 15 | 4.950 | 3.960 | ” | 0.0431 | 1.089 | 0.539 | 0.0182 | 0.6555 | 668,750 |
| ” 16 | 4.950 | 3.663 | ” | 0.0937 | 0.990 | 0.539 | 0.0210 | 0.5952 | 668,750 |
| ” 17 | 3.960 | 3.465 | ” | 0.1131 | 0.990 | 0.577 | Trace | 0.5562 | 668,750 |
| ” 18 | 4.950 | 3.456 | ” | 0.0525 | 0.891 | 0.547 | Trace | 0.4025 | 676,130 |
| ” 19 | 5.000 | 3.500 | ” | 0.2437 | 1.300 | 0.629 | 0.0160 | 0.2877 | 668,750 |
| ” 21 | 5.000 | 4.000 | ” | 0.0700 | 1.200 | 0.581 | 0.0140 | 0.7110 | 695,500 |
| 652,700 | |||||||||
| ” 22 | 7.000 | 5.300 | 00490 | 0.0829 | 1.200 | 0.619 | 0.0140 | 0.8385 | 625,950 |
| 642,003 | |||||||||
| ” 23 | 7.000 | 5.200 | Trace | 0.1094 | 0.700 | 0.619 | 0.0140 | 0.4347 | 636,650 |
| 631,300 | |||||||||
| ” 24 | 7.000 | 5.000 | Nil | 0.0244 | 1.500 | 0.707 | 0.0182 | 0.3687 | 597,562 |
| 615,250 | |||||||||
| ” 25 | 5.000 | 3.500 | 00350 | Lost | 1.200 | 0.535 | 0.0180 | 01937 | 674,100 |
| 636,650 | |||||||||
| ” 26 | 3.000 | 2.400 | Nil | 0.0375 | 0.900 | 0.510 | 0.0140 | 0.4754 | 636,650 |
| 631,300 | |||||||||
| ” 28 | 5.000 | 3.900 | 0.0687 | 1.000 | 0.570 | 0.0238 | 0.5549 | 663,400 | |
| 615,250 | |||||||||
| ” 29 | 5.000 | 3.900 | 00350 | Nil | 0.800 | 0.520 | 0.0210 | 0.7065 | 603,253 |
| 609,900 | |||||||||
| ” 30 | 6.000 | 4.000 | Nil | 0.0237 | 1.100 | 0.627 | 0.0210 | 0.3396 | 615,250 |
| Dec. 1 | 6.000 | 4.300 | 0.0806 | 1.000 | 0.529 | 0.0140 | 0.5672 | 688,618 | |
| ” 2 | 7.000 | 5.100 | Trace | 0.0319 | 1.100 | 0.559 | 0.0182 | 0.5593 | 655,228 |
| 630,810 | |||||||||
| ” 3 | 6.000 | 3.600 | Nil | 0.1362 | 1.300 | 0.618 | 0.0350 | 0.3394 | 574,927 |
| ” 5 | 6.000 | 5.000 | - | 1.300 | 0.702 | 0.0210 | — | 642,000 | |
| 608,964 | |||||||||
| ” 6 | 6.000 | 5.300 | 0.1606 | 1.200 | 0.635 | 0.0210 | 0.6415 | 642,000 | |
| 603,252 | |||||||||
| ” 7 | 5.000 | 3.400 | 01190 | 0.0841 | 1.000 | 0.529 | 0.0252 | 0.7494 | 574,797. |
| 580,488 | |||||||||
* This large amount of nitrate, as compared with that found on July 29th, had probably been produced
during the period of resting, and was washed out in the first effluent.