Disposal and purification of factory wastes or manufacturing sewage / by H. W. Clark.

Date:
1910
Catalogue details

Licence: In copyright

Credit: Disposal and purification of factory wastes or manufacturing sewage / by H. W. Clark. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    Average Analysis of Liquor applied to Filter No. 61. [Parts per 100,000.] Ammonia. Chlorine. Nitrogen as — Oxygen Consumed. Bacteria per Cubic Centimeter. Free. Albuminoid. Nitrates. Nitrites. 17.30 43.10 60.13 .0000 .0000 232.00 - Average Analysis of Effluent from Filter No. 61. 8.30 47.00 .2800 .0000 90.00 Filters Nos. VI. and VII. — Filter No. VI. contained 60 inches in depth of sand of an effective size of 0.25 millimeter, and Filter No. VII. contained the same depth of coke breeze. To these two filters the efflu- ent from Filter No. 61 was applied at an average rate of 50,000 gallons per acre daily. Each filter disposed of the applied liquor readily, but it passed through the 5 feet of filtering material with very little or no change. Average Analysis of Effluent from Filter No. VI. [Parts per 100,000.] Ammonia. Chlorine. Nitrogen as — Oxygen Consumed. Bacteria per Cubic Centimeter. Free. Albuminoid. Nitrates. Nitrites. [19.58 7.90 72.23 .2260 .0012 76.60 728,000 Average Analysis of Effluent from Filter No. VII. 21.17 8.39 54.06 .2200 .0260 76.10 472,000 Filter No. VIII. — This filter contained 5 feet in depth of sand of an effective size of 0.25 millimeter, and to it was applied the supernatant liquor resulting from removing much fat and dirt from the strong waste wool-scouring liquor when using calcium chloride as a precipitant. This treatment with calcium chloride gave an almost complete clarification of the liquor, and its strength after treatment, estimated by albuminoid ammonia determinations, was about the same as that of the effluent from Filter No. 61. Filter No. VIII. disposed of this clarified liquor readily at an average rate of 100,000 gallons per acre daily, but it passed through 5 feet of sand with very little change.