Investigations on the purification of Boston sewage made at the sanitary research laboratory and sewage experiment station of the Massachusetts institute of technology, with a history of the sewage-disposal problem / By C.E.A. Winslow and Earle B. Phelps.

  • Charles-Edward Amory Winslow
Date:
1906
Catalogue details

Licence: In copyright

Credit: Investigations on the purification of Boston sewage made at the sanitary research laboratory and sewage experiment station of the Massachusetts institute of technology, with a history of the sewage-disposal problem / By C.E.A. Winslow and Earle B. Phelps. 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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    Table XXXV.—Results of double and single contact treatment at Manchester, England {Manchester, 1904 o). [Parts per million.] Septic effluent First contact Second contact Septic effluent Single contact (one-halt rate) Nitrogen as- Oxygen consumed in 4 hours at 80° F. Free ammonia. Albuminoid ammonia. Nitrates and nitrites. 2.). 8 14.5 4.1 31 13.3 2.5 1.2 .5 3.5 1.3 70 22 6.9 80 10 0.5 8.5 4.3 In the Hamburg experiments it was found that with six daily fill- ings in the primary bed and three in the secondary bed as good results were obtained by double contact as with two fillings in single-contact RAW SEWAGE PRIMARY EFFLUENT SECONDARY EFFLUENT Fig. 7.—Comparison of sewages and effluents from contact beds. beds. This is shown in Table XXVIII (p. 61), where experiment C and experiments L and D represent comparable conditions (Dunbar and Thumm, 1902). It may be noted in passing that m England gen- eral practice reverses this relation between primary and secondary beds The Manchester commission suggested that secondary beds