Main drainage and sewage disposal works proposed for New York City : reports of experts and data relating to the harbor / Report of the Metropolitan sewerage commission of New York ... April 30, 1914.

  • New York (N.Y.). Metropolitan Sewerage Commission
Date:
[1914]
Catalogue details

Licence: Public Domain Mark

Credit: Main drainage and sewage disposal works proposed for New York City : reports of experts and data relating to the harbor / Report of the Metropolitan sewerage commission of New York ... April 30, 1914. Source: Wellcome Collection.

    771/806 (page 731)
    TABLE CXLIV CONSUMPTION OF DISSOLVED OXYGEN ON INCUBATING MIXTURES oF 20 Per Cent. RAW SEWAGE AND 20 Prer CENT. SETTLED SEWAGE WITH AERATED HARBOR WATER Source of Dissolved Oxygen Raw Sewage Settled Sewage Date of : Collection Deg. Sewage Harbor Water 1913 MN ee hie | te pat re 60 Initial | fine Oct. 21 |Delancey street, | |East river, Pier ae corner Pitt.. j } NOUS. t eee. ce 4 “ie 61 10 hours 60 12 hours TABLE CXLV CONSUMPTION OF DISSOLVED OXYGEN ON INCUBATING MIXTURES OF 20 PER CENT. RAW SEWAGE AND 20 PER CENT. SETTLED SEWAGE WITH AERATED HARBOR WATER Source of Dissolved Oxygen : Raw Sewage Settled Sewage Date of Aver. tei caake cies Sees sites Collection Temp. After Harbor Water | Deg. F. | Standing C.c Per Per C.c Per Per ee Fak ae oe Sere eee * fe) atura- | 7‘: fo) atura- Litre | thitiall tion | Me |tnitial| tion 1913 Initial | 5.68 | 100 90 5.93 | 100 95 Oct. 23 |Delancey,near Pitt eet river, aa 61 ae eS pa ute ree 7 ne O. y feeeseeee 6 hours | 3.28] 57 | 54 |2.95| 49 48 12hours| .05| 0.7] 0.6] 0.51] 10 8 The data given in Tables CXLIII, CX LIV and CXLV show that the raw and set- tled sewage consumed all the oxygen in the harbor water within 12 hours, and that the raw sewage used up the dissolved oxygen more rapidly than did settled sewage during the first two hours. CONSUMPTION OF OXYGEN IN MIXTURES OF HARBOR WATER WITH 5 PER CENT. OF RAW AND 5 PER CENT. OF SETTLED SEWAGE The large amount of organic matter introduced when 20 per cent. of sewage was added to the harbor water exhausted the oxygen rapidly. As the proportion of sewage