The sewage question : comprising a series of reports being investigations into the condition of the principal sewage farms and sewage works of the kingdom / from Dr. Letheby's "Notes and chemical analyses".

  • Letheby, H. (Henry), 1816-1876.
Date:
1872
Catalogue details

Licence: Public Domain Mark

Credit: The sewage question : comprising a series of reports being investigations into the condition of the principal sewage farms and sewage works of the kingdom / from Dr. Letheby's "Notes and chemical analyses". Source: Wellcome Collection.

    24/220 (page 12)
    We took samples of sewage at its entrance upon the farm, and at its exit at two places into the river Avon, and the following are the results of the analysis of them :— Constituents per gallon. Raw sewage, EfBuent ivater. EfiSuent water VJl i. CUllS* Roli.d Tnntf.PT ioi sol.iitioii. - 36-67 37-87 38-60 Chloride of sodium 8-41 7-44 8-39 Organic matter - 12-36 9-69 11-51 Ammonia - - - 4-43 1-28 1-28 Ditto organic 0-16 0-08 0-08 Nitrogen as nitrates, &c. 0-00 0-21 0-ia Oxygen required to ) 0-92 0-42 0-63^ oxydise - - ) Matter in suspension 1-28 0-32 1-15 Organic matter - 0-64 0-13 0-58 Mineral ditto 0-64 0-19 0-57 On another occasion, when samples were taken, they yielded the following results :— Constituents per gallon. Solid matter in solution Chloride of sodium Organic matter . Ammonia . Do. organic Nitrogen as nitrates, &c, Oxygen required to oxydise Matters in suspension Organic matter . Mineral ditto . Eaw sewage. Effluent water. Grains. Grains. 43-30 36-11 6-10 2-49 3-841 0-480 0-120 0-080 0-220 0-231 0-953 0-302 9-52 0-00 4-48 0-00 5-34 0-00.