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Biological treatment of fatty acid and nitrogen derivative waste water
Author(s) -
Harp Emile F.
Publication year - 1975
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02641426
Subject(s) - effluent , chemical oxygen demand , aeration , biochemical oxygen demand , chemistry , environmental science , wastewater , pulp and paper industry , sewage treatment , nitrogen , liter , hexane , waste management , environmental engineering , biology , organic chemistry , engineering , endocrinology
Armak Company’s McCook, Ill., plant has installed an aerobic biological treatment system to handle a portion of its waste water flow prior to discharge to a municipal treatment plant operated by the Metropolitan Sanitary District of Greater Chicago. The waste includes a mixture of animal and vegetable fats and oils, fatty acids, nitrogen derivatives of fatty acids, and miscellaneous organic chemicals. The purpose of the treatment system is to reduce fats, oils, or greases as measured by a hexane soluble test to below 100 mg/liter, as required by Metropolitan Sanitary District ordinance. The biological treatment system achieved an average reduction of 92% in hexane solubles and an 82% reduction in chemical oxygen demand during the reporting period, when incombing hexane solubles average 760 mg/liter, and chemical oxygen demand average 4800 mg/liter. The hydraulic flow during this same period average 320,000 gpd. Odors associated with the operation required covering the aeration basins and treating the effluent air.