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Bulking in aerobic biological systems treating dairy processing wastewaters
Author(s) -
Donkin M J
Publication year - 1997
Publication title -
international journal of dairy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.061
H-Index - 53
eISSN - 1471-0307
pISSN - 1364-727X
DOI - 10.1111/j.1471-0307.1997.tb01740.x
Subject(s) - aeration , activated sludge , anoxic waters , wastewater , sequencing batch reactor , sludge bulking , pulp and paper industry , waste management , chemical oxygen demand , anaerobic exercise , environmental science , settling , chemistry , bioreactor , environmental engineering , biology , environmental chemistry , engineering , physiology , organic chemistry
The aerobic biological treatment of dairy processing wastewaters is associated with poor sludge settling bulking, and this has been largely linked to the high soluble organic component in these wastewaters, and high chemical oxygen demand COD: NP ratios. Strategies to minimize sludge bulking in activated sludge systems or sequencing batch reactors have been identified and include the operation of these systems under extended aeration conditions, and the incorporation of an anaerobic or anoxic zone to facilitate the degradation of the readily metabolized lactose in the wastewater. Filamentous bacteria linked with sludge bulking in the industry have been associated with various operating conditions.