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Operational Aspects of Three ‘Selectors’in Relation to Aeration Tank Ecology and Stable Foam Formation
Author(s) -
FOOT R. J.,
ROBINSON M. S.,
FORSTER C. F.
Publication year - 1993
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1993.tb00849.x
Subject(s) - aeration , activated sludge , sewage , environmental science , waste management , biochemical engineering , process engineering , ecology , pulp and paper industry , environmental engineering , sewage treatment , engineering , biology
The use of ‘selectors’to control the filamentous bacteria which promote bulking in activated sludge is a well‐established concept. However, their use as a control measure for stable foams is still to be optimized. This paper presents the results of a preliminary investigation into the use of selectors at three sewage‐treatment works where stable foams occurred regularly. Chemical and biological data are reported together with the redox potentials in the selector zones. Taken overall, the results suggest that selectors cannot be designed or built on an ad hoc basis if the foam‐producing filaments are to be controlled.