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Ozonation of activated sludge in the recycle stream
Author(s) -
Huysmans A,
Weemaes M,
Fonseca P A,
Verstraete W
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.379
Subject(s) - ozone , activated sludge , effluent , waste management , chemistry , pulp and paper industry , environmental science , sewage treatment , environmental engineering , engineering , organic chemistry
Intermittent ozonation of a part of the recycle sludge was performed two times a week for a laboratory‐scale reactor at an average ozone dose of 0.019 g O 3 (gSS ozonated ) −1 . Under these conditions a decrease of about 50% in sludge growth was obtained for the ozone‐treated system, in comparison with the control. As a consequence less sludge had to be removed from the test reactor. Only a slight decrease in quality of effluent was noticed. A comparative cost calculation was made, based on these results, between an ozone‐treated activated sludge system and a traditional activated sludge system. © 2001 Society of Chemical Industry