Ozonation of activated sludge in the recycle stream

✍ Scribed by A Huysmans; M Weemaes; P A Fonseca; W Verstraete

• Publisher: Wiley (John Wiley & Sons)
• Year: 2001
• Tongue: English
• Weight: 107 KB
• Volume: 76
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.379

✦ Synopsis

Abstract

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