The biological foaming was related to the metabolism of certain microorganisms that synthesize and excrete hydrophobic compounds. Recently, by the attention of many researchers the biological foaming in the MBR has attracted, because MBR foam has been also observed in the absence of foam-forming microorganisms, contrarily to conventional activated sludge systems. In this paper the authors investigate the role of EPS and filamentous bacteria analyzing different samples from different MBR pilot plants. In particular, in order to define the macroscopic features and the role of EPS and filamentous bacteria a modified Scum Index (MSI) test was applied. Further a multiple classification of SI was proposed, relating to effect of EPS or filamentous bacteria. The causes of biological foaming were identified in terms of foaming potential, foam quality and quantity, basing on the modified Scum Index and Foam Power test.

Di Bella, G., Torregrossa, M., Capodici, M. (2012). Foaming in membrane bioreactor: identification of the causes. In Book of Abstracts SIDISA 2012 Sustainable Technology for Environmental Protection International Symposium of Sanitary and Environmental Engineering 9th Edition - Ab.

Foaming in membrane bioreactor: identification of the causes

TORREGROSSA, Michele;CAPODICI, Marco
2012-01-01

Abstract

The biological foaming was related to the metabolism of certain microorganisms that synthesize and excrete hydrophobic compounds. Recently, by the attention of many researchers the biological foaming in the MBR has attracted, because MBR foam has been also observed in the absence of foam-forming microorganisms, contrarily to conventional activated sludge systems. In this paper the authors investigate the role of EPS and filamentous bacteria analyzing different samples from different MBR pilot plants. In particular, in order to define the macroscopic features and the role of EPS and filamentous bacteria a modified Scum Index (MSI) test was applied. Further a multiple classification of SI was proposed, relating to effect of EPS or filamentous bacteria. The causes of biological foaming were identified in terms of foaming potential, foam quality and quantity, basing on the modified Scum Index and Foam Power test.
Settore ICAR/03 - Ingegneria Sanitaria-Ambientale
28-giu-2012
SIDISA 2012 International Symposium of Sanitary and Environmental Engineering 9th Edition
Milano
26/29 Giugno 2012
2012
8
Di Bella, G., Torregrossa, M., Capodici, M. (2012). Foaming in membrane bioreactor: identification of the causes. In Book of Abstracts SIDISA 2012 Sustainable Technology for Environmental Protection International Symposium of Sanitary and Environmental Engineering 9th Edition - Ab.
Proceedings (atti dei congressi)
Di Bella, G; Torregrossa, M; Capodici, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/66155
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