An analysis of the bacterial community in a membrane bioreactor fed with photo-Fenton pre-treated toxic water

M. M. Ballesteros Martín, L. Garrido, J. L. Casas López, O. Sánchez, J. Mas, M. I. Maldonado, J. A. Sánchez Pérez

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Resumen

A photo-Fenton-membrane bioreactor (MBR) coupled system is an innovative tool for the treatment of wastewater containing high quantities of contaminants. In this paper, wastewater with 200 mg l -1 of dissolved organic carbon (DOC) of a selected mixture of five commercial pesticides: Vydate ®, Metomur ®, Couraze ®, Ditimur-40 ®, and Scala ® was treated by combining photo-Fenton and MBR. The effect of photo-treated pollutants on MBR operation was investigated by studying the population changes that occurred with time in the activated sludge of the biological system. Pre-treatment with photo-Fenton was carried out (only up to 34% of mineralization of DOC) and, after MBR treatment, 98% of biodegradation efficiency was obtained. During the biological treatment, little changes in the activated sludge population were detected by DGGE analysis, maintaining acceptable biodegradation efficiency, which points out the robustness of the MBR treatment versus changes in feed composition. © 2010 Society for Industrial Microbiology.
Idioma originalInglés
Páginas (desde-hasta)1171-1178
PublicaciónJournal of Industrial Microbiology and Biotechnology
Volumen38
N.º9
DOI
EstadoPublicada - 1 sept 2011

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