Home > Articles > Published articles > Aerobic biodegradation of a mixture of monosubstituted phenols in a sequencing batch reactor |
Date: | 2013 |
Abstract: | A sequencing batch reactor (SBR) was inoculated with p-nitrophenol-degrading activated sludge to biodegrade a mixture of monosubstituted phenols: p-nitrophenol (PNP), PNP and o-cresol; and PNP, o-cresol and o-chlorophenol. Settling times were progressively decreased to promote biomass granulation. PNP was completely biodegraded. The PNP and o-cresol mixture was also biodegraded although some transitory accumulation of intermediates occurred (mainly hydroquinone and catechol). o-Chlorophenol was not biodegraded and resulted in inhibition of o-cresol and PNP biodegradation and complete failure of the SBR within a few days. The biomass had very good settling properties when a settling time of 1 min was applied: sludge volume index (SVI₅) below 50 mL g⁻¹, SVI₅/SVI₃₀ ratio of 1 and average particle size of 200 μm. |
Grants: | Ministerio de Economía y Competitividad CTQ2011-24745/PPQ Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-815 |
Rights: | Tots els drets reservats. |
Language: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Subject: | Aerobic biodegradation ; P-nitrophenol ; O-chlorophenol ; O-cresol ; Sequencing batch reactor |
Published in: | Journal of hazardous materials, Vol. 260 (Sep. 2013) , p. 563-568, ISSN 1873-3336 |
Post-print 23 p, 1.0 MB |