Aerobic biodegradation of a mixture of monosubstituted phenols in a sequencing batch reactor
2013; Elsevier BV; Volume: 260; Linguagem: Inglês
10.1016/j.jhazmat.2013.05.052
ISSN1873-3336
AutoresI. González Fernández, María Eugenia Suárez-Ojeda, Julio Pérez, Julián Carrera,
Tópico(s)Water Treatment and Disinfection
ResumoA 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.
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