Partial nitritation and o-cresol removal with aerobic granular biomass in a continuous airlift reactor
Jemaat, Zulkifly (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Suárez Ojeda, María Eugenia (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Pérez Cañestro, Julio (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Carrera, Julian (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Data:	2014
Resum:	Several chemical industries produce wastewaters containing both, ammonium and phenolic compounds. As an alternative to treat this kind of complex industrial wastewaters, this study presents the simultaneous partial nitritation and o-cresol biodegradation in a continuous airlift reactor using aerobic granular biomass. An aerobic granular sludge was developed in the airlift reactor for treating a high-strength ammonium wastewater containing 950+/-25 mg N-NH⁺₄ L⁻¹. Then, the airlift reactor was bioaugmented with a pnitrophenol-degrading activated sludge and o-cresol was added progressively to the ammonium feed to achieve 100 mg L⁻¹. The results showed that stable partial nitritation and full biodegradation of o-cresol were simultaneously maintained obtaining a suitable effluent for a subsequent anammox reactor. Moreover, two o-cresol shock-load events with concentrations of 300 and 1000 mg L⁻¹ were applied to assess the capabilities of the system. Despite these shock load events, the partial nitritation process was kept stable and o-cresol was totally biodegraded. Fluorescence in situ hybridization technique was used to identify the heterotrophic bacteria related to o-cresol biodegradation and the ammonia oxidising bacteria along the granules.
Ajuts:	Ministerio de Economía y Competitividad CTQ2011-24745/PPQ Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-815
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Nitritation ; Industrial wastewater ; Phenolic compounds ; Aerobic granules
Publicat a:	Water research, Vol. 48 (Jan. 2014) , p. 354-362, ISSN 0043-1354

DOI: 10.1016/j.watres.2013.09.048

Post-print 37 p, 1.7 MB

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