Biodegradation of a high-strength wastewater containing a mixture of ammonium, aromatic compounds and salts with simultaneous nitritation in an aerobic granular reactor
Ramos Quiroz, Carlos Antonio (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)
Carrera, Julian (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2016
Abstract:	Long-term operation (390 days) of a continuous airlift reactor with aerobic granular biomass was successfully applied to treat a highly complex wastewater composed of: ammonium (1000 mg N L⁻¹), o-cresol (100 mg L⁻¹), phenol (100 mg L⁻¹, quinoline (50 mg L⁻¹) and salts (16 g salts L⁻¹). High nitrogen loading rate (1. 1 g N L⁻¹ d⁻¹) and organic loading rate of 0. 7 (g COD L⁻¹ d⁻¹) were achieved for the simultaneous nitritation and complete biodegradation of the aromatic compounds. The successful operation of the granular airlift reactor can be related to (i) the growth of specialized microorganisms in the aerobic granules and (ii) the continuous feeding regime. Aerobic granules were maintained stable in spite of the high salinity conditions. Dissolved oxygen (DO) concentration and DO/ammonium concentrations ratio were the key parameters to select a suitable effluent for anammox or heterotrophic denitrification via nitrite. Besides, nitrous oxide emissions were related to the DO concentration in the reactor.
Grants:	Ministerio de Economía y Competitividad CTQ2011-24745/PPQ Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-815
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Partial nitrification ; Phenolic compounds ; Salinity ; Nitrous oxidea
Published in:	Process biochemistry, Vol. 51, issue 3 (March 2016) , p. 399-407, ISSN 1873-3298

DOI: 10.1016/j.procbio.2015.12.020

Post-print 30 p, 1.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > GENOCOV
Articles > Research articles
Articles > Published articles