Long term operation of a thermophilic anaerobic reactor : process stability and efficiency at decreasing sludge retention time
Ferrer, Ivet (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyeria Industrial de Barcelona)
Vázquez Lima, Felícitas (Universitat Autònoma de Barcelona. Institut de Biotecnologia i de Biomedicina "Vicent Villar Palasí")
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2009
Abstract:	The aim of this study was to evaluate the performance of thermophilic sludge digestion at decreasing sludge retention time (SRT) and increasing organic loading rate (OLR), in terms of methane production, effluent stabilisation, hygienisation and dewaterability. Focus was put on determining indicators to help prevent process failure. To this end, a lab-scale reactor was operated for nearly 2 years at 55 °C. Methane production rate was increased (from 0. 2 to 0. 4-0. 6 m³CH₄ m⁻³reactor d⁻¹) by decreasing the SRT from 30 to 15-10 days, while increasing the OLR from 0. 5 to 2. 5-3. 5 kg VS m⁻³reactor d⁻¹. Sludge dewaterability was worsened at SRT below 15 days; while pathogen destruction was always successful. The following concentrations might be used to prevent process failure: VFA C2-C5 (3. 7 g COD L⁻¹), acetate (0. 6 g L⁻¹), acetate/propionate (0. 5), intermediate alkalinity (1. 8 g CaCO₃ L⁻¹), intermediate/partial alkalinity (0. 9), intermediate/total alkalinity (0. 5), CH₄ in biogas (55%).
Grants:	Ministerio de Ciencia y Tecnología REN2002-00926/TECNO
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Biogas ; Biosolids ; Dewaterability ; Hygienisation ; Wastewater
Published in:	Bioresource technology, Vol. 101, Issue 9 (May 2019) , p. 2972-2980, ISSN 0960-8524

DOI: 10.1016/j.biortech.2009.12.006

Pre-print 35 p, 976.0 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Biotecnologia i de Biomedicina (IBB)
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > Composting Research Group (GICOM)
Articles > Research articles
Articles > Published articles