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Anaerobic treatment of activated sludge from Swedish pulp and paper mills - biogas production potential and limitations
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Scandinavian Biogas Fuels AB.
Linköping University, Faculty of Arts and Sciences. Linköping University, The Tema Institute, Department of Water and Environmental Studies.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
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2011 (English)In: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 32, no 14, 1559-1571 p.Article in journal (Refereed) Published
Abstract [en]

The methane potential of activated sludge from six Swedish pulp and paper mills was evaluated. The methane production potential of sludge samples ranged from 100-200 NmL CH(4) g(-1) volatile solids (VS) and for four of the six sludge samples the potential exceeded 170 NmL CH(4) g(-1) VS. The effects of sludge age and dewatering on the methane production potential were evaluated. The effects of enzymatic and ultrasonic pre-treatment on the digestibility of sludge were also investigated, but energy or enzyme inputs in viable ranges did not exert a detectable, positive effect. Long-term, semi-continuous trials with sludge from two of the mills were also conducted in attempts to develop stable biogas production at loading rates up to 4 g VS L(-1). Cobalt addition (0.5 mg L(-1)) was here found to positively affect the turnover of acetate. High viscosity was a problem in all the experimental reactors and this limited the organic loading rate.

Place, publisher, year, edition, pages
Taylor and Francis / Selper , 2011. Vol. 32, no 14, 1559-1571 p.
Keyword [en]
activated sludge, anaerobic digestion, pre-treatment, pulp and paper industry, trace elements
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-72041DOI: 10.1080/09593330.2010.543932ISI: 000296188200003OAI: oai:DiVA.org:liu-72041DiVA: diva2:455956
Note
Funding Agencies|Swedish Thermal Engineering Research Institute (Varmeforsk)||Available from: 2011-11-11 Created: 2011-11-11 Last updated: 2017-12-08

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Karlsson, AnnaGustavsson, JennySvensson, Bo

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