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High-rate anaerobic digestion of kraft mill fibre sludge by CSTRs with sludge recirculation.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Biogas Research Center. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0001-5260-1826
Linköping University, Biogas Research Center. Linköping University, Department of Thematic Studies. Linköping University, Faculty of Arts and Sciences. Scandinavian Biogas Fuels AB, Sweden.
Linköping University, Biogas Research Center. Scandinavian Biogas Fuels AB, Sweden.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Biogas Research Center. Linköping University, Faculty of Arts and Sciences.
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2016 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 56, 166-172 p.Article in journal (Refereed) Published
Abstract [en]

Kraft fibre sludge from the pulp and paper industry constitutes a new, widely available substrate for thebiogas production industry, with high methane potential. In this study, anaerobic digestion of kraft fibresludge was examined by applying continuously stirred tank reactors (CSTR) with sludge recirculation.Two lab-scale reactors (4L) were run for 800 days, one on fibre sludge (R1), and the other on fibre sludgeand activated sludge (R2). Additions of Mg, K and S stabilized reactor performance. Furthermore, theCa:Mg ratio was important, and a stable process was achieved at a ratio below 16:1. Foaming was abatedby short but frequent mixing. Co-digestion of fibre sludge and activated sludge resulted in more robustconditions, and high-rate operation at stable conditions was achieved at an organic loading rate of 4 gvolatile solids (VS) L1 day1, a hydraulic retention time of 4 days and a methane production of230 ± 10 Nm L per g VS.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 56, 166-172 p.
Keyword [en]
Pulp and paper Anaerobic digestion Sludge recirculation High-rate CSTR Fibre sludge Activated sludge
National Category
Renewable Bioenergy Research Production Engineering, Human Work Science and Ergonomics Production Engineering, Human Work Science and Ergonomics Water Engineering
Identifiers
URN: urn:nbn:se:liu:diva-131780DOI: 10.1016/j.wasman.2016.06.034ISI: 000383827700020PubMedID: 27453288OAI: oai:DiVA.org:liu-131780DiVA: diva2:1033074
Funder
Swedish Energy Agency
Note

Funding agencies: Swedish Energy Agency [32802-1]; Scandinavian Biogas Fuels AB; Poyry AB; BillerudKorsnas AB; SCA; Fiskeby Board AB; Purac AB

Available from: 2016-10-05 Created: 2016-10-05 Last updated: 2017-11-30Bibliographically approved

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The full text will be freely available from 2018-07-21 09:35
Available from 2018-07-21 09:35

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Ekstrand, Eva-MariaKarlsson, MarielleBjörn, AnnikaSvensson, Bo H.Ejlertsson, Jörgen
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Tema Environmental ChangeBiogas Research CenterFaculty of Arts and SciencesDepartment of Thematic Studies
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Waste Management
Renewable Bioenergy ResearchProduction Engineering, Human Work Science and ErgonomicsProduction Engineering, Human Work Science and ErgonomicsWater Engineering

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