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Short hydraulic retention time in methane production from sewage sludge hydrolysate using anaerobic moving-bed biofilm reactors (AnMBBR) under thermophilic and mesophilic conditions
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-2325-5703
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering. AnoxKaldnes – Veolia Water Technologies AB, Klosterängsvägen 11A, Lund 226 47, Sweden.ORCID iD: 0000-0002-3463-1148
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
2024 (English)In: Journal of Environmental Chemical Engineering, E-ISSN 2213-3437, Vol. 12, no 5, article id 113766Article in journal (Refereed) Published
Abstract [en]

The use of anaerobic moving-bed biofilm reactors was investigated for biogas production from the liquid fraction of sewage sludge hydrolysate. Anaerobic digestion requires traditionally long retention times due to the slow growth of methanogens. This work investigated biogas production with 2–3 days retention time under mesophilic (37°C) and thermophilic (50°C) conditions. Two continuous reactors were operated to treat the liquid fraction of hydrolysate sewage sludge for 196 days. The mesophilic reactor showed a more stable performance compared to the thermophilic one. The mesophilic reactor kept the soluble COD removal above 80 % at a volumetric loading rate (VLR) above 7 g COD L−1 d−1, and specific surface loading rate (SARL) above 20 g SCOD m−2 d−1. In contrast, the thermophilic reactor displayed a soluble COD removal above 80 % at an average VLR of 4.2 g COD L-1 d-1, and average SARL of 14 g SCOD m−2 d−1. The biogas from both systems contained 73 % methane. The microbial analysis of the biofilm showed that 36 % of the viable cells were anaerobic microorganisms.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 12, no 5, article id 113766
Keywords [en]
Anaerobic MBBR, Sewage sludge, Anaerobic digestion, Biogas, Biofilm, Carriers
National Category
Industrial Biotechnology Biological Sciences Environmental Biotechnology
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-109993DOI: 10.1016/j.jece.2024.113766ISI: 001309074000001Scopus ID: 2-s2.0-85203176360OAI: oai:DiVA.org:ltu-109993DiVA, id: diva2:1898451
Note

Validerad;2024;Nivå 2;2024-09-17 (sofila);

Full text license: CC-BY 4.0

Available from: 2024-09-17 Created: 2024-09-17 Last updated: 2024-11-20Bibliographically approved

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Niero, LuisaMorgan-Sagastume, FernandoPelkonen, MarkkuLagerkvist, Anders

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