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Comparative study of industrial-scale high-solid biogas production from food waste: Process operation and microbiology
Linköping University, Biogas Research Center. Linköping University, Faculty of Arts and Sciences. Swedish Univ Agr Sci, Sweden.
Swedish Univ Agr Sci, Sweden.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences. Linköping University, Biogas Research Center. Swedish University of Agricultural Sciences, Uppsala.
2020 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 304, article id 122981Article in journal (Refereed) Published
Abstract [en]

Anaerobic high-solid treatment (HST) for processing food waste and biogas production is a viable technology with considerable commercial potential. In this study, we examined and compared mesophilic and thermophilic industrial-scale plug-flow digesters. The HSTs demonstrated reasonable biogas yields from food waste (0.4-0.6 Nm(3)CH(4)/kg volatile solids). However, during operation at thermophilic conditions ammonia inhibition (similar to 2 g NH3-N/L) and acid accumulation (6-14 g/L) caused severe process disturbance. Microbial community structures diverged between the processes, with temperature appearing to be a strong driver. A unique feature of the thermophilic HSTs was high abundance of the uncultivated Clostridia group MBA03 and temperature fluctuations in one mesophilic HST were linked to drastically decreased abundance of methanogens and relative abundance of Cloacimonetes. The process data obtained in this study clearly demonstrate both potential and challenges in HST of food waste but also possibilities for management approaches to tackle process imbalance and restore process function.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 304, article id 122981
Keywords [en]
Anaerobic digestion organic fraction of municipal solid waste; Full-scale dry digestion; Plug-flow reactors; Temperature
National Category
Bioenergy
Identifiers
URN: urn:nbn:se:liu:diva-164852DOI: 10.1016/j.biortech.2020.122981ISI: 000518852900017PubMedID: 32088624Scopus ID: 2-s2.0-85079848389OAI: oai:DiVA.org:liu-164852DiVA, id: diva2:1417704
Note

Funding Agencies|Swedish University of Agricultural Sciences; Linkoping University; Energiforsk [BfS2030]; Biogas Research Center; Swedish Energy AgencySwedish Energy Agency [35624-3]

Available from: 2020-03-30 Created: 2020-03-30 Last updated: 2020-04-06Bibliographically approved

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Citation style
  • apa
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