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New insights on process performance and stability for anaerobic co-digestion through modelling and population analysis
VIVAB Vatten och Miljö i Väst, Sweden; Lund University, Sweden.
VIVAB Vatten och Miljö i Väst, Sweden.
University of Queensland, Australia.
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy. Lunds university, Sweden. (Urban Water Management)ORCID iD: 0000-0003-1547-8413
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Anaerobic co-digestion (AcoD) allows for underutilised digesters to increase biomethane production. The organic fraction of municipal solid waste (OFMSW), e.g. food waste, is an abundant substrate with high degradability and gas potential. This paper focuses on the implementation of codigestion of mixed sludge from wastewater treatment and OFMSW through batch and continuous labscale experiments, modelling and microbial population analysis. The results show a rapid adaptation of the process and an increase of the biomethane production of 20 to 40% with 50% OFMSW and it has an impact on the microbial community. The methanogenic activity increases and changes towards acetate degradation while the community without co-substrate remains unaffected. The modelling results show that ammonium inhibition increases at elevated organic loads and that intermittent feeding causes fluctuations in digester performance due to varying inhibition. Modelling can be successfully used for designing feed strategies and experimental set-ups for anaerobic co-digestion.

Place, publisher, year, edition, pages
2018.
Keywords [en]
anaerobic digestion, mathematical modelling, microbial community, solid waste
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:ri:diva-33939OAI: oai:DiVA.org:ri-33939DiVA, id: diva2:1218472
Conference
IWA World Water Congress and Exhibition 2018, Tokyo, Japan.16-21 September, 2018.
Available from: 2018-06-14 Created: 2018-06-14 Last updated: 2023-05-25Bibliographically approved

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Arnell, Magnus

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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  • de-DE
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  • en-US
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Output format
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