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Effect of organic compounds on dry anaerobic digestion of food and paper industry wastes
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. University of Borås, Sweden. (Swedish Ctr Resource Recovery)
Lagos State Univ, Nigeria.ORCID iD: 0000-0003-1529-3291
University of Borås, Sweden. (Swedish Ctr Resource Recovery)ORCID iD: 0000-0003-4887-2433
University of Borås, Sweden. (Swedish Ctr Resource Recovery)
2020 (English)In: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 11, no 1, p. 502-509Article in journal (Refereed) Published
Abstract [en]

Effects of antimicrobial compounds on dry anaerobic digestion (dry-AD) processes were investigated. Four compounds with known inhibition effects on traditional wet digestion, i.e. car-3-ene, hexanal, 1-octanol and phenol were selected and investigated at concentrations of 0.005%, 0.05% and 0.5%. Food waste (FW) and Paper waste (PW) were used as model substrates, all assays were running with the substrate to inoculum ratio of 1:1 (VS basis) corresponding to 15% TS in reactors. Generally, increasing concentrations of inhibitors resulted in decreasing methane yields with a few exceptions; in all these specific cases, long, lag phase periods (60 days) were observed. These adaptation periods made possible for the microbial systems to acclimatize to otherwise not preferred conditions leading to higher methane yields. Comparing the effects of the four different groups, phenols had the highest inhibitory effects, with no methane production at the highest amount added, while the lowest effects were obtained in cases of car-3-ene. Furthermore, the results showed that adding inhibitors up to a certain concentrations can repair the balance in AD process, slowing down the degradation steps, hence making it possible for the methanogens to produce a higher amount of methane. This phenomenon was not observed in case of PW, which is already a slow degradable substrate in its nature.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2020. Vol. 11, no 1, p. 502-509
Keywords [en]
Dry anaerobic digestion, food waste, paper waste, inhibitors, methane yield
National Category
Energy Engineering
Research subject
Technology (byts ev till Engineering), Bioenergy Technology; Environmental Science, Natural Resources Management
Identifiers
URN: urn:nbn:se:lnu:diva-94089DOI: 10.1080/21655979.2020.1752594ISI: 000526435200001PubMedID: 32303143Scopus ID: 2-s2.0-85083500350OAI: oai:DiVA.org:lnu-94089DiVA, id: diva2:1428208
Available from: 2020-05-05 Created: 2020-05-05 Last updated: 2021-05-07Bibliographically approved

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Jansson, Anette

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Jansson, AnettePatinvoh, Regina J.Taherzadeh, Mohammad J.
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