Assessment of pretreatment and digestion temperature on anaerobic digestion of whiskey byproducts and microbial taxonomy

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dc.contributor.authorKang, Xihui
dc.contributor.authorLin, Richen
dc.contributor.authorLi, Lianhua
dc.contributor.authorWu, Benteng
dc.contributor.authorDeng, Chen
dc.contributor.authorO'Shea, Richard
dc.contributor.authorSun, Yongming
dc.contributor.authorMurphy, Jerry D.
dc.contributor.funderChina Scholarship Councilen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderEnvironmental Protection Agencyen
dc.contributor.funderStrategic Priority Research Program of the Chinese Academy of Sciencesen
dc.contributor.funderEuropean Regional Development Funden
dc.contributor.funderPernod Ricarden
dc.contributor.funderGas Networks Irelanden
dc.date.accessioned2022-07-22T12:01:57Z
dc.date.available2022-07-22T12:01:57Z
dc.date.issued2021-09
dc.date.updated2022-07-22T11:35:48Z
dc.description.abstractThe effects of steam and sulfuric acid pretreatment on anaerobic digestion (AD) of whiskey byproducts (including draff, thin and thick stillage) were investigated in order to improve the digestion performance under both mesophilic and thermophilic temperatures. The results of biomethane potential assays suggested that thermophilic AD facilitated the release of free ammonia (ca. 1200 mg/L) from byproducts, resulting in strong ammonia inhibition and volatile fatty acid accumulation. In contrast, no free ammonia inhibition (ca. 700 mg/L) was observed under mesophilic AD; the methane yield from mesophilic AD was between 375.3 +/- 13.6 mL/g volatile solid (VS; acid-treated sample) and 389.1 +/- 8.5 mL/g VS (untreated sample). Although acid pretreatment (2% acid under 135 degrees C for 15 min) did not improve the methane yield from mesophilic AD, it reduced the digestion time by 14.3% compared to that of the untreated sample. Microbial community analysis showed that irrelevant of pretreatment, hydrogenotrophic methanogens of Methanobrevibacter (28.9%-49.8% in abundance) and Methanoculleus (26.0%-55.9% in abundance) were the dominant archaeal genus under mesophilic AD. In comparison, hydrogenotrophic Methanothermobacter (over 97% in abundance) were dominant in thermophilic AD. This study could be exploited to aid in decarbonizing the whiskey industry by optimizing the biogas process in a circular economy system.en
dc.description.sponsorshipScience Foundation Ireland (Grant number 16/SP/3829); Environmental Protection Agency – Ireland (Grant number 2018-RE-MS-13); Strategic Priority Research Program of the Chinese Academy of Sciences (Grant number XDA21050400); European Regional Development Fund (Interreg NWE Project BioWILL [No. NWE 964])en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid114331en
dc.identifier.citationKang, X., Lin, R., Li, L., Wu, B., Deng, C., O'Shea, R., Sun, Y. and Murphy, J. D. (2021) 'Assessment of pretreatment and digestion temperature on anaerobic digestion of whiskey byproducts and microbial taxonomy', Energy Conversion and Management, 243, 114331 (12pp). doi: 10.1016/j.enconman.2021.114331en
dc.identifier.doi10.1016/j.enconman.2021.114331en
dc.identifier.endpage12en
dc.identifier.issn0196-8904
dc.identifier.journaltitleEnergy Conversion and Managementen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/13397
dc.identifier.volume243en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2302/IE/Marine Renewable Energy Ireland (MaREI) - The SFI Centre for Marine Renewable Energy Research/en
dc.rights© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectSyntrophic acetate oxidationen
dc.subjectOrganic loading rateen
dc.subjectMethane productionen
dc.subjectBiogas productionen
dc.subjectCo-digestionen
dc.subjectGen. Nov.en
dc.subjectBiomethane productionen
dc.subjectAmmonia inhibitionen
dc.subjectAcid pretreatmenten
dc.subjectPennisetum-hybriden
dc.titleAssessment of pretreatment and digestion temperature on anaerobic digestion of whiskey byproducts and microbial taxonomyen
dc.typeArticle (non peer-reviewed)en
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