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Bacterial dynamics during the anaerobic digestion of toxic citrus fruit waste and semi-continues volatile fatty acids production in membrane bioreactors
Högskolan i Borås, Akademin för textil, teknik och ekonomi. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China. (Swedish Centre for Resource Recovery)
Högskolan i Borås, Akademin för textil, teknik och ekonomi. (Swedish Centre for Resource Recovery)ORCID-id: 0000-0002-7387-2358
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
Högskolan i Borås, Akademin för textil, teknik och ekonomi. (Swedish Centre for Resource Recovery)ORCID-id: 0000-0003-4887-2433
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2022 (engelsk)Inngår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 319, artikkel-id 123812Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Citrus wastes (CW) are normally toxic to anaerobic digestion (AD) because of flavors such as D-limonene. In this study, bacterial community was evaluated during volatile fatty acids (VFAs) production from CW inoculated by sludge in a membrane bioreactor (MBR) using semi-continuous AD with different organic loading rates (OLR). Four treatments including untreated CW filled with 4 and 8 g center dot VS center dot L(-1)d(-1) OLR (UOLR4 and UOLR8), pretreated Dlimonene-free CW filled with 4 and 8 g center dot VS center dot L(-1)d(-1) OLR (POLR4 and POLR8). The initial inoculum and the CW mixture (DAY0) was used as control for comparison. There was an obviously higher bacterial diversity in raw material (66848 sequences in DAY0), while decreased after AD and higher in POLR4 and POLR8 (65239 and 63916) than UOLR4 and UOLR8 (49158 and 51936). The key bacterial associated with VFAs production mainly affiliated to Firmicutes (37.35-84.73%), Bacteroidetes (0.48-36.87%), and Actinobacteria (0.35-29.38%), and the key genus composed of Lactobacillus, Prevotella, Bacillus, Bacteroides and Olsenella which contributed in VFA generation by degradable complex organic compounds. Noticeably, methanogen completely suppressed after MBR-AD and UOLR4 has greater acid utilizing bacteria (70.09%).

sted, utgiver, år, opplag, sider
Elsevier, 2022. Vol. 319, artikkel-id 123812
Emneord [en]
Bacterial community, Volatile fatty acids, Citrus waste, Anaerobic digestion
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URN: urn:nbn:se:hb:diva-27802DOI: 10.1016/j.fuel.2022.123812ISI: 000783213900001Scopus ID: 2-s2.0-85126111812OAI: oai:DiVA.org:hb-27802DiVA, id: diva2:1655296
Tilgjengelig fra: 2022-05-02 Laget: 2022-05-02 Sist oppdatert: 2023-01-19bibliografisk kontrollert

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Mukesh Kumar, AwasthiLukitawesa, LukitawesaTaherzadeh, Mohammad J

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