Comparison of microbial communities during anaerobic digestion of kitchen waste: Effect of substrate sources and temperatures. (December 2020)

• Record Type: Journal Article
• Authors: Jiang, Junfeng; Wu, Peiwen; Sun, Yongming; Guo, Yufang; Song, Bing; Huang, Yi; Xing, Tao; Li, Lianhua
• Is Part Of: Bioresource technology. Volume 317(2020)
• Publication Date: 2020-12
• Subjects: Kitchen waste -- Anaerobic digestion -- Microbial community -- Sources -- Temperature; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.124016
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Kitchen waste from different sources have no obvious effect on microbial communities. Temperature has obvious effect on the changing of bacteria and methanogens. A selected enrichment in some bacteria observed with temperature changed. Abstract: In this study, batch experiments were conducted to compare the effect of temperature and substrate source on microbial communities in the anaerobic digestion of kitchen waste. The results showed that the microbial communities of anaerobic digestion were not sensitive to varied sources of waste, but shifted with the change in operating temperatures. In the reactors operated at mesophilic conditions, Levilinea, Syntrophomonas, Methanothrix, and Methanosphaerula, etc. were the dominant microbes during the process. While in thermophilic reactors, Levilinea, Ornatilinea, Methanosphaerula and Methanomassiliicoccus, etc. prevailed. Meanwhile, an enrichment in Coprothermobacter, Defluviitoga, Defluviitalea, Tepidimicrobium, Lutispora and Fonticella were observed as the temperature changed from mesophilic to thermophilic, suggesting these genera could be selectively enriched at thermophilic conditions. The results provided fundamental understanding of the microbiology that could support the scale up of food waste anaerobic digestion.