Interspecies microbial nexus facilitated methanation of polysaccharidic wastes
- Authors
- Saha, Shouvik; Jeon, Byong Hun; Kurade, Mayur B.; Govindwar, Sanjay P.; Chatterjee, Pradip K.; Oh, Sang-Eun; Roh, Hyun-Seog; Lee, Sean Seung won
- Issue Date
- Oct-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Syntrophy; Anaerobic digestion; Polysaccharidic wastes; Acetoclastic methanogenesis; Methane
- Citation
- BIORESOURCE TECHNOLOGY, v.289, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 289
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147017
- DOI
- 10.1016/j.biortech.2019.121638
- ISSN
- 0960-8524
- Abstract
- Compositional variations in organic wastes influence microbial abundancy and syntrophy during anaerobic digestion (AD), impacting the normal performance of digesters for methanation. Investigation of the microbial dynamics during AD following augmentation with polysaccharidic wastes (PW) revealed the association of effective digester performance and methane yields with the microbial nexus. Dominance of the acidogenic saccharolytic genera, Prevotella, Eubacterium, and Lachnoclostridium, enhanced the utilization of carbohydrates (54%) in PW-augmented digesters. Spearman's rs correlation showed dynamic interspecies interactions among acetogenic syntrophs, and that of iron oxidizers/reducers with acetoclastic and hydrogenotrophic methanogens. Propionate oxidizers in Chloroflexi (i.e., Bellilinea, Levilinea, and Longilinea) exhibited positive associations with acetoclastic methanogens. Increase in the population of acetoclastic methanogens (Methanosaeta, 77% and Methanosarcina, 9%) accelerated the methanogenic activity of PW-augmented digesters by 7 times during the exponential phase, increasing the methane yield (75%) compared to the control. Thus, microbial syntrophy facilitated the effective methanation of PW during AD process.
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