Comparison of microbial communities during the anaerobic digestion of Gracilaria under mesophilic and thermophilic conditions SCIE SCOPUS

Cited 17 time in WEB OF SCIENCE Cited 16 time in Scopus
Title
Comparison of microbial communities during the anaerobic digestion of Gracilaria under mesophilic and thermophilic conditions
Author(s)
Azizi, Aqil; Kim, Wonduck; Lee, Jung Hyun
KIOST Author(s)
Lee, Jung Hyun(이정현)
Alternative Author(s)
AQIL AZIZI; 김원덕; 이정현
Publication Year
2016-10
Abstract
Mesophilic and thermophilic anaerobic digesters (MD and TD, respectively) utilizing Gracilaria and marine sediment as the substrate and inoculum, respectively, were compared by analyzing their performances and microbial community changes. During three successive transfers, the average cumulative methane yields in the MD and TD were 222.6 +/- 17.3 mL CH4/g volatile solids (VS) and 246.1 +/- 11 mL CH4/g VS, respectively. The higher hydrolysis rate and acidogenesis in the TD resulted in a several fold greater accumulation of volatile fatty acids (acetate, propionate, and butyrate) followed by a larger pH drop with a prolonged recovery than in the MD. However, the operational stability between both digesters remained comparable. Pyrosequencing analyses revealed that the MD had more complex microbial diversity indices and microbial community changes than the TD. Interestingly, Methanomassiliicoccales, the seventh methanogen order was the predominant archaeal order in the MD along with bacterial orders of Clostridiales, Bacteriodales, and Synergistales. Meanwhile, Coprothermobacter and Methanobacteriales dominated the bacterial and archaeal community in the TD, respectively. Although the methane yield is comparable, both MD and TD show a different profile of pH, VFA and the microbial communities.
ISSN
0959-3993
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2153
DOI
10.1007/s11274-016-2112-6
Bibliographic Citation
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY, v.32, no.10, 2016
Publisher
SPRINGER
Subject
SP NOV.; GEN. NOV.; BACTERIUM; UNIQUE; MACROALGAE; STRATEGIES; SEDIMENTS; ARCHAEA; METHANE; BIOMASS
Keywords
Anaerobic digestion; Gracilaria; Mesophilic; Microbial community; Thermophilic
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER
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