Temporal variation in bacterial and methanogenic communities of three full-scale anaerobic digesters treating swine wastewater
- Temporal variation in bacterial and methanogenic communities of three full-scale anaerobic digesters treating swine wastewater
- 조경진; 황석환; 신승구; 김웅; 한규성; 이준엽
- Full-scale, swine wastewater; Digester type; Anaerobic digestion; Microbial community; Multivariate analysis
- Issue Date
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
- VOL 26, NO 2-1226
- To investigate the effects of temporal variations of process parameters on microbial community structures in the two types of full-scale anaerobic digester treating swine wastewater, three full-scale anaerobic digesters were monitored. An anaerobic filter (AF)-type digester located in Gong-Ju (GJ) showed the highest COD removal among three digesters and maintained stable efficiency. A digester in Hong-Seong (HS) was of the same type as it GJ and showed improved efficiency over the sampling period. A continuously stirred tank reactor (CSTR)-type digester in Soon-Cheon (SC) showed decreasing efficiency due to a high residual concentration of VFAs and NH4+. These process efficiencies were closely correlated to the Simpson indices of the methanogenic communities. Genera Bacillus, Methanosaeta, and Methanospirillum that have filamentous morphology were dominant in both AF-type digesters, but genera Acholeplasma, Methanosarcina, and Methanoculleus that have spherical or coccoid morphology were dominantly abundant in the CSTR-type digester. Correlation between populations suggests a possible syntrophic relationship between genera Desulfobulbus and Methanosaeta in digesters GJ and HS.
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