School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea.
Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongnam National University of Science and Technology, Jinju, South Korea.
Environ Sci Pollut Res Int. 2019 Jan;26(2):1217-1226. doi: 10.1007/s11356-017-1103-y. Epub 2018 Jan 11.
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 NH. 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.
为了研究工艺参数时间变化对处理猪废水的两种规模厌氧消化器中微生物群落结构的影响，对三个规模的厌氧消化器进行了监测。位于 Gong-Ju (GJ) 的厌氧滤池 (AF) 型消化器在三个消化器中表现出最高的 COD 去除率，并且保持稳定的效率。Hong-Seong (HS) 的消化器与 GJ 相同，在采样期间效率得到了提高。Soon-Cheon (SC) 的连续搅拌釜式反应器 (CSTR) 型消化器由于 VFAs 和 NH 的残留浓度高，效率逐渐降低。这些工艺效率与产甲烷菌群落的 Simpson 指数密切相关。具有丝状形态的 Bacillus、Methanosaeta 和 Methanospirillum 属在两个 AF 型消化器中占优势，但具有球形或球菌形态的 Acholeplasma、Methanosarcina 和 Methanoculleus 属在 CSTR 型消化器中占优势。种群之间的相关性表明，在 GJ 和 HS 消化器中，种属 Desulfobulbus 和 Methanosaeta 之间可能存在共生关系。
