School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, 1037 Luoyu Road, Wuhan, Hubei 430074, PR China.
School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China; Hubei Provincial Engineering Laboratory of Solid Waste Treatment, Disposal and Recycling, 1037 Luoyu Road, Wuhan, Hubei 430074, PR China; State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China.
Bioresour Technol. 2020 May;303:122958. doi: 10.1016/j.biortech.2020.122958. Epub 2020 Feb 4.
A coupled microbial electrolysis cell - anaerobic granular sludge system (MEC-AGS) was established to explore the degradation efficiency of 2,4,6-trichlorophenol (TCP) with synchronous biogas production. Results showed that MEC-AGS yielded a higher proportion of CH than MEC (83.8 ± 0.4% vs 82.0 ± 1.0%, P < 0.05) with sodium acetate (NaAc) as the only carbon source. Moreover, MEC-AGS had higher tolerance to the addition of TCP, with the highest TCP degradation efficiency of 45.5 ± 0.5% under 5 mg L of TCP addition in 24 h. Furthermore, microbial community structures were significantly changed based on community composition, hierarchical cluster and PCoA analysis, which proved that MEC-AGS favored the enrichment of dechlorination-related microbes such as Pseudomonas, Desulfovibrio and Longilinea, as well as their syntrophic bacteria of Anaerolineacea, Syntrophobacter, Arcobacter, etc. The coupled system provides a promising strategy for biogas production from wastewater with recalcitrant organics.
建立了耦合微生物电解池-厌氧颗粒污泥系统（MEC-AGS），以探索同步生物气生产时 2,4,6-三氯苯酚（TCP）的降解效率。结果表明，以乙酸钠（NaAc）为唯一碳源时，MEC-AGS 比 MEC 产生更高比例的 CH（83.8±0.4%对 82.0±1.0%，P<0.05）。此外，MEC-AGS 对 TCP 的添加具有更高的耐受性，在 24 h 内添加 5mg/L TCP 时，TCP 的最高降解效率为 45.5±0.5%。此外，基于群落组成、层次聚类和 PCoA 分析，微生物群落结构发生了显著变化，证明 MEC-AGS 有利于脱氯相关微生物（如假单胞菌、脱硫弧菌和长螺旋菌）及其共营养菌（产甲烷菌、产氢产乙酸菌、食烷菌、螺旋菌等）的富集。该耦合系统为利用难降解有机物的废水生产沼气提供了一种很有前景的策略。
