地杆菌
厌氧消化
化学
废水
流出物
碳纤维
甲烷
零价铁
制浆造纸工业
环境化学
材料科学
吸附
环境科学
细菌
环境工程
有机化学
生物膜
生物
复合数
工程类
复合材料
遗传学
作者
Yajie Li,Weikang Kong,Yuyao Zhang,Haibin Zhou,Hongbo Liu,Salma Tabassum
标识
DOI:10.1016/j.bej.2023.109118
摘要
Coal gasification wastewater (CGW) has a complex composition and exhibits significant concentration and toxicity. In practical engineering, a single treatment technique may not always produce the best results. In this paper, iron-carbon multi-micro-electric field coupling anaerobic co-digestion treatment is adopted with synthetic CGW as the research object. By using single factor analysis and response surface methodology, the optimum operating conditions: the activated carbon/zero-valent iron (ZVI) (C/Fe) ratio of 2:1 and a carboxymethyl cellulose (CMC) concentration of 0.8 mg/L were achieved. According to the reactor's operation findings, methane production grew to 200 mL/d, and the average removal efficiencies of total phenol and quinoline could reach 52.8±5.6% and 94.9±6.8%, respectively, under optimal operating conditions. The iron-carbon multi-micro-electric field coupling anaerobic co-digestion can significantly lower the toxicity of CGW during optimal operation, according to an investigation of effluent toxicity. The microbial community in the granular sludge of the anaerobic system was analyzed using metagenomic sequencing technology. Direct interspecies electron transfer (DIET) was promoted by the coupling system with enriched electroactive bacteria like Syntrophorhabdus and Geobacter. This study can serve as a guide for engineering applications that promote anaerobic improved treatment of refractory wastewater.
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