The potential mechanisms for anaerobic phenol degradation and methanogenesis promotion by biochar addition were evaluated by batch experiments,and the effects of biochar derived at 300,500 and 700℃ on lag time,maximum methane production rate and microbial community structure were elucidated in this study. The results indicated a strong linear relationship between the electron exchange capacity of biochar and Rmax (R2=0.997). Furthermore, methanogenic lag time was notably shortened from 15.0days to 1.1~3.2days, and the maximum CH4 production rate was increased from 4.0mL/d to 10.4~13.9mL/d by biochar addition (15g/L). Moreover, the methanogenesis of phenol was optimized by addition of biochar prepared at 500℃ because of the most abundance of electrochemically active quinones.In addition, microbial community analysis showed that the electroactive Geobacter and Methanosaeta microbial consortia were enriched by biochar addition. It was further demonstrated that biochar addition fueled the methane production rate of phenol by promoting interspecies electron transfer.
高新, 王高骏, 李倩, 陈荣. 生物炭强化苯酚厌氧降解产甲烷特性[J]. 中国环境科学, 2020, 40(2): 631-639.
GAO Xin, WANG Gao-jun, LI Qian, CHEN Rong. Characteristics of enhanced anaerobic degradation and methanogenesis of phenol by biochar addition. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(2): 631-639.
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