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研究报告

刘睿,高艳梅,王晓慧,付进南,海热提,罗南,李媛.水力停留时间对MFC-A²/O工艺处理生活污水的影响[J].环境科学学报,2017,37(2):680-685

Effects of hydraulic retention time on MFC coupled A²/O progress for domestic wastewater treatment

基金项目：国家自然科学基金（No.51408020）；国家国际科技合作专项（No.2013DFR60250）；北京市科技计划项目（No.Z151100002115011）

摘要：在10 L的A²/O反应器中构建微生物燃料电池（MFC）系统，以厌氧段作为阳极室去除有机物，缺氧段作为阴极室去除硝酸盐.结果发现，30 d左右可以达到最大输出电流.系统启动后进入稳定期对水力停留时间（HRT）进行优化，结果表明，当HRT=16 h时可以获得最佳出水效果，此时MFC的出水COD、总氮浓度分别比对照A²/O反应器低14.6%和10.1%，在100 Ω外阻下的输出功率密度为612 mW·m^-3；当HRT=12 h时，产电效果最好，最大输出功率密度可以达到808 mW·m^-3.

Abstract：A 10 L MFC coupled A²/O system was built, with the anaerobic tank as anode chamber and the anoxic tank as cathode chamber. This coupled system could achieve max output current after 30 days. During the steady phase, the hydraulic retention time (HRT) was optimized to improve wastewater treatment efficiency and power generation. The results showed that the coupled system could obtain best pollutants removal efficiency when HRT=16 h. Compared with control reactor, concentrations of effluent COD and TN in the coupled system could be reduced by 14.6% and 10.1%. In the meantime, the power density (external resistance=100 Ω) of the coupled system was 612 mW·m^-3. Correspondingly, the optimum HRT when the coupled system achieved highest power generation was 12 h, and the max power density was 808 mW·m^-3.

Key words：microbial fuel cell anaerobic-anoxic-oxic process wasterwater treatment hydraulic retention time