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微生物燃料电池人工湿地对污水氮降解及产电性能研究

Denitrification of Domestic Wastewater and Generation of Electricity in Microbial Fuel Cell-Constructed Wetland

投稿时间：2024-02-23 修订日期：2024-05-02

DOI：10.15928/j.1674-3075.202402230051

英文关键词:microbial fuel cell-constructed wetland denitrification anode material electricity generation

基金项目:国家自然科学基金（52204188）；中国华电科工集团有限公司科技项目（CHECKJ22-02-17）。

作者	单位
高慧君	河北农业大学林学院，河北保定 071000；中国科学院雄安创新研究院（筹），河北雄安 071899；
王征	河北农业大学林学院，河北保定 071000；
于一雷	中国科学院雄安创新研究院（筹），河北雄安 071899；
吕翠翠	中国科学院雄安创新研究院（筹），河北雄安 071899；
李文彦	中国科学院雄安创新研究院（筹），河北雄安 071899；
郭佳祎	中国科学院雄安创新研究院（筹），河北雄安 071899；
孙振宇	华电水务科技股份有限公司，北京丰台 100071

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中文摘要:

对比分析不同阳极材料构成的微生物燃料电池人工湿地对生活污水中氮的降解作用和产电性能的影响，为更有效地处理生活污水提供基础。2023年9-10月构建以活性炭、锰矿、黄铁矿为阳极的3种微生物燃料电池人工湿地，通过分析污水净化效果、装置产电性能以及微生物群落结构来研究其在处理秦皇岛北戴河团林污水处理厂实际污水中氮降解及产电性能。结果显示：针对去除有机氮为主的生活污水，与活性炭燃料电池人工湿地（CW-MFC）相比，黄铁矿燃料电池人工湿地（PCW-MFC）对总氮和有机氮的去除效率提高了29.64%和35.6%，锰矿燃料电池人工湿地（MCW-MFC）对总氮和有机氮的去除效率分别提高了12.83%、18.32%；对于NH4+-N的去除，PCW-MFC去除效率比CW-MFC高19.61%，可能黄铁矿发生铁氧化还原循环进而促进硝化作用；锰矿促进了对NO3--N的去除，去除效率比CW-MFC高25.02%，可能是锰氧化物发生氧化还原反应促进电子转移增强了反硝化作用。PCW-MFC在整个实验阶段产生的平均电压和最大功率密度都高于CW-MFC，说明黄铁矿在微生物燃料电池人工湿地系统中起到较好的导体作用。研究结果表明增加阳极填料的电子循环作用，可以有效提高微生物燃料电池人工湿地对生活污水的处理效果。

英文摘要:

In this study, we compared different anode materials on denitrification of domestic sewage and generation of electricity in microbial fuel cell-constructed wetland, aiming to more effectively treat domestic sewage and extract energy. In September and October 2023, three materials were tested as anodes in constructed wetland microbial fuel cells, including activated carbon (CW-MFC), manganese ore (MCW-MFC) and pyrite (PCW-MFC), and each treatment was run in triplicate. Actual sewage from the Tuanlin Wastewater Treatment Plant in Beidaihe, Qinhuangdao was obtained for the test, with average total nitrogen of 89.42 mg/L, a C/N range of 0.8-2, a water retention time of 12 d and hydraulic loading of 0.0397 m3/(m2·d). Water samples at the outlet of each wetland were collected at 0, 6, 12, 24, 36, 48, 72 h and on days 6, 9 and 12 for determination of COD, NH4+-N, NO2--N, NO3--N and TN. Nitrogen removal and power generation of the constructed wetlands was then analyzed. Compared with CCW-MFC, removal rates of total nitrogen and organic nitrogen were higher by 29.64% and 35.6% in PCW-MFC and by 12.83% and 18.33% in MCW-MFC. The removal rate of NH4+-N in PCW-MFC was 19.61% higher than in CW-MFC, attributed to enhanced nitrification by the iron redox cycle of pyrite. Manganese ore promoted the removal of NO3--N with a removal rate 25.02% higher than in CW-MFC, attributed to enhanced electron transfer and denitrification by manganese oxide redox reactions. The average voltage and maximum power density generated in PCW-MFC were higher than those in CW-MFC during the entire experiment, indicating that pyrite is a good conductor in the constructed wetland microbial fuel cell. In conclusion, increasing electron circulation in the anode of a constructed wetland microbial fuel cell improves treatment of sewage water and increases energy production.

高慧君,王征,于一雷,吕翠翠,李文彦,郭佳祎,孙振宇.2024.微生物燃料电池人工湿地对污水氮降解及产电性能研究[J].水生态学杂志,45(6):192-203.

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