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35.60%,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NO_(3)^(-)-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在整个试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。
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 do-mestic 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 to-tal 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 m^(3)/(m^(2)·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,NH_(4)^(+)-N,NO_(2)^(-)-N,NO_(3)^(-)-N and TN.Nitrogen removal and power generation of the constructed wetlands was then analyzed.Compared with CW-MFC,removal rates of total nitrogen and organic nitrogen were higher by 29.64%and 35.60%in PCW-MFC and by 12.83%and 18.32%in MCW-MFC.The removal rate of NH_(4)^(+)-N in PCW-MFC was 19.61%higher than in CCW-MFC,attributed to enhanced nitrification by the iron redox cycle of pyrite.Manganese ore pro-moted the removal of NO_(3)^(-)-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 maxi-mum power density generated in PCW-MFC were higher than those in CW-MFC during the entire experi-ment,indicating that pyrite is a good conductor in the constructed wetland microbial fuel cell.In conclu-sion,increasing electron circulation in the anode of a constructed wetland microbial fuel cell improves treatment of sewage water and increases energy production.
作者
高慧君
王征
于一雷
吕翠翠
李文彦
郭佳祎
孙振宇
GAO Hui-jun;WANG Zheng;YU Yi-lei;LYU Cui-cui;LI Wen-yan;GUO Jia-yi;SUN Zhen-yu(College of Forestry,Hebei Agricultural University,Baoding 071000,P.R.China;Xiong'an Innovation Research Institute,Chinese Academy of Sciences(preparatory),Xiong'an 071899,P.R.China;Huadian Water Technology Co.,Ltd.,Beijing 100071,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2024年第6期192-203,共12页
Journal of Hydroecology
基金
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)。
关键词
微生物燃料电池人工湿地
脱氮
阳极材料
产电性能
microbial fuel cell-constructed wetland
denitrification
anode material
electricity generation
作者简介
高慧君,1998年生,女,硕士研究生,主要研究方向为微生物燃料电池人工湿地。E-mail:18330480053@163.com;通信作者:于一雷,1981年生,男,研究员,博士生导师,主要从事湿地水文、水循环和水环境方面的研究。E-mail:yuyilei1222@126.com。
