FeS_(2)强化微生物燃料电池阳极反硝化脱氮与产电特性  

FeS_(2) enhanced microbial fuel cell anode denitrification and electricity generation characteristics

作　　者：葛丹丹 吴兵党 杨晶晶 许晓毅 吴玮[1,2] 黄天寅 GE Dandan;WU Bingdang;YANG Jingjing;XU Xiaoyi;WU Wei;HUANG Tianyin(School of Environmental Science and Engineering,Suzhou University of Science and Technology;Suzhou Key Laboratory of Sponge City Technology)

机构地区：[1]苏州科技大学环境科学与工程学院 [2]苏州市海绵城市技术重点实验室

出　　处：《环境工程技术学报》2023年第6期2105-2116,共12页Journal of Environmental Engineering Technology

基　　金：国家自然科学基金面上项目(52070137);国家自然科学基金青年科学基金项目(21906078);苏州市社会发展科技创新项目(SS202107);苏州市姑苏创新创业领军人才计划(ZXL2022500);江苏省研究生科研与实践创新计划项目(KYCX20_2765)。

摘　　要：针对不同碳氮比(C/N)的含氮废水,将FeS_(2)引入微生物燃料电池(MFC)阳极构建FeS_(2)强化的微生物燃料电池(PyrMFC)体系,以不加FeS_(2)的空白对照组(C-MFC)为对照,探究其对体系脱氮与产电的影响;采用高通量测序、X射线光电子能谱和扫描电子显微镜探究该体系中微生物丰度、硫和铁元素变化规律,解析FeS_(2)强化体系低C/N下的脱氮机理。结果表明:1)Pyr-MFC的反硝化脱氮效率和产电功率密度均高于C-MFC,硝态氮去除率提高近15.7%,最高电压提高量可达0.274 V。2)C/N分别为4、3、2和1时Pyr-MFC对NO3-N的去除率为100%、97.8%、58.4%和49.7%,均高于C-MFC,表明FeS_(2)有效降低体系对碳源的依赖。3)微生物群落检测结果表明,FeS_(2)将产电微生物(Thauera、Thiobacillus和Geobacter)的物种丰度提高9.43%。4)物质转移分析结果表明,S-为反硝化过程提供电子,Fe^(2+)作为电子穿梭体强化了电子传递,提高了体系的产电性能。In recent years,the research on enhanced microbial fuel cell(MFC)treatment of nitrogen-containing wastewater has attracted extensive attention at home and abroad.FeS_(2) was introduced into MFC anode to construct a FeS_(2)-enhanced microbial fuel cell(Pyr-MFC)system for wastewater with different carbon to nitrogen ratios(C/N).The blank control group without FeS_(2)(C-MFC)was used as a control to explore its effects on nitrogen removal and electro-generation.High throughput sequencing,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM)were used to investigate the changes of microbial abundance,sulfur and iron elements in the system,and the mechanism of nitrogen removal under low C/N in FeS_(2)-enhanced system was obtained.The results showed:1)The denitrification efficiency and power generation density of Pyr-MFC were higher than those of the control group,the nitrate nitrogen removal rate was increased by 15.7%,and the maximum voltage increase was as high as 0.274 V.2)NO3−-N removal rates of Pyr-MFC at different C/N ratios(4,3,2 and 1)were 100%,97.8%,58.4%and 49.7%,respectively,all higher than those of the control group,indicating that FeS_(2) could effectively reduce the dependence of the system on carbon sources.3)The microbial community test results showed that FeS_(2) increased the species abundance of electrogenic microorganisms(Thauera,Thiobacillus and Geobacter)by about 9.43%.4)The results of material transfer analysis showed that S−provided electrons for the denitrification process,and Fe^(2+)enhanced the electron transfer and improved the electro-generation performance of the system as an electron shuttle.

关 键 词：微生物燃料电池(MFC) FeS_(2) 强化 反硝化脱氮 产电 

分 类 号：X703[环境科学与工程—环境工程]