人工湿地耦合微生物燃料电池系统对含六价铬废水的净化和产电效果  

Purification and Power Generation Effects of ConstructedWetland Coupled with Microbial Fuel Cell System onWastewater Containing Hexavalent Chromium

作　　者：唐刚 石玉翠 蒋文萱 余鑫鑫 游少鸿[1,2] TANG Gang;SHI Yucui;JIANGWenxuan;YU Xinxin;YOU Shaohong(College of Environment Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi Zhuang Autonomous Region,P.R.China;Technical Innovation Center of Mine Geological Environment Restoration Engineering in Southern Stony Hill Area,Nanning 530000,Guangxi Zhuang Autonomous Region,P.R.China)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]南方石山地区矿山地质环境修复工程技术创新中心,广西南宁530000

出　　处：《湿地科学》2023年第4期564-574,共11页Wetland Science

基　　金：国家自然科学基金项目(51868010);广西创新研究团队项目(2018GXNSFGA281001);广西自然科学基金项目(2019GXNSFBA245083);桂林市科学研究与技术开发计划课题(20190219-3);广西研究生教育创新计划项目(YCBZ2021066)资助。

摘　　要：采用人工湿地耦合微生物燃料电池系统和人工湿地系统,人工配制含六价铬和不含六价铬的模拟废水,将实验分为0~30 d和31~60 d两个阶段连续运行,在实验的第一阶段,向两个系统中输入不含重铬酸钾的模拟废水,在实验的第二阶段,向两个系统中输入含重铬酸钾的模拟废水,研究两个系统在实验不同阶段的水质净化效果、产电特性和系统内部水环境的变化。研究结果表明,在实验的两个阶段,人工湿地耦合微生物燃料电池系统对废水的净化效果优于人工湿地系统,人工湿地耦合微生物燃料电池系统对废水中六价铬的最大去除率可达97.64%;实验第二阶段两个系统对废水中的氨氮、总磷的去除率小于第一阶段,人工湿地耦合微生物燃料电池系统对废水中的化学需氧量的去除率大于第一阶段,人工湿地系统对废水中的化学需氧量的去除率小于第一阶段;实验第二阶段人工湿地耦合微生物燃料电池系统的产电效果优于第一阶段,系统稳定后,其产出电压和最大功率密度分别为473 m V和31.66 mW/m^(3);在实验的两个阶段,人工湿地耦合微生物燃料电池系统水体中的溶解氧含量和pH略小于人工湿地系统,而其氧化还原电位梯度大于人工湿地系统;实验第二阶段两个系统水体的溶解氧含量、氧化还原电位梯度大于第一阶段;在实验的第二阶段,人工湿地耦合微生物燃料电池系统对废水中的六价铬、化学需氧量的去除效果和产电能力较好,而且具有更适于产电的运行环境。Constructed wetland coupled microbial fuel cell system and constructed wetland system were used to artificially prepare simulated wastewater containing hexavalent chromium and without hexavalent chromium.The experiment time was divided into two stages of 0-30 days and 31-60 days.In the first stage of the experiment,simulated wastewater without potassium dichromate was input into 2 systems.In the second stage of the experiment,simulated wastewater containing potassium dichromate was input into 2 systems to study the water purification effect,power generation characteristics and internal water environment of 2 systems at different stages of the experiment.The results showed that in 2 stages of the experiment,the purification effect of constructed wetland coupled microbial fuel cell system on wastewater was better than that of constructed wetland system.The maximum removal rate of hexavalent chromium in wastewater by constructed wetland coupled microbial fuel cell system could reach 97.64%.In the second stage of the experiment,the removal rates of ammonia nitrogen and total phosphorus in wastewater by 2 systems were lower than those in the first stage.The removal rate of chemical oxygen demand in wastewater by constructed wetland coupled microbial fuel cell system was higher than that in the first stage.The removal rate of chemical oxygen demand in wastewater by constructed wetland system was lower than that in the first stage.The power generation effect of the constructed wetland coupled microbial fuel cell system in the second stage of the experiment was better than that in the first stage.After the system was stable,the output voltage and maximum power density were 473 mV and 31.66 mW/m^(3),respectively.In 2 stages of the experiment,the dissolved oxygen content and pH in the water of the constructed wetland coupled microbial fuel cell system were slightly smaller than those of the constructed wetland system,while the redox potential gradient was larger than that of the constructed wetland system.The dissolved oxy

关 键 词：人工湿地 微生物燃料电池 六价铬 产电 

分 类 号：X703[环境科学与工程—环境工程]