摘要
为了探讨生物阴极式廉价隔膜微生物燃料电池(microbial fuel cell,MFC)的基本性能,首先以生物反硝化作用为基础构建了生物阴极MFC,并进一步以涂布聚四氟乙烯(PTFE)的廉价碳纸代替昂贵的质子交换膜(PEM)构建碳纸隔膜生物阴极式MFC。研究结果显示,对于生物阴极式MFC,阴极室中最适宜反硝化细菌生长的NO-3-N浓度为99.2 mg/L,此时输出电压最高可达0.11 V,1 h内NO-3-N的去除率达到80.0%,COD去除率为62.8%;以涂PTFE的碳纸代替PEM的生物阴极式MFC与有PEM的MFC最高输出电压基本一致(均达到0.22 V,外阻500Ω),但碳纸隔膜MFC的产电更稳定。结果验证了廉价隔膜生物阴极式MFC的可行性,并为其应用于污水脱氮奠定基础。
In order to investigate the performances of bio-cathode microbial fuel cell(MFC) with low-cost separator,dual-chamber MFC was designed to decrease the cost by using denitrifying bacteria as cathode catalyst and carbon paper coated polytetrafluoroethylene(PTFE) instead of proton exchange membrane(PEM). The results showed that the optimal concentration of NO-3-N in bio-cathode chamber was 99. 22 mg/L,when the maximum voltage output of bio-cathode MFC(with PEM) could reach 0. 11 V,and the removal efficiency of NO-3-N and COD could be 80% and 62. 8%,respectively. In addition,equal voltage output of 0. 22 V(external resistance 500 Ω) was obtained from bio-cathode MFC with and without PEM during the operation,while the electricity generation of the latter one was more steady. In this research,the feasibility of bio-cathode MFC with low-cost separator was confirmed,and the foundation of using this technology to remove nitrogen from wastewater was also laid.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第6期2163-2168,共6页
Chinese Journal of Environmental Engineering
基金
国家国际科技合作专项(2013DFR60250)
国家自然科学基金资助项目(31200098)
深圳市战略性新兴产业发展专项资金(JCYJ20120618165740619)
关键词
微生物燃料电池
生物阴极
碳纸隔膜
可行性
microbial fuel cell
bio-cathode
carbon paper separator
feasibility
