生态环境学报Issue(3)：463-468,6.DOI:10.16258/j.cnki.1674-5906.2015.03.014
城市黑臭河涌底泥-微生物燃料电池产电性能及对底泥的修复
Electricity Generation by Urban Black Smelly River Sediment-MFC and the Effect on Sediment Remediation
摘要
Abstract
The microbial fuel cell (MFC) has been demonstrated to be a promising method for converting chemical energy into electrical energy. It can take advantage of many substrates to producing electricity, including sediments in river and sea. When MFC was used in sediment remediation, anode was usually buried in the bottom sediments and cathode suspended in overlying water. As a result of the existence of overlying water, pollutants in sediment not just repaired by MFC, it would also release into water and influenced the overall remediation of sediment and water. Here, we show the concept of a PEM MFC that occurs in separate anode and cathode chambers, with black smelly sediment as the anode microbial inoculum and fuel, 50 mM·L-1 K3[Fe(CN)6] as cathode buffer solution. MFCs ran under different external resistances, and the results included the electric producing of microbial fuel cells and degraded effects of sediment, excluding the influence of overlying water. The results showed that using black smelly sediment as anodic substrate could support the MFC for long-term operation (650 h). Internal resistances of battery were 1341.6, 1339.2, 1330.2, 1386.7 and 1311.7Ω. External resistances impacted the electricity generation and power density output. A stable highest voltage output of 0. 753 V appeared at the external resistor 1000Ω and a highest power density of 4.94 mW·m-2 were obtain at the external resistor 1500Ω. During the run time, black smelly sediment had repaired by MFC: the reduction of organic content in sediment was 7.834%. Highest reductions of total-P, ammonium nitrogen and nitrate nitrogen were 29.98%, 41.64% and 71.52%. They were appeared at the external resistor 100Ω, 100Ω and 1000Ω, respectively. This illustrated that the external resistance can affect the remediation of sediment in MFC.关键词
微生物燃料电池/黑臭底泥/产电/底泥修复/外阻Key words
microbial fuel cell/black smelly sediment/electricity generation/sediment remediation/external resistances分类
资源环境引用本文复制引用
杨玥,王健,朱娟平,张太平..城市黑臭河涌底泥-微生物燃料电池产电性能及对底泥的修复[J].生态环境学报,2015,(3):463-468,6.基金项目
亚热带建筑科学国家重点实验室开放课题（2010KB22）；广州市科技计划项目 （）
