欢迎访问过程工程学报, 今天是

›› 2006, Vol. 6 ›› Issue (3): 408-412.

• 过程与工艺 • 上一篇    下一篇

直接微生物燃料电池的构建及初步研究

连静,冯雅丽,李浩然,刘志丹,周良   

  1. 北京科技大学土木与环境工程学院
  • 出版日期:2006-06-20 发布日期:2006-06-20

Construction and Preliminary Studies on the Direct Microbial Fuel Cell

LIAN Jing,FENG Ya-li,LI Hao-ran,LIU Zhi-dan,ZHONG liang   

  1. School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing
  • Online:2006-06-20 Published:2006-06-20

PDF

被引次数

113

摘要： 利用Geobacter metallireducens能够以Fe(OH)3固体作电子受体进行呼吸的特性，用其构建直接微生物燃料电池，初步考察了产电情况和产电原理. 实验证明，Geobacter metallireducens直接微生物燃料电池的电能产出主要依赖于吸附在电极上的细菌. 燃料醋酸钠可以完全氧化至CO2，反应结束后其浓度低于检测下限(<10 mmol/L). 电子回收率达80%，电流密度达704.4 mA/m2.

关键词: 微生物燃料电池, Geobacter metallireducens, 生物膜, 电子回收率

Abstract: The mediators added in indirect microbial fuel cells are often toxic, unstable and costly. Direct microbial fuel cells do not need mediators during oxidation of carbohydrate or organic acids, overcoming the above problems, so it can be used in bioremediation and treatment of waste water. In the present work, Geobacter metallireducens, a dissimilatory ferric reducing microorganism that can use Fe(OH)3 as the electron acceptor, was used to construct the direct microbial fuel cell. Geobacter metallireducens was inoculated into chambers in which a graphite electrode served as the sole electron acceptor and acetate was the electron donor. Electricity production and mechanism were preliminarily studied. The direct microbial fuel cell was successfully constructed. It was proved that microbial electricity production was mainly due to the cells attached to the electrode. Electrode-attached cells completely oxidized acetate to the levels below detection limit (<10 mmol/L). The electron recovery was 80%, and current density was up to 704.4 mA/m2.

Key words: microbial fuel cell, Geobacter metallireducens, biofilm, electron recovery