外阻对天然水体中沉积型微生物燃料电池(SMFC)运行特性的影响  

Effect of external resistance on the performance of natural water sediment microbial fuel cell

作　　者：朱荣[1] 任月萍[1] 李秀芬[1] 游晓伟 牟姝君 

机构地区：[1]环境生物技术研究室,环境与土木工程学院,江南大学,无锡214122

出　　处：《环境化学》2014年第5期794-798,共5页Environmental Chemistry

基　　金：国家自然科学基金项目(21076097;21206058);水体污染控制与治理科技重大专项(2012ZX07101-013-04);中央高校基本科研业务费专项资金资助(JUSRP111A09)资助

摘　　要：在校园浅水湖中以10、100、500、1000Ω外阻运行沉积型微生物燃料电池(Sediment microbial fuel cell,SMFC)180 d,考察了外阻对天然水体中SMFC产电性能和有机质去除率的影响.实验结果表明,运行180 d内,外阻为100Ω的SMFC体系(SMFC-100)的平均输出功率密度和有机质去除率最高,分别为3.40 mW·m-2和38%.短期运行(30 d)后,体系的内阻随着外阻增大而逐渐增大,分别为98.7、120.2、124.2、149.7Ω,但是SMFC-100体系的最大功率密度(Pmax)最高,为6.12 mW·m-2.长期运行(150 d)后,4个体系的内阻和Pmax均进一步增大,然而各体系的Pmax相差不大.Sediment microbial fuel cells （ SMFCs ） with different external resistances （ 10 Ω, 100 Ω, 500 Ω and 1000 Ω） were placed in a shallow lake to generate current for 180 days. The effect of external resistances on the performances of SMFCs and the removal efficiencies of organics in sediment were meticulously investigated in this paper. SMFC running under 100 Ω external resistance showed the highest average output power density and organics removal efficiency which were 3. 40 mW·m-2 and 38%, respectively. After short-term running （ 30 days ） , the internal resistances of the SMFCs were 98. 7 Ω,120. 2 Ω,124. 2 Ω and 149. 7 Ω, respectively, which rose with the increase of external resistances. Moreover, SMFC-100 exhibited the highest maximum output power density （Pmax）, 6.12 mW·m-2. After long-term running （150 days）, the internal resistances and Pmax of all the four SMFC further increased. However, the difference of Pmax between SMFCs with different external resistances was neglectable.

关 键 词：沉积型微生物燃料电池(SMFC) 外阻 产电性能 有机质去除率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]