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Calcium-dependent electroactive biofilm structure and electricity generation in bioelectrochemical systems

文献类型： 外文期刊

作者： Liu, Ting 1 ; Cai, Xixi 2 ; Ding, Guochun 4 ; Rao, Liqun 3 ; Yuan, Yong 2 ; Zhou, Shungui 2 ;

作者机构： 1.Hunan Agr Univ, Orient Sci & Technol Coll, Changsha 410128, Hunan, Peoples R China

2.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

3.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China

4.China Agr Univ, Coll Resources & Environm Sci, Beijing 100083, Peoples R China

关键词： Electroactive biofilms;Calcium;Exoelectrogens;Electricity generation;Microbial community

期刊名称：JOURNAL OF POWER SOURCES （ 影响因子：9.127； 五年影响因子：8.096 ）

ISSN： 0378-7753

年卷期： 2015 年 294 卷

页码：

收录情况： SCI

摘要： Calcium (Ca2+) plays an important role in guaranteeing the formation and structure of microbial biofilm. However, little is known regarding its influence on the structure and electron transfer properties of electroactive biofilms (EABs). In this study, advanced investigative techniques such as microscopy and electrochemistry are employed to characterize biofilm structure and electron transfer properties following growth at different Ca2+ concentrations in a bioelectrochemical system (BES). As revealed by electrochemical measurements, a lower current is obtained from the EABs formed in the presence of higher Ca2+ concentrations. The decline of the current is due to the dominance of non-active cells and non-exoelectrogens in the biofilms formed at high Ca2+ concentrations. The results of this study provide a better understanding of the effect of Ca2+ on EABs structure and thus electricity generation in BESs. (C) 2015 Elsevier B.V. All rights reserved.

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