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Conversion of sewage sludge into high-performance bifunctional electrode materials for microbial energy harvesting

文献类型： 外文期刊

作者： Yuan, Yong 1 ; Liu, Ting 1 ; Fu, Peng 1 ; Tang, Jiahuan 1 ; Zhou, Shungui 1 ;

作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.Hunan Agr Univ, Orient Sci & Technol Coll, Changsha 410128, Hunan, Peoples R China

3.Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Guangdong, Peoples R China

期刊名称：JOURNAL OF MATERIALS CHEMISTRY A （ 影响因子：12.732； 五年影响因子：11.995 ）

ISSN： 2050-7488

年卷期： 2015 年 3 卷 16 期

页码：

收录情况： SCI

摘要： Conversion of sewage sludge (SS) into value-added biochar has garnered increasing attention due to its potential applications as a soil amendment and pollutant adsorbent. In this study, we propose a new application of the SS-derived biochar as an advanced bifunctional electrode material (anode and cathode) in microbial fuel cells (MFCs). To function as an anode, the SS amended with various amounts of coconut shell was pressed into a mold and then converted into SS-derived carbon monoliths (SMs) by heat treatment. Meanwhile, powdered SMs (PSMs) were used as the catalysts for oxygen reduction in the cathodes of the MFCs. The maximum power density of 969 +/- 28 mW m(-2) was achieved from the MFC with a SM anode and a PSM cathode, which was ca. 2.4 times that of the MFC with a graphite anode and a Pt cathode. The enhanced electrical conductivity of the SMs caused by amending the coconut shell resulted in the enrichment of exoelectrogens and the decrease in electron transfer resistance, which were responsible for the excellent performances of the as-prepared electrodes. This study suggests a promising method to convert SS into bifunctional electrode materials, offering a new opportunity for value-added applications of SS-derived biochar.

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