Using watermelon rind and nitrite-containing wastewater for electricity production in a membraneless biocathode microbial fuel cell

JOURNAL OF CLEANER PRODUCTION

卷:307

Article

Yang, Yunlong^1,2  Xu, Peng¹  Dong, Sijia¹  Yu, Yang¹  Chen, Huan^3,4  Xiao, Jibo^1,5 

[1] Wenzhou Univ, Coll Life & Environm Sci, Wenzhou 325035, Zhejiang, Peoples R China

[2] Wenzhou Univ, Natl & Local Joint Engn Res Ctr Ecol Treatment Te, Wenzhou 325035, Zhejiang, Peoples R China

[3] Clemson Univ, Biogeochem & Environm Qual Res Grp, Clemson, SC 29442 USA

[4] Clemson Univ, Dept Environm Engn & Earth Sci, Clemson, SC 29634 USA

[5] Wenzhou Chuangyuan Environm Technol Co Ltd, Wenzhou 325036, Zhejiang, Peoples R China

关键词: Electricity production;    Watermelon rind waste;    Nitrite-containing wastewater;    Microbial fuel cell;   

DOI  :  10.1016/j.jclepro.2021.127306

来源: Elsevier

【 摘 要 】

Waste-to-energy is a promising approach for environmental sustainability. We examined the usage of watermelon rind waste coupled with nitrite-containing wastewater for electricity production in a membraneless biocathode microbial fuel cell (MB-MFC). Results showed that the maximum voltage output with internal nitrite circulation in a fed-batch mode was 294 mV, which was 1.4 and 1.3 times of that without internal circulation and in a continuous mode, respectively. Watermelon rind was quickly fermented to organic acids dominated with acetate and lactate during electricity generation. The most dominant genus in cathodic biofilm was Lactobacillus with a relative abundance of 74%, while the two dominative genera of Clostridium sensu stricto and Bacteroides in anodic biofilm had a similar abundance of approximately 18%. Three microbes cooperated well in producing electricity and converting nitrite to nitrogen gas. Additionally, we found the key genes of nirS/K, conrB and nosZ involved in nitrite reduction. Our results suggest the feasibility of harnessing electrical energy from MB-MFC with watermelon rind waste as substrates and nitrite-containing wastewater as electron acceptor.

【 授权许可】

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