标题:Using an anaerobic digestion tank as the anodic chamber of an algae-assisted microbial fuel cell to improve energy production from food waste
作者:Hou, Qingjie ;Yang, Zhigang ;Chen, Shuaiqi ;Pei, Haiyan
作者机构:[Hou, Qingjie ;Yang, Zhigang ;Chen, Shuaiqi ;Pei, Haiyan ] School of Environmental Science and Engineering, Shandong University, Qingdao; 266237, Chin 更多
通讯作者:Pei, Haiyan
通讯作者地址:[Pei, H] Shandong Provincial Engineering Center on Environmental Science and TechnologyChina;
来源:Water Research
出版年:2020
卷:170
DOI:10.1016/j.watres.2019.115305
关键词:Algae-assisted microbial fuel cell; Anaerobic digestion; Food waste; Methane production; Stress alleviation
摘要:Anaerobic digestion is sensitive to a wide variety of inhibitory substances that are the primary cause of anaerobic digester failure. Herein, an anaerobic digestion (AD) tank, which also functioned as the anodic chamber of an algae-assisted microbial fuel cell (AMFC), was established to treat food waste (FW) under an inhibition-relieved condition. About 2.9 L of CH4 was yielded by the AD-AMFC system, which was more than double the CH4 produced by the AD system, and 34% higher than that from the AD-MFC system. The result suggests that the bioelectrochemical system and algae successfully improved the AD performance and energy production. The AD-AMFC system had the highest volatile fatty acid (VFA) concentration in the initial 20 days, but it maintained the lowest VFA concentration in the following days. Those results indicate that the AMFC shortened the acclimatisation phase of the AD process and then alleviated the adverse impact of VFAs by consuming VFAs as a substrate for electricity generation. Alkalinity generated by algal growth and cathode reactions buffered the H+ that migrated from the anolyte, which facilitated the pH recovery of the AD process. Ammonia inhibition of the AD was also relieved by the AMFC through reduction of the ammonia concentration to less than 500 mg/L in the anolyte. Additionally, the COD removal rate was improved to 89%, since the AMFC facilitated the decomposition of large molecules. The present study developed a practical structure for an AD tank and also explained the reason as to why the AMFC improved the AD performance. © 2019 Elsevier Ltd
收录类别:EI;SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85075265011&doi=10.1016%2fj.watres.2019.115305&partnerID=40&md5=550b251bf8132a0647113f26093f2bfd
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