期刊
BIORESOURCE TECHNOLOGY
卷 182, 期 -, 页码 225-231出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.02.004
关键词
Electrochemical analysis; Hypochlorite; Microbial fuel cell; Power density; Sludge digestion
资金
- Department of Science and Technology, Government of India [DST/TSG/NTS/2010/61]
Waste activated sludge was digested in anodic compartment of dual chambered clayware microbial fuel cell (MFC). Performance of MFC was evaluated using oxygen (MFC-1) and hypochlorite (MFC-2) as cathodic electron acceptors. Power production of 8.7 W/m(3) was achieved using hypochlorite as catholyte, which was two times higher than using oxygen (4.2 W/m(3)). Total chemical oxygen demand of sludge was reduced by 65.4% and 84.7% in MFC-1 and MFC-2, respectively. Total and volatile suspended solids reductions were higher in MFC-2 (75.8% and 80.2%, respectively) as compared to MFC-1 (66.7% and 76.4%, respectively). Use of hypochlorite demonstrated 3.8 times higher Coulombic efficiency (13.8%) than oxygen. Voltammetric and impedance analysis revealed increase in reduction peak (from 8 to 24 mA) and decreased polarization resistance (from 42.6 to 26.5 Omega). Hypochlorite proved to be better cathodic electron acceptor, supporting rapid sludge digestion within 8 days of retention time and improved power production in MFC. (c) 2015 Elsevier Ltd. All rights reserved.
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