| Literature DB >> 26590759 |
Rengasamy Karthikeyan1, Ammayaippan Selvam1, Ka Yu Cheng2, Jonathan Woon-Chung Wong3.
Abstract
This study aimed at manipulating ionic conductivity (EC) to harvest the maximum electrical energy from seawater-based domestic wastewater sewage sludge (SWS), unique to only a few cities, through microbial fuel cell (MFC). SWS has never been investigated as a MFC substrate before, and thus the influence of high in-situ EC on the energy recovery was unknown. In this study, the EC of the SWS was reduced through mixing it with fresh water-based domestic wastewater sewage sludge (FWS) or diluted 50% using deionized water while FWS and SWS were individually served as reference treatments. SWS:FWS mix (1:1) exhibited a maximum Coulombic efficiency of 28.6±0.5% at a COD removal of 59±3% while the peak power density was 20-fold higher than FWS. The improved performance was due to the lower ohmic internal resistance (36.8±4.2Ω) and optimal conductivity (12.8±0.2mScm(-1)). Therefore, dilution with FWS could enhance energy recovery from SWS.Entities:
Keywords: Bioelectricity; Ionic conductivity; Microbial fuel cell; Power density; Saline sewage sludge
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Year: 2015 PMID： 26590759 DOI： 10.1016/j.biortech.2015.10.101
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642