Cheng Tang , Yaqian Zhao , Chun Kang , Yanhui Li , David Morgan
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引用次数: 0
Abstract
Microbial fuel cell-constructed wetland (MFC-CW) coupling system is a kind of bio-electrochemical intensified CW system which upgrades CW into multi-functional wastewater treatment technology. Achieving robust electrical energy output is one of the critical challenges in MFC-CW. However, some critical factors limited power output of MFC-CW in terms of reactions on electrode. These inhibited cathodic reactions were mainly due to insufficient oxygen supporting and great overpotential of anode because of the excessive oxygen diffusion. This study reports a novel siphon containing MFC-CW and its operational strategy (namely a full siphon recirculation (FSR) mode), to boost power output of the MFC-CW. Consecutive tidal flow (TF) cycles were established by FSR in cathode chamber which contributed to the better performances of both the cathode and the anode. Results show that the highest power density, coulombic efficiency (CE) and normalized energy recovery (NER) in FSR mode were 1.15 mW/L, 19.28 %, 128.15 Wh/kg COD, respectively. Power output of MFC-CW with FSR mode were remarkable high and sustainable compared with other MFC-CW studies with normalized assessment criteria. FSR mode simultaneously shows advantages over the high cathode potential and low anode potential. This novel structure and the operation strategy can be regarded as a smart choice to level up power output of MFC-CW system.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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