期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 338, 期 -, 页码 287-295出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.05.048
关键词
Bio-electrochemical system; Stainless-steel mesh electrode; Corrugated configuration; Hydrodynamic; Engineerable
资金
- Natural Science Foundation of China [51508551, 21577162]
- China Postdoctoral Science Foundation [2016T90142, 2015M580140]
- Ministry of Environmental Protection of the People's Republic of China [2014ZX07204-005]
- Chinese Academy of Sciences [ZDRW-ZS-2016-5]
The application of bio-electrochemical system (BESs) is strongly depended on the development of the engineering applicable electrode. Here we described an economical and readily processable electrode module with three-dimensional structure, the corrugated stainless-steel mesh electrode module (c-SMEM). This novel developed electrode module was demonstrated to provide a good hydrodynamic characteristic and significantly enhanced the decolorization performance of the BES when serving for treating azo dye (acid orange 7, AO7) containing wastewater. Compared to the conventional planar electrodes module (p-SMEM), c-SMEM was found to prolong the mean residence time (MRT theta) of AO7 and change the flow pattern closer to the plug flow. As a result, the maximum enhancement of the volumetric decolorization rate (vDR) can reach to 255%, even when the c-SMEM and p-SMEM have the same electrode surface area. In addition, a techno-economic analysis model was established to elucidated the effects of the decolorization performance and the material cost on the initial capital cost, which revealed the BES with c-SMEM could be economically comparable to or even better than the traditional bio-decolorization technologies. These results suggest c-SMEM holds great potential for engineering application, which may help paving the way of applying BES at large-scale. (C) 2017 Published by Elsevier B.V.
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