Performance of lab-scale microbial fuel cell coupled with unplanted constructed wetland for hexavalent chromium removal and electricity production
Performance of lab-scale microbial fuel cell coupled with unplanted constructed wetland for hexavalent chromium removal and electricity production
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实验室规模的微生物燃料电池结合人工湿地去除六价铬和发电的性能
DOI：
10.1007/s11356-020-08982-z
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发表时间：
2020-04-28
影响因子：
5.8
通讯作者：
Wang, Li
中科院分区：
文献类型：
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作者：
Mu, Chunxia;Wang, Lin;Wang, Li
采用微生物燃料电池耦合人工湿地（CW-MFC）处理污水并同时发电。本研究的主要目的是探索CW-MFC系统处理六价铬（Cr (VI)）废水的最佳条件。研究了化粪池- mfc去除废水中Cr （VI）和COD的性能及其发电性能。电极间距、Cr （VI）、COD浓度、水力停留时间（HRT）对CW-MFC的性能有一定影响。当电极间距为10 cm时，当进水Cr （VI）浓度为60 mg/L、COD浓度为500 mg/L时，最高功率密度可达458.2 mW/m(3)。HRT为3 d时，Cr （VI）和COD去除率最高。与连续CW系统相比，CW- mfc系统产生的电能有利于提高COD和Cr （VI）的去除效率。因此，结果证实了CW-MFC是一种很有前途的技术，可以去除废水中的Cr (VI)，同时实现生物发电。
The microbial fuel cell coupled constructed wetland (CW-MFC) was used for treatment sewage and simultaneously generating electricity. The main aim of this study was to explore the optimal conditions for the treatment of hexavalent chromium (Cr (VI)) wastewater by the CW-MFC system. The performance of CW-MFC in removing Cr (VI) and chemical oxygen demands (COD) contained in wastewater and its electricity generation were studied. Electrode spacing, Cr (VI) and COD concentration, and hydraulic retention time (HRT) had certain effects on the performance of CW-MFC. For the electrode spacing of 10 cm, the highest power density of 458.2 mW/m(3) could be obtained with the influent concentration of Cr (VI) (60 mg/L) and COD (500 mg/L). The highest Cr (VI) and COD removal rate were obtained with the HRT of 3 days. Compared with CW system, the electrical energy generated in CW-MFC was beneficial to improving the removal efficiency of COD and Cr (VI). Thus, the results confirmed that CW-MFC is a promising technology to remove Cr (VI) from wastewater and achieve bioelectricity production simultaneously.