Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Bioresour Technol. 2017 Mar;228:322-329. doi: 10.1016/j.biortech.2016.12.114. Epub 2017 Jan 3.
Development of sustainable technologies for treatment of azo dyes containing wastewaters has long been of great interest. In this study, we proposed an innovative concept of using microbial reverse-electrodialysis electrolysis cell (MREC) based Fenton process to treat azo dye wastewater. In such MREC-Fenton integrated process, the production of HO which is the key reactant of fenton-reaction was driven by the electrons harvested from the exoelectrogens and salinity-gradient between sea water and fresh water in MREC. Complete decolorization and mineralization of 400mgL Orange G was achieved with apparent first order rate constants of 1.15±0.06 and 0.26±0.03h, respectively. Furthermore, the initial concentration of orange G, initial solution pH, catholyte concentration, high and low concentration salt water flow rate and air flow rate were all found to significantly affect the dye degradation. This study provides an efficient and cost-effective system for the degradation of non-biodegradable pollutants.
开发用于处理含偶氮染料废水的可持续技术一直备受关注。在本研究中，我们提出了一种使用微生物反向电渗析电解池（MREC）的芬顿工艺处理偶氮染料废水的创新概念。在这种 MREC-Fenton 集成工艺中，由 MREC 中从外生菌获得的电子和海水与淡水之间的盐度梯度驱动 HO 的产生，HO 是芬顿反应的关键反应物。400mg/L 橙 G 的完全脱色和矿化，表观一级速率常数分别为 1.15±0.06 和 0.26±0.03h。此外，橙 G 的初始浓度、初始溶液 pH 值、阴极液浓度、高浓度和低浓度盐水流量以及空气流量均显著影响染料的降解。本研究为降解不可生物降解污染物提供了一种高效且具有成本效益的系统。
