Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, China.
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, China.
Environ Res. 2022 Nov;214(Pt 4):114064. doi: 10.1016/j.envres.2022.114064. Epub 2022 Aug 14.
In this paper, the synthetic methyl orange (MO) dyeing wastewater treated by a reverse electrodialysis reactor (REDR) with 40 member pairs was investigated first. The boron-doped diamond (BDD) and carbon felt were adopted as an anode and a cathode in the REDR. The influences of operation parameters on the chemical oxygen demand (COD) removal efficiency were detected and explored. Then, a mathematical model of organic mineralizing was developed for the REDR to predict the variation of COD removal efficiency with treating time under the different operation conditions. Finally, the energy consumption of the wastewater treated by the REDR was analyzed. The results showed that raising the working fluid flowing velocity and electrode rinse solution flowrate improved the COD removal efficiency and instantaneous current efficiency (ICE), and reduced the total energy consumption (TEC) of the REDR. Raising the initial MO concentration could significantly reduce the TEC despite the COD removal efficiency being near. Since the main energy consumed by the REDR was salinity gradient energy (SGE) from waste heat conversion or the natural environment, the energy cost of REDR treating wastewater has been reduced significantly.
本文首先研究了用 40 对电偶的反向电渗析（REDR）处理合成甲基橙（MO）染料废水。在 REDR 中采用掺硼金刚石（BDD）和碳纤维毡作为阳极和阴极。检测并探讨了操作参数对化学需氧量（COD）去除效率的影响。然后，为 REDR 建立了有机矿化的数学模型，以预测在不同操作条件下处理时间对 COD 去除效率的变化。最后，分析了 REDR 处理废水的能耗。结果表明，提高工作流体流速和电极冲洗液流量可以提高 COD 去除效率和瞬时电流效率（ICE），降低 REDR 的总能耗（TEC）。尽管 COD 去除效率接近，但提高初始 MO 浓度会显著降低 TEC。由于 REDR 的主要能耗是废热转换或自然环境中的盐度梯度能（SGE），因此 REDR 处理废水的能源成本已大大降低。
