标题: Treatment of carbocysteine wastewater by bipolar membrane electrodialysis: From lab-to pilot-scale

作者: Peng, Z (Peng, Zheng); Wang, HP (Wang, Hongping); Cheng, YY (Cheng, Yanyan); Ma, XQ (Ma, Xueqing) ; Chu, YX (Chu, Yanxu); Hu, XY (Hu, Xiaoyang)

来源出版物: Journal of Membrane Science 卷: 687 文献号: 122056 DOI10.1016/j.memsci.2023.122056提前访问日期: Oct 2023 出版年: Dec 2023

摘要: Carbocysteine (H(2)ccys) wastewater, which contains H(2)ccys, chloroacetic acid, and ammonium chloride, can pose significant risks to the environment. In this study, a novel strategy was proposed for treating H(2)ccys wastewater by bipolar membrane electrodialysis (BMED) to realize resource recovery. The migration and coexistence mechanism of organic/inorganic ions in wastewater were investigated in lab-scale experiments. The results indicated that the desirable migration of inorganic ions, such as NH4+ and Cl- ions, in the feed compartment were dominant. The undesirable migration of organic molecules, such as ClCH2COOH and H(2)ccys, could be managed through precise control of the BMED reaction process. To optimize the energy efficiency and thermal effect occurred in the pilot-scale, a two-stage BMED process was designed for treating H(2)ccys wastewater. The results revealed that BMED produced 1.33-1.63 M of HCl and 2.62-2.88 M of NH3 center dot H2O, and removed 90 wt% of NH4Cl from H2ccys wastewater. Meanwhile, the thermal effect of the slot at the outermost acid compartment decreased from 3.32 W in the one-stage BMED process to 0.10 W in the two-stage BMED process during the pilot-scale tests. The current efficiency of the two-stage BMED process for the acid/base production and feed desalination in the pilot-scale tests increased and its energy consumption decreased compared with the lab-scale tests. Moreover, the BMED r(r)ecycling route showed that a closed loop can be realized in the treatment of H(2)ccys wastewater, and its economic assessment showed that applying BMED to the treatment of H(2)ccys wastewater have economic benefits. These findings illustrated the feasibility of this novel strategy for treating H(2)ccys wastewater and laid a solid foundation for its industrialization.

作者关键词: High ammonia wastewaterBipolar membrane electrodialysisIon migrationThermal effectImplications

地址: [Peng, Zheng; Wang, Hongping; heng, Yanyan; Ma, Xueqing; Chu, Yanxu; Hu, Xiaoyang] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China；Southeast Univ, Sch Civil Engn, Dept Municipal Engn, Nanjing 211189, Peoples R China；Wuhan Univ, Res Inst Water Secur, Wuhan 430072, Peoples R China；State Grid Jiangsu Elect Power Co Ltd, Xuzhou Survey & Design Branch, Xuzhou 221005, Peoples R China

通讯作者地址: Wang, Hongping (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

电子邮件地址: hongping.wang@whu.edu.cn

影响因子：9.5