SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 57 ›› Issue (5): 183-192.DOI: 10.1016/j.cjche.2022.09.011

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Comprehensive treatment of latex wastewater and resource utilization of concentrated liquid

Shichao Tian, Yuming Tu, Rujie Li, Yufan Du, Zhiyong Zhou, Fan Zhang, Zhongqi Ren   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2022-06-05 Revised:2022-08-28 Online:2023-07-08 Published:2023-05-28
  • Contact: Zhongqi Ren,E-mail:renzq@mail.buct.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22108012), Natural Science Foundation of Beijing Municipality (2222017), and Fundamental Research Funds for the Central Universities (BUCTRC-202109).

Comprehensive treatment of latex wastewater and resource utilization of concentrated liquid

Shichao Tian, Yuming Tu, Rujie Li, Yufan Du, Zhiyong Zhou, Fan Zhang, Zhongqi Ren   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Zhongqi Ren,E-mail:renzq@mail.buct.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22108012), Natural Science Foundation of Beijing Municipality (2222017), and Fundamental Research Funds for the Central Universities (BUCTRC-202109).

Abstract: Latex wastewater is a kind of refractory organic wastewater containing high concentrations of organics and ammonia nitrogen. In this work, the combined process of forward osmosis (FO) and reverse osmosis (RO) was designed to treat the latex wastewater in the whole process, achieving the water recovery rate of 99% and basically no waste discharge after the catalytic oxidation process. The turbidity of the latex wastewater was decreased to below 1 NTU by microfiltration pretreatment, and then using MgCl2 worked as the draw solution for FO process to treat the latex wastewater. Different operation conditions including adding acid or scale inhibitor as the pretreatment methods were conducted to improve the treatment performance of the combined process. After the treatment of the whole process, the concentration of COD was less than 20 mg·L-1, the concentration of NH3-N was less than 10 mg·L-1, and the concentration of TP was less than 0.5 mg·L-1 for the treated latex wastewater. The water quality met standards of industrial water reuse after the complete analysis of the treated latex wastewater, meanwhile, useful substances of L-Quebrachitol (L-Q) were successfully extracted from the concentrated solution. Therefore, the combined process of FO and RO could realize the efficient treatment and reuse of latex wastewater, which provided with some important guidance on the industrial application.

Key words: Latex wastewater, Resource utilization, Forward osmosis, Reverse osmosis, Concentrated liquid

摘要: Latex wastewater is a kind of refractory organic wastewater containing high concentrations of organics and ammonia nitrogen. In this work, the combined process of forward osmosis (FO) and reverse osmosis (RO) was designed to treat the latex wastewater in the whole process, achieving the water recovery rate of 99% and basically no waste discharge after the catalytic oxidation process. The turbidity of the latex wastewater was decreased to below 1 NTU by microfiltration pretreatment, and then using MgCl2 worked as the draw solution for FO process to treat the latex wastewater. Different operation conditions including adding acid or scale inhibitor as the pretreatment methods were conducted to improve the treatment performance of the combined process. After the treatment of the whole process, the concentration of COD was less than 20 mg·L-1, the concentration of NH3-N was less than 10 mg·L-1, and the concentration of TP was less than 0.5 mg·L-1 for the treated latex wastewater. The water quality met standards of industrial water reuse after the complete analysis of the treated latex wastewater, meanwhile, useful substances of L-Quebrachitol (L-Q) were successfully extracted from the concentrated solution. Therefore, the combined process of FO and RO could realize the efficient treatment and reuse of latex wastewater, which provided with some important guidance on the industrial application.

关键词: Latex wastewater, Resource utilization, Forward osmosis, Reverse osmosis, Concentrated liquid