APPLICATION OF PRETREATMENT+MULTISTAGE MEMBRANE CONCENTRATION+EVAPORATIVE CRYSTALLIZATION+MEMBRANE ELECTROLYSIS COMBINED PROCESS IN A ZERO DISCHARGE PROJECT OF PAPERMAKING WASTEWATER

LI Da-hai; ZHANG Xing-xing; CHEN Gan; XU Shi-quan; YANG Xue-min; GAO Yi

doi:10.13205/j.hjgc.202107026

Volume 39 Issue 7

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(7): 185-191

LI Da-hai, ZHANG Xing-xing, CHEN Gan, XU Shi-quan, YANG Xue-min, GAO Yi. APPLICATION OF PRETREATMENT+MULTISTAGE MEMBRANE CONCENTRATION+EVAPORATIVE CRYSTALLIZATION+MEMBRANE ELECTROLYSIS COMBINED PROCESS IN A ZERO DISCHARGE PROJECT OF PAPERMAKING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 185-191. doi: 10.13205/j.hjgc.202107026

Citation:

LI Da-hai, ZHANG Xing-xing, CHEN Gan, XU Shi-quan, YANG Xue-min, GAO Yi. APPLICATION OF PRETREATMENT+MULTISTAGE MEMBRANE CONCENTRATION+EVAPORATIVE CRYSTALLIZATION+MEMBRANE ELECTROLYSIS COMBINED PROCESS IN A ZERO DISCHARGE PROJECT OF PAPERMAKING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 185-191. doi: 10.13205/j.hjgc.202107026

Citation:

LI Da-hai, ZHANG Xing-xing, CHEN Gan, XU Shi-quan, YANG Xue-min, GAO Yi. APPLICATION OF PRETREATMENT+MULTISTAGE MEMBRANE CONCENTRATION+EVAPORATIVE CRYSTALLIZATION+MEMBRANE ELECTROLYSIS COMBINED PROCESS IN A ZERO DISCHARGE PROJECT OF PAPERMAKING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 185-191. doi: 10.13205/j.hjgc.202107026

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APPLICATION OF PRETREATMENT+MULTISTAGE MEMBRANE CONCENTRATION+EVAPORATIVE CRYSTALLIZATION+MEMBRANE ELECTROLYSIS COMBINED PROCESS IN A ZERO DISCHARGE PROJECT OF PAPERMAKING WASTEWATER

doi: 10.13205/j.hjgc.202107026

Zhejiang Kaichuang Environmental Technology Co., Ltd, Hangzhou 311121, China

Received Date: 2021-02-01
Available Online: 2022-01-18

Abstract

Abstract

In order to share the successful experience of a 17500 m³/d papermaking wastewater zero discharge project in a domestic industrial park in China, this paper focused on design parameters of the combined process, pretreatment+multi-stage membrane concentration+evaporative crystallization+membrane electrolysis, and analyzed the operation data of some process units. The operation data showed that the removal rate of residual COD in the secondary effluent of papermaking wastewater by ozone activated carbon biofilter was more than 50%, the removal rate of hardness index in the first RO concentration by mechanical accelerated clarifier was 70%, the effluent hardness of ion exchanger was stable at 0~4 mg/L, and the reconcentration ratio of chloride ion by sodium chloride concentration RO unit was about 3 times. Finally, the paper introduced the engineering experience of membrane concentration and evaporation crystallization system transformation, and illustrated that the perfect process flow and technical guarantee measures were the key to the success of this zero discharge project of industrial wastewater from the perspective of technical summary.
- papermaking wastewater,
- ozone activated carbon biofilter,
- mechanical accelerated clarifier,
- multistage membrane concentration,
- ion exchange,
- evaporative crystallization,
- drum drying,
- electrodialysis,
- membrane electrolysis

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References(23)

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