APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY

SAI Shi-jie; LI Mai-jun; DANG Ping; LIU Hui; ZHANG Na; HUANG Xia

doi:10.13205/j.hjgc.202107024

Volume 39 Issue 7

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(7): 173-178

SAI Shi-jie, LI Mai-jun, DANG Ping, LIU Hui, ZHANG Na, HUANG Xia. APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 173-178. doi: 10.13205/j.hjgc.202107024

Citation:

SAI Shi-jie, LI Mai-jun, DANG Ping, LIU Hui, ZHANG Na, HUANG Xia. APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 173-178. doi: 10.13205/j.hjgc.202107024

Citation:

SAI Shi-jie, LI Mai-jun, DANG Ping, LIU Hui, ZHANG Na, HUANG Xia. APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 173-178. doi: 10.13205/j.hjgc.202107024

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APPLICATION OF HIGH SEPARATION NANOFILTRATION PROCESS IN ZERO DISCHARGE OF HIGH SALT WASTEWATER FROM COAL CHEMICAL INDUSTRY

doi: 10.13205/j.hjgc.202107024

1. Inner Mongolia Jiuke Kangrui Environmental Protection Technology Co., Ltd, Ordos 017000, China;
2. State Key Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China

Received Date: 2021-02-27
Available Online: 2022-01-18

Abstract

Abstract

A high separation nanofiltration system consisting of 3 sub-nanofiltration systems was proposed and its effect in zero discharge project of high salt wastewater from coal chemical industry was analyzed.Resultsshowed that the average rejection rates of SO₄^2- and Cl^- were 99.7% and-13.7% respectively, and the average water recovery rate was 81.9%, which indicated a good separation effect of monovalent and divalent salts. The fluctuation of water recovery rates and operating pressures of nanofiltration system and its subsystems in continuous operation were small, and the system operation stability was high. The average rejection rates of COD, Ca²⁺ and Mg²⁺ were 47.6%, 76.9% and 86.0% respectively, while the cleaning frequencies were 2.1, 0 and 1.0 times per month respectively, which indicated that the system had a high anti-fouling performance. The plant demonstrated that the high separation nanofiltration system had a promising prospect in the field of zero discharge of high salt wastewater.
- nanofitration,
- high salt wastewater,
- zero discharge,
- coal chemical industry,
- rejection rate

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References(27)

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