ZHANGBo,HUANGHui,QIANJia,et al.Lead-zinc Beneficiation Wastewater Treatment by Liquid Carbon Dioxide Softening/Electrochemical Oxidation/Ultrafiltration Process[J].China Water & Wastewater,2023,39(12):145-148.
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Lead-zinc Beneficiation Wastewater Treatment by Liquid Carbon Dioxide Softening/Electrochemical Oxidation/Ultrafiltration Process

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第12期 Page: 145-148 Column: Date of publication: 2023-06-17
Author(s):
ZHANG　Bo1;  HUANG　Hui2;  QIAN　Jia3;  WANG　Lai-chun3;  ZHANG　Jin-feng1
（1. Jiangsu Zhuobo Environmental Protection Technology Co. Ltd.， Yixing 214205， China； 2. School of the Environment， Nanjing University， Nanjing 210023， China； 3. Yixing Environmental Research Institute of Nanjing University， Yixing 214200， China）
Keywords:
lead-zinc beneficiation wastewater;  liquid carbon dioxide;  electrochemistry;  ultrafiltration;  reuse
Abstract:
Lead-zinc beneficiation wastewater has the characteristics of high pH, high calcium, high suspended solids, high COD, and contains a large number of residual beneficiation reagents and heavy metal ions. The conventional sodium carbonate softening technology has the deficiency of large dosage and high operating cost. The combined process of liquid carbon dioxide softening/electrochemical oxidation/ultrafiltration is adopted to realize the efficient removal of calcium ions, COD and suspended solids. The actual operation results of a project with capacity of 7 500 m3/d show that the effluent is superior to the Emission Standard of Pollutants for Lead and Zinc Industry (GB 25466-2010), which can be directly reused in lead-zinc beneficiation production process, with operating cost of 2.53 yuan/m3.
Last Update: 2023-06-17