预处理软化+膜工艺深度处理阴极铜废水

Advanced Treatment of Copper Cathode Production Wastewater Using Pre-demineralizing and Membrane Process

某铜业公司阴极铜生产废水为3 000 m3/d,主要包括酸性废水中和后出水、化学水处理站浓水和普通生产废水。深度处理系统根据生产需要,处理酸性废水、化学水站浓水、普通生产废水单股或多股混合废水。由于深度处理项目建设与铜业公司建设同步,设计阶段对来水水质只能根据矿石组成和同类型废水水质进行估算,其中总硬度≤800 mg/L、总碱度≤600 mg/L、SS≤200 mg/L、硫酸盐≤900 mg/L。通过Mathematica软件模拟计算和可能的来水水质进行分析验证,深度处理系统采用多阶混凝沉淀+多介质过滤+离子交换+膜系统工艺,处理后80%清水达标进入厂区回用水管道,其余浓水进入渣缓冷循环水管道。该项目建成运行后,深度处理系统脱盐率≥97%,出水水质达到业主确定的软化水水质标准。

A copper-producing company generates 3 000 m3/d wastewater, including neutralized acidic wastewater, highly contaminated chemical wastewater and general industrial wastewater. The ad- vanced wastewater treatment system was constructed synchronously with the copper company to deal with single or multiple mixed wastewater in accordance with the company＇ s production. The quality of incom- ing wastewater was estimated as total hardness ≤ 800 mg/L, total alkanility≤600 mg/L, SS≤v200 mg/L and sulphate≤900 rag/L, based on the composition of the ore and the same type of wastewater. Software Mathematica was used to simulate and analyze the quality of possible incoming wastewater. The combined process of multi-stage coagulation sedimentation, multi-media filtration, ion exchange, and membrane system was used to treat the wastewater. After the treatment process, 80% of effluent can meet quality standards and be recycled while the rest goes into cooling cycle tube for treatment of residues. With the advanced wastewater treatment system, the desalination rate could reach no less than 97%, and the efflu- ent successfully met the standards of demineralized water required by the business owner.