某电镀基地含镍废水预处理工艺设计与优化

Design and Optimization of Pretreatment Process of Nickel-containing Wastewater in Electroplating Base

以龙溪电镀基地为例,介绍了该基地废水厂含镍废水的预处理工艺设计流程、参数及优化后的运行效果。预处理过程采用袋滤罐+离子交换工艺去除废水中的杂质并利用树脂吸附再生得到高浓度的硫酸镍溶液。优化后在离子交换装置后添加一道镍精抛工艺,出水流入缓冲池与其他股预处理废水一并进入废水回用系统。现场监测数据表明预处理设施对总镍的去除率达到99%,预处理出水中六价铬、总镉、总银、总铅、总汞、总砷未检出,镍离子浓度低于地表水环境质量标准(GB 3838-2002)Ⅲ类标准和电镀污染物排放标准(GB 21900-2008)表3的排放限值。

The plating base in Longxi town was taken as an example to introduce the pretreatment process, parameters and effect after optimization of the nickel-containing wastewater in.the wastewater station. Using the filtration container and ion exchange technology to remove the impurities in the wastewater and concentrate for the high concentration nickel sulfate solution by resin adsorption. The optimized technology was adding a fine polishing process after the ion exchange device and the treated Water flowed into the wastewater recycling system with other pretreatment of waste water. The detection data showed that the removal rate of total nickel content by pretreatment facilities reached 99%, the hexavalent chromium, total cadmium, silver, lead, mercury and arsenic contents in the effluent after pretreatment were not checked out and the concentration of nickel ions was below the environmental quality standards for surface water （GB 3838 --2002） Class Ⅲstandard and emission standard of pollutants for electroplating （GB21900-- 2008） emission limit values.