一种线路板废水处理新技术的应用

Application of a New Treatment Technology of PCB Wastewater

线路板废水排放量大、成分复杂,污染物种类多。结合某工程实例介绍了一种新的处理技术:JDL重金属废水处理及资源化技术。该技术可实现废水预处理后综合处理,可操作性强;出水水质稳定,可达到《电子工业污染物排放标准——电子元件》(2009年征求意见稿)三级排放标准;废水再生回用率>65%;污泥产量为传统工艺的1/10,污泥重金属含量高,可实现重金属回收;占地面积减少1/2;吨水处理费用降低30%以上。

The wastewater from printed circuit boards （PCB） industry is characterized by great quantity, complicated components and many kinds of pollutants. A new treatment technology namely JDL heavy metal wastewater treatment and resource utilization is introduced through an engineering project. The technology can realize a comprehensive treatment of the wastewater after pretreatment, with a great maneuverability. The effluent quality meets the third class criteria specified in Discharge Standards for E- lectrical Pollutants from Electrical Unit Industry （Exposure Draft 2009 ）. The wastewater reuse rate is over 65%. Sludge yield is one-tenth of that from traditional process. The high content of heavy metals in sludge is helpful for recovering heavy metals. The area occupied by the treatment system is reduced by 50%. The treatment cost per ton of wastewater is decreased by over 30%.