硫化钠法和亚铁法处理印制线路板络合铜废水对比研究

Comparative study of sodium sulfide method and ferrous method for removing chelated copper from printed circuit board wastewater

印制线路板生产过程中会排放各类废水,其中的综合废水中含有络合铜化合物。目前针对络合铜的去除,硫化钠法和亚铁法的研究较为成熟。然而,现有的研究主要针对于某一方法的优化,并没有从工程应用的角度对2种方法进行一个全面的经济技术比较。针对含络合铜废水,在优化了硫化钠法和亚铁法的操作条件的基础上,结合药剂成本和产生污泥的处理成本,从经济和技术角度对比了2种方法。结果表明,硫化钠法药剂费和污泥处理费成本为2.25元·t-1,低于亚铁法的2.68元·t-1,而基建费用和运行风险则高于亚铁法。

Comprehensive wastewater,which is effluent from the printed circuit board（ PCB） manufacturing process,contains chelated-copper compounds. For chelated-copper removal,two well-developed methods exist：the sodium sulfide method and the ferrous method. However,the research currently discusses these methods individually,and no economic and technical comparisons between the two have been done. In this paper,we developed a comparative study of the sodium sulfide and ferrous methods from operating optimization and economictechnical perspectives,especially for the output of sludge. The results showed that the cost of the sodium sulfide method（ 2. 25 yuan·t- 1） was lower than it was for the ferrous method（ 2. 68 yuan·t- 1）. Nevertheless,the capital expenditure and control risk of the sodium sulfide method were higher than they were for the ferrous method.