线路板印刷含铜废水浓缩方案研究

Study on Concentration of Copper Containing Wastewater from Printed Circuit Board

印刷线路板生产含铜废水由于水量大、水质复杂导致在实际工程中出现处理难度大,处理成本高的困难,是限制电子工业元器件发展的主要因素之一。生物法工艺的应用对于提高线路板印刷含铜废水浓缩处理效率、降低成本和促进水的循环利用等等方面具有广阔的应用价值和前景。针对传统的方法无法彻底除去线路板印刷中含铜废水的特点,在经过一列的研究和分析采用生物法工艺对其进行深度处理,在试验研究分析中,我们通过污水在反应中的停留时间、pH等参数来优化反应器的运行效果。结果试验表明,在厌氧阶段pH为=7±0.5,温度在30~35度、水力停留的时间为12H;在好痒阶段水力的停留时间为10H,DO的质量浓度为2~4 mg/L,这个处理系统对COD的除去率在85%以上,总铜的除去率持平在80%左右,氨氮的除去率都达到了90%,处理出来的水稳定达到了综合污水的排放标准(GB8978-1996)中的规定的一级排放标准。

Printed circuit board production wastewater containing copper due to large amount of water, water complex resulted in practical engineering processing difficulty, high processing cost, is one of the roam factors limiting the development of the electronic components industry. The application of the biological process technology has a wide application value and prospect in improving the concentration efficiency, reducing the cost and promoting the recycling of water. The traditional methods can not completely remove the characteristics of wastewater containing copper in printed circuit board, through the research and analysis in a column by biological process for advanced treatment of the experimental study on analysis, operation restlt of our parameters through the residence time of waste water in the reaction, the pH to optirnize the reactor. The results showed that in the anaerobic stage pH＋0.5=7, ternperature of 30-35 degrees, the hydraulic retention time was 12H： the residence time in the itchy stage hydraulic was 10H, the mass concentration of DO was 2-4 mg/L, the removal rate of COD processing system in more than 85 %, the total removal rate of copper flat at around 80 % the removal rate of ammonia nitrogen reached 90 %, water stable out to the comprehensive wastewater discharge standard （GB8978-1996） to the first level emission standard regulations.