气浮/三维电解/生物降解处理芯片封装测试废水研究  

The treatment of chip packaging and testing wastewater by air flotation/three-dimensional electrolysis/biodegradation

作　　者：钟志贤 刘晓婷 黄小雯 宋勇[3] ZHONG Zhixian;LIU Xiaoting;HUANG Xiaowen;SONG Yong(Changsha Uranium Geology Research Institute,CNNC,Changsha 410007,China;Hunan Engineering Technology Research Center for Evaluation and Comprehensive Utilization of Associated Radioactive Mineral Resources,Changsha 410007,China;Department of Materials and Environmental Engineering,Changsha College,Changsha 410022,China)

机构地区：[1]核工业二三〇研究所,湖南长沙410007 [2]湖南省伴生放射性矿产资源评价与综合利用工程技术研究中心,湖南长沙410007 [3]长沙学院材料与环境工程学院,湖南长沙410022

出　　处：《工业水处理》2023年第6期171-175,共5页Industrial Water Treatment

摘　　要：采用“气浮+三维催化电解+生物选择+厌氧好氧”组合工艺处理电子芯片封装测试厂生产废水,探索了各处理单元的不同运行参数对废水中污染物降解的影响。结果表明:四级三维催化电解是该处理工艺的关键步骤,通过四级三维催化电解可使废水中的难降解、具有毒性的有机污染物得到分解,为后续生物处理创造条件。在四级三维电解过程中,当每级的电流密度为70 mA/cm^(2)、总电解时间为6.0 h时,废水COD降解率可达85%以上。确定溶气压力0.2 MPa时的最佳气浮时间为45 min,生物选择池的停留时间为2~3 h。厌氧处理结果表明,当水力停留时间为4 d时,出水BOD/COD可提高到0.28左右。好氧处理的最佳曝气时间为14 h。该组合工艺可使废水中的COD降至300 mg/L,TN低于20 mg/L。A combined process of air flotation,three-dimensional catalytic electrolysis,biological selection and an-aerobic aerobic was used to treat the wastewater of electronic chip packaging and testing plant,and the effects of dif-ferent operating parameters of each treatment unit on the degradation of pollutants in the wastewater were explored.The results showed that four-stage three-dimensional catalytic electrolysis was the key step of the treatment process.Through four stage three-dimensional catalytic electrolysis,the refractory and toxic organic pollutants in the waste-water could be decomposed,creating conditions for subsequent biological treatment.When the current density of each stage was 70 mA/cm^(2) and the total electrolysis time was 6.0 h,the degradation efficiency of COD could reach more than 85%.It was determined that the optimum flotation time was 45 min when the dissolved gas pressure was 0.2 MPa,and the residence time of biological selection pool was about 2-3 hours.The research of anaerobic treat-ment showed that when the hydraulic retention time was 4 days,the effluent BOD/COD could increase to about 0.28.The optimum aeration time determined in the aerobic treatment study was 14 h.Through this process,the COD of wastewater could be reduced to 300 mg/L and the TN could be lower than 20 mg/L.

关 键 词：气浮 三维催化电解 电子芯片封装测试 粒子电极 

分 类 号：X703.1[环境科学与工程—环境工程]