“化学沉淀-超滤”组合工艺处理焦磷酸盐镀铜废水的研究  

Study on the treatment of pyrophosphate copper plating wastewater by“chemical precipitation-ultrafiltration”combined process

作　　者：冉子寒 张宇峰 顾瑞之[1] 常高峰 刘恩华[2] 张文娟[1] 王雨菲 张宏伟 RAN Zihan;ZHANG Yufeng;GU Ruizhi;CHANG Gaofeng;LIU Enhua;ZHANG Wenjuan;WANG Yufei;ZHANG Hongwei(School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China;State Key Laboratory of Separation Membranes and Membrane Process, Tianjin Polytechnic University, Tianjin 300387, China;Environment Protection Technical Development Center, Tianjin 300191, China)

机构地区：[1]天津城建大学环境与市政工程学院水质科学与技术天津市重点实验室,天津300384 [2]分离膜与膜过程国家重点实验室,天津工业大学,天津300387 [3]天津市环境保护技术开发中心,天津300191

出　　处：《膜科学与技术》2020年第2期6-13,共8页Membrane Science and Technology

基　　金：国家科技重大专项课题(2017ZX07107-001-003);天津市教委科研计划项目(2018KJ161);天津市科技重大专项与工程计划(17ZXSTSF00040)。

摘　　要：采用“化学沉淀管式超滤”组合工艺对焦磷酸盐镀铜废水中的铜和总磷进行处理.探究了氢氧化钙投加量、搅拌时间和搅拌速度对铜和总磷的去除效果,以及运行压力、膜面流速对膜通量的影响,考察了超滤膜污染状况及其影响因素.研究表明,氢氧化钙投加量1.25 g/L、搅拌时间24 min、搅拌速度150 r/min、运行压力0.15 MPa、膜面流速2.5 m/s时,膜的稳定通量在700 L/(m^2·h)左右,出水中铜质量浓度稳定在为0.2~0.3 mg/L,总磷质量浓度稳定在0.2~0.4 mg/L,均符合《污水综合排放标准》(DB12/356—2008)对铜和总磷的要求.组合工艺中的超滤膜污染主要来源于管式膜内壁的滤饼层,经过酸洗后可以较好地恢复稳定通量.This study investigated the performance of copper total phosphorus removal from pyrophosphate copper electroplating wastewater by chemical precipitation-ultrafiltration processes.The effects of calcium hydroxide dosage,stirring time and stirring speed on the removal of copper and total phosphorus,as well as the effects of operation pressure and membrane surface velocity on membrane flux were investigated.The mechanism of membrane fouling was also discussed.The results show that:when the additive amount of calcium hydroxide is 1.25 g/L,stirring time is 24 min,mixing speed is 150 r/min,operating pressure is 0.15 MPa and the membrane surface velocity is 2.5 m/s,the stable membrane flux 700 L/(m^2·h),the content of copper in water 0.2~0.3 mg/L and total phosphorus content 0.2~0.4 mg/L are reached,and lower than the“integrated wastewater discharge standard”(DB12/356—2008)on copper and phosphorus requirements.In the process of electroplating wastewater treatment,the membrane pollution mainly comes from the filter cake layer in the inner wall of tube membrane.After acid pickling,the flux can be basically restored.

关 键 词：焦磷酸盐镀铜废水 管式超滤膜 化学沉淀 电镀废水 

分 类 号：X703.1[环境科学与工程—环境工程]