曝气铁碳内电解-改性茶渣联用技术处理含铬电镀废水  

Treatment ofelectroplating wastewater containing chromium by aerated Fe/C internal electrolysis-modified tea dregs hyphenated technique

作　　者：林业星 王子波 LIN Ye-xing;WANG Zi-bo(JiangsuProvincial Ecological Assessment Center,Nanjing,Jiangsu 210036,China;Yangzhou University,Yangzhou,Jiangsu 225009,China)

机构地区：[1]江苏省生态环境评估中心,江苏南京210036 [2]扬州大学,江苏扬州225009

出　　处：《污染防治技术》2018年第5期50-52,56,共4页Pollution Control Technology

摘　　要：曝气铁碳内电解-改性茶渣联用技术处理含铬电镀废水,对内电解处理工序中Fe/C体积比、进水pH、不同曝气方式、停留时间及改性茶渣处理工序中进水pH、进水温度、处理时间对废水中Cr6+的去除率的影响进行分析。结果表明,最佳工艺条件为:内电解工序:Fe/C体积比为1∶1、进水pH为1、采用连续曝气方式、停留时间为120 min;改性茶渣工序:进水pH为7. 5、室温下投加0. 4 g改性茶渣、处理时间为120 min,最终出水中Cr6+浓度为0. 409 mg/L,低于GB8978—1996中最高允许排放浓度。In this paper,electroplating wastewater containing chromium was treated by aerated Fe/C internal electrolysis-modified tea dregs hyphenated technique. The effects of volume ratio of Fe/C,influent pH,different aeration mode,residence time in internal electrolysis process as well as the effects of influent pH,influent temperature,residence time in modified tea dregs process on the removal rate of Cr6 +were discussed. The experiment results show that the optimal parameters of treatment are as follows:internal electrolysis process: Fe( V) ∶ C( V) is 1∶ 1,influent pH is 1,continuous aeration mode,residence time is 120 min; modified tea dregs process: influent pH is 7. 5,at room temperature,0. 4 g dregs,residence time is 120 min. The concentration of Cr6 +in final effluent is 0. 409 mg/L,which is lower than the maximum allowable emission concentration in GB8978—1996.

关 键 词：含铬电镀废水 曝气铁碳内电解 改性茶渣 废水处理 

分 类 号：X703.1[环境科学与工程—环境工程]