电镀废水处理.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,弱水无极环保科技,电镀废水现场试验报告,北京弱水无极环保科技有限公司,昆山弱水无极环保科技有限公司,编号,水样来源,PH,值,重金属含量,(mg/L),Ni,Cu,Ag,Fe,(,一,),一般清洗水,6.67,8.47,4.22,6.07,(,二,),一般清洗水破氰后,11.4,2.08,0.89,0.70,0.18,(,三,),无氰、废酸、铁洗水、脱脂水混合后,0,0.87,0,2.76,水样信息,实验记录,设计思路,水样二：,PH,值为,11.4,，直接投加,RS100,为,100ppm,和,300ppm,进行对比试验，检测铜、镍、铁、银含量；,水样三：先调碱至,PH=9.5,，去除大量的离子态重金属，取上清液,100ml,再加,RS100,，待沉淀后取上清液检测铜、镍、铁、银含量,试验照片,水样二,水样三,水样二加入,RS100,对比照片,加,RS100=100ppm,加,RS100=300ppm,水样二与原液对比图片,水样三调碱后沉淀图片,药剂投加量与出水水质,药剂投加量（,mg/L,）,重金属含量,(mg/L),RS100,PAC,PAM,Ni,Cu,Ag,Fe,水样二,100,100,3,0.142,0.012,0.056,0.035,300,300,5,0.111,0.013,0.078,0.033,水样三,100,100,5,0,0.058,0,0.885,100ppm,即可使镍和铜都达标排放,一般清洗水重金属去除率,镍,铜,银,铁,原水浓度,mg/L,6.67,8.47,4.22,6.07,破氰,+100ppm RS100,出水浓度,mg/L,0.142,0.012,0.056,0.035,去除率,%,98.0,99.9,98.7,99.4,破氰,+300ppm RS100,出水浓度,mg/L,0.111,0.013,0.078,0.033,去除率,%,98.3,99.9,98.1,99.5,结论：,破氰,+RS100,工艺对镍铜银铁的去除率均在,98%,以上，可确保其稳定达标,指导方案及注意事项,指导方案,原水调,pH,后加次氯酸钠破氰处理，沉淀,30min,；,破氰沉淀后出水，加入,100ppm RS100,，搅拌反应,10min,以上；,加入,100ppm,PA,C,，快速搅拌混匀；,加入,5ppm PAM,，搅拌混匀后沉淀30min；,出水加盐酸（硫酸）回调,pH,至,6-9,；,达标排放（,Ni0.5ppm,；,Cu0.5ppm,）,备注：本方案基于客户提供的水样指标，若实际铜镍含量增加，应适当提高,RS100,用量,注意事项,对本水样中的重金属，,RS100,在偏碱性条件下的去除率更高，建议在破氰沉淀后直接投加,RS100,，二级沉淀出水再回调,pH,根据原水重金属浓度不同，可适当加大或减小,RS100,用量；,沉淀效果对出水水质影响较大，建议适当延长沉淀时间以减小出水中悬浮物的影响。,