电镀废水处理工程实例

Vol.32No.3200661张连凯1杨慧2于德爽1孔范龙1(1,266071;2,541004)采用氧化还原化学沉淀法处理青岛某金属结构有限公司电镀废水,先用还原法和气浮法分别对含铬废水和酸碱废水进行预处理,处理后合流进入化学处理工序实践证明,该方法技术成熟,运行费用较低,出水水质可达到污水综合排放标准(GB8978)1996)中一级标准及第一类污染物最高允许浓度标准要求电镀废水含铬废水酸碱废水氧化还原法化学沉淀法0,112t,800m3/d,Cr6+,300m3/d;,,/0,500m3/d,Zn2+Cu2+Ni2+,(GB8978)1996)1111,,,11112Cr6+CrO2-4Cr2O2-7,,Cr3+,,NaHSO3,Cr6+Cr3+NaHSO3[1],5%~10%,m(Cr6+)Bm(NaHSO3)=1B6~1B8(),,,Ca(OH)2PAM,pH9~10,pH,213311(1),pHCr6+,pH3,,pH215~3,,,Cr6+Cr3+(2)Ca(OH)2NaOH,,62Vol.32No.3200611,8m@312m@4m,HRT8h,2(11),1,8m@312m@4m,HRT5h,2(11),1,2m@215m@3m,HRT30min,pH215~3,11,10m@3m@215m,21,10m@8m@4m,HRT10h,2(11),1,2m@2m@4m,Q=33m3/h,HRT30min1,=6m,H=4m1,3m@3m@2m,pH1,3m@3m@2m1,=6m,H=3m2ZXJ2(11)1WDYZ2pH/mg/L/mg/L/mg/L/mg/L/mg/L/mg/L3~58040206020106~98101130141110130156~910115015210015110(50mg/L),NaOHCa(OH)2PAMPAM,,,pH,Ca(OH)2pH,1015(3),,,31220026,20033,,90%,,24125,6715,49,815,2158/m3,2127/m35(1),,,,,,(2),,(),,(3),,,,,,参考文献1,,...2004,6:37~39m:13964286208EOmail:liankaizhang@1261com:20051105:20051229