冷轧厂电镀锡生产过程中产生的废水含有大量的有机物，COD浓度高，pH值在1.1~2.0之间，很难直接进行生化处理。为提高生化处理效果，以H2O2铁炭柱pH调节混凝为处理工艺进行前处理，结果表明，空速为3 h-1、H2O2/COD为1.5（质量比）、pH为8左右、PAM加入量为15 mg/m3时处理效果最好。利用该方法处理冷轧厂镀锡废水，可有效降低COD的浓度， Sn2+被氧化成高价态后沉淀除去，为废水进入后续的生化处理提供了保障。
There is a plenty of organic matters in wastewater from tin electroplating process of cold rolling mill.The concentration of COD is high and pH is between 1.12.0.So it is difficult to treat directly by biochemical process. H2O2ferric/activated carbonpH calibrationcoagulation process was used to pretreat such wastewater. The results showed that the effect is the best when void speed is 3 h-1, H2O2/COD is 1.5, pH is about 8 and the dosage of PAM is 5 mg/m3.The chemical oxygen demands (COD) can be reduced and the Sn2+ removed by precipitation as Sn4+ after oxidation.The pretreatment provides necessary conditions for the further biological process.
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