摘要
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3h-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 1.1-2.0. So it is difficult to treat directly by biochemical process. H2O2-ferric/activated carbon-pH calibration-coagulation process was used to pretreat such wastewater. The results showed that the effect is the best when void speed is 3 h2, H2O2/COD is 1.5, pH is about 8 and the dosage of PAM is 5 mg/m^3. The chemical oxygen demands （COD） can be reduced and the Sn^2＋ removed by precipitation as Sn^4＋ after oxidation. The pretreatment provides necessary conditions for the further biological process.
出处
《钢铁》
CAS
CSCD
北大核心
2007年第5期79-81,共3页
Iron and Steel
基金
国家973计划项目(204CB619108)
