H_2O_2-铁炭法预处理冷轧带钢厂镀锡废水  

Pre-Treatment of Tin-Plating Wastewater From Cold Strip Mill With H_2O_2-Ferric/Carbon

作　　者：林永增[1] 刘梅英[1] 刘相华[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室

出　　处：《钢铁》2007年第5期79-81,共3页Iron and Steel

基　　金：国家973计划项目(204CB619108)

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.

关 键 词：含苯酚磺酸(PSA) COD 铁炭法 H2O2-Fe^2+氧化 预处理 

分 类 号：X756[环境科学与工程—环境工程]