苯胺废水预处理组合工艺试验

采用铁炭微电解法对苯胺废水进行预处理,微电解的作用使苯胺废水中的大部分苯胺降解,而且出水中含有足够的Fe2+,从而减少了催化氧化过程中双氧水的消耗量。结果表明:当进水苯胺、CODCr的质量浓度分别为204、448mg/L,色度为500倍时,在最佳工艺条件(微电解工艺的铁炭体积比1∶1、废水pH值为5,停留时间90min;催化氧化工艺条件为双氧水(30%)用量0.3mL/L,pH值调节至5,反应时间60min)下,该方法对苯胺的去除率为95.32%,对CODCr的去除率达到66.96%,色度的去除率为92%。

Test of pretreatment of aniline wastewater using combination process

In the pretreatment of aniline wastewater by ferric-carbon microelectrolysis,most of the aniline in the wastewater were degraded through the microelectrolysis,and the effluent water contained enough Fe2+,so the consumption of H2O2 in catalystic oxidation process was reduced.The results showed that: when the mass concentra-tion of aniline,CODCr in the influent water were 204,448 mg/L respectively,the colority was 500 times,under the optimal process condition(the volume ratio of iron and carbon was 1 ∶ 1,the pH value was 5,the residence time was 90 min during the microelectrolysis;the dosage of H2O2(30%) was 0.3 mL/L,the pH value was adjusted to 5,the reaction time was 60 min during the catalystic oxidation process).Using the said method,the removal rate of aniline,CODCr,colority were 95.32%,66.96%,92% respectively.