苯胺废水预处理组合工艺试验

Test of pretreatment of aniline wastewater using combination process

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%。

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 Fe^2＋, so the consumption of H2O2 in catalystic oxidation process was reduced. The results showed that： when the mass concentration of aniline, CODo 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.