Fenton试剂氧化法深度处理青霉素废水

Advanced treatment of Penicillin wastewater by Fenton oxidation

采用Fenton氧化技术深度处理青霉素废水,通过单因素试验,研究了pH、H2O2/Fe2+的摩尔比值、H2O2的投加量和反应时间T,4个因素对COD的去除效果及各因素间影响.结果表明:处理废水的最佳条件为废水初始pH为3,H2O2/Fe2+的摩尔比值为1∶1,H2O2的投加量为300 mg/L,反应时间为60 min,此时COD的去除率高达59%左右.在单因素基础上,使用Design Expert软件设计,通过二次回归得到COD去除率与废水的初始pH,H2O2/Fe2+的摩尔比,H2O2的投加量关系的回归模型,该模型能够较好地预测COD的去除率.同时,3个因素对COD去除效果的影响排序为H2O2投加量>H2O2/Fe2+的摩尔比>溶液初始pH,最后得到的优化参数为:pH为2.98,H2O2/Fe2+的摩尔比为0.76∶1,H2O2的浓度为295.10 mg/L,此时COD的去除率为57.415 5%.

Fenton oxidation is studied as an advanced treatment process of pharmaceutical wastewater, the effect of pH value, the ratio of H2O2/Fe2＋ , the concentration of H2O2 and the reaction time on COD removal rate, as well as the relationship among the above factors were investigated by using single factor text. The results of the test show that when the pH value was 3, e ratio of H2O2/Fe2＋ was 1 ： 1, the concentration of H2O2 was 300mg/L and the reaction time was 60mins, the removal rate of COD reached 59 %. And then, based on the single factor test, the regression model related to the removal efficiency of COD, pH value, the ratio of H2O2/Fe2 ＋ and the concentration of H2O2 was obtained by using Design Expert. The regression model would be a fairly reliable forecast for COD removal rate. And, it could be found that the influencing degree of different factors on oxidation performance of Fenton reagent was in the descending order of the concentration of H2O2, the ratio of H2O2/Fe2＋ , pH value. The optimized parameters were obtained as follows. COD removal rate was 57. 415 5 %, when pH was 2.98, ratio of H2O2/Fe2 ＋ was 0.76：1, the concentration of H2O2 was 295.10 mg/L.