芬顿-粉煤灰协同处理有机实验废水

Treatment of Organic Experiment Wastewater by Fenton Reagent and Fly Ash

先对粉煤灰进行改性,经有机废水CODcr去除率的对比,确定氧化钙改性粉煤灰(m Ca O:m粉煤灰为1:1)的处理效果最好。然后对于芬顿体系,初步确定了处理100 m L废水(CODCr为580 mg/L)的二价铁投加量为0.8 g,30%的过氧化氢4 m L,p H为3,震荡时间1 h。再通过正交试验进一步优化各个条件。最后对芬顿-粉煤灰体系确定了粉煤灰的投加量为7 g、p H=10、吸附震荡时间为1.5 h时,处理有机实验废水的CODcr效果最好,去除率可达85%。

Through comparing the COD removal rates of organic wastewater with modified fly ash, the best modifying way of fly ash was determined as follows： mass proportion of calcium oxide to fly ash 1：1. Then process conditions of Fenton system were determined as follows： for 100 ml organic wastewater （CODer 580mg/L）, ferrous dosage is 0.8 g, hydrogen peroxide dosage is 4ml, pH=3, vibrating time is lh. Orthogonal test was used to optimize the conditions of Fenton and fly ash system. The results show that, when the fly ash dosage is 7 g, pHffil0, vibrating time is 1.5 h, the COD removal rate can reach to 85%.