电Fenton技术深度处理造纸废水

Electro-Fenton Procress for Advanced Treatment of Papermaking Wastewater

关键词:  电Fenton  造纸废水  深度处理  去除率

Key Words:electro-Fenton  papermaking wastewater  advanced treatment  removal rate

摘要:采用电Fenton技术深度处理二级生化后的造纸废水，以色度去除率和COD去除率为主要考察指标，研究不同因素对造纸废水深度处理效果的影响。反应的最佳条件为：反应时间120 min、初始pH值=3、电压12 V、Fe²⁺浓度0.8 mmol/L、H₂O₂浓度0.8 mmol/L、极板间距10 cm、电解质Na₂SO₄浓度6 g/L。最佳反应条件下，电Fenton法对造纸废水的色度去除率和COD_Cr去除率分别达到89.5%和68.4%。动力学分析表明，电Fenton技术对造纸废水COD的降解符合一级反应动力学规律，一级反应速率常数为k=0.2072 min^-1。

Abstract:The electro-Fenton method was used for advanced treatment of papermaking wastewater．The paper investigated the effect of different factors on treatment result to determine the optimum conditions，the chroma and COD removal rate were chosen as the evaluation indexs．The result suggested that the optimum conditions were as the follows: reaction time 120 min, initial pH value 3, electrolysis voltage of 12 V, Fe²⁺ concentration 0.8 mmol /L, H₂O₂ concentration 0.8 mmol/L, plate space 10 cm, Na₂SO₄ dosage 6 g/L, the chroma and COD_Cr removal rate were 89.5% and 68.4% respectively under the conditions.Kinetic analysis showed that the papermaking wastewater degradation curve of COD_Cr consisted with the first-order reaction kinetic characteristics and the value of the kinetic constant was 0.2072 min^-1.