混凝沉淀-微电解-Fenton组合工艺预处理香精香料废水

Pretreatment of Perfume Waste-water by Coagulation Sedimentation-micro-electrolysis-Fenton Process

摘要: 以香精香料生产废水为实验对象,其COD浓度为58421mg/L,采用混凝沉淀-微电解-Fenton组合工艺对该废水进行预处理,研究废水pH、药剂投加量、反应时间等因素对废水COD去除的影响。结果表明:以5%FeCl₃为混凝剂,在p H=7,FeCl₃投加量为10mL/50mL,0.06%PAM投加量为0.25mL/50mL时,废水COD的去除率为20.1%;铁碳微电解-铁碳材料与废水比例为2∶1（w/v）,pH为3～4,曝气反应时间150min时,COD的去除率为14.6%; p H为4～5,双氧水投加量0.4mL/100mL,Fenton反应5h时,去除率为36.6%。经过该组合工艺的处理,香精香料废水总COD去除率可达60%。

Abstract: The perfume waste-water containing 58421 mg/L of COD was pretreated by coagulation-sedimentation-micro-electrolysis-Fenton process,and the effects of pH,dosage and reaction time on the removal rate of COD were studied systematically. The results showed that with FeCl₃ as coagulant,the dosage of 5% FeCl₃ was 10 mL/50 mL,pH 7,and the dosage of 0. 06% PAM was 0. 25 ml/50 mL,the removal rate of COD reached to 20. 1%; the ratio of iron-carbon micro-electrolysis-iron-carbon material to waste-water was 2∶ 1（ w/v）. When p H 3-4,the aeration reaction time was 150 min,the removal rate of COD was 14. 6%; p H 4 ～ 5,dosage of Hydrogen Peroxide was 0. 4 mL/100 mL,reaction time was 5 hours,the removal rate of COD reached to 36. 6%. After the whole process,the total removal rate of COD was 60%.