US-Fenton法处理电厂锅炉酸洗废液的实验研究  

Research on Degradation of Acid Pickle Waste Water from Power Plant Boiler by US-Fenton System

作　　者：袁渭军 赵瑞云 赵菁[2] 张改[2] 周芬[2] 

机构地区：[1]西安协力动力科技有限公司,西安710119 [2]西安工业大学材料与化工学院,西安710021

出　　处：《西安工业大学学报》2016年第5期345-351,共7页Journal of Xi’an Technological University

基　　金：陕西省自然科学基础研究计划项目(2014JQ2080);陕西省教育厅专项科研计划项目(2013JK0929)

摘　　要：为了有效处理电厂锅炉乙二胺四乙酸酸洗废液.文中使用超声波与芬顿(Fenton)试剂联合对电厂锅炉EDTA酸洗废水进行处理,采用化学需氧量(COD)降解率为评价指标,考查US-Fenton法对电厂锅炉酸洗废液的处理效果.利用可生化性BOD/COD为评价指标,考查了在处理过程中酸洗废液可生化性的变化.研究结果表明:在正交实验中确定的各因素影响程度的大小关系为Fe^(2+)投加量>H_2O_2投加量>溶液的pH=反应温度T>反应时间t>功率P;单因素实验中确定的最佳反应条件为Fe^(2+)投加量为6.75mg·L^(-1),H_2O_2投加量为0.82mL·L^(-1),pH值为2.5,温度为38℃,反应时间为75min,超声功率为80 W,COD的最佳降解率为57.2%.经过处理后电厂锅炉EDTA酸洗废液的COD从38 495mg·L-1降至16 475mg·L^(-1),可生化性从不足0.1上升至0.32.In order to treat the Elhylene Diamine Tetraacetic Acid（EDTA）waste water discharged from the boiler effectively,the ultrasound-Fenton system is presented.The degradation rate of COD was selected as the evaluation index.The change of biochemical capability in the process of waste water treatment was expressed by BOD/COD.The orthogonal experiment of the six factors and five levels was designed and the single factor experiments were conducted to find the best conditions for treatment.The relation showing the degrees of influence of obtained various factors from the orthogonal expenment is：Fe^2＋ dosage〉H2 O2 dosage〉 solution of pH=Ultrasound temperature 〉 ultrasonic time〉 ultrasonic power.The mixmum Degradation rate of COD is 57.2% when the Fe^2＋ dosage is 6.75 mg·L^-1,the H2O2 dosage is 0.82 mL· L^-41 ,the solution of pH is 2.5,the ultrasound temperature is 38 ℃,the ultrasonic time is 75 min and the ultrasonic power is 80 W.The COD of the treated waste water falls to 16 475 mg·L^-1 from 38 495 mg·L^-1 ,and the biodegradability increased from less than 0.1 to 0.32.

关 键 词：超声波 芬顿 电厂锅炉 酸洗废水 化学需氧量 

分 类 号：X773[环境科学与工程—环境工程]