芬顿试剂与DDBAC联合调理污泥的工艺优化  

Technological optimization of sludge conditioned by Fenton's reagent combined with surfactant

作　　者：邢奕[1] 王志强[1] 洪晨[1,2] 刘敏[1] 司艳晓[1] 

机构地区：[1]北京科技大学环境科学与工程系,北京100083 [2]中国科学院生态环境研究中心,北京100083

出　　处：《中国环境科学》2015年第4期1164-1172,共9页China Environmental Science

基　　金：国家自然科学基金资助项目(51104009);北京市科技新星计划项目(Z111106054511043);北京市优秀人才培养资助项目(2012D009006000003);中央高校基本科研业务费专项资金资助项目(FRF-TP-12-011B);昆明市科技计划项目(2012-02-09-A-G-02-0001);广东省教育部产学研结合项目(2011B090400629)

摘　　要：研究了不同p H值下芬顿试剂(H2O2/Fe2+)与表面活性剂(DDBAC)联合调理对污泥脱水性能的影响,以污泥滤饼含水率(WC)和毛细吸水时间(CST)作为评价指标进行单因素试验,得出p H值以及药剂投加量最佳范围.然后通过以响应曲面优化法(RSM)为依据的Box-Behnken试验,建立了WC和CST减少率二次多项式预测模型,进而得到各影响因素的最优值.结果表明,联合调理过程中p H=3.91,H2O2、Fe2+和DDBAC的投加量分别为47.60,38.60,58.20mg/g时,WC降至60.26%,CST减少率升至89.89%,污泥脱水性能明显改善.同时,在最优条件下进行了验证试验,试验结果与模型预测值基本吻合,表明基于响应曲面法所得的最佳工艺参数准确可靠,对相关污泥处理及条件优化具有一定的指导意义.Dewatering performance of sludge modified by Fenton＇s reagent combined with surfactant（DDBAC） in various p H values was investigated in this study. Capillary suction time（CST） and water content of filtered cake（WC） were used to evaluate the sludge dewaterability and single factor experiment was conducted to obtain the optimum range of p H and reagent dosage. Then the quadratic polynomial prediction models of WC and CST reduction efficiency were established by a Box-Behnken experimental design based on response surface methodology（RSM） to obtain the optimum of the influencing variables. The results indicated that the optimum values for Fe2＋, H2O2, DDBAC and p H were respectively 40mg/g（dry solids）, 40mg/g, 60mg/g and 4, at which the WC of 60.26% and the CST reduction efficiency of 89.89% could be achieved in the conditioning process. Meanwhile, verifying experiment was done under optimal conditions and the results agreed with that predicted by an established polynomial model. Therefore, the optimum parameters which were obtained by RSM were accurate and reliable, and had certain guiding significance for sludge treatment and condition optimization.

关 键 词：污泥调理 P H值 芬顿试剂 表面活性剂 脱水性能 响应曲面优化法 

分 类 号：X705[环境科学与工程—环境工程]