Abstract:Dewatering performance of sludge modified by Fenton’s reagent combined with surfactant (DDBAC) in various pH 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 pH 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 pH 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.
邢奕, 王志强, 洪晨, 刘敏, 司艳晓. 芬顿试剂与DDBAC联合调理污泥的工艺优化[J]. 中国环境科学, 2015, 35(4): 1164-1172.
XING Yi, WANG Zhi-Qiang, HONG Chen, LIU Min, SI Yan-Xiao. Technological optimization of sludge conditioned by Fenton’s reagent combined with surfactant. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(4): 1164-1172.