Treatment of Dyeing Wastewater by TiO_2/H_2O_2/uv Process: Experimental Design Approach for Evaluating Total Organic Carbon (TOC) Removal Efficiency

摘要

Optimal operating conditions in order to treat dyeing wastewater were investigated by using the factorial design and responses surface methodology (RSM). The experiment was statistically designed and carried out according to a 2~2 full factorial design with four factorial points, three center points, and four axial points. Then, the linear and nonlinear regression was applied on the data by using SAS package software. The independent variables were TiO_2 dosage, H_2O_2 concentration and total organic carbon (TOC) removal efficiency of dyeing wastewater was dependent variable. From the factorial design and responses surface methodology (RSM), maximum removal efficiency (85%) of dyeing wastewater was obtained at TiO_2 dosage (1.82 gL~(-1)), H_2O_2 concentration (980 mgL~(-1)) for oxidation reaction (20 min).