Construction and optimization of response surface model on ironcarbon microelectrolysis pretreatment parameters
(1. School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013， China; 2. ATK Holdings Group Co., Ltd., Yixing, Jiangsu 214214， China
Abstract：Taking printing and dyeing wastewater as research object, a response surface model was constructed by central composite design method based on a series of single factor experiments. COD and chromaticity removal rate were chosen as evaluation index, and the effects of initial pH value, gas water ratio and reaction time were discussed. Analyzing 3 independent variables and the interaction effects on COD and chromaticity removal rate, the model extreme point was finally determined by combining J. J. Sylvester inequality. The best process factors were determined to optimize the experimental design parameters. The results show that under the optimal conditions with pH value of 2.7, gas water ratio of 14 ∶1 and reaction time of 44 min, COD and chromaticity removal rate can reach 70.19% and 91.32%, respectively. The errors of COD and chromaticity removal rate are respective 3.49% and 2.46%, which means that the proposed response surface model can well illuminate the ironcarbon microelectrolysis pretreatment.
2017, Vol. 38 
