BOX-BEHNKEN DESIGN OPTIMIZATION OF ELECTRO-FENTON/-PERSULFATE PROCESSES FOLLOWING THE ACIDIFICATION FOR TSS REMOVAL FROM BIODIESEL WASTEWATER

Authors : Senem YAZICI GUVENC, Gamze VARANK

Pages : 1767-1780

View : 55 | Download : 10

Publication Date : 2021-10-05

Article Type : Research Paper

Abstract :In this study, biodiesel wastewater was first subjected to acidification process, and then in the second step, Electro-Fenton insert ignore into journalissuearticles values(EF); and Electro-Persulfate insert ignore into journalissuearticles values(EP); processes were applied as treatment method. Box-Behnken Design insert ignore into journalissuearticles values(BBD); method was used for the optimization of process parameters in total suspended solids insert ignore into journalissuearticles values(TSS); removal from biodiesel wastewater, and for formation of mathematical model. Current insert ignore into journalissuearticles values(1-4 A);, H2O2/ Chemical Oxygen Demand insert ignore into journalissuearticles values(COD); insert ignore into journalissuearticles values(0.4-2.0); and time insert ignore into journalissuearticles values(15-45 min); for EF process and current insert ignore into journalissuearticles values(1-4 A);, persulfate/COD insert ignore into journalissuearticles values(1-5); and time insert ignore into journalissuearticles values(15-45 min); for EP process were selected as the independent variables whereas TSS removal was selected as response. Optimum conditions were determined by means of variance analysis insert ignore into journalissuearticles values(ANOVA);, and response surface graphics, and second degree regression models were developed by the use of Design Expert 11.0.1.0 software program for the estimation of TSS removal. According to the results obtained by the application of response surface method, correlation coefficients of second degree polynomial equation were determined as very high for the TSS removal of both processes, and the model`s compliance was observed. Model’s correlation coefficient insert ignore into journalissuearticles values(R2); for EF and EP processes were determined as 92.67% and 93.03% respectively. High R2 values indicate that the experimental data are in conformity with the model’s results. As the result of experimental study actualized under optimum conditions determined by the model for obtaining maximum contaminant removal, TSS removal efficiencies were determined as 98.9% and 90.6% respectively for the EF and EP processes. EF and EP processes, following the acidification process, are suitable treatment alternatives for the removal of TSS from biodiesel wastewater, and BBD method is suitable for the optimization of process.
Keywords : Biodiesel wastewater, electro fenton, electro persulfate, Box Behnken Design

ORIGINAL ARTICLE URL