Red Oil Wastewater COD Photocatalytic Removal with DOE Method

Document Type : Original Article


1 Faculty of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran

2 Chemical Engineering Department, Amirkabir University of Technology, Tehran, Iran

3 Department of Chemical and Biomolecular Engineering,Rice University,Texas,USA


In this Investigation, photocatalytic process of COD reduction for a real spent caustic wastewater sample(Red
Oil),were used with Design of Experiment(DOE)Method. In this Method, Response surface model(RSM) was
obtained in the view of a Box-Behnken design (BBD) with four variables as the input factors, i.e. TiO
2 loading (g/l),
pH, oxidant amount (ppm) and aeration rate (l/min). The optimum quantity of every factor was calculated according
to the experimental settings and statistical model parameters. Finally, High COD removal in 90 min (93%) were
obtained under optimum conditions.