Open AccessOptimization of Degradation of Emulsified Oil by Microbial Missile Using Response Surface Methodology
Author(s) -
Tong Wei,
Mingyu Wang,
Shaojun Zhang,
Zhen Zhang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/750/1/012128
Subject(s) - response surface methodology , calcium , degradation (telecommunications) , chelation , chemistry , calcium alginate , chromatography , chemical engineering , inorganic chemistry , telecommunications , organic chemistry , computer science , engineering
Optimal conditions for microbial missile degradation of emulsified oil were predicted using the response surface method designed by Box-Behnken. The effects of the concentration of sodium alginate (SA), the concentration of calcium source (CaCO 3 ), the calcium ion chelator (CaCl 2 ), and the pH value on the degradation efficiency of oil pollution were investigated using calcium alginate gel as a matrix. The results show that the model fitting accuracy R 2 =0.9739, the concentration of SA, the concentration of calcium source, the concentration of calcium ion chelator and the pH value have a great influence on the response value of the degradation rate of emulsified oil. The model predicts that the optimal reaction conditions are SA concentration of 21.27 g/L, calcium source concentration of 29.71 g/L, calcium ion chelator concentration of 32.33 g/L, and pH is 8.56. The predicted degradation rate of emulsified oil reaches 71.50%. The model was further verified by experiments. The average value of the four experimental degradation rates under the optimal conditions was 71.61%, and the deviation was 0.11% compared with the predicted value. This proves that the method can be used to optimize the process parameters of microbial missiles to degrade the emulsified oil, provide optimized solutions for the treatment of actual oily wastewater.