Modelling and Optimization of Dry Extraction Conditions of Sage Seed Gum

In this research, sage seed gum was extracted using the dry method (friction-based) and the extraction conditions was optimized by the response surface method and using the box-Behnken design. Dry extraction method was used to achieve an economical, inexpensive, fast, eco-friendly (green technology), continuous, easy usage and automated method. The independent variables in this research were rotor speed (750, 825, 900 rpm), angle of friction (0, 10, 20 degree) and friction distance (1.5, 2, 2.5 mm). The effects of these variables on extraction yield, protein content and apparent viscosity (at a shear rate 46 1/s) were investigated. The results showed that quadratic polynomial models adequately explained the data variation and represented the actual relationship between independent variables and responses. The optimum conditions with maximum extraction yield and apparent viscosity and minimum protein content were achieved when the rotor speed, angle of friction and friction distance were 900 rpm, 6.9 degree, 2.2 mm, respectively. At the optimized conditions, the extraction yield, protein content and apparent viscosity were obtained 10.61%, 7.02%, and 112 mPa.s, respectively