Optimization of Walnut Nut Extraction Yield by using the Response Surface Methodology

Rabi?a Lotfi, D. Zakarya

Abstract: This study focuses on improving the aqueous extraction of walnut brown. Optimal extraction conditions, i.e. pH, temperature and duration, were determined using an orthogonal Composite Centred Design (CCD) with iso-rotation. The ANOVA results indicated that pH has a linear and quadratic effect, temperature, and interaction terms (Duration-pH), (T?-Duration), have a significant influence on extraction yield. In addition, the proposed second-order regression model is consistent with the experimental data with a high coefficient of determination ( R- square (adjusted) = 96.53%). According to the response optimization of Statgraphycs software, the optimum conditions for extraction of walnut brown are: pH 8, temperature 80 ?C and extraction time 9 minutes. Under these conditions, the experimental extraction yield is 96%, which is close to the value predicted by the statistical design (102%).

Keywords: Modelization, Extraction, Walnut, Experimental Design, Optimization

How to Cite?: Rabi?a Lotfi, D. Zakarya, "Optimization of Walnut Nut Extraction Yield by using the Response Surface Methodology", Volume 11 Issue 11, November 2022, International Journal of Science and Research (IJSR), Pages: 500-504, https://www.ijsr.net/getabstract.php?paperid=SR221107003203, DOI: https://dx.doi.org/10.21275/SR221107003203