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Faculty of Technology, University of Nis , Niš , Serbia
Institute of Field and Vegetable Crops , Novi Sad , Serbia
Faculty of Technology, University of Nis , Niš , Serbia
Institute of Field and Vegetable Crops , Novi Sad , Serbia
Faculty of Technology, University of Nis , Niš , Serbia
Institute of Field and Vegetable Crops , Novi Sad , Serbia
Serbian Academy of Sciences and Arts, SASA Branch of Niš , Niš , Serbia
The residual oil extracted from a press cake, a by-product of fodder radish seed screw pressing, underwent extraction using n-hexane as an extracting solvent. The influence of various process parameters (solvent/press cake ratio: 3–10 mL/g, temperature: 20–70 °C, and processing time: 1–5 min) on the residual fodder radish oil yield. The response surface methodology alongside a 33 full factorial design with replication was used to optimize oil extraction. The second-order polynomial model was used to describe the statistical relationship between fodder radish residual oil yield and process variables, facilitating process optimization. Assessment by analysis of variance was employed to evaluate the impact of process variables on residual fodder radish oil yield. The developed model displayed high coefficients of determination (R2 = 0.938, Radj2 = 0.925, and Rpred2 = 0.907) and minimal mean relative percent deviation (≈±0.6% across 54 data points), affirming its reliability. This model predicted a maximum fodder radish oil yield of 23.8%, attainable across the following optimal process factors: temperatures of 70 °C, solvent/press cake ratios of 10 mL/g, and processing times of 5 min. The experimental residual fodder radish oil yield under these process conditions was 23.6%
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