Modeling calcium and water intake in threshed corn grain during thermo-alkaline treatment

► The simultaneous diffusion of water and calcium in the threshed corn grain was modeling. ► The effective diffusion coefficient decreased when the Ca(OH)2 concentration was increased. ► The reaction rate constants were approximately 10 times - larger for water than for calcium. ► Low concentration of Ca(OH)2 did not significantly affect the water diffusion in threshed corn.