Study on Removing Tannin in Blueberry Juice by Chemical Adsorption

In this study,the optimum conditions of gelatin and PVP to remove tannin in Blueberry juice were determined by orthogonal experiment.The optimum conditions for gelatin to adsorb tannin was listed as follows:adsorption temperature 30℃,adsorption time 30min,the dosage of 1%gelatin solution 10 mL/dL.The optimum conditions for PVP was as follows:adsorption temperature 30℃,adsorption time 25 min,thedosage of PVP 5 g/L.By employed those optimum conditions,the tannin removal rate achieved at 65.60%and 74.48%,respectively.