Title: Extraction of insoluble dietary fiber from tea residue
Abstract: Tea residue was used as raw material.Based on the analysis results of main component in the tea residue,tea insoluble dietary fiber extraction technology with acid and alkali treatment and degreasing was studied.The results showed that the type of acid had no significant effect on insoluble dietary fiber content,while pH value had a significant effect.After investigated the single factor influencing regularities of the pH value of HCl solution and extraction temperature and time on insoluble dietary fiber content,optimized HCl hydrolyzation conditions with L9(34) orthogonal experiment are as follows: pH value is 1,temperature is 90 ℃ and time is 1.5 h.On the conditions,obtained initial product has an insoluble dietary fiber content of 31.27%,yield is 58.30%.Then the initial product hydrolyzed with NaOH solution.Based on the single factor influencing regularities of the pH value and extraction temperature and time on insoluble dietary fiber content,optimized NaOH extraction conditions are as follows: pH value is 13.5,temperature is 90 ℃ and time is 3 h.Obtained intermediate product has an insoluble dietary fiber content of 85.25%,yield is 21.47.The intermediate product further degreased by aether,final product has 91.32% insoluble dietary fiber,yield is 20.11%.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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