Study on enzymatic hydrolysis process of non-starch polysaccharides of rice bran meal in vitro
XUAN Li
QUAN Zhi-zhong
Abstract：The experiment aims to study the effects of xylanase,cellulase,and phytase on the degradation of non-starch polysaccharides in rice bran through in vitro enzymatic pre-digestion treatment.Experiment with defatted rice bran as the raw material,using single-factor experiments and response surface methodology to optimize the process conditions for the degradation of non-starch polysaccharides in rice bran by xylanase,cellulase,and phytase.The results showed that the optimum conditions for degradation of non-starch polysaccharides in rice bran meal in vitro were:pH value 3.7,temperature 50 ℃,xylanase content 2.0％,cellulase content 1.0％,phytase content 1.8％and enzymatic hydrolysis time 3.5 h.After enzymatic hydrolysis pretreatment,the reducing sugar in rice bran meal was increased by 7 531％,inositol was increased by 1 620％,the degradation rates of neutral detergent fiber,acid detergent fiber,acid detergent lignin and crude fiber were 47.4％,24.0％,12.1％and 21.3％,respectively,the degradation rates of phytic acid was 99.9％.The study indicates that enzymatic hydrolysis predigestion technology in vitro effectively reduced the content of anti-nutrition factors in rice bran meal and improved the nutritional value of rice bran meal.
Keywords：rice bran mealnon-starch polysaccharidesxylanasecellulasephytase
Publication Date：2024-10-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 69-74 )