| abstract |
The invention relates to a preparation method for improving the fermentation efficiency of citric acid. The starch raw material is liquefied and then added with saccharification enzyme, fungal enzyme, xylanase and acid protease for enzymatic hydrolysis to convert dextrin and oligosaccharide into reducing sugar as much as possible. , convert part of the corn protein into amino acids, and the obtained saccharified hydrolyzate is used for the production of citric acid by fermentation of Aspergillus niger, and saccharification enzyme, fungal enzyme, xylanase and acid protease are added in the early stage of the fermentation process. Using the method to ferment and produce citric acid can effectively improve the fermentation conversion rate, reduce the residual total sugar in the fermentation liquid, reduce the production grain consumption and save the production cost. |