Pretreatment Of Rice Wine By Liquid Fermentation And Optimization Of Fermentation Conditions

The liquid fermentation technology of rice wine is the basis for the big-cans rapid fermentation of rice wine.By studying the liquid fermentation process of rice wine,rapid liquid fermentation of rice wine is achieved,and the relative balance between acid and ester is ensured.This has important implications for improving the production efficiency of rice wine,reducing the production cost,and increasing the output and profits of enterprises.The paper explores the raw material pretreatment scheme that affects rice wine fermentation,and obtains the optimal clinker pretreatment scheme and the direction of raw material pretreatment.Based on this,the basic process of liquid fermentation of rice wine is studied,and the selection process of rice wine brewing is selected.The main influencing factors were designing combination experiments to optimize the rapid liquid fermentation process of rice wine.On this basis,the fermentation process of rice wine was further explored and studied.The fermentation process of rice wine was detected by conventional methods and chromatography methods.A better direction of fermentation process optimization was found to provide theoretical support and directional guidance for further research.Through research,a raw material pretreatment scheme for liquid fermentation of clinker and raw meal was found.Adding glucoamylase to pre-saccharification based on the conventional clinker fermentation can increase the alcohol content by 10.62%.The rice was crushed into rice pulp and then steamed and saccharified and fermented to increase the dispersion and liquefaction level of the mash,and the alcoholicity was further increased by 9.31%.The fermentation method using raw material saccharification and saccharification promoted the mass transfer of the fermentation process,which increased the alcohol content by 8.61% over that of the pulping clinker.Raw material crushing and saccharification and fermentation can save energy.After crushing,the rice crushing is more uniform in the dispersion system,and the liquidity is good.It is suitable for large tank mixing and fermentation,and provides ideas and methods for winery big tank fermentation,increasing production and shortening cycle.We explored the combination of fermentation conditions that had a great influence on the rice wine brewing process,conducted single-factor experiments and designed a suitable gradient of four factors and three levels of orthogonal experiments.The raw material was crushed and fermented at a shaker speed of 160 rpm,a feed water ratio of 1:2.5,Under the conditions of p H 3.3 before fermentation and 3 times the amount of enzyme added to the fermentation of clinker,the best fermentation conditions under comprehensive consideration of product quality,production efficiency,and economic benefits can result in better alcohol accumulation and better balance of acids and esters of liquid-fermentationed rice wine.From the aspects of dissolved oxygen,reducing sugar content,stirring conditions,etc.,the fermentation process is further explored and optimized.Proper oxygenation in the early stage of fermentation to increase the amount of dissolved oxygen in the raw materials can promote the growth of microorganisms in the early stage of fermentation,promote the generation of related enzymes and the early conversion of raw materials;while the feed fermentation enhances the reducing sugar content in the raw materials during fermentation,but not only the production cost is increased,and the total acid in the fermentation result is too high,which affects the overall flavor of the wine.The fermentation with the stirring-static-stirring scheme not only promotes the activity of the relevant enzymes in the early stage of fermentation,but also improves the glucoamylase activity and fermentation capacity.,Promote the early conversion of raw materials,while increasing the production of 5.04% alcohol,shorten the fermentation cycle of about 2-3 days,also reduced the mixing time to a certain extent,the relative reduction in production costs,in the actual industrial production has a certain guiding significance.