Research On The Key Processing Technology Of Apple-oats Juice Compound Beverage

In order to prepare a cereal-fruit complex beverage with bright color,unique aroma,delicious taste,and rich nutrients,this paper selects apple concentrated juice and enzymolysis oat meal as raw materials to prepare an apple-oats juice compound beverage.In the experiment,the formulation of raw materials for beverages,the preparation process,and the optimization of key processes were studied,combined with the nutritional and sensory qualities of drinks and the shelf life requirements,the following research results were obtained:The preparation process of apple-oat compound beverage was determined as follows: oat flour,apple juice concentrate,pure water,etc.?beating?adjusting taste?homogenate?packing?heat sterilization?cooling? testing.The best formula of apple-oat compound beverage is: concentrated apple juice(sweetness 70°Brix;acidity 1.9%)9%,enzymolysis oat flour 5%,xanthan gum 0.15%,carboxymethylcellulose sodium 0.15%,pure Water 85.7%,fructose syrup 0.15%,citric acid 0.077%,sodium citrate 0.051%,malt extract 0.03%.Through the determination of the content of each basic component of the raw materials,from the nutritional point of view,the whole oat powder can be replaced with enzymolysis oat meal.The nutrient of Tianshui Huaniu apple concentrated juice is full-scale,which is suitable as a good raw material for apple-oat compoound beverage.The key process of the beverage is: mix the enzymolysis oat meal,xanthan gum,and sodium carboxymethyl cellulose in the optimal formula ratio firstly,dry the material thoroughly with a multi-functional food processor for 10 min,and then adjust the titratable acidity to 1.60%~2.0%.Concentrated apple juice and purified water were blended with multi-functional cooking,adjusted for taste,homogenous(pressure 40 MPa,twice homogenized),and packed(every individual package should be filled with material as much as possible,in order to ensure the ultra-high pressure sterilization effect).The non-heat and ultra-high pressure sterilization process was performed.The sterilization process parameters are: first boost to 300 MPa,and maintain the pressure for 7 min after the pressure was rapidly raised to 600 MP after 3 min.The shelf life of the samples prepared under the key process conditions can reach 12 months or more.The samples stored in the constant temperature box at 35°C were stable in terms of sugar content,acidity,and total number of colonies,and the tissue state was stable.The color began to deepen when the temperature was stored for 75 days.The samples stored at room temperature were stable in terms of sugar content,acidity,and total number of colonies.The tissue state was uniform and stable,and there was no stratification.The color of the sample was gradually deepened with the storage time when it was stored at room temperature for 15 months.