Preparation method of pulp with high fruit sugar content

Abstract

The invention provides a preparation method of pulp with high fruit sugar content, which comprises the following steps: (1) soaking dried sweet potatoes or rice corns by water at the room temperature, grinding the dried sweet potatoes or the rice corns into pulp, and filtering the pulp by a filter sieve of more than 70 meshes; (2) regulating the pH value of the pulp to 5.5 to 5.6 by phosphoric acid, adding water to regulate the mass concentration to 30 to 35 percent, adding calcium chloride accessory agents and high-temperature resistance amylase, and uniformly stirring and mixing the mixture; (3) carrying out spraying liquefaction by the mixed pulp at 110 to 113 DEG C, reducing the temperature to 85 to 90 DEG C in 5 to 20 minutes, and then, liquefying the materials for 35 to 45 minutes; (4) carrying out filtration and deslagging; (5) adding maltogenic amylase and debranching enzyme for saccharification for 45 to 55 hours, and then, carrying out enzyme extinguishment and material discharge; (6) carrying out decolourization and filtration; (7) adding sodium phosphate solution into decolourization material liquid for regulating the pH value to 6.0 to 6.7, then, adding glucose isomerase for isomerization for 15 to 20 hours, and next, deactivating the glucose isomerase; (8) carrying out the ion exchange treatment; (9) concentrating obtained materials; and (10) carrying out package. The pulp with high fruit sugar content prepared by adopting the method of the invention has the advantages that the fruit sugar content in dry materials reaches 55 to 58 percent, and the starch conversion rate reaches 90 to 97 percent.

Description

technical field [0001] The invention relates to a method for preparing high fructose syrup, in particular to a method for preparing high fructose syrup with sweet potatoes and rice as raw materials. Background technique [0002] High fructose syrup (also known as high fructose syrup) is made of grains with high starch content as raw material, which is made into glucose by acid method or enzymatic method, and then part of the glucose is isomerized into fructose by glucose isomerase to form fructose and A mixed syrup of glucose. High fructose syrup is colorless and odorless, has good fluidity, is easy to use, has the characteristics of good chemical stability, good thermal stability, high osmotic pressure, strong moisture absorption and moisture retention. [0003] Sucrose is an important sugar source in the world, and the current annual output of sucrose in my country alone reaches 10 million tons, but excessive intake of sucrose is also more harmful to human body. [0004]...

AI Technical Summary

Problems solved by technology

At present, the main shortcomings in the production of high fructose syrup are three aspects: first, the production raw materials are limited to corn, and the technology of producing high fructose syrup with other raw materials is not fully mature; second, the conversion rate of starch is not high, and starch residue in by-products is relatively large The third is that the fructose content in the dry matter of the product is difficult to exceed 44%, that is, the isomerization effect is not ideal. If you want to further increase the fructose content, you must concentrate the fructose by chromatographic separation technology. Significantly increase the production cost of high fructose syrup