Method for treating starchy raw material and method for preparing citric acid

A technology of starchy raw materials and processing methods, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve problems such as difficult gelatinization, difficult liquefaction of starchy raw materials, and unfavorable effects of glucoamylase , to achieve the effect of facilitating saccharification, shortening the fermentation cycle, and reducing the content of residual starch
CN102321704AInactive Publication Date: 2012-01-18COFCO BIOTECHNOLOGY CO LTD
2 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
COFCO BIOTECHNOLOGY CO LTD
Publication Date
2012-01-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention relates to a method for treating a starchy raw material and a method for preparing citric acid. The method for treating the starchy raw material comprises the following steps of: mixing powder of the starchy raw material and water to obtain farinaceous size, and mixing the farinaceous size and first part amylase to obtain a mixture; performing primary injection on the mixture by using first steam at the temperature of between 80 and 100 DEG C to obtain primary emulsion, and performing secondary injection on the primary emulsion by using second steam at the temperature of between120 and 150 DEG C to obtain secondary emulsion; performing flash evaporation and reducing the temperature; and mixing a product obtained through flash evaporation and temperature reduction and secondpart amylase, and performing enzymolysis. By the method, a dextrose equivalent (DE) value can be reduced, and the fermentation period of the citric acid can be shortened.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for processing starchy raw materials and a method for preparing citric acid. Background technique

[0002] Citric acid is an organic acid widely used in industries such as beverage, food and medicine. At present, citric acid is mainly prepared by fermentation. Generally, the starchy raw material is first pulverized, and the pulverized product is mixed with water to obtain a starch slurry, and the starch slurry is mixed with an enzyme for enzymolysis to obtain an enzymatic hydrolysis product (enzymolysis liquefaction solution) , and inoculate Aspergillus niger into the fermentation broth containing the enzymatic hydrolysis product to ferment to produce citric acid.

[0003] In the above process, the enzymatic hydrolysis (liquefaction) of starchy raw materials has a greater impact on the fermentation cycle of citric acid. The current enzymatic hydrolysis (liquefaction) process of starchy raw materials mostly adopts the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More