Composite method corn soaking method for corn starch production

Abstract

The present invention discloses a composite method corn soaking method for corn starch production. According to the composite method corn soaking method, by using the synergistic compounding action of an acid, an alkali, a salt and cellulase, the problem that the traditional soaking solvent is single is solved, and the characteristics of convenient operation, simpleness, reliability, production cost saving and convenient production control and management are provided; and in order to ensure the stable corn starch quality and provide the premise and the assurance for the improvement of the economic benefits of enterprises, the method comprises: determining a feeding amount, calculating a corn dry substance content, preparing a soaking solvent, preparing a sulfurous acid solution, dissolving liquid-stage sulfur dioxide in water to achieve a concentration of 0.15-20%, preparing a sodium hydroxide solution, dissolving solid sodium hydroxide in water to achieve a concentration of 15%, adding the sulfurous acid solution to corn to be soaked to achieve a liquid level 20-30 cm higher than the grain surface, heating to a temperature of 50 DEG C, adding the sodium hydroxide to the soaking liquid, adjusting the pH value of the soaking liquid to 4.5-5.0, adding liquid cellulase with enzyme activity of 40000 U according to 1/100000 of the corn dry substance to be soaked, and soaking the corn for 24 h at a constant temperature of 50 DEG C so as to meet the quality requirement.

Description

technical field [0001] The invention relates to the technical field of corn starch production, and directly relates to a corn soaking method. Background technique [0002] At present, the production of corn starch in China adopts the wet milling production process, and there are two methods of corn soaking: one is the traditional soaking method, adding sulfurous acid solution with a concentration of 0.25% to 0.35% into the corn to be soaked, Heat to 48---52 degrees, and keep at constant temperature for 48---72 hours. Moreover, every 8 hours, it is necessary to pour back water to supplement the temperature. This method takes a long time, consumes a lot of energy, and the soaking solvent is single, and the quality of corn soaking is unstable, resulting in fluctuations in the production process of corn starch and large fluctuations in product quality. Affect production, increase costs, and restrict the improvement of economic benefits of enterprises. [0003] The second is t...

AI Technical Summary

Problems solved by technology

This method requires strict conditions and complicated strain selection and cultivation

Moreover, the addition of pre-soaking and pre-crushing not only increases the complexity of the operation, but also cannot effectively shorten the time, let alone save energy consumption, reduce costs, and cannot meet the needs of large-scale continuous production.