Method for shortening maize immersion time in cornstarch production process

A production process and corn soaking technology, applied in the field of corn deep processing, can solve the problems of high energy consumption, long soaking time and high production cost, and achieve the effects of low energy consumption, enhanced competitiveness, good social and economic benefits

Inactive Publication Date: 2009-02-25
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of long soaking time, high production cost, low production efficiency, high energy consumption, and large amount of wastewater discharge. At the same time, the released SO 2 Gas pollutes the environment, and sulfurous acid has a strong corrosive effect on equipment and pipelines, so it is necessary to innovate the soaking process.

Method used

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  • Method for shortening maize immersion time in cornstarch production process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select 3.5kg of whole corn with full grains, no insects, no mildew, remove impurities, wash three times, drain overnight, put it into a 10L multifunctional reaction kettle, add water with a mass ratio of 1:1 to corn Finally, add Alkaline protease (Alkalineprotease) produced by Novozymes Biotechnology Co., Ltd. at a ratio of 1200IU / g corn, add cellulase produced by Zhaodong Richeng Enzyme Preparation Co., Ltd. at 20IU / g corn, stir evenly, and adjust the air The compressor keeps the pressure of the reactor at 0.2MPa atmospheric pressure, adjust the steam generator and the cooling device in the reactor to maintain the temperature of the soaking liquid at 45°C, after soaking for 15 hours, remove the pressure, open the lid of the reactor, take out the soaked corn and soak liquid. The moisture content of the corn after soaking was measured to be 43.2%, the dry matter content in the soaking solution was 3.75%, the protein content in the soaking solution was 0.041 mg / mL, and th...

Embodiment 2

[0031] Select 3.5kg of whole corn with full grains, no insects, no mildew, remove impurities, wash three times, drain overnight, put it into a 10L multifunctional reaction kettle, add water with a mass ratio of 1:1 to corn Finally, add the acid protease (Acidprotease) produced by Ningxia Hersbit Biotechnology Co., Ltd. at a ratio of 1000IU / g corn, add cellulase produced by Zhaodong Richeng Enzyme Preparation Co., Ltd. at 20IU / g corn, stir evenly, and adjust the air The compressor keeps the pressure of the reactor at 0.2MPa atmospheric pressure, adjusts the steam generator and the cooling device in the reactor to keep the temperature of the soaking liquid at 45°C, after soaking for 12 hours. Remove the pressure, open the lid of the reactor, and take out the soaked corn and the soaking liquid. The moisture content of the corn after soaking was measured to be 44.5%, the dry matter content in the soaking solution was 3.85%, the protein content in the soaking solution was 0.043mg / m...

Embodiment 3

[0033] Select 3.5kg of whole corn with full grains, no insects, no mildew, remove impurities, wash three times, drain overnight, put it into a 10L multifunctional reaction kettle, add water with a mass ratio of 1:1 to corn Finally, add bromelain (Bromelain) produced by Nanning Pangbo Biological Engineering Co., Ltd. at a ratio of 1200IU / g corn, add cellulase produced by Zhaodong Richeng Enzyme Preparation Co., Ltd. at 20IU / g corn, stir evenly, and adjust the air compression Machine to keep the pressure of the reactor at 0.2MPa atmospheric pressure, adjust the steam generator and the cooling device in the reactor to keep the temperature of the soaking liquid at 45°C, after soaking for 15 hours. Remove the pressure, open the lid of the reactor, and take out the soaked corn and the soaking liquid. The moisture content of the corn after soaking was measured to be 43.3%, the dry matter content in the soaking solution was 3.7%, the protein content in the soaking solution was 0.041mg...

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Abstract

The invention relates to a method for shortening soak time of corn in the process of producing corn starch by combined soaking with high pressure and complex enzyme. The corn is soaked at the pressure of 0.1-0.5MPa and at the temperature of 30-60 DEG C for 10-20h with the adding amount of the protease being 450-1,350IU / g and the adding amount of the cellulose being 15-80IU / g, the water content of the soaked corn is 41.7%-45.3%, the yield of the corn starch is 69.2%-71.6%, the content of the dry matters in the soak solution is 3.6%-4.1%, and the protein content is 0.040-0.045mg / mL. The method overcomes the disadvantages of the conventional soaking process of long soaking time, high energy consumption, environmental pollution by SO2 gas, and the like, thus realizing production technical breakthroughs of low cost, high efficiency, low energy consumption and environmental protection, and improving the competitiveness of the corn starch and the downstream industries of China in the international market.

Description

technical field [0001] The invention belongs to the field of deep processing of corn, and in particular relates to a method for shortening the corn soaking time in the corn starch production process by utilizing high pressure and compound enzyme combined soaking. Background technique [0002] At present, the corn starch wet processing technology is the main technology adopted in the world. The first process involved in the processing process is the corn soaking process. The quality of the soaking effect and the length of the soaking time directly affect the processed starch products and other Yield, quality and production cost of by-products. [0003] The traditional corn soaking process generally adopts sulfurous acid at 48-53 ° C, in the intermittent operation of 8-12 soaking tanks for countercurrent circulation soaking, the soaking time is 36-48 hours, 1 ton of commercial corn consumes 157kJ of steam, and produces 0.7-1.0 tons Thin corn syrup. This method has the disadv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
Inventor 闵伟红
Owner JILIN AGRICULTURAL UNIV
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