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Method for preparing sugar

A technology of saccharification and starch slurry, which is applied in the field of wet sugar production, can solve the problems of large water consumption and unsatisfactory DE value of the light transmittance of sugar solution, and achieve the effect of saving liquefaction and saccharification effects

Inactive Publication Date: 2016-01-27
COFCO FOOD SCI & TECH WUHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional corn wet sugar production process uses a closed filter containing diatomite to separate sugar liquid and sugar residue. In order to fully recover sugar, it is necessary to wash the diatom earth in the closed filter, which consumes a lot of water and the sugar liquid obtained Light transmittance (as low as 78%) and DE value (about 95%) are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add water to the starchy raw material to adjust the dry matter content to be 35% by weight, add calcium hydroxide to adjust pH=6.0, add α-amylase (add 420g of α-amylase per ton of dry matter), stir well and beat with a pump Enter the liquefaction injector, the mass ratio of starch slurry to steam after adding enzyme is 1:0.13, the liquefaction temperature is 115°C, the liquefaction time is 2.3h, and the DE value of the obtained liquefaction liquid is 14%.

[0030] Put the liquefied liquid obtained after liquefaction into the saccharification tank, add glucoamylase (4060 compound glucoamylase produced by Genencor, add 550 g of glucoamylase per ton of dry matter) at 60 ° C, pH value 4.4, stir for 48 hours, that is To the end of saccharification (DE value 98.3%).

[0031] The saccharification liquid obtained after saccharification is subjected to diatomite airtight filtration (temperature is 58°C, pressure is 0.4MPa) to obtain clear liquid and residue, and then the residue...

Embodiment 2

[0033] Add water to the starchy raw material to adjust the dry matter content to 40% by weight, add calcium hydroxide to adjust pH=6.0, add α-amylase (add 450g of α-amylase per ton of dry matter), stir well and beat with a pump Enter the liquefaction ejector, the mass ratio of starch slurry to steam after adding enzyme is 1:0.13, the liquefaction temperature is 120°C, the liquefaction time is 2.1h, and the DE value of the obtained liquefaction liquid is 16%.

[0034]Put the liquefied liquid obtained after liquefaction into the saccharification tank, add glucoamylase (4060 compound glucoamylase produced by Genencor, add 600 g of glucoamylase per ton of dry matter) at 70 ° C, pH value 4.2, and stir for 36 hours, that is To the end of saccharification (DE value 98.6%).

[0035] The saccharification liquid obtained after saccharification is subjected to diatomite airtight filtration (temperature is 59°C, pressure is 0.5MPa) to obtain clear liquid and residue, and then the residue ...

Embodiment 3

[0037] Add water to the starchy raw material to adjust the dry matter content to be 38% by weight, add calcium hydroxide to adjust pH=6.0, add α-amylase (add 430g of α-amylase per ton of dry matter), stir well and beat with a pump Enter the liquefaction injector, the mass ratio of starch slurry to steam after adding enzyme is 1:0.13, the liquefaction temperature is 110°C, the liquefaction time is 2.4h, and the DE value of the obtained liquefaction liquid is 12%.

[0038] Put the liquefied liquid obtained after liquefaction into the saccharification tank, add glucoamylase (4060 compound glucoamylase produced by Genencor, add 650 g of glucoamylase per ton of dry matter) at 62 °C and pH 4.3, and stir for 40 hours, that is To the end of saccharification (DE value 98.5%).

[0039] The saccharification liquid obtained after saccharification is subjected to diatomite airtight filtration (temperature is 60°C, pressure is 0.2MPa) to obtain clear liquid and residue, and then the residue...

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Abstract

The invention discloses a method for preparing sugar. The method comprises the following steps: preparing a starch slurry from a starchy raw material, liquefying and saccharifying the starch slurry, carrying out diatomite closed filtration on the obtained saccharified solution to obtain a clear liquid and residues, carrying out press filtration on the residues, and mixing a liquid phase obtained after the press filtration with the clear liquid. Washing of diatomite with water is not needed in the invention by adopting the above technical scheme, so the energy consumption is small, and the quality of the obtained saccharified solution is high (the light transmittance and the DE value are high). In the preferable embodiment of the invention, high efficiency liquefaction of the starch slurry with high content (32-40wt%) of dry substances can be realized through adjusting a liquefaction technology, so water consumption in the slurry mixing process is saved (at least 45,000t is saved every year for a production line consuming 130,000t of the starchy raw material every year) on the premise of guaranteeing good liquefaction and saccharification effects).

Description

technical field [0001] The invention relates to the field of sugar production, in particular to a method for wet sugar production using starchy raw materials. Background technique [0002] Corn starch is widely used in feed, starch sugar and other corn deep-processing industries. my country is a large producer of starch and starch sugar, of which the annual output of starch sugar exceeds 6 million tons. Most of the production processes adopt the corn wet sugar production process. The corn wet sugar production process refers to the process of beating, liquefying, saccharifying and separating sugar liquid and sugar residue after soaking corn particles in water. Wherein the step of separating sugar liquid and sugar residue directly affects the purity, concentration and production cost of sugar liquid. [0003] The traditional corn wet sugar production process uses a closed filter containing diatomite to separate sugar liquid and sugar residue. In order to fully recover sugar, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
Inventor 陈绍辉
Owner COFCO FOOD SCI & TECH WUHAN CO LTD