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Method for preparing carbohydrate and polypeptide products from potato starch wastewater

A potato starch and polypeptide technology is applied in the field of preparing sugar and polypeptide products, which can solve the problems of loss of organic matter, high processing cost, complicated process, etc., and achieves reduction of biochemical oxygen demand, realization of recycling, and simple treatment method. Effect

Inactive Publication Date: 2017-07-21
湖北金悦农产品开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the above characteristics, the process of treating potato starch wastewater by ordinary biochemical methods is relatively complicated, the treatment is not thorough, and the cost of treatment is relatively high; resulting in the loss of organic substances in potato starch wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of method that present embodiment provides utilizes potato starch wastewater to prepare sugar and polypeptide products, and its process is as follows:

[0028] The potato starch wastewater is filtered through a plate-and-frame filter in turn, concentrated by nanofiltration membrane equipment to a solid content of 2%, pumped into the enzymatic hydrolysis tank, and an appropriate amount of 8mol / L sodium hydroxide solution is added to adjust the pH value to 5.5 , adding a medium-temperature amylase whose mass is 0.01‰ of the weight of potato starch wastewater, and enzymatically hydrolyzing at 90°C for 2 hours, then lowering the temperature to 65°C, adding saccharification enzyme solution whose mass is 0.005‰ of the weight of potato starch wastewater, enzymatically hydrolyzing for 2 hours, and then Cool down to 55°C, add an appropriate amount of 10mol / L sodium hydroxide solution to adjust the pH value to 7.5, add neutral protease whose mass is 0.02‰ of the weight of p...

Embodiment 2

[0031] A kind of method that present embodiment provides utilizes potato starch wastewater to prepare sugar and polypeptide products, and its process is as follows:

[0032] The potato starch wastewater is filtered through a plate-and-frame filter in turn, concentrated by nanofiltration membrane equipment to a solid content of 3%, pumped into the enzymatic hydrolysis tank, and an appropriate amount of 10mol / L sodium hydroxide solution is added to adjust the pH value to 6.0 , adding a medium-temperature amylase whose mass is 0.025‰ of the weight of potato starch wastewater, and after enzymatic hydrolysis at 85°C for 1 hour, cooling down to 55°C, adding saccharification enzyme solution whose mass is 0.015‰ of the weight of potato starch wastewater, and enzymatically hydrolyzing it for 1 hour, and then Cool down to 50°C, add an appropriate amount of 12mol / L sodium hydroxide solution to adjust the pH value to 7.0, add neutral protease whose mass is 0.04‰ of the weight of potato sta...

Embodiment 3

[0035] A kind of method that present embodiment provides utilizes potato starch wastewater to prepare sugar and polypeptide products, and its process is as follows:

[0036] The potato starch wastewater is filtered through a plate-and-frame filter in turn, concentrated by nanofiltration membrane equipment to a solid content of 5%, pumped into the enzymatic hydrolysis tank, and an appropriate amount of 12mol / L sodium hydroxide solution is added to adjust the pH value to 6.5 , adding a medium-temperature amylase whose mass is 0.04‰ of the weight of potato starch wastewater, and after enzymolysis at 80°C for 0.5h, cooling to 55°C, adding saccharification enzyme solution whose mass is 0.03‰ of the weight of potato starch wastewater, and enzymolysis for 1h, Then lower the temperature to 50°C, add an appropriate amount of 10mol / L sodium hydroxide solution to adjust the pH value to 7.5, add neutral protease whose mass is 0.06‰ of the weight of potato starch wastewater, and then enzyma...

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Abstract

The invention provides a method for preparing carbohydrate and polypeptide products from potato starch wastewater, belonging to the field of processing methods for carbohydrates and polypeptides. The method comprises the following steps: successively carrying out filtering and concentration on the potato starch wastewater so as to obtain a first solution; then successively adding medium-temperature amylase, glucoamylase and neutral protease into the first solution for enzymatic hydrolysis three times so as to obtain a fourth solution; and successively subjecting the fourth solution to high-temperature enzyme deactivation, concentration and spray drying so as to obtain products containing carbohydrates and polypeptide polypeptides. Through treatment of the potato starch wastewater with bioenzyme, the method overcomes problems in treatment and discharge of the potato starch wastewater, extracts organic substances in the wastewater and improves the utilization rate of resources.

Description

technical field [0001] The invention relates to a sugar and polypeptide processing method, in particular to a method for preparing sugar and polypeptide products from potato starch wastewater. Background technique [0002] my country's potato starch processing industry has developed rapidly in recent years. According to surveys, there are currently more than 2,000 starch production enterprises in the country, with an annual processing capacity of more than 8 million tons of potatoes, of which the annual processing capacity of potato starch is more than 1.2 million tons. There are three main products in the potato starch production process: the main product is potato starch, and the by-products are potato residue and production wastewater. Among them, the treatment process of potato residue is very simple and not easy to cause pollution. Potato starch wastewater contains a large amount of organic compounds, such as protein and sugar, and also contains some starch granules, fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/02C12P19/14C12P19/22C12P21/06
CPCC12P21/06C12P19/02C12P19/14C12P19/22
Inventor 郭鹏王轶郑丹赵明明周明陈全秀胡杰
Owner 湖北金悦农产品开发有限公司