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Method for preparing sugar and ethanol by use of sweet potato wastes

A technology of waste and sweet potato residue, which is applied in the direction of biochemical equipment and methods, methods based on microorganisms, microorganisms, etc., can solve the problems of inability to fully utilize raw materials, and achieve improved bioavailability, huge economic and social benefits, and process low cost effect

Active Publication Date: 2013-12-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned technical scheme is a way to utilize sweet potato waste, there is still a large amount of waste to be produced, and the raw materials cannot be fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Penicillium oxalicum (Penicillium oxalicum) in Example 1 was purchased from the General Microorganism Center (CGMCC) of the China Committee for Culture Collection of Microorganisms, with a culture preservation number of 5302.

Embodiment 2

[0033] Aspergillus aculeatus in Example 2 was purchased from the American Type Culture Collection (ATCC) with a strain deposit number of 1015.

[0034] Raw material description

[0035] The sweet potato waste residue was purchased from a starch factory in Linyi, Shandong Province. The water content was 10wt%, and the solid content was: starch 50wt%, crude protein 2wt%, crude fat 2wt%, ash 10wt%, cellulose and hemicellulose and Other ingredients 36wt%.

[0036] Enzyme source

[0037] α-amylase was purchased from Novozymes China Co., Ltd.;

[0038] Glucoamylase: purchased from Shandong Longda Biological Engineering Co., Ltd.;

[0039] High temperature resistant yeast: purchased from Hubei Yichang Angel Yeast Co., Ltd.

[0040] Example 1

[0041] A method for producing sugar and ethanol from sweet potato waste, comprising the steps of:

[0042] (1) Take 50 g of sweet potato waste residue (by dry weight), add water to make a solution with a mass percentage of 20%, and prepar...

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PUM

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Abstract

The invention relates to a method for preparing sugar and ethanol by use of sweet potato wastes. The method includes the first step of taking sweet potato waste residues and adding water in the sweet potato waste residues or taking wet residues of sweet potato waste residues to prepare preprocessed sweet potato waste residues, the second step of adding a microbial nutrient solution in the sweet potato waste residues to carry out enzymolysis, then adding alpha-amylase to carry out hydrolysis, and then adding saccharifying enzyme in the sweet potato waste residues per gram to carry out hydrolysis, and then preparing glucose mash, and the third step of adding high temperature resistant yeast in the glucose mash to carry out stationary culture and alcoholic fermentation, and then preparing the ethanol after purification and separation. According to the method, the microbial nutrient solution, the alpha-amylase and the saccharifying enzyme are utilized and jointly act on a plurality of polysaccharide sweet potato waste residues containing starch, fibers, hemicellulose, pectin and the like. Polysaccharide in the sweet potato waste residues can be quickly degraded by polysaccharide degrading enzymes in the microbial nutrient solution to become soluble sugars, therefore, the viscosity of the sweet potato waste residues is reduced, the sweet potato waste residues can be fully transformed into fermentable sugars, and the biotransformation efficiency of the raw materials is improved.

Description

technical field [0001] The invention relates to a method for preparing sugar and ethanol from sweet potato waste, and belongs to the technical field of starch processing waste utilization. Background technique [0002] Food and economic crops widely planted in our country, such as cereals and potatoes, are usually used as raw materials for starch production because of their strong adaptability, high yield and low price. However, after starch is extracted, a large amount of waste residue produced is rich in starch, dietary Rich in nutrients such as fiber and protein, the water content is generally high, so it is very easy to ferment and spoil, causing serious pollution to the surrounding environment. To sum up, finding a method that can quickly and effectively degrade waste residues and greatly increase the hydrolysis yield of starch, so as to realize the reuse of agricultural and sideline products resources and protect the environment, is the most important task at present. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12P19/14C12P19/02C12R1/865
CPCY02E50/16Y02E50/10
Inventor 方诩侯少莉刘莎莎牛康乐
Owner SHANDONG UNIV
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