CN107488588B - Saccharification process and saccharification system for improving glucose yield - Google Patents
Saccharification process and saccharification system for improving glucose yield Download PDFInfo
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Abstract
The invention relates to a saccharification process and a saccharification system for improving glucose yield, wherein the saccharification process comprises the following steps: conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 28% -30%, slowly adding a sodium carbonate solution into the pH adjusting tank, after stirring uniformly, heating the mother liquor to 60-62 ℃ by utilizing a heat exchanger when the pH is 4.2-4.5, conveying the mother liquor and saccharifying enzyme into the saccharifying tank for saccharification, wherein the saccharification time is 40h, stirring is carried out when the saccharification is 0-3h, 10-10.5h, 20-20.5h and 30-30.5h, and the rotating speed is 40 r/min, and conveying the saccharified material into a decolorizing device. The saccharification process of the invention improves the yield of glucose, the increase range of the yield of glucose is more than 1%, and the purity of the product is improved; the saccharification process and the production system are matched mutually, so that the saccharification time is shortened, and the economic benefit is improved.
Description
Technical Field
The invention relates to a saccharification process and a saccharification system for improving glucose yield, and belongs to the technical field of corn deep processing.
Background
Corn is one of the main food crops worldwide, and is widely concerned due to its abundant output and renewable resource advantages, and the corn deep processing industry is also known as the "gold industry". The end products of the corn deep processing industry comprise corn starch and derivative series taking the starch as a sugar-making raw material, and mainly comprise modified starch, starch sugar, maltose, fructose syrup, sugar alcohol and the like. Glucose, which is one of the starch sugars, is also the most widely distributed and important monosaccharide in nature, and is a polyhydroxy aldehyde. Pure glucose is colorless crystals, has sweet taste but less sweet than sucrose, is easily dissolved in water, is slightly dissolved in ethanol, and is insoluble in diethyl ether. Glucose has an important role in the field of biology, being an energy source for living cells and an intermediate product of metabolism, i.e. a main energy supply substance for organisms. Plants produce glucose by photosynthesis. Has wide application in the fields of candy manufacturing and medicine.
The theoretical yield of glucose produced by the corn starch double-enzyme method is 111%, and the yield of advanced enterprises in industry is about 95%. In the prior art, the crystalline glucose is produced by a double-enzyme method, the mother liquor is directly recycled by the traditional process, the purity of the mother liquor is low, the amount of mixed sugar is large, the mother liquor recycling amount is reduced, a large amount of mother liquor is sold, the product yield is reduced, the production cost is increased, the normal production is seriously influenced, and certain economic loss is caused for enterprises.
Disclosure of Invention
The invention aims to provide a saccharification process and a saccharification system for improving glucose yield, wherein the saccharification process and the saccharification system are used for improving the glucose yield according to 18-20% of the impurity sugar content in glucose mother liquor; wherein disaccharide is 11-14%, and the other is trisaccharide and polysaccharide. And decomposing alpha-1, 6 glycosidic bonds by utilizing composite saccharifying enzyme, and further decomposing small molecular substances to finally obtain glucose molecules.
The technical scheme of the invention is as follows:
a saccharification process for improving glucose yield comprises the following specific steps:
conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 28% -30% by pure water, preparing sodium carbonate solution with the concentration of 10% in a sodium carbonate dissolving tank, slowly adding the sodium carbonate solution into the pH adjusting tank, after uniformly stirring, heating the mother liquor to 60-62 ℃ by using a plate heat exchanger when the pH is 4.2-4.5, conveying the mother liquor and saccharifying enzyme into a saccharifying tank, wherein the flow ratio of the saccharifying enzyme to the mother liquor is 15-18:148000, the saccharifying time is 40h, the saccharifying time is 0-3h, stirring is carried out for 10-10.5h, 20-20.5h and 30-30.5h, and conveying the saccharified material into a decolorizing device at the rotating speed of 40 r/min; preferably, the concentration of the mother solution is regulated to 29.1% by pure water in a pH regulating tank, a sodium carbonate solution with the concentration of 10% is prepared in a sodium carbonate dissolving tank, and the sodium carbonate solution is slowly added into the pH regulating tank, and after uniform stirring, the pH is 4.42; the flow ratio of saccharifying enzyme to mother liquor was 16.6:148000.
Further, the saccharifying enzyme is a compound saccharifying enzyme; preferably, the ratio of the black yeast saccharifying enzyme to the pullulanase debranching enzyme in the composite saccharifying enzyme is 1:100, and the composite saccharifying enzyme shortens the saccharifying time and reduces the production cost.
The invention also comprises a saccharification system for improving the glucose yield, which comprises a pure water tank, a sodium carbonate dissolving tank, a pH adjusting tank, a heat exchanger, a saccharifying enzyme storage tank and a saccharifying tank; the pure water tank and the sodium carbonate dissolving tank are respectively connected with the top of the pH adjusting tank through a high-pressure pump, the top of the pH adjusting tank is provided with an inlet of glucose mother liquor, the bottom of the pH adjusting tank is connected with a heat exchanger through the high-pressure pump, the heat exchanger is connected with the top of the saccharification tank through a pipeline A by a metering pump A, the saccharification enzyme storage tank is connected with the pipeline A by a metering pump B, and the bottom of the saccharification enzyme is connected with a decoloring device through the high-pressure pump.
Further, the heat exchanger is a plate heat exchanger, preferably, the heat exchanger is 2 heat exchangers of 200m 2 Is a plate heat exchanger; the plate heat exchangers are connected in parallel, and the structure is favorable for uniform heat exchange of the mother liquor after pH adjustment.
Further, a plurality of saccharification tanks are arranged and connected in parallel; preferably, 10 saccharification tanks are arranged, and the structure is favorable for saccharification of glucose mother liquor rapidly and efficiently.
Further, the stirring device in the saccharification tank is a straight blade stirrer, and the structure is not only beneficial to uniform stirring of materials, but also avoids generating bubbles.
Compared with the prior art, the invention has the following advantages:
the saccharification process of the invention improves the yield of glucose, the increase range of the yield of glucose is more than 1%, and the purity of the product is improved; the saccharification process and the production system are matched mutually, so that the saccharification time is shortened, and the economic benefit is improved.
Drawings
FIG. 1 is a flow chart of the mother liquor saccharification process.
Symbol description
1. Pure water tank, 2 sodium carbonate dissolving tank, 3 pH adjusting tank, 4 heat exchanger, 5 saccharifying enzyme storage tank, 6 saccharifying tank, 7 high-pressure pump, 8 metering pump A, 9 metering pump B, 10 pipeline A, 11 decolorizing device, 12 stirring device.
Detailed Description
The invention will be further described with reference to specific embodiments, and advantages and features of the invention will become apparent from the description. The embodiments are merely exemplary and do not limit the scope of the invention in any way.
Example 1 saccharification Process for increasing glucose yield
The method comprises the following specific steps:
conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 29.1% by pure water, preparing sodium carbonate solution with the concentration of 10% in a sodium carbonate dissolving tank, slowly adding the sodium carbonate solution into the pH adjusting tank, after uniformly stirring, heating the mother liquor to 60.8 ℃ by using a plate heat exchanger at the pH of 4.42, conveying the mother liquor and saccharifying enzyme into a saccharifying tank, wherein the flow ratio of the saccharifying enzyme to the mother liquor is 16.6:148000, the saccharifying time is 40h, the saccharifying time is 0-3h, the stirring is carried out at 10-10.5h, the stirring is carried out at 20-20.5h and the stirring is carried out at 30-30.5h, and the rotating speed is 40 r/min, and conveying the saccharified material into a decolorizing device;
the saccharifying enzyme is compound saccharifying enzyme, wherein the ratio of black yeast saccharifying enzyme to pullulanase debranching enzyme is 1:100.
The saccharification system used in the saccharification process comprises a pure water tank 1, a sodium carbonate dissolving tank 2, a pH adjusting tank 3, a heat exchanger 4, a saccharifying enzyme storage tank 5 and a saccharifying tank 6 as shown in figure 1; the pure water tank 1 and the sodium carbonate dissolving tank 2 are respectively connected with the top of the pH adjusting tank 3 through a high-pressure pump 7, the top of the pH adjusting tank 3 is provided with an inlet of glucose mother liquor, the bottom of the pH adjusting tank 3 is connected with the heat exchanger 4 through the high-pressure pump 7, the heat exchanger 4 is connected with the top of the saccharification tank 6 through a metering pump A8 through a pipeline A10, the saccharification enzyme storage tank 5 is connected with the pipeline A10 through a metering pump B9, the bottom of the saccharification tank 6 is connected with the decoloring device 11 through the high-pressure pump 7, and a stirring device 12 is arranged in the saccharification tank 6;
the number of the heat exchangers 4 is 2 and 200m 2 The plate heat exchangers are connected in parallel; the saccharification tank 6 is provided with a plurality of saccharification tanks which are connected in parallel; sugarThe stirring device 12 in the melting tank 6 is a straight blade stirrer.
Example 2 saccharification Process for increasing glucose yield
The method comprises the following specific steps:
conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 29.3% by pure water, preparing sodium carbonate solution with the concentration of 10% in a sodium carbonate dissolving tank, slowly adding the sodium carbonate solution into the pH adjusting tank, after uniformly stirring, heating the mother liquor to 61 ℃ by using a plate heat exchanger when the pH is 4.3, conveying the mother liquor and saccharifying enzyme into a saccharifying tank, wherein the flow ratio of the saccharifying enzyme to the mother liquor is 15.5:148000, the saccharifying time is 40h, the saccharifying time is 0-3h, the saccharifying time is 10-10.5h, the stirring is 20-20.5h, the stirring is 30-30.5h, the rotating speed is 40 r/min, and conveying the saccharified material into a decolorizing device;
the saccharifying enzyme is compound saccharifying enzyme, wherein the ratio of black yeast saccharifying enzyme to pullulanase debranching enzyme in the compound saccharifying enzyme is 100:3.
The saccharification system used in the saccharification process is the same as in example 1.
Example 3 saccharification Process for increasing glucose yield
The method comprises the following specific steps:
conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 28.4% by pure water, preparing sodium carbonate solution with the concentration of 10% in a sodium carbonate dissolving tank, slowly adding the sodium carbonate solution into the pH adjusting tank, after uniformly stirring, heating the mother liquor to 61.5 ℃ by using a plate heat exchanger at the pH of 4.5, conveying the mother liquor and saccharifying enzyme into a saccharifying tank together, wherein the flow ratio of the saccharifying enzyme to the mother liquor is 17.5:148000, the saccharifying time is 40h, the saccharifying time is 0-3h, the stirring is carried out at the time of 10-10.5h, the stirring is carried out at the time of 20-20.5h and the stirring is carried out at the time of 30-30.5h, and the rotating speed is 40 r/min, and conveying the saccharified material into a decolorizing device;
the saccharifying enzyme is compound saccharifying enzyme, wherein the ratio of black yeast saccharifying enzyme to pullulanase debranching enzyme in the compound saccharifying enzyme is 100:3.
The saccharification system used in the saccharification process is the same as in example 1.
Comparative example 1
The saccharifying enzyme used in comparative example 1 was black yeast saccharifying enzyme, the saccharifying time was 60 hours, and other parameters were the same as in example 1.
Test example 1 the mother liquor, enzyme addition amount, saccharification time, and mother liquor composition after saccharification in examples 1, 2, 3 and comparative example 1 of the present invention were measured, and the product yield change before and after saccharification and the product purity after saccharification were measured, and the measurement results are shown in table 1:
TABLE 1 statistical summary of glucose mother liquor saccharification experiments
Claims (7)
1. A saccharification process for improving glucose yield is characterized by comprising the following specific steps of: conveying glucose mother liquor into a pH adjusting tank, adjusting the concentration of the mother liquor to 28% -30% by pure water, preparing sodium carbonate solution with the concentration of 10% in a sodium carbonate dissolving tank, slowly adding the sodium carbonate solution into the pH adjusting tank, after uniformly stirring, heating the mother liquor to 60-62 ℃ by using a plate heat exchanger when the pH is 4.2-4.5, conveying the mother liquor and saccharifying enzyme into a saccharifying tank, wherein the flow ratio of the saccharifying enzyme to the mother liquor is 15-18:148000, the saccharifying time is 40h, the saccharifying time is 0-3h, stirring is carried out for 10-10.5h, 20-20.5h and 30-30.5h, and conveying the saccharified material into a decolorizing device at the rotating speed of 40 r/min; the saccharifying enzyme is compound saccharifying enzyme, and the ratio of black yeast saccharifying enzyme to pullulanase debranching enzyme in the compound saccharifying enzyme is 100:3.
2. The saccharification process of claim 1, wherein the concentration of the mother liquor is adjusted to 29.1% by pure water in a pH adjusting tank, a 10% sodium carbonate solution is prepared in a sodium carbonate dissolving tank, and the solution is slowly added into the pH adjusting tank and stirred uniformly to have a pH of 4.42.
3. The saccharification process of claim 1, wherein the flow ratio of saccharification enzyme to mother liquor is 16.6:148000.
4. The saccharification process of claim 1, wherein the process employs a saccharification system comprising a pure water tank, a sodium carbonate dissolution tank, a pH adjustment tank, a heat exchanger, a saccharification enzyme storage tank and a saccharification tank; the pure water tank and the sodium carbonate dissolving tank are respectively connected with the top of the pH adjusting tank through a high-pressure pump, the top of the pH adjusting tank is provided with an inlet of glucose mother liquor, the bottom of the pH adjusting tank is connected with a heat exchanger through the high-pressure pump, the heat exchanger is connected with the top of the saccharification tank through a pipeline A by a metering pump A, the saccharification enzyme storage tank is connected with the pipeline A by a metering pump B, the bottom of the saccharification tank is connected with a decoloring device through the high-pressure pump, a stirring device is arranged in the saccharification tank, and the stirring device in the saccharification tank is a straight leaf stirrer; the heat exchanger is a plate heat exchanger.
5. The saccharification process of claim 4, wherein the heat exchanger is 2 200m 2 Is a plate heat exchanger; the plate heat exchangers are connected in parallel.
6. The saccharification process of claim 4, wherein the saccharification tank is provided in a plurality of parallel connection.
7. The saccharification process of claim 6, wherein the saccharification tank is provided with 10.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534075A (en) * | 1992-07-07 | 1996-07-09 | Organo Corporation | Process for the production of glucose |
| CN103865968A (en) * | 2012-12-16 | 2014-06-18 | 西王药业有限公司 | Process for improving quality of anhydrous glucose and glucose monohydrate products |
| CN106701845A (en) * | 2016-11-28 | 2017-05-24 | 西王药业有限公司 | Method for producing sodium gluconate from corns as raw material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534075A (en) * | 1992-07-07 | 1996-07-09 | Organo Corporation | Process for the production of glucose |
| CN103865968A (en) * | 2012-12-16 | 2014-06-18 | 西王药业有限公司 | Process for improving quality of anhydrous glucose and glucose monohydrate products |
| CN106701845A (en) * | 2016-11-28 | 2017-05-24 | 西王药业有限公司 | Method for producing sodium gluconate from corns as raw material |
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