CN215947326U - System for utilize maize starch coproduction erythritol and liquid sorbitol - Google Patents
System for utilize maize starch coproduction erythritol and liquid sorbitol Download PDFInfo
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- CN215947326U CN215947326U CN202121122124.9U CN202121122124U CN215947326U CN 215947326 U CN215947326 U CN 215947326U CN 202121122124 U CN202121122124 U CN 202121122124U CN 215947326 U CN215947326 U CN 215947326U
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Abstract
The utility model relates to a system for coproducing erythritol and liquid sorbitol by utilizing corn starch, which comprises a liquefaction tank, a saccharification tank, a filter and a nanofiltration component, wherein the liquefaction tank is used for liquefying the corn starch, the saccharification tank is used for saccharifying the liquefied material, the filter is used for filtering impurities in the saccharified material to obtain glucose liquid, the nanofiltration component is used for carrying out nanofiltration treatment on the filtered glucose liquid to respectively obtain dialysate and concentrated liquid, the system also comprises a fermentation crystallization component for fermenting and crystallizing the dialysate to prepare crystal erythritol, and a hydrogenation evaporation component for hydrogenating and evaporating the concentrated liquid to prepare the liquid sorbitol. The utility model not only improves the purity of the erythritol, but also obtains the liquid sorbitol, and improves the utilization value of the corn starch.
Description
Technical Field
The utility model belongs to the technical field of sugar alcohol preparation, and particularly relates to a system for co-producing erythritol and liquid sorbitol by using corn starch.
Background
Erythritol has been widely used in the food and beverage industries. At present, most of methods for industrially preparing erythritol take glucose as a raw material and prepare the erythritol through microbial fermentation, while the glucose usually takes starch as a raw material and is obtained through processes of liquefaction, saccharification, refining, concentration, crystallization and the like, and if the production processes of the glucose and the erythritol can be integrated, the method is more favorable for the utilization of resources and energy sources. Chinese patent publication No. CN102154383A describes a method for producing erythritol from corn flour, in which corn starch is directly used as a raw material, and after liquefaction and saccharification, fermentable glucose is obtained, wherein the preparation, enzymatic hydrolysis and fermentation culture are performed in the same fermentation tank, and the starch and glucose production process and device in the prior art are omitted. However, the glucose content in the glucose solution obtained after liquefaction and saccharification is about 96.0%, and the dry basis of glucose is reduced compared with that of crystalline glucose which is more than 99.0%, and on the other hand, other impurities in the glucose solution need to be removed in the subsequent erythritol purification process after fermentation, so that the difficulty of the purification process is increased, and the overall yield is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a system for coproducing erythritol and liquid sorbitol by utilizing corn starch, and starting from starch, preparing two products of erythritol and liquid sorbitol by carrying out nanofiltration treatment on glucose liquid obtained after liquefaction and saccharification.
The utility model is realized in such a way, and provides a system for coproducing erythritol and liquid sorbitol by using corn starch, which comprises a liquefaction tank, a saccharification tank, a filter and a nanofiltration component, wherein the liquefaction tank is used for liquefying the corn starch, the saccharification tank is used for saccharifying the liquefied material, the filter is used for filtering impurities in the saccharified material to obtain glucose liquid, the nanofiltration component is used for carrying out nanofiltration treatment on the filtered glucose liquid to respectively obtain dialysate and concentrated liquid, the system also comprises a fermentation crystallization component for fermenting and crystallizing the dialysate to prepare crystal erythritol, and a hydrogenation evaporation component for hydrogenating and evaporating the concentrated liquid to prepare the liquid sorbitol; the saccharification tank is respectively communicated with the liquefaction tank and the filter, the feed end of the nanofiltration component is communicated with the filter, the discharge end of the dialysate is communicated with the feed end of the fermentation crystallization component, and the discharge end of the concentrated solution is communicated with the feed end of the hydrogenation evaporation component.
Furthermore, the nanofiltration assembly comprises a buffer tank, a feed pump, a pre-nanofiltration filter, a high-pressure pump and a nanofiltration membrane assembly consisting of a nanofiltration membrane and a circulating pump which are sequentially communicated through pipelines, and the glucose solution filtered by the pre-nanofiltration filter is subjected to nanofiltration treatment by the nanofiltration membrane assembly to obtain dialysate and concentrated solution respectively.
Further, the fermentation and crystallization assembly comprises a fermentation tank, a membrane filter, a crystallization assembly and a recrystallization assembly, wherein the fermentation tank is used for converting glucose components in the dialysate into erythritol after fermentation treatment, the membrane filter is used for removing impurities in the material after fermentation treatment, and the crystallization assembly and the recrystallization assembly are used for crystallizing the material after filtration treatment by the membrane filter to obtain crystalline erythritol.
Further, the hydrogenation evaporation assembly comprises a hydrogenation tank, an ion exchanger and an evaporation tank, wherein the hydrogenation tank is used for converting glucose components in the concentrated solution into sorbitol after hydrogenation treatment, and the ion exchanger and the evaporation tank are used for purifying the material subjected to hydrogenation treatment in the hydrogenation tank to obtain liquid sorbitol.
Compared with the prior art, the system for coproducing erythritol and liquid sorbitol by using corn starch uses corn starch as a raw material, obtains glucose liquid after liquefaction and saccharification, obtains the dialysate with the glucose content of more than 99% after nanofiltration, is used for preparing erythritol through fermentation treatment, can improve the dry basis concentration of erythritol in a fermentation liquid compared with the condition that the glucose liquid with the glucose content of 96% is directly used, can improve the fermentation yield, and is also beneficial to subsequent purification of the fermentation liquid. And the nanofiltration concentrated solution obtained after nanofiltration is hydrogenated and ion-exchanged to obtain the liquid sorbitol with the sorbitol purity more than 80 percent. The utility model not only improves the purity of the erythritol, but also obtains the additional product of the liquid sorbitol, and improves the utilization value of the corn starch.
Drawings
FIG. 1 is a schematic diagram of the system for co-producing erythritol and liquid sorbitol using corn starch according to the present invention;
FIG. 2 is a schematic diagram illustrating the principle of the method for co-producing erythritol and liquid sorbitol by using corn starch according to the present invention;
fig. 3 is a schematic diagram of the nanofiltration module and nanofiltration process shown in fig. 1.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and 2, a preferred embodiment of the system for co-producing erythritol and liquid sorbitol from corn starch according to the present invention is shown, in which the lines with arrows indicate the flowing direction of the materials in the present invention. The system comprises a liquefaction tank 1, a saccharification tank 2, a filter 3 and a nanofiltration assembly 4.
The liquefaction tank 1 is used for liquefying corn starch A, the saccharification tank 2 is used for saccharifying the liquefied material, the filter 3 is used for filtering impurities in the saccharified material to obtain glucose liquid B, and the nanofiltration component 4 is used for carrying out nanofiltration treatment on the filtered glucose liquid to respectively obtain dialysate C and concentrated solution D.
The dialysate C contains water and most of small molecular substances such as glucose. The concentrated solution D contains small amount of macromolecular substances such as glucose, oligosaccharide and other heterosaccharides.
The system also comprises a fermentation and crystallization component I for fermenting and crystallizing the dialysate C to prepare crystal erythritol E, and a hydrogenation and evaporation component II for hydrogenating and evaporating the concentrated solution D to prepare liquid sorbitol F. The saccharification tank 2 is respectively communicated with the liquefaction tank 1 and the filter 3, the feed end of the nanofiltration component 4 is communicated with the filter 3, the discharge end of the dialysate is communicated with the feed end of the fermentation crystallization component I, and the discharge end of the concentrated solution is communicated with the feed end of the hydrogenation evaporation component II.
Referring to fig. 1 and fig. 3, the nanofiltration module 4 includes a buffer tank 41, a feed pump 42, a pre-nanofiltration filter 43, a high pressure pump 44, and a nanofiltration membrane module 47 composed of a nanofiltration membrane 45 and a circulation pump 46, which are sequentially connected by a pipeline, and the glucose solution B filtered by the pre-nanofiltration filter 43 is subjected to nanofiltration treatment by the nanofiltration membrane module 47 to obtain a dialysate C and a concentrate D, respectively. Water in the glucose solution B and most of micromolecular components such as glucose penetrate through the surface of the nanofiltration membrane under the action of pressure to form dialysate C. Macromolecular components such as oligosaccharide in the glucose solution B are intercepted by the nanofiltration membrane and cannot penetrate through the surface of the nanofiltration membrane to form a concentrated solution D.
The nanofiltration assembly 4 comprises a washing tank 48 and a washing pump 49. The cleaning tank 48 and the cleaning pump 49 are used to periodically clean the nanofiltration membrane 45. And obtaining cleaning wastewater G after cleaning.
The fermentation and crystallization component I comprises a fermentation tank 5, a membrane filter 6, a crystallization component 7 and a recrystallization component 8. The fermentation tank 5 is used for converting glucose components in the dialysate C into erythritol after fermentation treatment. The membrane filter 6 is used for removing impurities in the fermented material. The crystallizing component 7 and the recrystallizing component 8 are used for crystallizing the material filtered by the membrane filter 6 to obtain crystalline erythritol E.
The hydrogenation and evaporation assembly II comprises a hydrogenation tank 9, an ion exchanger 10 and an evaporation tank 11. The hydrogenation tank 9 is used for converting oligosaccharide components in the concentrated solution D into sorbitol after hydrogenation treatment, and the ion exchanger 10 and the evaporation tank 11 are used for purifying the material hydrogenated in the hydrogenation tank 9 to obtain liquid sorbitol F.
The utility model also discloses a method for coproducing erythritol and liquid sorbitol by using corn starch, which uses the system for coproducing erythritol and liquid sorbitol by using corn starch, and the method comprises the following steps:
step one, carrying out liquefaction, saccharification and filtration treatment on corn starch A to obtain glucose liquid B with the concentration of a solid matter of 33-35%, wherein the purity of glucose in the solid matter is 95.0-96.3%. Wherein, the liquefaction, saccharification and filtration treatment belong to the existing mature treatment process and are not described again.
And step two, performing nanofiltration treatment on the obtained glucose solution B to respectively obtain a dialysate C and a concentrated solution D, wherein the purity of glucose in the dialysate C is 99.0-99.5%, and the purity of glucose in the concentrated solution D is 80.0-86.0%.
And step three, subjecting the obtained dialysate C to processes such as fermentation, membrane filtration, crystallization and recrystallization to obtain crystal erythritol E with the erythritol purity higher than 99.5%, and subjecting the obtained concentrated solution D to processes such as hydrogenation, ion exchange and evaporation to obtain liquid sorbitol F with the sorbitol purity higher than 80%. Wherein, the processes of fermentation, membrane filtration, crystallization, recrystallization and the like belong to the existing mature treatment process, and the processes of hydrogenation, ion exchange, evaporation and the like also belong to the existing mature treatment process, and are not described again.
Specifically, in the first step, the temperature of the glucose solution B is 50-60 ℃, and the pH value is 4.0-5.0.
Specifically, in the second step, the nanofiltration treatment includes that the obtained glucose solution B enters a buffer tank 41, passes through a pre-nanofiltration filter 43 through a feed pump 42, and enters a nanofiltration assembly 47 composed of a nanofiltration membrane 45 and a circulation pump 46 through a high-pressure pump 44 for nanofiltration, and a dialysate C that permeates through the nanofiltration membrane 45 and a concentrated solution D that does not permeate through the nanofiltration membrane 45 are obtained after the nanofiltration treatment.
The nanofiltration process further comprises periodically washing the nanofiltration membrane 45 by a washing pump 49 using washing water in a washing tank 48. And obtaining cleaning wastewater G after cleaning.
During nanofiltration treatment, the operating temperature of the nanofiltration component is 40-60 ℃, and the operating pressure is 15-35 bar.
Specifically, in the third step, the dialysis solution is subjected to heat exchange and evaporation to 35% of dry matter concentration before fermentation treatment.
The process for the co-production of erythritol and liquid sorbitol using corn starch according to the utility model is further illustrated by the following specific examples.
Example 1
The first embodiment of the method for coproducing erythritol and liquid sorbitol by using corn starch adopts a method that 96% glucose solution is subjected to nanofiltration and then is fermented to prepare erythritol, and liquid sorbitol is prepared by hydrogenation.
The method for co-producing erythritol and liquid sorbitol by using corn starch comprises the following steps: carrying out nanofiltration treatment on 1 ton of dry basis of 96.0% glucose solution B prepared by liquefying, saccharifying and filtering corn starch A to respectively obtain 0.8 ton of dry basis of dialysate C with the glucose purity of 99.0% and 0.2 ton of dry basis of concentrate D with the glucose purity of 85.5%, and finally obtaining 0.43 ton of crystal erythritol E after carrying out fermentation, membrane filtration, crystallization, recrystallization and other processes on the dialysate C, wherein the conversion rate from glucose to erythritol is 53.75%; in addition, the concentrated solution D was subjected to hydrogenation, ion exchange, evaporation and the like to obtain 0.2 ton of a liquid sorbitol F dry basis.
Comparative example
The method adopts 96% glucose solution directly used for preparing erythritol through fermentation, and comprises the following specific steps: 0.8 ton of glucose solution dry basis with the purity of 96 percent is directly subjected to the processes of fermentation, membrane filtration, crystallization, recrystallization and the like to obtain 0.42 ton of crystal erythritol. The conversion of glucose to erythritol was 52.50%.
As can be seen from the comparison of example 1 with the comparative example, the conversion of erythritol produced by direct fermentation of a glucose solution having a purity of 96% is not as high as that of erythritol produced by using a dialysate obtained by subjecting the glucose solution to nanofiltration in the same amount of glucose on a dry basis, because the purity of glucose in the dialysate is higher than 99% than that of the glucose solution before dialysis.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A system for co-producing erythritol and liquid sorbitol by using corn starch is characterized by comprising a liquefaction tank, a saccharification tank, a filter and a nanofiltration assembly, wherein the liquefaction tank is used for liquefying the corn starch, the saccharification tank is used for saccharifying the liquefied material, the filter is used for filtering impurities in the saccharified material to obtain glucose liquid, the nanofiltration assembly is used for carrying out nanofiltration treatment on the filtered glucose liquid to respectively obtain dialysate and concentrated liquid, the system further comprises a fermentation crystallization assembly used for fermenting and crystallizing the dialysate to prepare crystal erythritol, and a hydrogenation evaporation assembly used for hydrogenating and evaporating the concentrated liquid to prepare the liquid sorbitol; the saccharification tank is respectively communicated with the liquefaction tank and the filter, the feed end of the nanofiltration component is communicated with the filter, the discharge end of the dialysate is communicated with the feed end of the fermentation crystallization component, and the discharge end of the concentrated solution is communicated with the feed end of the hydrogenation evaporation component.
2. The system for co-producing erythritol and liquid sorbitol by using corn starch as claimed in claim 1, wherein the nanofiltration module comprises a buffer tank, a feed pump, a pre-nanofiltration filter, a high pressure pump and a nanofiltration membrane module consisting of a nanofiltration membrane and a circulating pump which are sequentially communicated through a pipeline, and the glucose solution filtered by the pre-nanofiltration filter is subjected to nanofiltration treatment by the nanofiltration membrane module to obtain a dialysate and a concentrated solution respectively.
3. The system for co-producing erythritol and liquid sorbitol by using corn starch as claimed in claim 2, wherein the fermentation and crystallization module comprises a fermentation tank, a membrane filter, a crystallization module and a recrystallization module, the fermentation tank is used for converting glucose components in the dialysate into erythritol after fermentation treatment, the membrane filter is used for removing impurities in the material after fermentation treatment, and the crystallization module and the recrystallization module are used for performing crystallization treatment on the material after filtration treatment by the membrane filter to obtain crystalline erythritol.
4. The system for co-producing erythritol and liquid sorbitol by using corn starch as claimed in claim 3, wherein the hydrogenation evaporation assembly comprises a hydrogenation tank, an ion exchanger and an evaporation tank, the hydrogenation tank is used for converting glucose components in the concentrated solution into sorbitol after hydrogenation treatment, and the ion exchanger and the evaporation tank are used for purifying the material hydrogenated in the hydrogenation tank to obtain liquid sorbitol.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512566A (en) * | 2021-05-25 | 2021-10-19 | 浙江华康药业股份有限公司 | System and method for co-producing erythritol and liquid sorbitol by using corn starch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512566A (en) * | 2021-05-25 | 2021-10-19 | 浙江华康药业股份有限公司 | System and method for co-producing erythritol and liquid sorbitol by using corn starch |
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