CN111187796A - Xanthan gum fermentation medium prepared by using resistant dextrin byproduct and system - Google Patents
Xanthan gum fermentation medium prepared by using resistant dextrin byproduct and system Download PDFInfo
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Abstract
The invention discloses a xanthan gum fermentation medium prepared by using a resistant dextrin byproduct and a system thereof, wherein the culture medium comprises the following components in percentage by mass: 2.5-6.6% of resistant dextrin by-product (calculated by dry matter), 0-3% of starch, 0.5-1.5% of bean flour, 0.02-0.15% of calcium carbonate, 0.02-0.05% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The system comprises a carbon source preparation system, a nitrogen source and auxiliary material liquid preparation system, a continuous digestion system and a fermentation tank. The method has the advantages that waste is changed into valuable, and the resistant dextrin by-product is used as the carbon source in the xanthan gum fermentation medium, so that the environmental protection problem of enterprises is solved, the environmental protection cost of the enterprises is reduced, and the problem that the production scale is limited due to the production of the resistant dextrin by-product is solved; the resistant dextrin byproduct is used as a low-valence carbon source in the xanthan gum fermentation medium, so that the production cost of the xanthan gum is reduced.
Description
The technical field is as follows:
the invention relates to the field of food fermentation, in particular to a xanthan gum fermentation medium prepared by using a resistant dextrin byproduct and a system.
Background art:
the resistant dextrin is white to light yellow powder, has slight sweet taste, no other peculiar smell and good water solubility, the 10 percent aqueous solution is transparent or light yellow, the pH value is 4.0-6.0, the viscosity of the aqueous solution of the resistant dextrin is very low, and the viscosity value changes slightly along with the change of the shearing rate and the temperature. The resistant dextrin has low calorie, heat resistance, acid resistance and freezing resistance, can be used as a low-calorie soluble food raw material, and has wide development prospect in the food industry.
In the production process of the resistant dextrin, about 2 tons of byproducts are produced when every 1 ton of the resistant dextrin is produced, and the byproducts mainly comprise glucose, maltose, micromolecule oligosaccharide and partial dietary fiber. Because the components of the by-product are complex, the price is low when the product is directly sold; if the industrial waste is treated, the treatment scale and difficulty are large, and the production cost is increased for enterprises; meanwhile, along with the continuous improvement of the requirement of industrial environmental protection and the continuous increase of the environmental protection supervision in recent years, the scale of the industrial waste treatment plant is limited and continuously reduced, the production requirement of enterprises cannot be met by relying on an external waste treatment plant to treat the resistant dextrin byproduct, the production can only be reduced in order to meet the environmental protection requirement, and the enterprise development is severely restricted.
The invention content is as follows:
the invention aims to provide a xanthan gum fermentation culture medium prepared by using a resistant dextrin byproduct, which can effectively treat the resistant dextrin byproduct, reduce the environmental protection load of enterprises and reduce the production cost of xanthan gum.
The second purpose of the invention is to provide a system for preparing xanthan gum fermentation culture medium by using resistant dextrin byproduct, which can effectively treat the resistant dextrin byproduct, reduce the environmental load of enterprises and reduce the production cost of xanthan gum.
The first purpose of the invention is implemented by the following technical scheme: the xanthan gum fermentation medium prepared by using the resistant dextrin byproduct comprises the following components in percentage by mass: 2.5-6.6% of resistant dextrin by-product (by dry matter concentration), 0-3% of starch, 0.5-1.5% of bean flour, 0.02-0.15% of calcium carbonate, 0.02-0.05% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%.
Further, the paint comprises the following components in percentage by mass: 4 percent of resistant dextrin by-product (calculated by dry matter concentration), 2 percent of starch, 1 percent of bean flour, 0.1 percent of calcium carbonate, 0.02 percent of antifoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100 percent.
Further, the defoaming agent is a polyether defoaming agent.
Further, the manufacturing steps are as follows:
s1, material preparation: weighing the following components in percentage by mass: 2.5-6.6% of resistant dextrin by-product (by dry matter concentration), 0-3% of starch, 0.5-1.5% of bean flour, 0.02-0.15% of calcium carbonate and 0.02-0.05% of defoaming agent;
s2, treatment of a resistant dextrin byproduct: diluting the resistance dextrin byproduct weighed in the ingredient in the S1. by using water until the dry matter concentration is 10-15%, and obtaining byproduct slurry;
s3, preparation of starch milk: and (2) mixing the starch weighed in the S1. ingredients with water according to the ratio of 0.7: mixing at a mass ratio of 9.3-1:9 to obtain starch milk;
s4, preparation of nitrogen source and auxiliary material liquid: s1, mixing the bean flour, calcium carbonate and defoaming agent weighed in the ingredients with water to prepare a nitrogen source and auxiliary material liquid, wherein the dry matter concentration of the nitrogen source and auxiliary material liquid is 8-10%; the water volume of the process water accounts for 71-80% of the total water volume;
s5, continuous disinfection: and sequentially pumping the byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a sterilized continuous digestion system for continuous high-temperature sterilization, conveying the sterilized and cooled byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a sterilized fermentation tank for mixing, pumping water into the continuous digestion system again for continuous high-temperature sterilization, and conveying the water subjected to continuous high-temperature sterilization into the fermentation tank until the sum of the mass percentages of the components is 100%, thereby obtaining the xanthan gum fermentation medium.
Further, S5, continuous high-temperature sterilization conditions of a continuous sterilization system in continuous sterilization are as follows: keeping the temperature at 130-140 deg.C and the pressure at 0.2-0.35MPa for 5-7 min.
The second purpose of the invention is implemented by the following technical scheme: utilize system of xanthan gum fermentation medium of resistant dextrin by-product preparation, it includes carbon source preparation system, nitrogen source and auxiliary material feed liquid preparation system, even system and fermentation cylinder of disappearing, the export of carbon source preparation system pass through the carbon source centrifugal pump with even the feed tank access connection of system of disappearing, the export of nitrogen source and auxiliary material feed liquid preparation system pass through the nitrogen source centrifugal pump with even the feed tank access connection of system of disappearing, even the export of system of disappearing with the fermentation cylinder is connected.
Further, the carbon source preparation system comprises a carbon source feeding tank, a carbon source preparation tank and a carbon source preheating heat exchanger, wherein an inlet of the carbon source feeding tank is connected with an outlet of the resistant dextrin byproduct storage tank, an inlet of the carbon source feeding tank is connected with an inlet of the carbon source preparation tank through a centrifugal pump and a mass flow meter, the carbon source preparation tank is connected with an external water source through the flow meter and an automatic control valve, an outlet of the carbon source preparation tank is connected with an inlet of the carbon source preheating heat exchanger, and an outlet of the carbon source preheating heat exchanger is connected with an inlet of a feeding tank of the continuous digestion system through the carbon source centrifugal pump.
Further, the nitrogen source and auxiliary material liquid preparation system comprises a nitrogen source and auxiliary material liquid feeding tank, a nitrogen source and auxiliary material liquid preparation tank, a nitrogen source and auxiliary material liquid preheating heat exchanger, wherein the nitrogen source and auxiliary material liquid feeding tank is connected with an inlet of the nitrogen source and auxiliary material liquid preparation tank through a centrifugal pump and a mass flow meter, the nitrogen source and auxiliary material liquid preparation tank is connected with an external water source through a flow meter and an automatic control valve, an outlet of the nitrogen source and auxiliary material liquid preparation tank is connected with an inlet of the nitrogen source and auxiliary material liquid preheating heat exchanger, and an outlet of the nitrogen source and auxiliary material liquid preheating heat exchanger is connected with an inlet of a feeding tank of the continuous digestion system through the nitrogen source centrifugal pump.
Furthermore, the carbon source preparation system also comprises a starch milk preparation system, the starch preparation system comprises a starch milk feeding tank, a starch milk preparation tank and a starch milk preheating heat exchanger, an outlet of the starch milk feeding tank is connected with an inlet of the starch milk preparation tank through a centrifugal pump and a mass flow meter, the starch milk preparation tank is connected with an external water source through a flow meter and a self-control valve, an outlet of the starch milk preparation tank is connected with an inlet of the starch milk preheating heat exchanger, and an outlet of the starch milk preheating heat exchanger is connected with an inlet of the carbon source centrifugal pump.
The invention has the advantages that: 1. the waste is changed into valuable, the resistant dextrin byproduct is used as a carbon source in the xanthan gum fermentation medium, the problem of enterprise byproduct treatment is solved, the environmental protection violation risk of enterprises is reduced, the problem that the production scale is limited due to the production of the resistant dextrin byproduct is solved, and the value of the resistant dextrin byproduct is improved. 2. The resistant dextrin byproduct is used as a low-valence carbon source in the xanthan gum fermentation medium, so that the production cost of the xanthan gum is reduced by 30-60%.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the entire structure of embodiment 1.
The continuous digestion system comprises a continuous digestion system 1, a fermentation tank 2, a carbon source centrifugal pump 3, a nitrogen source centrifugal pump 4, a carbon source feeding tank 5, a carbon source preparation tank 6, a carbon source preheating heat exchanger 7, a resistant dextrin byproduct storage tank 8, an external water source 9, a starch milk feeding tank 10, a starch milk preparation tank 11, a starch milk preheating heat exchanger 12, a nitrogen source and auxiliary material liquid feeding tank 13, a nitrogen source and auxiliary material liquid preparation tank 14 and a nitrogen source and auxiliary material liquid preheating heat exchanger 15.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1, the system for preparing xanthan gum fermentation medium by using resistant dextrin byproduct comprises a carbon source preparation system, a nitrogen source and auxiliary material liquid preparation system, a continuous digestion system 1 and a fermentation tank 2, wherein an outlet of the carbon source preparation system is connected with an inlet of a feeding tank of the continuous digestion system 1 through a carbon source centrifugal pump 3, an outlet of the nitrogen source and auxiliary material liquid preparation system is connected with an inlet of the feeding tank of the continuous digestion system 1 through a nitrogen source centrifugal pump 4, and an outlet of the continuous digestion system 1 is connected with the fermentation tank 2.
The carbon source preparation system comprises a carbon source feeding tank 5, a carbon source preparation tank 6 and a carbon source preheating heat exchanger 7, wherein an inlet of the carbon source feeding tank 5 is connected with an outlet of a resistant dextrin byproduct storage tank 8, an inlet of the carbon source feeding tank 5 is connected with an inlet of the carbon source preparation tank 6 through a centrifugal pump and a mass flow meter, the carbon source preparation tank 6 is connected with an external water source 9 through a flow meter and a self-control valve, an outlet of the carbon source preparation tank 6 is connected with an inlet of the carbon source preheating heat exchanger 7, and an outlet of the carbon source preheating heat exchanger 7 is connected with an inlet of a feeding tank of the continuous digestion system 1 through a carbon source. The carbon source preparation system also comprises a starch milk preparation system, the starch preparation system comprises a starch milk feeding tank 10, a starch milk preparation tank 11 and a starch milk preheating heat exchanger 12, an outlet of the starch milk feeding tank 10 is connected with an inlet of the starch milk preparation tank 11 through a centrifugal pump and a mass flow meter, the starch milk preparation tank 11 is connected with an external water source 9 through a flow meter and a self-control valve, an outlet of the starch milk preparation tank 11 is connected with an inlet of the starch milk preheating heat exchanger 12, and an outlet of the starch milk preheating heat exchanger 12 is connected with an inlet of the carbon source centrifugal pump 3.
The nitrogen source and auxiliary material liquid preparation system comprises a nitrogen source and auxiliary material liquid feeding tank 13, a nitrogen source and auxiliary material liquid preparation tank 14 and a nitrogen source and auxiliary material liquid preheating heat exchanger 15, wherein the nitrogen source and auxiliary material liquid feeding tank 13 is connected with an inlet of the nitrogen source and auxiliary material liquid preparation tank 14 through a centrifugal pump and a mass flow meter, the nitrogen source and auxiliary material liquid preparation tank 14 is connected with an external water source 9 through a flow meter and an automatic control valve, an outlet of the nitrogen source and auxiliary material liquid preparation tank 14 is connected with an inlet of the nitrogen source and auxiliary material liquid preheating heat exchanger 15, and an outlet of the nitrogen source and auxiliary material liquid preheating heat exchanger 15 is connected with an inlet of a feeding tank of the continuous digestion system 1 through a nitrogen.
Example 2:
a xanthan gum fermentation medium prepared using the resistant dextrin by-product of example 1, comprising the following components in mass percent: 2.5 percent of resistant dextrin by-product (calculated by dry matter concentration), 3 percent of starch, 0.5 percent of bean powder, 0.15 percent of calcium carbonate, 0.05 percent of defoaming agent and the balance of water, wherein the sum of the mass percent of the components is 100 percent. In this example, the defoamer was a polyether defoamer.
The preparation steps of the culture medium in this example are as follows:
s1, material preparation: weighing the following components in percentage by mass: 2.5 percent of resistant dextrin by-product (calculated by dry matter concentration), 3 percent of starch, 0.5 percent of bean powder, 0.15 percent of calcium carbonate and 0.05 percent of defoaming agent;
s2, treatment of a resistant dextrin byproduct: s1, diluting the weighed resistant dextrin byproduct in the ingredients with water until the dry matter concentration is 10% to obtain byproduct slurry;
s3, preparation of starch milk: and (3) mixing the starch weighed in the S1. ingredients with water according to the ratio of 0.7: 9.3 to obtain starch milk;
s4, preparation of nitrogen source and auxiliary material liquid: s1, mixing the bean flour, calcium carbonate and the defoaming agent which are weighed in the ingredients with water to prepare a nitrogen source and auxiliary material liquid, wherein the dry matter concentration of the nitrogen source and the auxiliary material liquid is 8%; the water volume of the process water accounts for 71 percent of the total water volume;
s5, continuous disinfection: and sequentially conveying the byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a continuous digestion system for high-temperature sterilization, conveying the sterilized byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a mixing tank for mixing, and supplementing water subjected to high-temperature sterilization by the continuous digestion system into the mixing tank until the sum of the mass percentages of the components is 100%, thereby obtaining the xanthan gum fermentation medium. The high-temperature sterilization conditions of the continuous sterilization system in the step are as follows: maintaining at 130 deg.C and 0.2MPa for 7 min.
This example compares to a conventional fermentation medium: 6% of starch, 0.5% of bean flour, 0.15% of calcium carbonate, 0.05% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. 120 tons of culture medium are prepared according to the components of the embodiment and the conventional fermentation culture medium respectively, the cost of the resistant dextrin byproduct is 1200 yuan/ton, the cost of starch is 2400 yuan/ton, the cost of bean flour is 5500 yuan/ton, the cost of the antifoaming agent is 18000 yuan/ton, the cost of calcium carbonate is 2000 yuan/ton, the cost of water is 5 yuan/ton, the cost of steam is 120 yuan/ton, the preparation costs of the two formulas are compared, and the comparison result is shown in table 1.
TABLE 1 comparison of formulation costs for two formulations
As can be seen from Table 1, the cost can be reduced by 18.9% by using the formula of the invention when 120 tons of fermentation medium are prepared, and meanwhile, the environmental protection problem possibly caused by improper treatment of the resistant dextrin byproduct is solved, and the limitation of the yield of the resistant dextrin byproduct on the production scale of the resistant dextrin is broken.
Example 3:
a xanthan gum fermentation medium prepared using the resistant dextrin by-product of example 1, comprising the following components in mass percent: 4 percent of resistant dextrin by-product (calculated by dry matter concentration), 2 percent of starch, 1 percent of bean flour, 0.1 percent of calcium carbonate, 0.03 percent of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100 percent. In this example, the defoamer was a polyether defoamer.
The preparation steps of the culture medium in this example are as follows:
s1, material preparation: weighing the following components in percentage by mass: 4 percent of resistant dextrin by-product (calculated by dry matter concentration), 2 percent of starch, 1 percent of bean flour, 0.1 percent of calcium carbonate and 0.03 percent of defoaming agent;
s2, treatment of a resistant dextrin byproduct: s1, diluting the weighed resistant dextrin byproduct in the ingredients with water until the dry matter concentration is 3% to obtain byproduct slurry;
s3, preparation of starch milk: and (2) mixing the starch weighed in the S1. ingredients with water according to the ratio of 0.8: 9.2 to obtain starch milk;
s4, preparation of nitrogen source and auxiliary material liquid: s1, mixing the bean flour, calcium carbonate and the defoaming agent which are weighed in the ingredients with water to prepare a nitrogen source and auxiliary material liquid, wherein the dry matter concentration of the nitrogen source and the auxiliary material liquid is 9%; the water volume of the process water accounts for 76 percent of the total water volume;
s5, continuous disinfection: and sequentially conveying the byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a continuous digestion system for high-temperature sterilization, conveying the sterilized byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a mixing tank for mixing, and supplementing water subjected to high-temperature sterilization by the continuous digestion system into the mixing tank until the sum of the mass percentages of the components is 100%, thereby obtaining the xanthan gum fermentation medium. The high-temperature sterilization conditions of the continuous sterilization system in the step are as follows: maintaining at 135 deg.C and 0.3MPa for 6 min.
This example compares to a conventional fermentation medium: 6% of starch, 1% of bean flour, 0.1% of calcium carbonate, 0.03% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. 120 tons of culture medium are prepared according to the components of the present example and the conventional fermentation culture medium respectively, the cost of the resistant dextrin by-product is 1200 yuan/ton, the cost of starch is 2400 yuan/ton, the cost of bean flour is 5500 yuan/ton, the cost of antifoaming agent is 18000 yuan/ton, the cost of calcium carbonate is 2000 yuan/ton, the cost of water is 5 yuan/ton, the cost of steam is 120 yuan/ton, the preparation costs of the two formulas are compared, and the comparison result is shown in Table 2.
Table 2 comparison of formulation costs for two formulations
As can be seen from Table 2, the cost can be reduced by 18.6% by using the formula of the present invention when 120 tons of fermentation medium are prepared, and meanwhile, the environmental protection problem possibly generated by improper treatment of the resistant dextrin by-product is solved, and the limitation of the yield of the resistant dextrin by-product on the production scale of the resistant dextrin is broken.
Example 4:
a xanthan gum fermentation medium prepared using the resistant dextrin by-product of example 1, comprising the following components in mass percent: 6.6 percent of resistant dextrin by-product (calculated by dry matter concentration), 0 percent of starch, 1.5 percent of bean powder, 0.02 percent of calcium carbonate, 0.02 percent of antifoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100 percent. In this example, the defoamer was a polyether defoamer.
The preparation steps of the culture medium in this example are as follows:
s1, material preparation: weighing the following components in percentage by mass: 6.6 percent of resistant dextrin by-product (calculated by dry matter concentration), 0 percent of starch, 1.5 percent of bean powder, 0.02 percent of calcium carbonate and 0.02 percent of defoaming agent;
s2, treatment of a resistant dextrin byproduct: s1, diluting the weighed resistant dextrin byproduct in the ingredients with water until the dry matter concentration is 15% to obtain byproduct slurry;
s3, preparation of starch milk: s1, mixing the weighed starch in the ingredients with water according to a mass ratio of 1:9 to obtain starch milk;
s4, preparation of nitrogen source and auxiliary material liquid: s1, mixing the bean flour, calcium carbonate and the defoaming agent which are weighed in the ingredients with water to prepare a nitrogen source and auxiliary material liquid, wherein the dry matter concentration of the nitrogen source and the auxiliary material liquid is 10%; the water volume of the process water accounts for 80 percent of the total water volume;
s5, continuous disinfection: and sequentially conveying the byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a continuous digestion system for high-temperature sterilization, conveying the sterilized byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a mixing tank for mixing, and supplementing water subjected to high-temperature sterilization by the continuous digestion system into the mixing tank until the sum of the mass percentages of the components is 100%, thereby obtaining the xanthan gum fermentation medium. The high-temperature sterilization conditions of the continuous sterilization system in the step are as follows: maintaining at 140 deg.C and 0.35MPa for 5 min.
This example compares to a conventional fermentation medium: 6% of starch, 1.5% of bean flour, 0.02% of calcium carbonate, 0.02% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. 120 tons of culture medium are prepared according to the components of the present example and the conventional fermentation culture medium respectively, the cost of the resistant dextrin by-product is 1200 yuan/ton, the cost of starch is 2400 yuan/ton, the cost of bean flour is 5500 yuan/ton, the cost of antifoaming agent is 18000 yuan/ton, the cost of calcium carbonate is 2000 yuan/ton, the cost of water is 5 yuan/ton, the cost of steam is 120 yuan/ton, the preparation costs of the two formulas are compared, and the comparison result is shown in Table 3.
TABLE 3 comparison of formulation costs for the two formulations
As can be seen from Table 3, the cost can be reduced by 40.1% by using the formulation of the present invention when 120 tons of fermentation medium are prepared, and at the same time, the environmental problem which may be caused by improper treatment of the resistant dextrin by-product is solved, and the limitation of the yield of the resistant dextrin by-product on the production scale of the resistant dextrin is broken.
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 invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The xanthan gum fermentation culture medium prepared by using the resistant dextrin byproduct is characterized by comprising the following components in percentage by mass: 2.5-6.6% of resistant dextrin by-product (by dry matter concentration), 0-3% of starch, 0.5-1.5% of bean flour, 0.02-0.15% of calcium carbonate, 0.02-0.05% of defoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100%.
2. The xanthan gum fermentation medium prepared with the resistant dextrin byproduct of claim 1, characterized in that it comprises the following components in mass percent: 4 percent of resistant dextrin by-product (calculated by dry matter concentration), 2 percent of starch, 1 percent of bean flour, 0.1 percent of calcium carbonate, 0.02 percent of antifoaming agent and the balance of water, wherein the sum of the mass percentages of the components is 100 percent.
3. The xanthan gum fermentation medium prepared with the use of the resistant dextrin by-product of any one of claims 1 or 2, wherein the antifoaming agent is a polyether type antifoaming agent.
4. The xanthan gum fermentation medium prepared with the resistant dextrin byproduct of claim 1, wherein the preparation steps are as follows:
s1, material preparation: weighing the following components in percentage by mass: 2.5-6.6% of resistant dextrin by-product (by dry matter concentration), 0-3% of starch, 0.5-1.5% of bean flour, 0.02-0.15% of calcium carbonate and 0.02-0.05% of defoaming agent;
s2, treatment of a resistant dextrin byproduct: diluting the resistance dextrin byproduct weighed in the ingredient in the S1. by using water until the dry matter concentration is 10-15%, and obtaining byproduct slurry;
s3, preparation of starch milk: and (2) mixing the starch weighed in the S1. ingredients with water according to the ratio of 0.7: mixing at a mass ratio of 9.3-1:9 to obtain starch milk;
s4, preparation of nitrogen source and auxiliary material liquid: s1, mixing the bean flour, calcium carbonate and defoaming agent weighed in the ingredients with water to prepare a nitrogen source and auxiliary material liquid, wherein the dry matter concentration of the nitrogen source and auxiliary material liquid is 8-10%; the water volume of the process water accounts for 71-80% of the total water volume;
s5, continuous disinfection: and sequentially pumping the byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a sterilized continuous digestion system for continuous high-temperature sterilization, conveying the sterilized and cooled byproduct slurry, the starch milk, the nitrogen source and the auxiliary material liquid into a sterilized fermentation tank for mixing, pumping water into the continuous digestion system again for continuous high-temperature sterilization, and conveying the water subjected to continuous high-temperature sterilization into the fermentation tank until the sum of the mass percentages of the components is 100%, thereby obtaining the xanthan gum fermentation medium.
5. The xanthan gum fermentation medium prepared with resistant dextrin by-products of claim 3, wherein S5. continuous high temperature sterilization conditions of continuous sterilization system in continuous sterilization are: keeping the temperature at 130-140 deg.C and the pressure at 0.2-0.35MPa for 5-7 min.
6. The system for preparing the xanthan gum fermentation medium by using the resistant dextrin byproducts is characterized by comprising a carbon source preparation system, a nitrogen source and auxiliary material liquid preparation system, a continuous digestion system and a fermentation tank, wherein an outlet of the carbon source preparation system is connected with a feed tank inlet of the continuous digestion system through a carbon source centrifugal pump, an outlet of the nitrogen source and auxiliary material liquid preparation system is connected with a feed tank inlet of the continuous digestion system through a nitrogen source centrifugal pump, and an outlet of the continuous digestion system is connected with the fermentation tank.
7. The system for preparing the xanthan gum fermentation medium by using the resistant dextrin byproduct as claimed in claim 6, wherein the carbon source preparation system comprises a carbon source feeding tank, a carbon source preparation tank and a carbon source preheating heat exchanger, an inlet of the carbon source feeding tank is connected with an outlet of the resistant dextrin byproduct storage tank, an inlet of the carbon source feeding tank is connected with an inlet of the carbon source preparation tank through a centrifugal pump and a mass flow meter, the carbon source preparation tank is connected with an external water source through a flow meter and a self-control valve, an outlet of the carbon source preparation tank is connected with an inlet of the carbon source preheating heat exchanger, and an outlet of the carbon source preheating heat exchanger is connected with an inlet of a feeding tank of the continuous sterilization system through the carbon source centrifugal pump.
8. The system of xanthan gum fermentation medium prepared by using resistant dextrin by-products according to any one of claims 6 or 7, wherein the nitrogen source and auxiliary material liquid preparation system comprises a nitrogen source and auxiliary material liquid feeding tank, a nitrogen source and auxiliary material liquid preparation tank, and a nitrogen source and auxiliary material liquid preheating heat exchanger, wherein the nitrogen source and auxiliary material liquid feeding tank is connected with an inlet of the nitrogen source and auxiliary material liquid preparation tank through a centrifugal pump and a mass flow meter, the nitrogen source and auxiliary material liquid preparation tank is connected with an external water source through a flow meter and an automatic control valve, an outlet of the nitrogen source and auxiliary material liquid preparation tank is connected with an inlet of the nitrogen source and auxiliary material liquid preheating heat exchanger, and an outlet of the nitrogen source and auxiliary material liquid preheating heat exchanger is connected with an inlet of a feeding tank of the continuous sterilization system through the nitrogen source centrifugal pump.
9. The system for preparing the xanthan gum fermentation medium by using the resistant dextrin byproduct according to any one of claims 6 or 7, wherein the carbon source preparation system further comprises a starch milk preparation system, the starch preparation system comprises a starch milk feeding tank, a starch milk preparation tank and a starch milk preheating heat exchanger, an outlet of the starch milk feeding tank is connected with an inlet of the starch milk preparation tank through a centrifugal pump and a mass flow meter, the starch milk preparation tank is connected with an external water source through the flow meter and a self-control valve, an outlet of the starch milk preparation tank is connected with an inlet of the starch milk preheating heat exchanger, and an outlet of the starch milk preheating heat exchanger is connected with an inlet of the carbon source centrifugal pump.
10. The system of claim 9, wherein the carbon source preparation system further comprises a starch milk preparation system, the starch preparation system comprises a starch milk feeding tank, a starch milk preparation tank and a starch milk preheating heat exchanger, an outlet of the starch milk feeding tank is connected with an inlet of the starch milk preparation tank through a centrifugal pump and a mass flow meter, the starch milk preparation tank is connected with an external water source through a flow meter and a self-control valve, an outlet of the starch milk preparation tank is connected with an inlet of the starch milk preheating heat exchanger, and an outlet of the starch milk preheating heat exchanger is connected with an inlet of the carbon source centrifugal pump.
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