CN1844155A - Method for preparing a welan gum - Google Patents
Method for preparing a welan gum Download PDFInfo
- Publication number
- CN1844155A CN1844155A CN 200610012511 CN200610012511A CN1844155A CN 1844155 A CN1844155 A CN 1844155A CN 200610012511 CN200610012511 CN 200610012511 CN 200610012511 A CN200610012511 A CN 200610012511A CN 1844155 A CN1844155 A CN 1844155A
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- China
- Prior art keywords
- welan gum
- fermentation
- preparation
- substratum
- enlarged culturing
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Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229920002310 Welan gum Polymers 0.000 title claims description 43
- 238000000855 fermentation Methods 0.000 claims abstract description 42
- 230000004151 fermentation Effects 0.000 claims abstract description 42
- 238000002360 preparation method Methods 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 241000736131 Sphingomonas Species 0.000 claims abstract description 5
- 238000012258 culturing Methods 0.000 claims description 37
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000002609 medium Substances 0.000 claims description 16
- 229930006000 Sucrose Natural products 0.000 claims description 14
- 230000001580 bacterial effect Effects 0.000 claims description 14
- 239000005720 sucrose Substances 0.000 claims description 14
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 13
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- 239000002054 inoculum Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 12
- 229940041514 candida albicans extract Drugs 0.000 claims description 11
- 239000013530 defoamer Substances 0.000 claims description 11
- 239000012138 yeast extract Substances 0.000 claims description 11
- 239000001888 Peptone Substances 0.000 claims description 10
- 108010080698 Peptones Proteins 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 10
- 239000000499 gel Substances 0.000 claims description 10
- 235000019319 peptone Nutrition 0.000 claims description 10
- 235000019698 starch Nutrition 0.000 claims description 10
- 239000008107 starch Substances 0.000 claims description 10
- 239000007795 chemical reaction product Substances 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 8
- 238000002203 pretreatment Methods 0.000 claims description 8
- 235000013619 trace mineral Nutrition 0.000 claims description 8
- 239000011573 trace mineral Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 238000010564 aerobic fermentation Methods 0.000 claims description 5
- 239000001963 growth medium Substances 0.000 claims description 5
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 4
- 229920001817 Agar Polymers 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 239000008272 agar Substances 0.000 claims description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 4
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 235000014633 carbohydrates Nutrition 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000011081 inoculation Methods 0.000 claims description 4
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 150000001720 carbohydrates Chemical class 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- 125000000185 sucrose group Chemical group 0.000 claims description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 4
- 239000004568 cement Substances 0.000 description 3
- -1 L-rhamnosyl Chemical group 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 1
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- IAJILQKETJEXLJ-QTBDOELSSA-N aldehydo-D-glucuronic acid Chemical compound O=C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)C(O)=O IAJILQKETJEXLJ-QTBDOELSSA-N 0.000 description 1
- WQZGKKKJIJFFOK-PQMKYFCFSA-N alpha-D-mannose Chemical compound OC[C@H]1O[C@H](O)[C@@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-PQMKYFCFSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940097043 glucuronic acid Drugs 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
This invention belonging to fermentation microbiology and extraction is a preparation method of mild-wheel gel. We use Sphingomonas sp CGMCC1561 as engineering strain, ferment under the conditions of 25-36deg C and PH 6.2-6.7, and extract mild-wheel gel from fermentation product. This invention overcomes many difficulities in previous methods, such as low adhesiveness (lower than 100cp), PH condition change in fermentation, high cost on medium, low durability of highly-densed calcium ion and so on.
Description
Technical field
The invention belongs to microbial fermentation and extraction, specifically a kind of preparation method of welan gum.
Background technology
Welan gum (WELAN GUM) is a kind of technical grade microbial polysaccharide, and it contains the acetyl ester group that neutral sugar, D-glucose, D=glucuronic acid, L-rhamnosyl and L=seminose and glycosidic linkage close.JanssonPE, Lindberg B and Widmalm G (1985) " carbohydrate compound research " (139, the structure of this polysaccharide has been described in 217-223), have only the U.S. to realize suitability for industrialized production at present.
Disclose a kind of low viscous Welan gum in the U.S. Pat 4963668, its viscosity in aqueous solution of 5% is 100cp only, can be used in the cement products.
The patent No. is to have related to the method for preparing fast hydration Welan gum (WELANGUM) in 92102564.5 the patent of invention, this method is to ferment with the S-130 bacterial strain, make the aerobic fermentation of S-130 bacterial strain at the about 6.5-7.5 of pH value, need to adjust the pH value in the fermenting process to 10.5-12.5, adopt subsequently usual manner precipitate, dry, grind.Adopt the Welan gum of this method preparation to have good hydration characteristics and heatproof characteristic (Fahrenheit 300 degree are with interior unchangeability), but the data declaration of relevant its viscosity adopts the Welan gum viscosity very low (being lower than 100cp) of this method preparation, and need to change fermentation condition (pH) in the fermenting process, its processing step complexity, the culture medium cost height, the data record and the explanatory note that do not have the capability of doing sth and be subjected to high concentration calcium ion.
Summary of the invention
The object of the present invention is to provide a kind of by making cultivating Sphingol single-cell (Sphingomonas sp) CGMCC1561 in as carbon source, with substratum such as yeast extract paste, bean cake powders as nitrogenous source with carbohydrate, and adopt gel, abstraction technique from the fermentation end product, to extract the method for welan gum, prepared welan gum is had under the prerequisite of good heat resistance, possess viscosity and rheological preferably simultaneously, ability is liked the calcium ion of high density.
Overall technical architecture of the present invention is:
The preparation method of welan gum, comprise fermentation step, be that production bacterial classification inoculation with welan gum ferments in the aseptic culture medium that contains carbon source, nitrogenous source, inorganic salt and water, described fermenting process is to be that 25-36 ℃, pH are to carry out aerobic fermentation under the condition of 6.2-6.7 in temperature, produce bacterial classification and select Sphingol single-cell (Sphingomonas sp) CGMCC1561 for use, the fermentation end product is extracted obtain welan gum.
The actual conditions of each processing step is among the present invention:
Carbon source is selected from sucrose, starch or the hydrolysis sugar in the carbohydrate.
Nitrogenous source is selected from one or more in yeast extract paste, peptone, bean powder, bean cake powder, the inorganic ammonium salt.
Fermenting process comprises following process steps:
A, with original strain bevel bacterial classification;
B, the slant strains for preparing in the A step is made seed liquor through enlarged culturing;
C, with the seed liquor for preparing in the B step by seed liquor: fermention medium is that the inoculum size of 8%-10% inserts fermention medium and inserts fermention medium and ferment, and wherein fermention medium comprises following component (g/L):
Starch (hydrolysis sugar) 3.5-4 bean cake powder 0.25-0.3 ammonium nitrate 0.15-0.2
Sal epsom 0.01-0.15 dipotassium hydrogen phosphate 0.1-0.15 lime carbonate 0.1-0.15
Trace element 0.001-0.0015
Culture temperature is that 25-36 ℃, pH6.2-6.7, ventilation are that 0.15-1vvm, fermentation period are 48-96 hour in the fermentation.
Substratum in the described A step in the preparation process of slant strains comprises following component (g/L):
Sucrose 1-1.2 yeast extract paste 0.25-0.3 extractum carnis 0.25-0.3
Peptone 0.1-0.15 agar 2-2.2 defoamer 0.07-0.1
The pH of substratum is 6.2-6.7.
Enlarged culturing in the described B step comprises one-level enlarged culturing and secondary enlarged culturing, slant strains is inserted the substratum of one-level enlarged culturing and makes first order seed through fermentation, and wherein substratum comprises following component (g/L) in the one-level enlarged culturing:
Sucrose 1-1.2 yeast extract paste 0.25-0.3 extractum carnis 0.25-0.3
Peptone 0.1-0.15 defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 1-2%, culture temperature are that 25-36 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 24-27 hour.
Described secondary enlarged culturing is that the substratum that first order seed inserts the secondary enlarged culturing is made secondary seed through fermentation, and the substratum in the secondary enlarged culturing comprises following component (g/L):
Sucrose 0.85-1 starch 0.2-0.25 ammonium sulfate 0.15-0.2 bean powder 0.15-0.2
Dipotassium hydrogen phosphate 0.1-0.15 potassium primary phosphate 0.04-0.05 sal epsom 0.01-0.15
Defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 8-10%, culture temperature are that 25-36 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 20-24 hour.
The composition of the trace element described in the described step C is (g/L):
Citric acid 0.1 Ca (OH)
20.005 CuSO
45H
2O 2.5 * 10
-5
CoSO
4?2.8×10
-5 MgSO
4?0.0086 FeSO
4?1.8×10
-3
ZnSO
4?2.8×10
-5 H
3BO
4?6×10
-6 MnSO
4?8.3×10
-5
The fermentation end product extracted obtains welan gum and comprise following processing step:
(1) pre-treatment for the first time: the fermented liquid stirring is warming up to 60-80 ℃ of insulation, is reduced to room temperature;
(2) pre-treatment for the second time: will react after 30-45 minute through adding the Gel Treatment agent in the pretreated fermented liquid for the first time, adjustment pH to 3.5-4.5 reacts and was the microgel shape to fermented liquid in 30-45 minute;
(3) extraction: add extraction agent, make welan gum be fibrous and separate out;
(4) filtration, wash-out pigment and impurity, drying, pulverizing, screening.
Soaking time described in the step (1) is 1 hour; Calcium chloride is selected in Gel Treatment agent described in the step (2) for use, adjusts the pH value and selects hydrochloric acid for use; Extraction agent in the step (3) is selected ethanol for use; The ethanol that wash-out pigment in the step (4) and impurity are selected 85%-90% for use filters and selects whizzer or extrusion machine for use, and drying is selected vacuum-drying for use.
Substantive distinguishing features that the present invention is obtained and significant technical progress are:
1, utilize the welan gum of method preparation of the present invention to have good heat resistance, unattenuated in 300 Fahrenheit degrees (248.9 degrees centigrade) viscosity, its aqueous solution has excellent viscosity and splendid rheological property (its solution viscosity of 1% is 1800cp), can tolerate the calcium ion of high density, being used for cement industry has as cement additive, increase the denseness and the rheological characteristics of ore in sand form, improve the stability of concrete self-compacting, increase the concrete resistance to compression bleeding of mud.Can be used for the petroleum drilling and mining industry,, can be used for industries such as fine chemistry industry, daily use chemicals for oil mud provides thickening, suspension and rheological characteristics.
2, integrated artistic route of the present invention is provided with rationally, prepares welan gum through slant strains, I and II enlarged culturing, ferment tank, gel extraction step, than prior art, and easier realization industrialized mass production.Processing condition need not carried out centre adjustment in the fermenting process, easily are automated control.
3, the component wide material sources of substratum among the present invention are with low cost, and industrial production cost is reduced significantly.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1:
The preparation method of welan gum, comprise fermentation step, be that production bacterial classification inoculation with welan gum ferments in the aseptic culture medium that contains carbon source, nitrogenous source, inorganic salt and water, fermenting process is to be that 29 ℃, pH are to carry out aerobic fermentation under the condition of 6.2-6.7 in temperature, the production bacterial classification of this method is selected Sphingol single-cell (Sphingomonas sp) CGMCC1561 for use, the fermentation end product is extracted obtain welan gum.
Fermenting process comprises following process steps:
A, with original strain bevel bacterial classification;
B, the slant strains for preparing in the A step is made seed liquor through enlarged culturing;
C, with the seed liquor for preparing in the B step by seed liquor: fermention medium is that 8% inoculum size inserts fermention medium and inserts fermention medium and ferment, and wherein fermention medium comprises following component (g/L):
Starch (hydrolysis sugar) 3.6 bean cake powders 0.26 ammonium nitrate 0.18
Sal epsom 0.09 dipotassium hydrogen phosphate 0.11 lime carbonate 0.11
Trace element 0.001-0.0015
Culture temperature is that 29 ℃, pH6.2-6.7, ventilation are that 0.15-1vvm, fermentation period are 72 hours in the fermentation.
Substratum in the described A step in the preparation process of slant strains comprises following component (g/L):
Sucrose 1-1.2 yeast extract paste 0.25-0.3 extractum carnis 0.25-0.3
Peptone 0.1-0.15 agar 2-2.2 defoamer 0.07-0.1
The pH of substratum is 6.2-6.7.
Enlarged culturing comprises one-level enlarged culturing and secondary enlarged culturing, slant strains is inserted the substratum of one-level enlarged culturing and makes first order seed through fermentation, and wherein substratum comprises following component (g/L) in the one-level enlarged culturing:
Sucrose 1.1 yeast extract pastes 0.28 extractum carnis 0.27
Peptone 0.13 defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 1-2%, culture temperature are that 29 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 26 hours.
The secondary enlarged culturing is that the substratum that first order seed inserts the secondary enlarged culturing is made secondary seed through fermentation, and the substratum in the secondary enlarged culturing comprises following component (g/L):
Sucrose 0.85-1 starch 0.2-0.25 ammonium sulfate 0.15-0.2 bean powder 0.15-0.2
Dipotassium hydrogen phosphate 0.1-0.15 potassium primary phosphate 0.04-0.05 sal epsom 0.01-0.15
Defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 8-10%, culture temperature are that 25-36 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 20-24 hour.
The composition of the trace element described in the step C is (g/L):
Citric acid 0.1 Ca (OH)
20.005 CuSO
45H
2O 2.5 * 10
-5
CoSO
4?2.8×10
-5 MgSO
4?0.0086 FeSO
4?1.8×10
-3
ZnSO
4?2.8×10
-5 H
3BO
4?6×10
-6 MnSO
4?8.3×10
-5
The fermentation end product extracted obtains welan gum and comprise following processing step:
(1) pre-treatment for the first time: the fermented liquid stirring is warming up to 65 ℃ of insulations, is reduced to room temperature;
(2) pre-treatment for the second time: will react after 40 minutes through adding the Gel Treatment agent in the pretreated fermented liquid for the first time, adjustment pH to 3.8 reacts and was the microgel shape to fermented liquid in 40 minutes;
(3) extraction: add extraction agent, make welan gum be fibrous and separate out;
(4) filtration, wash-out pigment and impurity, drying, pulverizing, screening.
Soaking time described in the step (1) is 1 hour; Calcium chloride is selected in Gel Treatment agent described in the step (2) for use, adjusts the pH value and selects hydrochloric acid for use; Extraction agent in the step (3) is selected ethanol for use; The ethanol that wash-out pigment in the step (4) and impurity are selected 85%-90% for use filters and selects whizzer for use, and drying is selected vacuum-drying for use.
Embodiment 2
The preparation method of welan gum, comprise fermentation step, be that production bacterial classification inoculation with welan gum ferments in the aseptic culture medium that contains carbon source, nitrogenous source, inorganic salt and water, fermenting process is to carry out aerobic fermentation under the condition of 33 ℃ of temperature, pH6.5, produce bacterial classification and select Sphingol single-cell (Sphingomonassp) CGMCC1561 for use, the fermentation end product is extracted obtain welan gum.
Fermenting process comprises following process steps:
A, with original strain bevel bacterial classification;
B, the slant strains for preparing in the A step is made seed liquor through enlarged culturing;
C, with the seed liquor for preparing in the B step by seed liquor: fermention medium is that 9% inoculum size inserts fermention medium and inserts fermention medium and ferment, and wherein fermention medium comprises following component (g/L):
Starch (hydrolysis sugar) 3.8 bean cake powders 0.28 ammonium nitrate 0.17
Sal epsom 0.09 dipotassium hydrogen phosphate 0.11 lime carbonate 0.11
Trace element 0.001-0.0015
Culture temperature is that 33 ℃, pH6.5, ventilation are that 0.8vvm, fermentation period are 65 hours in the fermentation.
Substratum in the described A step in the preparation process of slant strains comprises following component (g/L):
Sucrose 1.2 yeast extract pastes 0.26 extractum carnis 0.26
Peptone 0.12 agar 2.2 defoamers 0.09
The pH of substratum is 6.6.
Enlarged culturing comprises one-level enlarged culturing and secondary enlarged culturing, slant strains is inserted the substratum of one-level enlarged culturing and makes first order seed through fermentation, and wherein substratum comprises following component (g/L) in the one-level enlarged culturing:
Sucrose 1.1 yeast extract pastes 0.28 extractum carnis 0.27
Peptone 0.13 defoamer 0.08
The pH of substratum is 6.6, inoculum size is 1.5%, culture temperature is that 33 ℃, ventilation are that 0.16vvm, fermentation period are 25 hours.
The secondary enlarged culturing is that the substratum that first order seed inserts the secondary enlarged culturing is made secondary seed through fermentation, and the substratum in the secondary enlarged culturing comprises following component (g/L):
Sucrose 0.9 starch 0.22 ammonium sulfate 0.17 bean powder 0.18
Dipotassium hydrogen phosphate 0.14 potassium primary phosphate 0.04 sal epsom 0.1
Defoamer 0.09
The pH of substratum is 6.6, inoculum size is 9%, culture temperature is that 33 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 22 hours.
The composition of the trace element described in the step C is (g/L):
Citric acid 0.1 Ca (OH)
20.005 CuSO
45H
2O 2.5 * 10
-5
CoSO
4?2.8×10
-5 MgSO
4?0.0086 FeSO
4?1.8×10
-3
ZnSO
4?2.8×10
-5 H
3BO
4?6×10
-6 MnSO
4?8.3×10
-5
The fermentation end product extracted obtains welan gum and comprise following processing step:
(1) pre-treatment for the first time: fermented liquid is stirred the 70 ℃ of insulations that heat up, be reduced to room temperature;
(2) pre-treatment for the second time: will react after 42 minutes through adding the Gel Treatment agent in the pretreated fermented liquid for the first time, adjustment pH to 3.7 reacts and was the microgel shape to fermented liquid in 40 minutes;
(3) extraction: add extraction agent, make welan gum be fibrous and separate out;
(4) filtration, wash-out pigment and impurity, drying, pulverizing, screening.
Soaking time described in the step (1) is 1 hour; Calcium chloride is selected in Gel Treatment agent described in the step (2) for use, adjusts the pH value and selects hydrochloric acid for use; Extraction agent in the step (3) is selected ethanol for use; Wash-out pigment and impurity in the step (4) are selected 90% ethanol for use, filter and select extrusion machine for use, and drying is selected vacuum-drying for use.
Claims (10)
1, the preparation method of welan gum, comprise fermentation step, be that production bacterial classification inoculation with welan gum ferments in the aseptic culture medium that contains carbon source, nitrogenous source, inorganic salt and water, it is characterized in that described fermenting process is is that 25-36 ℃, pH are to carry out aerobic fermentation under the condition of 6.2-6.7 in temperature, produce bacterial classification and select Sphingol single-cell (Sphingomonas sp) CGMCC1561 for use, the fermentation end product is extracted obtain welan gum.
2, the preparation method of welan gum according to claim 1 is characterized in that described carbon source is selected from sucrose, starch or the hydrolysis sugar in the carbohydrate.
3, the preparation method of welan gum according to claim 1 is characterized in that described nitrogenous source is selected from one or more in yeast extract paste, peptone, bean powder, bean cake powder, the inorganic ammonium salt.
4, the preparation method of welan gum according to claim 1 is characterized in that described fermenting process comprises following process steps:
A, with original strain bevel bacterial classification;
B, the slant strains for preparing in the A step is made seed liquor through enlarged culturing;
C, with the seed liquor for preparing in the B step by seed liquor: fermention medium is that the inoculum size of 8%-10% inserts fermention medium and inserts fermention medium and ferment, and wherein fermention medium comprises following component (g/L):
Starch (hydrolysis sugar) 3.5-4 bean cake powder 0.25-0.3 ammonium nitrate 0.15-0.2
Sal epsom 0.01-0.15 dipotassium hydrogen phosphate 0.1-0.15 lime carbonate 0.1-0.15
Trace element 0.001-0.0015
Culture temperature is that 25-36 ℃, pH6.2-6.7, ventilation are that 0.15-1vvm, fermentation period are 48-96 hour in the fermentation.
5, the preparation method of welan gum according to claim 4 is characterized in that the substratum in the preparation process of slant strains in the described A step comprises following component (g/L):
Sucrose 1-1.2 yeast extract paste 0.25-0.3 extractum carnis 0.25-0.3
Peptone 0.1-0.15 agar 2-2.2 defoamer 0.07-0.1
The pH of substratum is 6.2-6.7.
6, the preparation method of welan gum according to claim 4, it is characterized in that the enlarged culturing in the described B step comprises one-level enlarged culturing and secondary enlarged culturing, slant strains is inserted the substratum of one-level enlarged culturing and make first order seed through fermentation, wherein substratum comprises following component (g/L) in the one-level enlarged culturing:
Sucrose 1-1.2 yeast extract paste 0.25-0.3 extractum carnis 0.25-0.3
Peptone 0.1-0.15 defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 1-2%, culture temperature are that 25-36 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 24-27 hour.
7, the preparation method of welan gum according to claim 6, it is characterized in that described secondary enlarged culturing is that the substratum that first order seed inserts the secondary enlarged culturing is made secondary seed through fermentation, the substratum in the secondary enlarged culturing comprises following component (g/L):
Sucrose 0.85-1 starch 0.2-0.25 ammonium sulfate 0.15-0.2 bean powder 0.15-0.2
Dipotassium hydrogen phosphate 0.1-0.15 potassium primary phosphate 0.04-0.05 sal epsom 0.01-0.15
Defoamer 0.07-0.1
The pH of substratum is that 6.2-6.7, inoculum size are that 8-10%, culture temperature are that 25-36 ℃, ventilation are that 0.12-0.2vvm, fermentation period are 20-24 hour.
8, the preparation method of welan gum according to claim 4 is characterized in that the composition of the trace element described in the described step C is (g/L):
Citric acid 0.1 Ca (OH)
20.005 CuSO
45H
2O 2.5 * 10
-5
CoSO
4?2.8×10
-5 MgSO
4 0.0086 FeSO
4?1.8×10
-3
ZnSO
4?2.8×10
-5 H
3BO
4?6×10
-6 MnSO
4?8.3×10
-5
9, the preparation method of welan gum according to claim 1 is characterized in that the described fermentation end product is extracted obtains welan gum and comprise following processing step:
(1) pre-treatment for the first time: fermented liquid is stirred intensification 60-80 ℃ insulation, be reduced to room temperature;
(2) pre-treatment for the second time: will react after 30-45 minute through adding the Gel Treatment agent in the pretreated fermented liquid for the first time, adjustment pH to 3.5-4.5 reacts and was the microgel shape to fermented liquid in 30-45 minute;
(3) extraction: add extraction agent, make welan gum be fibrous and separate out;
(4) filtration, wash-out pigment and impurity, drying, pulverizing, screening.
10, the preparation method of welan gum according to claim 8 is characterized in that the soaking time described in the step (1) is 1 hour; Calcium chloride is selected in Gel Treatment agent described in the step (2) for use, adjusts the pH value and selects hydrochloric acid for use; Extraction agent in the step (3) is selected ethanol for use; The ethanol that wash-out pigment in the step (4) and impurity are selected 85%-90% for use filters and selects whizzer or extrusion machine for use, and drying is selected vacuum-drying for use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100125110A CN100404558C (en) | 2006-03-24 | 2006-03-24 | Method for preparing a welan gum |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942491A (en) * | 2010-08-10 | 2011-01-12 | 江南大学 | Method for efficiently separating and extracting welan gum from welan gum fermentation liquor |
| CN104404101A (en) * | 2014-11-10 | 2015-03-11 | 河北恒标生物科技有限公司 | Preparation method of paste welan gum |
| CN104845896A (en) * | 2014-09-23 | 2015-08-19 | 中国石油大学(华东) | Strain and method for producing Welan gum |
| CN110042135A (en) * | 2019-05-28 | 2019-07-23 | 河北鑫合生物化工有限公司 | The improved method that welan gum is extracted from welan gum fermentation liquid |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3877411T2 (en) * | 1987-05-07 | 1993-06-24 | Merck & Co Inc | WELAN RUBBER IN CEMENT COMPOSITION. |
| US5175277A (en) * | 1991-03-20 | 1992-12-29 | Merck & Co., Inc. | Rapidly hydrating welan gum |
-
2006
- 2006-03-24 CN CNB2006100125110A patent/CN100404558C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942491A (en) * | 2010-08-10 | 2011-01-12 | 江南大学 | Method for efficiently separating and extracting welan gum from welan gum fermentation liquor |
| CN104845896A (en) * | 2014-09-23 | 2015-08-19 | 中国石油大学(华东) | Strain and method for producing Welan gum |
| CN104404101A (en) * | 2014-11-10 | 2015-03-11 | 河北恒标生物科技有限公司 | Preparation method of paste welan gum |
| CN104404101B (en) * | 2014-11-10 | 2018-03-23 | 河北恒标生物科技有限公司 | The preparation method of lotion welan gum |
| CN110042135A (en) * | 2019-05-28 | 2019-07-23 | 河北鑫合生物化工有限公司 | The improved method that welan gum is extracted from welan gum fermentation liquid |
| CN110042135B (en) * | 2019-05-28 | 2022-11-18 | 河北鑫合生物化工有限公司 | Improved method for extracting welan gum from welan gum fermentation liquor |
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| Publication number | Publication date |
|---|---|
| CN100404558C (en) | 2008-07-23 |
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