CN101700098B - Tryptophan premix - Google Patents
Tryptophan premix Download PDFInfo
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- CN101700098B CN101700098B CN2009101542088A CN200910154208A CN101700098B CN 101700098 B CN101700098 B CN 101700098B CN 2009101542088 A CN2009101542088 A CN 2009101542088A CN 200910154208 A CN200910154208 A CN 200910154208A CN 101700098 B CN101700098 B CN 101700098B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
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Abstract
The invention belongs to the technical filed of fodders and particularly relates to a tryptophan premix; the processing method of the tryptophan premix comprises the following steps: (1) fermenting: mycelia are cultured in liquid medium to obtain matured seeds, and the matured seeds are transplanted to acidification nutrient medium of a fermentation cylinder to be fermented and metabolized to obtain tryptophan fermentation liquid; (2) separation: the tryptophan fermentation liquid carries out solid-liquid separation to obtain clear liquid and thick slurry; (3) mixing: while the thick slurry is stirred, corn cob powder is added, so as to obtain mixture with 0.5-4 percent of tryptophan content; (4) drying: the mixture is dried to control the water content to be 1-10 percent. The tryptophan premix has good palatability to lead animals to like to eat and good feeding effect.
Description
Technical field
The invention belongs to field of feed, particularly a kind of tryptophan premix.
Background technology
Preblend is the abbreviation of additive premix, and it is with one or more minor components and carrier or thinner proportioning on request, the osculant compound feed products of making behind the uniform mixing.Minor component comprises additives such as various trace quantity mineral substance elements, various VITAMIN, synthesizing amino acid.Carrier is the particulate that can carry or adsorb the trace active added ingredients.
Amino acid has two types-indispensable amino acid and non-essential amino acid.Eight kinds of indispensable amino acids are Isoleucines, Methionin, leucine, methionine(Met), phenylalanine, Xie Ansuan, Threonine and tryptophane.It is not because they are more important that these amino acid are called as essential reason, but organism itself can not produce.Therefore, these amino acid must be replenished by daily feed.Non-essential amino acid is the amino acid that some organisms can oneself produce, so not necessarily leave no choice but be included in the food.
Tryptophane is a kind of indispensable amino acid.In all amino acid, it is minimum that tryptophane is considered in the food content.Though rare, tryptophane is being regulated animal appetite, is being kept aspect such as body health and play crucial effect.Studies show that tryptophane can be regulated and control piglet appetite, promote food consumption, the tryptophane deficiency will cause the reduction of pig feed intake.In the weaned piglet stage, piglet separates the back and mixes from different sows and not brood inferior piggy with sow especially, and food is become the solid feed of low nutrition digestion difference by the good liquid breast milk of high nutrition digestion.These variations bring to the piglet after weaning much stress.Therefore, the sharply decline of feed food consumption, growth retardation and the healthy situation that worsens often appear behind the weaned piglet.It is the major cause that piglet growth is obstructed and healthy state worsens that food consumption descends.
How to increase the tryptophane in the feed, people have carried out many exploratory developments.One of method is directly to add the crystal tryptophane in animal-feed, and the shortcoming of this method is that the crystal tryptophane directly is added to and is difficult in the feed mixing.February 7 calendar year 2001, disclosed application number was that 00122268.6 innovation and creation disclose a kind of amino acid whose mixed fodder that contains, this feed is obtained by following method, (1) is selected carrier: be selected from the feedstuff raw material of at least a feed component of cereal seitan meal and cereal seitan fodder meal and intermediate product thereof, wherein said intermediate product obtains in cereal wet-milling step; (2) mix: with raw material with contain amino acid whose amino acid fermentation broth culture of 3 to 80% weight or its treatment soln and mix; (3) drying: the mixture of dry gained, perhaps carry out drying during mixing raw material.Amino acid in this patent document mainly refers to Methionin, Threonine and tryptophane.This method has solved tryptophane and how to be mixed into this problem in the feed equably, but facts have proved the mixed fodder that makes with this method, and palatability is not enough, and livestock and poultry dislike eating, and feeding effect is bad.
Summary of the invention
The object of the present invention is to provide a kind of tryptophan premix, the palatability of this tryptophan premix is better, and it is edible that livestock and poultry are liked, and feeding effect is good.
The scheme that the present invention solve the technical problem is: a kind of tryptophan premix, and its working method may further comprise the steps:
(1) fermentation: cultivate in the thalline liquid medium within and obtain sophisticated seed, sophisticated seed moves into that fermentating metabolism produces the tryptophane fermented feed liquid in the fermention medium of fermentor tank again;
(2) separate: the tryptophane fermented feed liquid is separated into clear liquid and underflow by solid-liquid separation;
(3) mix: underflow adds corn cob meal while stirring, obtains tryptophane and be 0.5～4% compound;
(4) drying: the compound drying makes its water content be controlled at 1～10%.
The present invention adopts tryptophane and corn cob meal to cooperate, corn cob meal utilizes its porous cellularstructure that tryptophane is absorbed in the particle, experimental results show that the Preblend livestock and poultry that obtained by technique scheme extremely like edible, its effect obviously is better than adding separately tryptophane in feed, or obviously is better than the combination of tryptophane and cereal seitan.The possible cause that produces this effect is: (1) tryptophane fermented feed liquid is through process of solid-liquid separation, makes the tryptophane underflow that variation on some proterties take place on the whole, and these variations have caused the palatability of the Preblend of producing to improve greatly.(2) tryptophane underflow and corn cob meal are supported on taste mutually.It is generally acknowledged that corn cob meal contains a large amount of fibers, starch, protein content are less, and it is more coarse to taste, and livestock and poultry can not liked eating.But the present invention mixes corn cob meal with fermented feed liquid, and the applicant finds that pleasantly surprisedly livestock and poultry enjoy a lot to eat.(3) water content eats better to eatly at 1～10% material, and livestock and poultry are acceptant.The stillness of night that the present invention has obtained can be used for making the elaboration tryptophane when adopting separation method to obtain to contain amino acid whose underflow, underflow can make the palatability of Preblend strengthen greatly, has greatly improved the value that process synthesis of the present invention utilizes.
The present invention adopts tryptophane and corn cob meal to cooperate, and experimental results show that the effect of technique scheme obviously is better than adding separately the effect of tryptophane in feed, and this may be that the structure of corn cob has promoted tryptophane metabolism in animal body.And; it is generally acknowledged; corn cob contains a large amount of fibers; its starch, protein content are less; be not suitable as the fine animal-feed; but the present invention with fermented feed liquid with corn cob granule mixing reinforcement all deficiencies of corn cob, greatly improved the utilization ratio of organic nutriment in the fermented feed liquid.
Preferred as such scheme, the thalline in the described step (1) is intestinal bacteria.
Preferred as such scheme, the method for solid-liquid separation be to separate with plate-and-frame filter press in the described step (2), or separates with disk centrifuge, or with the horizontal spiral centrifuge separation, or it is settlement separate directly to add flocculation agent.
Preferred as such scheme, the underflow in the described step (2) contains 0.3～0.5% sugar, 5～15% tryptophane, 30～40% thalline.
Preferred as such scheme, the granularity of described corn cob meal is 40～80 orders.
In order to save the cost of feed of the present invention, the ratio of two kinds of raw materials is preferred as such scheme, and the add-on of corn cob meal is 1/10～1/3 of a underflow in the described step (3).
Preferred as such scheme added inorganic carrier in the described step (3), as preferably, described inorganic carrier is one or more in lime carbonate, silicon-dioxide, the sodium-chlor.Usually inorganic carrier accounts for 0.1～5% of whole Preblend.
Preferred as such scheme, the drying in the described step (4) is an air stream drying.The present invention uses air stream drying to select the waste of avoiding the tryptophane powder to cause because of precipitated and separated with the tryptophane dressing sieve that corn cob granule adsorbs undertighten.
The present invention and preferred version thereof also have following advantage in addition:
(1) the inoculation intestinal bacteria are improved the content of tryptophane in the tryptophane fermented feed liquid greatly;
(2) the tryptophane fermented feed liquid makes purified elaboration tryptophane through solid-liquid separation earlier, and the underflow that separates then is processed to tryptophan premix, and this has greatly improved the economic benefit of tryptophane fermented feed liquid;
(3) 40～80 purpose corn cob meals not only are easy to processing, and can excessively not produce a large amount of dust owing to pulverizing in the course of processing, avoid the excessive or eyes irriate of workman's dust soakage and cause discomfort;
(4) tryptophane deficiency in the compound, it is inevitable inhomogeneous to mix the Preblend of coming out; Tryptophane is too much, because deposition is arranged in following Preblend tryptophane and must be higher than the tryptophane that is arranged in top Preblend, also can increase production cost simultaneously.The mixed weight ratio of corn cob meal and underflow is controlled at described scope, has avoided the tryptophane deficiency to make the uneven situation of tryptophane in the Preblend, and corn cob meal can fully adsorb tryptophane simultaneously, avoids the generation of tryptophane demixing phenomenon.
(5) livestock and poultry are bigger to the requirement of calcium and phosphorus, and calcium and phosphorus are supported mutually in nutrition.At vegetable raw material is that the few phosphorus of calcium is many in the basal diet of leading, and behind the interpolation lime carbonate, has increased the content of calcium in the tryptophan premix in the step (3), after this tryptophan premix adds basal diet to, can regulate the calcium phosphorus balance in the basal diet.Silicon-dioxide is used as anticaking agent in fodder industry, behind the interpolation silicon-dioxide, the anti-caking performance of tryptophan premix increases greatly.The potassium that contains in the basal diet enough satisfies the needs of livestock and poultry, so generally do not consider replenishing of potassium, sodium then lacks, and secondly is chlorine.In step (3), add sodium-chlor, played the effect of sodium and chlorine in the additional basal diet.
Embodiment
Embodiment one
The composition of colibacillary liquid nutrient medium is: glucose 30gL
-1, (NH
4)
2SO
42.0gL
-1, corn steep liquor 30mL, soya-bean cake hydrolyzed solution 20mL, KH
2PO
43H
2O 1.0gL
-1, MgSO
47H
2O 0.4gL
-1, MnSO
4H
2O 0.01gL
-1, FeSO
47H
2O 0.01gL
-1, VB1300 μ g, VH200 μ g, the pH value is controlled at 7.0～7.2.Sterilization pressure is 0.075Mpa, sterilization 15min.Intestinal bacteria are shaking culture 16h in this liquid nutrient medium, and culture temperature is 36 ℃.
Cultivate in the intestinal bacteria liquid medium within and obtain sophisticated seed, sophisticated seed moves in the fermention medium of fermentor tank again and ferments.The composition of fermention medium is: glucose 130gL
-1, (NH
4)
2SO
440gL
-1, phenylalanine Phe 0.15gL
-1, tyrosine Tyr 0.15gL
-1, soya-bean cake hydrolyzed solution 19mL, corn steep liquor 22mL, KH
2PO
43H
2O 10.0gL
-1, MgSO
47H
2O 0.4gL
-1, MnSO
4H
2O 0.01gL
-1, FeSO
47H
2O 0.01gL
-1, VB 1100 μ g, VH50 μ g, the pH value is controlled at 7.0～7.2.Sterilization pressure is 0.075Mpa, behind the sterilization 15min, and the inoculation intestinal bacteria, inoculum size is 10%.Behind 35 ℃ of bottom fermentation 50h, obtain the tryptophane fermented feed liquid.The weight percent of tryptophane is approximately 4% in the fermented feed liquid.
By the separation of disk centrifuge, the tryptophane fermented feed liquid is separated into clear liquid and underflow.The separation of tryptophane fermented feed liquid also can be used plate-and-frame filter press or horizontal spiral centrifuge, and it is settlement separate also can directly to add flocculation agent.
The weight percent of water is approximately 95% in the clear liquid, and the weight percent of tryptophane is approximately 2%, does not have intestinal bacteria in the clear liquid.Clear liquid flows through ion exchange resin column with certain flow, and the clear liquid that flows through can return resin column again and heavily adsorb, and tryptophane all is adsorbed on the ion exchange resin.Then from ion exchange resin column bottom with certain flow water flowing back washing.The elutriant of ion exchange column enters the economic benefits and social benefits concentration systems subsequently to carry out heating under vacuum and concentrates, and elutriant concentration is raise, and squeezes into crystallizer then.Crystallizer adopts jacketed type, regulates pH near the iso-electric point 5.89 of tryptophane with oxalic acid in crystallizer, feeds refrigerated water then in chuck, and the tryptophane solution temperature is reduced and crystallization.Crystal in the crystallizer and solution are sent into tripod pendulum type batch centrifugal together and are carried out centrifugally, and the crystal after centrifugal is sent into baking oven and carried out drying, thereby obtains the product tryptophane.Because extracting method is the ion exchange column method, the products obtained therefrom tryptophane can reach 98.5%.
The weight percent of sugar is approximately 0.3～0.5% in the underflow, and the weight percent of tryptophane is approximately 5～15%, and colibacillary weight percent is approximately 30%.Before corn cob meal is joined underflow, the lime carbonate of feed grade is added in the underflow that is whipped state, continue to stir 2 minutes, again 40 purpose corn cob meals are joined in the underflow that is whipped state, the add-on of corn cob meal is 1/3 of a underflow, obtains tryptophane and be 0.5% compound.The parts by weight of lime carbonate are 0.1% in the compound.Compound makes its water content be controlled at 10% through the air stream drying drying.
Embodiment two
Embodiment two is with the difference of embodiment one: before corn cob meal is joined underflow, the silicon-dioxide and the sodium-chlor of feed grade are added in the underflow that is whipped state, continue to stir 4 minutes, again 80 purpose corn cob meals are joined in the underflow that is whipped state, the add-on of corn cob meal is 1/10 of a underflow, obtains tryptophane and be 4% compound.The parts by weight of silicon-dioxide and sodium-chlor are 3% in the compound.Compound makes its water content be controlled at 1% through the air stream drying drying.
Embodiment three
Embodiment three is with the difference of embodiment one: before corn cob meal is joined underflow, lime carbonate, silicon-dioxide and the sodium-chlor of feed grade are added in the underflow that is whipped state, continue to stir 8 minutes, again 60 purpose corn cob meals are joined in the underflow that is whipped state, the add-on of corn cob meal is 1/5 of a underflow, obtains tryptophane and be 2% compound.The parts by weight of lime carbonate, silicon-dioxide and sodium-chlor are 5% in the compound.Compound makes its water content be controlled at 3% through the air stream drying drying.
Embodiment four
Embodiment four is with the difference of embodiment one: before corn cob meal is joined underflow, the lime carbonate and the sodium-chlor of feed grade are added in the underflow that is whipped state, continue to stir 4 minutes, again 70 purpose corn cob meals are joined in the underflow that is whipped state, the add-on of corn cob meal is 1/7 of a underflow, obtains tryptophane and be 1% compound.The parts by weight of lime carbonate and sodium-chlor are 4% in the compound.Compound makes its water content be controlled at 8% through the air stream drying drying.
Test example one
Select 30 the 42 DLYs wean porklings about age in days, DLY also claims the ternary pig, is produced by Du Luoke, long white, Large White three boars hybridization.The test porkling is raised in high bed guard rail, and free choice feeding is freely drunk water, and regularly clean every day.Immune programme for children carries out routinely.In high bed guard rail, prepare 3 groups of feeds.Feed 1 is corn-dregs of beans-Zein powder-fish meal type basal diet, contains crude protein 17.8%, Methionin 1.15%, methionine(Met)+Gelucystine 0.65%, Threonine 0.75%, tryptophane 0.18% in this basal diet.Feed 2 is to add contrast Preblend in the basal diet, and this contrast Preblend is made according to embodiment one described method by wheat bran instead of corn core powder, and the addition of this contrast Preblend accounts for 5% of basal diet gross weight.Feed 3 is to add by tryptophan premix of the present invention in the basal diet, and this tryptophan premix is made by embodiment one, and its addition accounts for 5% of basal diet gross weight.These 3 groups of feeds place the different positions of high bed guard rail, and each position all has enough spaces allow 30 piglet ad libs.Trial period is 10 days, and statistics is gone the quantity of these 3 groups of feed place feed piglets, and add up once noon every day.Statistics sees the following form:
| ? | Feed 1 | Feed 2 | Feed 3 |
| First day | 8 | 15 | 7 |
| Second day | 9 | 9 | 12 |
| The 3rd day | 11 | 8 | 11 |
| The 4th day | 4 | 9 | 17 |
| The 5th day | 7 | 9 | 14 |
| The 6th day | 4 | 5 | 21 |
| The 7th day | 5 | 4 | 21 |
| The 8th day | 5 | 1 | 24 |
| The 9th day | 5 | 3 | 22 |
| The tenth day | 2 | 3 | 25 |
As seen from table: after adding the Preblend by the embodiment of the invention one gained in the basal diet, it is edible that piglet is obviously liked, and after the 6th day, all has every day the piglet above 2/3rds to go the feed of feed 3 places.
Test example two
Select 108 the 42 DLY wean porklings about age in days.Test divides 3 groups and carries out.First group of totally 36 porkling, feed for nursing 1, feed 1 is corn-dregs of beans-Zein powder-fish meal type basal diet, contains crude protein 17.8%, Methionin 1.15%, methionine(Met)+Gelucystine 0.65%, Threonine 0.75%, tryptophane 0.18% in this basal diet.Second group of totally 36 porkling, feed for nursing 2, feed 2 are to add contrast Preblend in the basal diet, and this contrast Preblend is made according to embodiment one described method by wheat bran instead of corn core powder, and the addition of this contrast Preblend accounts for 5% of basal diet gross weight.The 3rd group of totally 36 porklings, feed for nursing 3, feed 3 are to add by tryptophan premix of the present invention in the basal diet, and this tryptophan premix is made by embodiment one, and its addition accounts for 5% of basal diet gross weight.Trial period is 10 days.The test porkling is raised in high bed guard rail, and free choice feeding is freely drunk water, and regularly clean every day.Immune programme for children carries out routinely.Piglet claims individual weight on an empty stomach when on-test and end, and feed consumption during the statistical test calculates average daily gain, daily ingestion amount and feedstuff-meat ratio.Statistics sees the following form:
| ? | Initial weight (kg) | End heavy (kg) | Day weight gain (g/d) | Daily ingestion amount (g/d) | Feedstuff-meat ratio |
| Feed 1 | 11.85 | 12.95 | 109.89 | 269.23 | 2.45 |
| Feed 2 | 11.85 | 13.32 | 146.78 | 312.62 | 2.13 |
| Feed 3 | 11.81 | 13.73 | 192.48 | 387.07 | 1.97 |
As seen from table: in basal diet, add described tryptophane premixed feed, significantly improved the day weight gain of piglet, improve 75.16%, improve 31.14% than the porkling of feed for nursing 2 than the porkling of feed for nursing 1; Daily ingestion amount also is significantly improved, and improves 43.77% than the porkling of feed for nursing 1, improves 23.81% than the porkling of feed for nursing 2; The piglet meat ratio obviously descends, than the porkling reduction by 19.59% of feed for nursing 1, than the porkling reduction by 7.51% of feed for nursing 2.
Test example three
Select the Ai Wei mattress fryer in 30 1 ages in week, Ai Wei mattress fryer is the white plumage fryer of the three series mating kind that U.S. Ai Wei mattress international corporation cultivates, and has fast gaining, surviving rate height, good characteristics that the price of deed is high.The stable breeding of Ai Wei mattress fryer, free choice feeding is freely drunk water, and regularly clean every day.Immune programme for children carries out routinely.In the chicken circle, prepare 3 groups of feeds.Feed 1 is corn-dregs of beans type feed, and the weight ratio of corn and dregs of beans is about 60: 15 in this feed.Feed 2 is to add contrast Preblend in corn-dregs of beans type feed, and this contrast Preblend is made according to embodiment three described methods by wheat bran instead of corn core powder, and the addition of this contrast Preblend accounts for 5% of corn-dregs of beans type feed gross weight.Feed 3 is to add by tryptophan premix of the present invention in corn-dregs of beans type feed, and this tryptophan premix is made by embodiment three, and its addition accounts for 5% of corn-dregs of beans type feed gross weight.These 3 groups of feeds place the different positions of Ji Quan, and each position all has enough spaces allow 30 fryer ad libs.Trial period is 10 days, and statistics is gone the quantity of these 3 groups of feed place feed fryer, and add up once noon every day.Statistics sees the following form:
| ? | Feed 1 | Feed 2 | Feed 3 |
| First day | 5 | 13 | 12 |
| Second day | 4 | 13 | 13 |
| The 3rd day | 5 | 11 | 14 |
| The 4th day | 6 | 7 | 17 |
| The 5th day | 7 | 8 | 15 |
| The 6th day | 2 | 11 | 17 |
| The 7th day | 1 | 4 | 25 |
| The 8th day | 3 | 3 | 24 |
| The 9th day | 3 | 1 | 26 |
| The tenth day | 4 | 2 | 24 |
As seen from table: after adding Preblend in corn-dregs of beans type feed by the embodiment of the invention three gained, Ai Wei mattress fryer obviously likes edible, since first day, just there is Ai Wei mattress fryer over half to go the feed of feed 3 places, after the 7th day, all there is every day Ai Wei mattress fryer to go feed 3 to go out feed above 2/3rds.
Claims (4)
1. tryptophan premix, it is characterized in that: its working method may further comprise the steps:
(1) fermentation: cultivate in the intestinal bacteria liquid medium within and obtain sophisticated seed, sophisticated seed moves into that fermentating metabolism produces the tryptophane fermented feed liquid in the fermention medium of fermentor tank again;
(2) separate: the tryptophane fermented feed liquid passes through solid-liquid separation, be separated into clear liquid and underflow, the method of solid-liquid separation is for to separate with plate-and-frame filter press, or separate with disk centrifuge, or separate with horizontal spiral centrifuge, or it is settlement separate directly to add flocculation agent, and the underflow after the separation contains 0.3～0.5% sugar, 5～15% tryptophane, 30～40% intestinal bacteria;
(3) mix: underflow adds corn cob meal while stirring, and the granularity of corn cob meal is 40～80 orders, and the add-on of corn cob meal is 1/10～1/3 of a underflow, obtains tryptophane and be 0.5～4% compound;
(4) drying: the compound drying makes its water content be controlled at 1～10%.
2. a kind of tryptophan premix as claimed in claim 1 is characterized in that: the clear liquid in the described step (2) obtains tryptophane by ion-exchange, condensing crystal, centrifugal drying.
3. a kind of tryptophan premix according to claim 1 is characterized in that: the drying in the described step (4) is an air stream drying.
4. a kind of tryptophan premix according to claim 1 is characterized in that: one or more in the described step (3) in interpolation lime carbonate, silicon-dioxide, the sodium-chlor.
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| CN101999526A (en) * | 2010-11-24 | 2011-04-06 | 安徽丰原发酵技术工程研究有限公司 | Method for treating L-tryptophan waste mother solution |
| CN101999529B (en) * | 2010-12-09 | 2012-12-12 | 新疆天富阳光生物科技有限公司 | Method for making tryptophan premix |
| CN103168927B (en) * | 2010-12-20 | 2015-01-14 | 浙江升华拜克生物股份有限公司 | Granular tryptophan premix and preparation method thereof |
| CN102090516B (en) * | 2010-12-20 | 2013-04-17 | 浙江升华拜克生物股份有限公司 | Particle tryptophan premix and preparation method thereof |
| CN102742721A (en) * | 2011-04-20 | 2012-10-24 | 源富生物科技股份有限公司 | Palatability enhanced protein product and its preparation method |
| CN102258765B (en) * | 2011-07-11 | 2013-09-04 | 浙江升华拜克生物股份有限公司 | Preparation method of colistin sulfate premix |
| CN110583855A (en) * | 2019-10-23 | 2019-12-20 | 合肥五粮泰生物科技有限公司 | Preparation method of high tryptophan fermented feed |
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| CN1170515A (en) * | 1996-05-31 | 1998-01-21 | 底古萨股份公司 | Process for preparation of animal feed supplement based on fermentation broth |
| CN101565395A (en) * | 2009-05-25 | 2009-10-28 | 河南孟成生物药业股份有限公司 | Technique for extracting L-tryptophan in fermentation liquor |
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- 2009-11-15 CN CN2009101542088A patent/CN101700098B/en active Active
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|---|---|---|---|---|
| CN1170515A (en) * | 1996-05-31 | 1998-01-21 | 底古萨股份公司 | Process for preparation of animal feed supplement based on fermentation broth |
| CN101565395A (en) * | 2009-05-25 | 2009-10-28 | 河南孟成生物药业股份有限公司 | Technique for extracting L-tryptophan in fermentation liquor |
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| Title |
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| 司晶星.色氨酸工厂发酵与分离工艺过程控制.《才智》.2009,(第19期),71. * |
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