CN102090516A - Particle tryptophan premix and preparation method thereof - Google Patents
Particle tryptophan premix and preparation method thereof Download PDFInfo
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- CN102090516A CN102090516A CN2010105962832A CN201010596283A CN102090516A CN 102090516 A CN102090516 A CN 102090516A CN 2010105962832 A CN2010105962832 A CN 2010105962832A CN 201010596283 A CN201010596283 A CN 201010596283A CN 102090516 A CN102090516 A CN 102090516A
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Abstract
The invention relates to a tryptophan premix, in particular to a particle tryptophan premix and a preparation method thereof, which belong to the technical field of feeds. The particle tryptophan premix comprises 20-25 percent by weight of tryptophan and 2-4 percent by weight of moisture and has the particle density between 0.56 g/cm<3> and 0.75 g/cm<3>, the particle size between 20 meshes and 60 meshes and the pH value between 6 and 8. The invention also provides the preparation method of the particle tryptophan premix. The method comprises the following steps of: fermenting; separating and concentrating; mixing; guniting and pelletizing; and coating in multiple stages. The production process of the method has low dust content, and clean production is realized; the particle tryptophan premix is not delaminated easily when mixed with other feed materials; the feed is hardly influenced by the outside and has longer shelf life which is up to 2 2.5 years; meanwhile, due to appropriate moisture content, livestock can chew in a better way; and the premix has high free flowability and is not compacted during storage.
Description
Technical field
The present invention relates to a kind of tryptophan pre-mixing agent, particularly a kind of particle tryptophan pre-mixing agent and preparation method thereof belongs to field of feed.
Background technology
Pre-mixing agent is the abbreviation of additive premix, and it is with one or more microcomponents and carrier or diluent proportioning on request, the osculant compound feed products of making after evenly mixing.Microcomponent 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 adding ingredient.
Amino acid has two type of one essential amino acid and nonessential amino acid.Eight kinds of essential amino acids are isoleucines, lysine, leucine, methionine, phenylalanine, valine, threonine and tryptophan.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.Nonessential amino acid is the amino acid that some organisms can oneself produce, so not necessarily leave no choice but be included in the food.
Tryptophan is a kind of essential amino acid.In all amino acid, it is minimum that tryptophan is considered in the food content.Though rare, tryptophan is being regulated animal appetite, is being kept aspect such as body health and play crucial effect.
The granularity of the tryptophan pre-mixing agent on the existing market generally is the 100-200 order, and dust was too big when this tryptophan pre-mixing agent was produced, and makes direct labor's allergy easily, direct labor's health is produced harmful effect, is difficult to realize cleaning production; In addition, tryptophan pre-mixing agent moisture resistance is low, the shelf-life is shorter, is 6-8 month, and when adding to powdery tryptophan pre-mixing agent in the feed, because the proportion of other materials differs bigger in powdery pre-mixing agent proportion and the feed, easy layering during mixing causes result of use poor.
Summary of the invention
One of purpose of the present invention provide a kind of add to be difficult in the feed that layering, moisture resistance are good, long shelf-life, particle tryptophan pre-mixing agent easy to use.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of particle tryptophan pre-mixing agent contain tryptophan and calcium carbonate, and tryptophane is 20-25wt%, and moisture is 2-4%, and grain density is 0.56-0.75g/cm
3, particle size is the 20-60 order, the pH value is 6-8.
In a certain proportion of tryptophan pre-mixing agent, add calcium carbonate, can increase the calcium content in the pre-mixing agent, after this tryptophan pre-mixing agent adds in the feed, can regulate nutrition-allocated proportion wherein.When particle tryptophan pre-mixing agent adds in the feed as feed addictive, its tryptophane and moisture make its density value near other materials such as corn, barley, Chinese sorghum isodensity in the feed, its granularity is suitable simultaneously, be not prone to layering after having guaranteed it like this and other materials mixing, only have top one deck when preventing some livestock and poultry food and cause nutrition inhomogeneous; And the pH value of particle tryptophan pre-mixing agent and moisture make particle tryptophan pre-mixing agent be subjected to ectocine little, and the shelf-life is longer, can reach 2-2.5.Not only moisture resistance is poor less than 2% as if moisture, and influences the density of product, influences the shelf-life greater than 4%, and simultaneously, it is good that suitable moisture can make livestock and poultry chew the mouth of a river.In addition, the density of particle tryptophan pre-mixing agent of the present invention and particle size make this pre-mixing agent have good free flowability, also can not produce compacting, conglomeration situation when depositing.
A kind of preferred as technical solution of the present invention, described particle tryptophan pre-mixing agent comprises kernel and integument, and described integument successively wraps up, and the number of plies is the 3-200 layer.The graininess pre-mixing agent that comprises multilayer is controlled granularity easily, and the intensity height, is difficult for fragmentation, can be evenly distributed in the feed, is difficult for layering.
A kind of preferred as technical solution of the present invention, described grain density is 0.58-0.66g/cm
3
A kind of preferred as technical solution of the present invention, described particle particle size is the 30-50 order, the pH value is 7-7.5.
Another purpose of the present invention provides the preparation method that a kind of energy realization cleans the described particle tryptophan pre-mixing agent of production, may further comprise the steps:
(1) fermentation: cultivate in the thalline liquid medium within and obtain ripe seed, ripe seed moves into that fermentation produces the tryptophan zymotic fluid in the culture medium of fermentation tank again;
(2) separation concentrates: the tryptophan zymotic fluid concentrates and obtains underflow, and solid content is 30-35% in the underflow, and tryptophane is the 8-15wt% of underflow total amount;
(3) mix: in underflow, add the calcium carbonate that accounts for underflow total amount 15-20wt% while stirring, get mixed liquor;
(4) slurry-spraying pelletizing: mixed liquor is formed spraying, upwards spray the hot gas that includes calcium carbonate simultaneously, form primary granule;
(5) multistage parcel: the spraying that mixed liquor is formed contacts and wraps up described primary granule formation secondary granule, repeats this step and finally obtains ultimate particle.
Calcium carbonate is the good carrier of tryptophan when mixing with underflow, serves as the spraying of nucleus and mixed liquor again and form primary granule in slurry-spraying pelletizing, but also increased the calcium content in the final products.When calcium carbonate mixed with underflow, if the calcium carbonate deficiency, some tryptophan can not mix the mixed liquor uneven components of coming out with calcium carbonate as carrier; If calcium carbonate is too much, then being positioned at top calcium carbonate can cause top tryptophane greater than following tryptophane most tryptophan absorption.Add the calcium carbonate of 15-20wt% during mixing, form uniform mixed liquor.
After primary granule formed during slurry-spraying pelletizing, the mixed liquor spraying was repeatedly wrapped up primary granule again and is formed ultimate particle, and dust is little during production, can realize cleaning production.Solved the prior art pre-mixing agent and be pulverous shortcoming, realized that the granulating of pre-mixing agent and moulding are fast, production efficiency is high, guaranteed that simultaneously the tryptophan of pre-mixing agent particle is evenly distributed.
A kind of preferred as technical solution of the present invention, described step (2) method for concentration is an evaporation and concentration.
A kind of preferred as technical solution of the present invention, the granularity of calcium carbonate is the 80-120 order in the described step (3).In this step, calcium carbonate mainly serves as carrier, and the calcium carbonate of described particle size range helps carrying absorption tryptophan.
A kind of preferred as technical solution of the present invention, the temperature of hot gas is 120-140 ℃ in the described step (4).
A kind of preferred as technical solution of the present invention, calcium carbonate be sphere in the described step (4), granularity is the 60-80 order.Calcium carbonate mainly contains cube, needle-like and spherical three kinds of crystalline forms, and the preferred spherical calcium carbonate of the present invention is convenient to form spherical primary granule.In this step, calcium carbonate mainly serves as nucleus, therefore selects the bigger calcium carbonate of relative step (3) granularity for use, is convenient to form the primary granule of suitable size.If the nucleus granularity is excessive, then primary granule is big, and the tryptophane on the ultimate particle can be lower, do not reach nutritional requirement.And in the calcium carbonate granularity of serving as nucleus should be controlled among a small circle, particle size range was little, epigranular then, and the ultimate grain graininess of formation is also more even, and the inventor discovers that the feed pre-mixing agent of uniform particle size can improve livestock and poultry body weight gains and feed conversion rate.
More preferably, the calcium carbonate granularity in the described step (4) is 70 orders.
In sum, the present invention has following beneficial effect:
1. tryptophane in the particle tryptophan pre-mixing agent of the present invention and moisture make its density value near other materials of feed such as corn, barley, Chinese sorghum isodensity, be not prone to layering after when mixing, only have top one deck when preventing some livestock and poultry food and cause nutrition inhomogeneous with other materials; And the pH value of particle tryptophan pre-mixing agent and moisture make particle tryptophan pre-mixing agent be subjected to ectocine little, and the shelf-life is longer, can reach 2-2.5, and simultaneously, it is good that suitable moisture makes livestock and poultry chew the mouth of a river; The density of particle tryptophan pre-mixing agent of the present invention and particle size make this pre-mixing agent have good free flowability, also can not produce compacting, conglomeration situation when depositing;
2. particle tryptophan pre-mixing agent production process dust of the present invention is low, can realize cleaner production.
The specific embodiment
Embodiment one
The nutrient solution that contains sugar, inorganic salts is after sterilization, the inoculation Escherichia coli fermentation, mend sugar during the fermentation, mend ammonia, the fermentation back produces the tryptophan zymotic fluid, evaporation and concentration then detects with high performance liquid chromatograph simultaneously, stops evaporation during 12wt% that the underflow solid content is 33%, tryptophane is the underflow total amount, add in the underflow while stirring and account for underflow total amount 18wt%, 90 purpose calcium carbonate, mixed liquor; Mixed liquor is compressed air atomizing and forms spraying, upwards sprays 130 ℃ the hot gas that includes 70 purpose spherical calcium carbonate particles simultaneously and forms primary granule; Mixed liquor is sprayed at and continues contact in the granulation chamber and wrap up described primary granule to form secondary granule, particle is motion capable of circulation in granulation chamber, therefore can repeatedly repeat this parcel step finally obtains ultimate particle, the number of plies of parcel was determined by the production time, production time is 3h, finally obtains ultimate particle.Moist ultimate particle carries out predrying earlier, carries out depth drying after forming half-dried particle, forms dried particles at last, discharges.
After testing, the tryptophane in the final products particle tryptophan pre-mixing agent is 23wt%, and moisture is 3%, and grain density is 0.66g/cm
3, particle size is 30 orders, the pH value is 8.
Mix the layering test: particle tryptophan pre-mixing agent product 100g and 1.9kg feed basal diet are mixed, the cloth bag of packing into, cloth bag is placed on vibrating device internal vibration 10min, the 20g material of getting upper strata, middle level and bottom respectively detects, the particle tryptophan pre-mixing agent content on upper strata is 4.92%, the particle tryptophan pre-mixing agent content in middle level is 5.02%, and the particle tryptophan pre-mixing agent content of bottom is 5.03%.Compound is even, does not have lamination substantially.
Filter membrane dust measuring method is adopted in the dust test.The dust measuring principle is extract to gather the dust laden air of certain volume with dust sampler, and dust laden air is during by filter membrane, and dust is trapped on the filter membrane, calculates dust concentration according to the weightening finish of filter membrane.
Adopt dust sampler to detect dust concentration in the production scene, detected once in per 10 minutes, detect 5 times, average, dust concentration is 0.8mg/m
3
Mix layering experiment, dust test and shelf-life experimental result and see Table 1.
Comparing embodiment one
100 purpose tryptophan pre-mixing agent workshop mean dust concentrations are 15mg/m on the existing market
3, surpass 10mg/m in the workshop
3The dust maximum permissible concentration.
Adopt embodiment one identical method to do and mix the layering test, the 20g material of getting upper strata, middle level and bottom respectively detects, the particle tryptophan pre-mixing agent content on upper strata is 0.8%, the particle tryptophan pre-mixing agent content in middle level is 1.5%, the particle tryptophan pre-mixing agent content of bottom is 16%, and the mixing lamination is obvious.
Experimental result sees Table 1.
Embodiment two
The nutrient solution that contains sugar, inorganic salts is after sterilization, the inoculation Escherichia coli fermentation, mend sugar during the fermentation, mend ammonia, the fermentation back produces the tryptophan zymotic fluid, adopt the filtration method Separation of Solid and Liquid then, detect with high performance liquid chromatograph simultaneously, stop evaporation during 15wt% that the underflow solid content is 30%, tryptophane is the underflow total amount, add in the underflow while stirring and account for underflow total amount 20wt%, 80 purpose calcium carbonate, mixed liquor; Mixed liquor is formed spraying, upwards spray 140 ℃ hot gas simultaneously, comprising particle size in the hot gas is the cube shaped calcium carbonate of 80 purposes, and ensuing prilling is with embodiment one, and the production time is 1.8h.
After testing, the tryptophane in the final products particle tryptophan pre-mixing agent is 21wt%, and moisture is 2%, and grain density is 0.62g/cm
3, particle size is 60 orders, the pH value is 7.
The 20g material of getting upper strata, middle level and bottom respectively detects, and the particle tryptophan pre-mixing agent content on upper strata is 4.88%, and the particle tryptophan pre-mixing agent content in middle level is 5%, and the particle tryptophan pre-mixing agent content of bottom is 5.06%.Compound is even, does not have lamination substantially.
Mix layering experiment, dust test and shelf-life experimental result and see Table 1.
Comparing embodiment two
200 purpose tryptophan pre-mixing agent workshop mean dust concentrations are 18mg/m on the existing market
3
Adopt embodiment one identical method to do to mix the layering test, leave standstill and find after 3 minutes that compound has lamination.
Mix layering experiment, dust test and shelf-life experimental result and see Table 1.
The material of getting upper strata, middle level and bottom detects respectively, and the particle tryptophan pre-mixing agent content on upper strata is 0.4%, and the particle tryptophan pre-mixing agent content in middle level is 3.5%, and the particle tryptophan pre-mixing agent content of bottom is 20%, and the mixing lamination is obvious.
Embodiment three
The nutrient solution that contains sugar, inorganic salts is after sterilization, the inoculation Escherichia coli fermentation, mend sugar during the fermentation, mend ammonia, the fermentation back produces the tryptophan zymotic fluid, evaporation and concentration then detects with high performance liquid chromatograph simultaneously, stops evaporation during 8wt% that the underflow solid content is 35%, tryptophane is the underflow total amount, add in the underflow while stirring and account for underflow total amount 15wt%, 120 purpose calcium carbonate, mixed liquor; Mixed liquor is formed spraying, upwards spray 120 ℃ hot gas simultaneously, comprising particle size in the hot gas is 60 purpose aciculiform calcium carbonate, and ensuing prilling is with embodiment one, and the production time is 3.6h.
After testing, the tryptophane in the final products particle tryptophan pre-mixing agent is 25wt%, and moisture is 2.6%, and grain density is 0.75g/cm
3, particle size is 20 orders, the pH value is 6.5.
The 20g material of getting upper strata, middle level and bottom respectively detects, and the particle tryptophan pre-mixing agent content on upper strata is 4.89%, and the particle tryptophan pre-mixing agent content in middle level is 4.99%, and the particle tryptophan pre-mixing agent content of bottom is 5.01%.Compound is even, does not have lamination substantially.
Mix layering experiment, dust test and shelf-life experimental result and see Table 1.
Embodiment four
The nutrient solution that contains sugar, inorganic salts is after sterilization, the inoculation Escherichia coli fermentation, mend sugar during the fermentation, mend ammonia, the fermentation back produces the tryptophan zymotic fluid, evaporation and concentration then detects with high performance liquid chromatograph simultaneously, stops evaporation during 9.5wt% that the underflow solid content is 32%, tryptophane is the underflow total amount, add in the underflow while stirring and account for underflow total amount 16wt%, 110 purpose calcium carbonate, mixed liquor; Mixed liquor is formed spraying, upwards spray 128 ℃ hot gas simultaneously, comprising particle size in the hot gas is 65 purpose spherical calcium carbonates, and ensuing prilling is with embodiment one, and the production time is 2.1h.
After testing, the tryptophane in the final products particle tryptophan pre-mixing agent is 20wt%, and moisture is 3.1%, and grain density is 0.58g/cm
3, particle size is 40 orders, the pH value is 7.5.
The 20g material of getting upper strata, middle level and bottom respectively detects, and the particle tryptophan pre-mixing agent content on upper strata is 4.99%, and the particle tryptophan pre-mixing agent content in middle level is 5%, and the particle tryptophan pre-mixing agent content of bottom is 5.02%.Compound is even, does not have lamination substantially.
Mix layering experiment, dust test and shelf-life experimental result and see Table 1.
The different tryptophan pre-mixing agent of table 1 performance relatively
| Test | Embodiment one | Embodiment two | Embodiment three | Embodiment four | Comparing embodiment one | Comparing embodiment two |
| Whether layering is arranged | Do not have | Do not have | Do not have | Do not have | Have | Have |
| Dust concentration (mg/m 3） | 0.8 | 1.1 | 1 | 0.9 | 15 | 18 |
| Shelf-life (moon) | 55 | 48 | 50 | 52 | 8 | 6 |
Claims (10)
1. a particle tryptophan pre-mixing agent contains tryptophan and calcium carbonate, it is characterized in that: tryptophane is 20-25wt%, and moisture is 2-4%, and grain density is 0.56-0.75g/cm
3, particle size is the 20-60 order, the pH value is 6-8.
2. particle tryptophan pre-mixing agent according to claim 1 is characterized in that: described particle tryptophan pre-mixing agent comprises kernel and integument, and described integument successively wraps up, and the number of plies is the 3-200 layer.
3. particle tryptophan pre-mixing agent according to claim 1 is characterized in that: described grain density is 0.58-0.66g/cm
3
4. particle tryptophan pre-mixing agent according to claim 1 is characterized in that: particle size is the 30-50 order, and the pH value is 7-7.5.
5. according to the preparation method of the described particle tryptophan of each claim of claim 1-4 pre-mixing agent, may further comprise the steps:
(1) fermentation: cultivate in the thalline liquid medium within and obtain ripe seed, ripe seed moves into that fermentation produces the tryptophan zymotic fluid in the culture medium of fermentation tank again;
(2) separation concentrates: the tryptophan zymotic fluid concentrates and obtains underflow, and solid content is 30-35% in the underflow, and tryptophane is the 8-15wt% of underflow total amount;
(3) mix: add in the underflow while stirring and account for underflow total amount 15-20wt% calcium carbonate, must mixed liquor;
(4) slurry-spraying pelletizing: mixed liquor is formed spraying, upwards spray the hot gas that includes calcium carbonate simultaneously, form primary granule;
(5) multistage parcel: the spraying that mixed liquor is formed contacts and wraps up described primary granule formation secondary granule, repeats this step and finally obtains ultimate particle.
6. the preparation method of particle tryptophan pre-mixing agent according to claim 5 may further comprise the steps: described step (2) method for concentration is an evaporation and concentration.
7. the preparation method of particle tryptophan pre-mixing agent according to claim 5 may further comprise the steps: the granularity of calcium carbonate is the 80-120 order in the described step (3).
8. the preparation method of particle tryptophan pre-mixing agent according to claim 5 may further comprise the steps: the temperature of hot gas is 120-140 ℃ in the described step (4).
9. the preparation method of particle tryptophan pre-mixing agent according to claim 5 may further comprise the steps: calcium carbonate is for spherical in the described step (4), and granularity is the 60-80 order.
10. the preparation method of particle tryptophan pre-mixing agent according to claim 9 may further comprise the steps: the granularity of calcium carbonate is 70 orders in the described step (4).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102258125A (en) * | 2011-08-15 | 2011-11-30 | 安徽丰原发酵技术工程研究有限公司 | Method for treating L-tryptophane fermentation liquor |
| 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 |
| CN103652371A (en) * | 2013-12-11 | 2014-03-26 | 浙江升华拜克生物股份有限公司 | Particle tryptophan premix and preparation method thereof |
| CN105661041A (en) * | 2016-01-11 | 2016-06-15 | 浙江国光生化股份有限公司 | Method for preparing granular feed additives based on powdery L-shaped amino acids |
| CN109321434A (en) * | 2018-12-05 | 2019-02-12 | 江苏澳创生物科技有限公司 | A kind of tryptophan feed additive production system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105661041A (en) * | 2016-01-11 | 2016-06-15 | 浙江国光生化股份有限公司 | Method for preparing granular feed additives based on powdery L-shaped amino acids |
| CN109321434A (en) * | 2018-12-05 | 2019-02-12 | 江苏澳创生物科技有限公司 | A kind of tryptophan feed additive production system |
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