CN102154397B - Method for producing glutamic acid from corn immersing water in biotin-suboptimal fermentation process - Google Patents
Method for producing glutamic acid from corn immersing water in biotin-suboptimal fermentation process Download PDFInfo
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Abstract
The invention discloses a method for producing glutamic acid from corn immersing water in a biotin-suboptimal fermentation process. The innovation of the method is that: a fermentation culture medium is prepared from the corn immersing water instead of corn steep liquor in the biotin-suboptimal fermentation process, so that the glutamic acid is produced by fermenting. The process is convenient to operate and water-saving and energy-saving, is favorable for reducing the fermenting cost of the glutamic acid and is suitable to be popularized comprehensively in the production. By the method, primary water for batching can be saved, the energy consumed by the further evaporation concentration of the corn immersing water also can be saved, the problems of environmental pollution and energy consumption which are caused by producing the corn steep liquor (powder) by utilizing the corn immersing water are solved, and the acid-producing rate and saccharic acid conversion rate of the glutamic acid are improved simultaneously.
Description
Technical field
The invention belongs to biological technical field, specifically relate to a kind of method that is used for vitamin H suboptimal dose zymotechnique production L-glutamic acid with soak water of maize instead of corn slurry.
Background technology
Can produce a large amount of water that soak in the W-Gum production process, its dry matter content accounts for 7%～9%, pH value 3.9～4.1, wherein biological available main component is glucose, each seed amino acid and trace element, also contains biology in addition and carries out the essential vitamin H of vital movement, riboflavin, VITMAIN B1 etc.Traditional method of utilizing soak water of maize is that further evaporation concentration is produced corn steep liquor or concentrated back whitewashing production corn starch, and this not only consumes a large amount of energy, also contaminate environment.
Corn steep liquor is an important raw and processed materials of L-glutamic acid vitamin H suboptimal dose zymotechnique, and corn steep liquor, glucose, inorganic salt, amino acid hydrolyticsolution etc. are according to the requirement batching of fermentating formula, and the inoculation of sterilization back is fermented.Raw materials such as traditional L-glutamic acid vitamin H suboptimal dose zymotechnique requires in the fermentation blending process, the use corn steep liquor and a water are prepared burden, and water consumption is huge; And soak water of maize concentrates the water of condensation that produces after treatment because the ammonia-nitrogen content height can not directly discharge, and just can discharge after must carrying out a biological disposal upon, otherwise can cause serious environmental to pollute.
The Chinese patent literature of publication number CN 1880465A (application number 200510043807.4) discloses a kind of method of producing lysine by soaking water of maize, is to replace soybean meal hydrolysate to prepare fermention medium, the method for fermentative production Methionin with soak water of maize.The Chinese patent literature of publication number CN 1912102A (application number 200610068445.9) discloses a kind of method of utilizing soak water of maize to produce fodder yeast.The Chinese patent literature of application publication number CN 101880634A (application number 201010201736.7) discloses a kind of method of producing fodder yeast with soak water of maize.Above-mentioned document has been inquired into the reasonable utilization of soak water of maize, but does not appear in the newspapers with the method for soak water of maize instead of corn slurry production L-glutamic acid.
Summary of the invention
At the deficiencies in the prior art, the purpose of this invention is to provide a kind of soak water of maize and be used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, so that save energy and water reduce contaminated wastewater and waste water control expense.The present invention suitably adjusts the fermented liquid proportioning raw materials by technological innovation, directly with the soak water of maize utilization, as fermentation raw material, replaces original corn steep liquor and water of part that uses, to reach the purpose of saving water and energy.
Technical scheme of the present invention is as follows: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, its novelty is, replace the corn steep liquor in the vitamin H suboptimal dose zymotechnique to prepare fermention medium, fermentative production L-glutamic acid with soak water of maize.
Foregoing method, preferred scheme is that the proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 130～150g/L; Soak water of maize: 100～150ml/L; Molasses: 1.5-2.5g/L; Sodium phosphate dibasic: 1.6-1.8g/L; Repone K: 1-1.3g/L; Sal epsom: 0.3-0.5g/L; Defoamer: 0.02-0.04g/L.
More preferably, the proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 130～150g/L; Soak water of maize: 100～150ml/L; Molasses: 2g/L; Sodium phosphate dibasic: 1.7g/L; Repone K: 1.2g/L; Sal epsom: 0.4g/L; Defoamer: 0.03g/L.
Foregoing method, preferred scheme is that described defoamer is polyoxyethylene polyoxy propyl alcohol amidogen ether.
Foregoing method, preferred scheme is that described molasses are cane molasses.
Foregoing method, preferred scheme is described fermention medium pH:7.2～7.3.
Foregoing method, preferred scheme is described corn soaking water consumption: 120-130ml/L.More preferably, described corn soaking water consumption: 125ml/L.
Foregoing method, preferred scheme is to comprise that step is as follows:
(1) precipitation: fresh soak water of maize precipitates 24 hours in storage tank;
(2) except throw out: open the storage tank bottom valve, sediment exclusion by cup what of judgement discharging feed liquid that look before the bottom valve, discharges complete when looking the no floss of handleless cup;
(3) carry: will prepare burden standby in the storage tank in post to fermentation with pump delivery except the soak water of maize of precipitation;
(4) batching: according to proportioning that various raw material weighing are good, dissolving is made into fermention medium fully;
(5) sterilization: with the fermention medium sterilization for preparing, the sterilization method that the company of employing disappears, temperature 125-130 ℃, to hold time 5-7 minute, the substratum of Lian Xiaohao is cooled to 33 ℃ and waits for inoculation in fermentor tank;
(6) inoculation fermentation.
The present invention prepares burden with soak water of maize instead of corn slurry, not only can save a water of batching usefulness, also saves the energy that the further evaporation concentration of soak water of maize consumes greatly.What the invention provides a kind of soak water of maize efficiently utilizes approach, has solved to utilize soak water of maize to produce environmental pollution and energy consumption problem that corn steep liquor (powder) causes.
The present invention utilizes soak water of maize to carry out L-glutamic acid vitamin H suboptimal dose zymotechnique technology to belong to the utilization of waste material new technology.In L-glutamic acid vitamin H suboptimal dose zymotechnique fermenting process, corn steep liquor is its important starting material, corn steep liquor is that the immersion water that produces in the W-Gum production process obtains through evaporation concentration, with soak water of maize instead of corn slurry batching, ferment, L-glutamic acid produces sour index tangible reduction.Its technical process is as follows: desired raw material is prepared burden → disinfection inoculation → fermentation → extraction → L-glutamic acid in proportion.The present invention does not change original zymotechnique flow process, raw material substitution, and it is convenient to implement, and the economy of resources of utilization of waste material is remarkable.
Used soak water of maize refers to the prepared soak water of maize of the first step in corn comprehensive process wet production starch and the glucose process.Its preparation method is identical with the soak water of maize that the corn wet method prepares starch and Glucose Liquid, and its work flow is: and corn previous cleaning → silo → corn aftertreatment → add water in steeping tank with sulfurous acid soaks → sieves → and a minute water sieve screen underflow send step process configurations fermention medium down.Its dip operation processing condition are: corn: water: the weight consumption ratio of sulfurous acid is: 1: 0.6: 0.02; Soaking temperature: 49～53 ℃; Soak time: 54～72 hours.
The inventor is through the composition to soak water of maize, character, bioactive functions etc. carry out serious analysis, detect, think after the research, soak water of maize gathers contained organic nitrogen source and inorganics, trace element, compositions such as VITAMIN are basic identical with soybean meal hydrolysate on kind and function, whole nutritive ingredients of solubility in the corn grain have almost been comprised in the soak water of maize, add that the undissolved material of an original part is converted into soluble substance by the lactic acid hydrolysis in immersion process, contain several mineral materials (as: K in the corn soaking, P), multiple thing (the VA that supports one's family, VB, VH, inositol, carotene etc.), soluble proteins and degradation product thereof (peptide class, each seed amino acid), also contain lactic acid, phytic acid and soluble sugar, the nutritive substance kind is identical with corn steep liquor with micro-kind.Corn steep liquor in fermention medium substitutes with an amount of soak water of maize, and the VITAMIN in the substratum, trace element and amino acid remain unchanged, and can not influence fermentation and acid and glucose acid invert ratio.
Experiment showed, after deliberation in glutamic acid fermentation process, can replace the required corn steep liquor of using in the former known formulations with soak water of maize of the present invention, the fermentative production of L-glutamic acid is not had a negative impact.In known aminoglutaric acid fermentation production method, adopt vitamin H defective type rod bacillus, need corn steep liquor to make raw material in the substratum, all can select for use soak water of maize of the present invention to replace.
Embodiment
Describe technical scheme of the present invention in detail below in conjunction with embodiment, but protection domain is not limited thereto.
The present invention is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid with soak water of maize, is to replace the corn steep liquor in the vitamin H suboptimal dose zymotechnique to prepare fermention medium, fermentative production L-glutamic acid with soak water of maize.Adopt working method and the process control condition of the substratum fermentative production L-glutamic acid of soak water of maize instead of corn slurry of the present invention preparation, if it is do not add special instruction, all consistent with well-known operations method and the process control condition of the substratum fermentative production L-glutamic acid of using corn steep liquor.
Embodiment 1: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, comprises that specifically step is as follows:
(1) precipitation: fresh soak water of maize precipitates 24 hours in storage tank;
(2) except throw out: open the storage tank bottom valve, sediment exclusion by cup what of judgement discharging feed liquid that look before the bottom valve, discharges complete when looking the no floss of handleless cup;
(3) carry: will prepare burden standby in the storage tank in post to fermentation with pump delivery except the soak water of maize of precipitation;
(4) batching: according to proportioning that various raw material weighing are good, dissolving is made into fermention medium fully;
The proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 130g/L; Soak water of maize: 100ml/L; Cane molasses: 1.5g/L; Sodium phosphate dibasic: 1.6g/L; Repone K: 1g/L; Sal epsom: 0.3g/L; Defoamer (polyoxyethylene polyoxy propyl alcohol amidogen ether): 0.02g/L.Described fermention medium pH:7.2.
(5) sterilization: with the fermention medium sterilization for preparing, the sterilization method that the company of employing disappears, temperature 125-130 ℃, to hold time 5-7 minute, the substratum of Lian Xiaohao is cooled to 33 ℃ and waits for inoculation in fermentor tank;
(6) inoculation fermentation.
Embodiment 2: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, comprises that specifically step is as follows:
(1) precipitation: fresh soak water of maize precipitates 24 hours in storage tank;
(2) except throw out: open the storage tank bottom valve, sediment exclusion by cup what of judgement discharging feed liquid that look before the bottom valve, discharges complete when looking the no floss of handleless cup;
(3) carry: will prepare burden standby in the storage tank in post to fermentation with pump delivery except the soak water of maize of precipitation;
(4) batching: according to proportioning that various raw material weighing are good, dissolving is made into fermention medium fully;
The proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 150g/L; Soak water of maize: 150ml/L; Cane molasses: 2.5g/L; Sodium phosphate dibasic: 1.8g/L; Repone K: 1.3g/L; Sal epsom: 0.5g/L; Defoamer (polyoxyethylene polyoxy propyl alcohol amidogen ether): 0.04g/L.Described fermention medium pH:7.3.
(5) sterilization: with the fermention medium sterilization for preparing, the sterilization method that the company of employing disappears, temperature 125-130 ℃, to hold time 5-7 minute, the substratum of Lian Xiaohao is cooled to 33 ℃ and waits for inoculation in fermentor tank;
(6) inoculation fermentation (using vitamin H defective type rod bacillus).
Embodiment 3: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, comprises that specifically step is as follows:
(1) precipitation: fresh soak water of maize precipitates 24 hours in storage tank;
(2) except throw out: open the storage tank bottom valve, sediment exclusion by cup what of judgement discharging feed liquid that look before the bottom valve, discharges complete when looking the no floss of handleless cup;
(3) carry: will prepare burden standby in the storage tank in post to fermentation with pump delivery except the soak water of maize of precipitation;
(4) batching: according to proportioning that various raw material weighing are good, dissolving is made into fermention medium fully;
The proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 140g/L; Soak water of maize: 120ml/L; Cane molasses: 2g/L; Sodium phosphate dibasic: 1.7g/L; Repone K: 1.2g/L; Sal epsom: 0.4g/L; Defoamer (polyoxyethylene polyoxy propyl alcohol amidogen ether): 0.03g/L.Described fermention medium pH:7.2.
(5) sterilization: with the fermention medium sterilization for preparing, the sterilization method that the company of employing disappears, temperature 125-130 ℃, to hold time 5-7 minute, the substratum of Lian Xiaohao is cooled to 33 ℃ and waits for inoculation in fermentor tank;
(6) inoculation fermentation (using vitamin H defective type rod bacillus).
Embodiment 4: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, and step is identical with embodiment 3, and that different is described corn soaking water consumption: 130ml/L.
Embodiment 5: soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, and step is identical with embodiment 3, and different is described corn soaking water consumption: described corn soaking water consumption: 125ml/L.
Experimental example: according to the step of embodiment 3-5, at 75m
3Fermentor tank has carried out 10 batch fermentation production tests respectively continuously, other processing parameter unanimity, and result such as following table:
| Embodiment | Batch | Average period | Average-volume | Average product acid |
| 3 | 10 | 31.70 hour | 59.55m 3 | 11.78g/dl |
| 4 | 10 | 31.75 hour | 59.57m 3 | 11.75g/dl |
| 5 | 10 | 31.80 hour | 59.50m 3 | 11.80g/dl |
Quality product such as the following table of the L-L-glutamic acid of 5 first batches of fermentative production of embodiment:
| Sequence number | Index name | Standard | The inventive method |
| 1 | Content % (L-glutamic acid butt meter) | 95％ | 95.6％ |
| 2 | D20 ℃/HCL of specific rotation [a] solution | 31.3° | 30.7° |
| 3 | Transmittance % | 30 | 35 |
| 4 | SO 4 2-％ | 0.35 | 0.29 |
Adopt the substratum fermentative production L-glutamic acid of the method for the invention preparation as follows with the technical indicator contrast of adopting known substratum fermentative production L-glutamic acid:
| Index | The present invention | Known technology |
| Leavening temperature | 33-38℃ | 33-38℃ |
| Fermentation period | 30-34 hour | 30-34 hour |
| The bacterial classification amount | 8--12% (volume ratio) | 8--12% (volume ratio) |
| Produce acid | 11.75g/dl | 11.5g/dl |
| Glucose acid invert ratio | 61％ | 60％ |
By above mill trial results as can be seen, prepare burden with soak water of maize instead of corn slurry, every productive capacity of glutamic acid fermentation does not have tangible reduction, the fermentation costs of L-glutamic acid reduces about 50 yuan/kg, proves that it is popularized in an all-round way in the production of L-glutamic acid vitamin H suboptimal dose zymotechnique is feasible.This technology operation is convenient, saves water and energy, and is conducive to reduce the fermentation costs of L-glutamic acid, is suitable for popularizing in an all-round way aborning.The present invention prepares burden with soak water of maize instead of corn slurry, not only can save a water of batching usefulness, also saves the energy that the further evaporation concentration of soak water of maize consumes greatly.What the invention provides a kind of soak water of maize efficiently utilizes approach, has solved to utilize soak water of maize to produce environmental pollution and energy consumption problem that corn steep liquor (powder) causes, and it produces acid and glucose acid invert ratio also increases simultaneously.
Claims (6)
1. soak water of maize is used for the method that vitamin H suboptimal dose zymotechnique is produced L-glutamic acid, it is characterized in that, replaces the corn steep liquor in the vitamin H suboptimal dose zymotechnique to prepare fermention medium, fermentative production L-glutamic acid with soak water of maize;
Concrete steps are as follows:
(1) precipitation: fresh soak water of maize precipitates 24 hours in storage tank;
(2) except throw out: open the storage tank bottom valve, sediment exclusion by cup what of judgement discharging feed liquid that look before the bottom valve, discharges complete when looking the no floss of handleless cup;
(3) carry: will prepare burden standby in the storage tank in post to fermentation with pump delivery except the soak water of maize of precipitation;
(4) batching: according to proportioning that various raw material weighing are good, dissolving is made into fermention medium fully;
(5) sterilization: with the fermention medium sterilization for preparing, the sterilization method that the company of employing disappears, temperature 125-130 ℃, to hold time 5-7 minute, the substratum of Lian Xiaohao is cooled to 33 ℃ and waits for inoculation in fermentor tank;
(6) inoculation fermentation;
The proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 130～150g/L; Soak water of maize: 100～150ml/L; Molasses: 1.5-2.5g/L; Sodium phosphate dibasic: 1.6-1.8g/L; Repone K: 1-1.3g/L; Sal epsom: 0.3-0.5g/L; Defoamer: 0.02-0.04g/L; Described defoamer is polyoxyethylene polyoxy propyl alcohol amidogen ether.
2. method according to claim 1 is characterized in that, the proportioning raw materials of described fermention medium is as follows: amylum hydrolysate of the sugar: 130～150g/L; Soak water of maize: 100～150ml/L; Molasses: 2g/L; Sodium phosphate dibasic: 1.7g/L; Repone K: 1.2g/L; Sal epsom: 0.4g/L; Defoamer: 0.03g/L.
3. method according to claim 1 and 2 is characterized in that, described molasses are cane molasses.
4. method according to claim 1 and 2 is characterized in that, described fermention medium pH:7.2～7.3.
5. method according to claim 1 and 2 is characterized in that, described soak water of maize: 120-130ml/L.
6. method according to claim 5 is characterized in that, described soak water of maize: 125ml/L.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402979A (en) * | 2008-11-07 | 2009-04-08 | 天津科技大学 | High-efficiency method for fermentation production of L-glutamic acid |
| CN101440386A (en) * | 2008-12-30 | 2009-05-27 | 宁夏伊品生物工程股份有限公司 | Production method of aminoglutaric acid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402979A (en) * | 2008-11-07 | 2009-04-08 | 天津科技大学 | High-efficiency method for fermentation production of L-glutamic acid |
| CN101440386A (en) * | 2008-12-30 | 2009-05-27 | 宁夏伊品生物工程股份有限公司 | Production method of aminoglutaric acid |
Non-Patent Citations (2)
| Title |
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| 谷氨酸发酵过程的控制;马占龙;《发酵科技通讯》;20060731;第35卷(第3期);第1-2页 * |
| 马占龙.谷氨酸发酵过程的控制.《发酵科技通讯》.2006,第35卷(第3期),第1-2页. |
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