CN115399466A - 谷氨酸钠的浓缩结晶工艺 - Google Patents
谷氨酸钠的浓缩结晶工艺 Download PDFInfo
- Publication number
- CN115399466A CN115399466A CN202210752520.2A CN202210752520A CN115399466A CN 115399466 A CN115399466 A CN 115399466A CN 202210752520 A CN202210752520 A CN 202210752520A CN 115399466 A CN115399466 A CN 115399466A
- Authority
- CN
- China
- Prior art keywords
- fermentation
- carried out
- glutamic acid
- crystals
- collecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 235000013923 monosodium glutamate Nutrition 0.000 title claims abstract description 18
- 229940073490 sodium glutamate Drugs 0.000 title claims abstract description 14
- 238000002425 crystallisation Methods 0.000 title claims abstract description 11
- 230000008025 crystallization Effects 0.000 title claims abstract description 11
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 title claims 2
- 238000000855 fermentation Methods 0.000 claims abstract description 45
- 230000004151 fermentation Effects 0.000 claims abstract description 45
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 235000013922 glutamic acid Nutrition 0.000 claims abstract description 23
- 239000004220 glutamic acid Substances 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 238000004042 decolorization Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 8
- 238000005119 centrifugation Methods 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 21
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 18
- 241000186226 Corynebacterium glutamicum Species 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000000706 filtrate Substances 0.000 claims description 11
- 235000015097 nutrients Nutrition 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 9
- 240000008042 Zea mays Species 0.000 claims description 8
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 8
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 230000001580 bacterial effect Effects 0.000 claims description 8
- 235000005822 corn Nutrition 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000001888 Peptone Substances 0.000 claims description 7
- 108010080698 Peptones Proteins 0.000 claims description 7
- 235000019319 peptone Nutrition 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 244000068988 Glycine max Species 0.000 claims description 6
- 235000010469 Glycine max Nutrition 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 4
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 claims description 4
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 claims description 4
- 239000004473 Threonine Substances 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 239000008103 glucose Substances 0.000 claims description 4
- 229930182817 methionine Natural products 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 3
- 229960003237 betaine Drugs 0.000 claims description 3
- 229940041514 candida albicans extract Drugs 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000012138 yeast extract Substances 0.000 claims description 3
- 238000011081 inoculation Methods 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000004223 monosodium glutamate Substances 0.000 abstract description 4
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 20
- 229960002989 glutamic acid Drugs 0.000 description 18
- 230000000694 effects Effects 0.000 description 13
- 239000002609 medium Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 8
- 238000005286 illumination Methods 0.000 description 8
- 238000011218 seed culture Methods 0.000 description 5
- 101100134722 Arabidopsis thaliana O3L5 gene Proteins 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001963 growth medium Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000035755 proliferation Effects 0.000 description 3
- 235000018102 proteins Nutrition 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 241001052560 Thallis Species 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 230000004792 oxidative damage Effects 0.000 description 2
- 230000036542 oxidative stress Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 229940024606 amino acid Drugs 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 210000004211 gastric acid Anatomy 0.000 description 1
- 229940049906 glutamate Drugs 0.000 description 1
- 229930195712 glutamate Natural products 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/20—Synthetic spices, flavouring agents or condiments
- A23L27/21—Synthetic spices, flavouring agents or condiments containing amino acids
- A23L27/22—Synthetic spices, flavouring agents or condiments containing amino acids containing glutamic acids
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/20—Synthetic spices, flavouring agents or condiments
- A23L27/24—Synthetic spices, flavouring agents or condiments prepared by fermentation
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/27—Removal of unwanted matter, e.g. deodorisation or detoxification by chemical treatment, by adsorption or by absorption
- A23L5/273—Removal of unwanted matter, e.g. deodorisation or detoxification by chemical treatment, by adsorption or by absorption using adsorption or absorption agents, resins, synthetic polymers, or ion exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/02—Crystallisation from solutions
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/38—Chemical stimulation of growth or activity by addition of chemical compounds which are not essential growth factors; Stimulation of growth by removal of a chemical compound
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N13/00—Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/04—Alpha- or beta- amino acids
- C12P13/14—Glutamic acid; Glutamine
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/265—Micrococcus
- C12R2001/28—Micrococcus glutamicus ; Corynebacterium glutamicum
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Nutrition Science (AREA)
- Polymers & Plastics (AREA)
- Food Science & Technology (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Medicinal Chemistry (AREA)
- Tropical Medicine & Parasitology (AREA)
- Virology (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
本发明属于味精生产技术领域,公开了谷氨酸钠的浓缩结晶工艺,其包括如下步骤:步骤1)发酵制备谷氨酸,步骤2)离心、过滤,步骤3)浓缩等电,步骤4)中和、脱色,步骤5)树脂脱色,步骤6)烘干、分筛。
Description
技术领域
本发明属于味精生产技术领域,具体涉及谷氨酸钠的浓缩结晶工艺。
背景技术
谷氨酸钠(Monosodium Glutamate),又名味精,具有较高的营养价值,食用后,经胃酸作用后转化为谷氨酸,被消化吸收构成蛋白质,并参与体内其它代谢过程。谷氨酸是自然界存在的20种氨基酸之一,参与各种生理必须的蛋白质的合成,是组成蛋白质的基本结构。由于谷氨酸钠的诸多功效,所以人们对其需求量越来越大。虽然我国谷氨酸钠行业发展较快,其生产企业向规模化、集约型发展,生产水平不断提高,现已基本达到国际先进水平。但也存在着设备利用率低、能耗高等问题。
发明内容
本发明所要解决的技术问题在于提供一种谷氨酸钠的生产工艺,其包括提高谷氨酸的发酵水平以及谷氨酸钠的浓缩结晶工艺的优化,旨在提高发酵产量的同时,提升谷氨酸钠品质。
本发明是通过如下技术方案来实现的。
谷氨酸钠的浓缩结晶工艺,其包括如下步骤:步骤1)发酵制备谷氨酸,步骤2) 离心、过滤,步骤3)浓缩等电,步骤4)中和、脱色,步骤5)树脂脱色,步骤6)烘干、分筛。
进一步地,
所述步骤1)发酵制备谷氨酸:将谷氨酸棒杆菌种子液按照10%的接种量接入到含有发酵培养基的发酵罐中进行发酵培养,当菌体OD600达到15时,开始流加全营养培养基,流加至发酵培养结束前4h停止。
进一步地,
所述步骤2)离心、过滤:步骤1)制得的谷氨酸发酵液经碟片离心机离心,收集上层液体,经过陶瓷膜过滤,收集滤液。
进一步地,
所述步骤3)浓缩等电:将步骤2)所得滤液浓缩三倍,然后缓慢降温至20℃,调节成pH为3.22的等电溶液,沉降6小时,离心,收集粗晶体,再投入到投入纯化水中,直至完全溶解,浓缩三倍,再调节成pH为3.22的等电溶液;温度控制在15℃,沉降6小时,收集谷氨酸湿晶体。
进一步地,
所述步骤4)中和、脱色:往步骤3)所得谷氨酸湿晶体中添加纯碱,然后添加水,边搅拌边加热至65℃,直至全部溶解;然后转移到脱色罐中,并加粉末活性炭,65℃保温搅拌脱色30min;脱色完成后泵入板框中,过滤拦截活性炭,收集板框滤液。
进一步地,
所述步骤5)树脂脱色:将步骤4)所得板框滤液泵入树脂柱,收集经树脂脱色后的中和液,再泵入到结晶罐中浓缩结晶,结晶罐内温度控制在71℃,真空度 -0.073;浓缩结束的料液用平板离心机分离出晶体。
进一步地,
所述步骤6)烘干、分筛:将步骤6)所得晶体用振动流化床烘干,烘干后的固体粉末状晶体使用分筛机进行分筛,去除粒径<1mm的小规格异物。
优选地,所述发酵培养基为:葡萄糖60g/L,玉米浆30g/L,酵母膏5g/L,大豆蛋白胨10g/L,KH2PO42.5 g/L,MgSO4·7H2O1.2 g/L,KCL1 g/L,MnSO410 mg/L, FeSO410 mg/L,苏氨酸1g/L,甜菜碱1g/L,VH3 mg/L,VB10.5 mg/L。
优选地,所述全营养培养基为:玉米浆干粉30g/L,大豆蛋白胨10g/L,KH2PO42.5 g/L,MgSO4·7H2O1.2 g/L,KCL1 g/L,MnSO410 mg/L,FeSO410 mg/L,甲硫氨酸 0.5g/L,VH3 mg/L,VB10.5 mg/L,2-氨基乙醇1mg/L。
优选地,所述发酵培养条件为:发酵初始温度为32℃,当发酵液中菌体量OD600达到28时,将温度在30min内升至37.5℃,1h后升温至38℃;通过控制转速和通风将溶氧控制在30%;通过氨水控制pH在7.0左右;整个发酵培养过程采用100lux蓝光照射培养的方式,发酵总时间为60h。
与现有技术相比,本发明取得的有益效果主要包括但是并不限于以下几个方面:
适量的2-氨基乙醇的添加可以促进谷氨酸棒杆菌细胞壁的合成效率,进而维持谷氨酸棒杆菌的增殖活力,使得谷氨酸棒杆菌处于稳定平衡的菌体密度。一定强度的蓝光光照能够提高谷氨酸棒杆菌的菌体密度,可能原因是蓝光光照提高了谷氨酸棒杆菌中相关抗氧化酶的酶活力,进而提升活性氧的水平,促进谷氨酸棒杆菌的分裂增殖,并且使得菌体活力维持在较高的水平,从而提高了谷氨酸的发酵效率。但是过大强度的光照会使得菌体产生过量活性氧,进而会给菌体带来氧化压力,导致氧化损伤,甚至影响其活性。本研究发现,蓝光不但能够提高密度,还能够提高单位菌体的产酸量。
本发明分离纯化工艺采用浓缩等电技术,硫酸的消耗最低,降低了成本,提高了工业附加值;采用活性炭和树脂配合的方式来脱色谷氨酸钠,降低了树脂的用量,而且结合分筛机分筛去除小颗粒杂质,提高了产品的纯度。
具体实施方式
为了使本技术领域的人员更好地理解本申请中的技术方案,下面将结合本申请具体实施例,对本申请的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。
实施例1
本发明是在“CN112695061A一种L-谷氨酸全营养流加高密度发酵的方法”的基础上继续研究的技术成果。
提高谷氨酸发酵菌体量和产酸效率的方法,其包括如下步骤:
(1)菌体活化:将保藏在-80℃冰箱中的谷氨酸棒杆菌(保藏编号 CGMCCNo.5481)接种到斜面上传代活化,传代两次。
所述斜面培养基为蛋白胨5g/L,牛肉膏10g/L,酵母粉4g/L,玉米浆干粉25g/L,KH2PO41 g/L,MgSO40.2 g/L,NaCl1 g/L,琼脂粉25g/L,甲硫氨酸 0.2g/L,pH=6.8;
(2)种子培养:将活化好的菌株用无菌水洗脱,洗脱后全部接种到配置好的种子发酵液中进行种子培养。
所述的种子培养基为:葡萄糖40g/L,玉米浆干粉10g/L,KH2PO4 2g/L,MgSO4·7H2O0.8g/L,MnSO4 5mg/L,FeSO4 5mg/L,苏氨酸1g/L,VH10 mg/L。
所述种子培养条件为:温度维持在32℃左右,溶氧控制在20%,pH通过氨水控制在7.0左右。
(3)发酵培养:当种子培养基中的菌体量(OD600)达到40时,按10%的接种量接种到含有280L发酵培养基的1000L发酵罐中,当菌体OD600达到15时,开始流加420L全营养培养基,流加至发酵结束前4h停止。
所述的发酵培养基为葡萄糖60g/L,玉米浆30g/L,酵母膏5g/L,大豆蛋白胨10g/L,KH2PO42.5 g/L,MgSO4·7H2O1.2 g/L,KCL1 g/L,MnSO410 mg/L, FeSO410 mg/L,苏氨酸1g/L,甜菜碱1g/L,VH3 mg/L,VB10.5 mg/L。
所述的全营养培养基为:玉米浆干粉30g/L,大豆蛋白胨10g/L,KH2PO42.5 g/L,MgSO4·7H2O1.2 g/L,KCL1 g/L,MnSO410 mg/L,FeSO410 mg/L,甲硫氨酸 0.5g/L,VH3 mg/L,VB10.5 mg/L,2-氨基乙醇1mg/L。
所述的发酵条件为:发酵初始温度为32℃,当发酵液中菌体量(OD600)达到 28时,将温度在30min内升至37.5℃,1h后升温至38℃;通过控制转速和通风将溶氧控制在30%;通过氨水控制pH在7.0左右;整个发酵过程采用100lux 蓝光照射培养的方式,发酵总时间为60h。
实施例2
同实施例1,不同之处仅在于全营养培养基中不添加2-氨基乙醇,采用暗培养的方式。
实施例3
同实施例1,不同之处仅在于采用暗培养的方式。
实施例4
在实施例2的基础上,验证2-氨基乙醇对菌体量和产酸效率的影响。具体见表1:
表1
如上表1所示,2-氨基乙醇对菌体量有一定的正向调控作用,从而能够在一定幅度上提高谷氨酸的产量,但是产酸效率并未明显改变,可能原因是,2-氨基乙醇能够促进谷氨酸棒杆菌细胞壁的合成效率,进而维持谷氨酸棒杆菌的增殖活力,使得谷氨酸棒杆菌处于稳定平衡的菌体密度,2-氨基乙醇是通过提升菌体密度来提高谷氨酸产量。
实施例5
验证不同光照条件对菌体密度和产酸效率的影响。
发酵工艺均采用实施例1,同批次发酵,具备可比较性,不同之处在于光照条件不同。
具体见表2:
表2
如上表2所示,蓝光能够提高菌体密度和谷氨酸产量,50-100lux的强度蓝光光照效果最好,不但能够提高密度,还能够提高单位菌体的产酸量,产酸效率也有大幅提高。可能原因是蓝光光照提高了谷氨酸棒杆菌中相关抗氧化酶的酶活力,进而提升活性氧的水平,促进谷氨酸棒杆菌的分裂增殖,并且使得菌体活力维持在较高的水平,从而提高了谷氨酸的发酵效率。但是过大强度的光照会使得菌体产生过量活性氧,进而会给菌体带来氧化压力,导致氧化损伤,甚至影响其活性。本研究还发现,红光也对菌体密度有一定的正向促进作用,但是调节效果较蓝光弱,而对单位菌体的产酸量(产酸/菌体比例)没有任何影响;白光、绿光和黄光对菌体密度和产酸效率均没有明显影响。
实施例6
谷氨酸钠的浓缩结晶工艺,其包括如下步骤:
实施例1制备的谷氨酸发酵液经碟片离心机以5000rpm离心4min,收集菌体蛋白和上层液体;
上层液体经过陶瓷膜(截留分子量为5000Da)过滤,收集滤液,浓缩三倍,然后缓慢降温至20℃,调节成pH为3.22的等电溶液,沉降6小时,离心,收集粗晶体,在投入到投入纯化水中,直至完全溶解,再浓缩三倍,再调节成pH为 3.22的等电溶液;温度控制在15℃,沉降6小时,收集谷氨酸湿晶体;
往谷氨酸湿晶体中添加占谷氨酸湿晶体一半重量的纯碱,然后添加水,边搅拌边加热至65℃,直至全部溶解;然后转移到脱色罐中,并加0.5%(w/v)粉末活性炭,65℃保温搅拌脱色30min;脱色完成后泵入板框中,过滤拦截活性炭,收集板框滤液;
将板框滤液泵入树脂柱(大孔弱碱阴离子树脂装量1m3),进料流量2m3/h,收集经树脂脱色后中和液;经树脂脱色后的中和液泵入到结晶罐中浓缩结晶,结晶罐内温度控制在71℃,真空度-0.073;浓缩结束的料液用平板离心机分离;分离的晶体用振动流化床烘干,进风温度75℃,烘干后的固体粉末状晶体使用分筛机进行分筛,去除粒径<1mm的小规格异物;得到的产品颗粒均匀透亮,纯度达到99%以上。
以上列举的仅是本发明的最佳具体实施例。显然,本发明不限于以上实施例,还可以有许多变形。本领域的普通技术人员能从本发明公开的内容直接导出或联想到的所有变形,均应认为是本发明的保护范围。
Claims (10)
1.谷氨酸钠的浓缩结晶工艺,其包括如下步骤:步骤1)发酵制备谷氨酸,步骤2)离心、过滤,步骤3)浓缩等电,步骤4)中和、脱色,步骤5)树脂脱色,步骤6)烘干、分筛。
2.根据权利要求1所述的工艺,其特征在于,所述步骤1)发酵制备谷氨酸:将谷氨酸棒杆菌种子液按照10%的接种量接入到含有发酵培养基的发酵罐中进行发酵培养,当菌体OD600达到15时,开始流加全营养培养基,流加至发酵培养结束前4h停止。
3.根据权利要求2所述的工艺,其特征在于,所述步骤2)离心、过滤:步骤1)制得的谷氨酸发酵液经碟片离心机离心,收集上层液体,经过陶瓷膜过滤,收集滤液。
4.根据权利要求3所述的工艺,其特征在于,所述步骤3)浓缩等电:将步骤2)所得滤液浓缩三倍,然后缓慢降温至20℃,调节成pH为3.22的等电溶液,沉降6小时,离心,收集粗晶体,再投入到投入纯化水中,直至完全溶解,浓缩三倍,再调节成pH为3.22的等电溶液;温度控制在15℃,沉降6小时,收集谷氨酸湿晶体。
5.根据权利要求4所述的工艺,其特征在于,所述步骤4)中和、脱色:往步骤3)所得谷氨酸湿晶体中添加纯碱,然后添加水,边搅拌边加热至65℃,直至全部溶解;然后转移到脱色罐中,并加粉末活性炭,65℃保温搅拌脱色30min;脱色完成后泵入板框中,过滤拦截活性炭,收集板框滤液。
6.根据权利要求5所述的工艺,其特征在于,所述步骤5)树脂脱色:将步骤4)所得板框滤液泵入树脂柱,收集经树脂脱色后的中和液,再泵入到结晶罐中浓缩结晶,结晶罐内温度控制在71℃,真空度-0.073;浓缩结束的料液用平板离心机分离出晶体。
7.根据权利要求6所述的工艺,其特征在于,所述步骤6)烘干、分筛:将步骤6)所得晶体用振动流化床烘干,烘干后的固体粉末状晶体使用分筛机进行分筛,去除粒径<1mm的小规格异物。
8.根据权利要求2所述的工艺,其特征在于,所述发酵培养基为:葡萄糖60g/L,玉米浆30g/L,酵母膏5g/L,大豆蛋白胨10g/L,KH2PO42.5g/L,MgSO4·7H2O1.2g/L,KCL1g/L,MnSO410mg/L,FeSO410mg/L,苏氨酸1g/L,甜菜碱1g/L,VH3mg/L,VB10.5mg/L。
9.根据权利要求2所述的工艺,其特征在于,所述全营养培养基为:玉米浆干粉30g/L,大豆蛋白胨10g/L,KH2PO42.5g/L,MgSO4·7H2O1.2g/L,KCL1g/L,MnSO410mg/L,FeSO410mg/L,甲硫氨酸0.5g/L,VH3mg/L,VB10.5mg/L,2-氨基乙醇1mg/L。
10.根据权利要求2所述的工艺,其特征在于,所述发酵培养条件为:发酵初始温度为32℃,当发酵液中菌体量OD600达到28时,将温度在30min内升至37.5℃,1h后升温至38℃;通过控制转速和通风将溶氧控制在30%;通过氨水控制pH在7.0左右;整个发酵培养过程采用100lux蓝光照射培养的方式,发酵总时间为60h。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210752520.2A CN115399466B (zh) | 2022-06-29 | 2022-06-29 | 谷氨酸钠的浓缩结晶工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210752520.2A CN115399466B (zh) | 2022-06-29 | 2022-06-29 | 谷氨酸钠的浓缩结晶工艺 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN115399466A true CN115399466A (zh) | 2022-11-29 |
CN115399466B CN115399466B (zh) | 2024-02-06 |
Family
ID=84157498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210752520.2A Active CN115399466B (zh) | 2022-06-29 | 2022-06-29 | 谷氨酸钠的浓缩结晶工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115399466B (zh) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1412706A (fr) * | 1963-10-26 | 1965-10-01 | Kyowa Hakko Kogyo Kk | Procédé de récupération de l'acide glutamique |
CN102372645A (zh) * | 2010-08-10 | 2012-03-14 | 梅花生物科技集团股份有限公司 | 一种谷氨酸发酵提取工艺 |
CN102703537A (zh) * | 2012-06-26 | 2012-10-03 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种新的谷氨酸生产方法 |
WO2014072934A1 (fr) * | 2012-11-07 | 2014-05-15 | Girinsky Olivier | Utilisation de lumiere bleue pour la stimulation du metabolisme de microorganismes non phototrophes |
CN105646256A (zh) * | 2016-03-20 | 2016-06-08 | 内蒙古阜丰生物科技有限公司 | 一种谷氨酸提取结晶工艺 |
CN110904168A (zh) * | 2019-12-03 | 2020-03-24 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种提高谷氨酸发酵转化率的方法 |
CN112695061A (zh) * | 2020-11-04 | 2021-04-23 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种l-谷氨酸全营养流加高密度发酵的方法 |
CN112708645A (zh) * | 2020-11-04 | 2021-04-27 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种高效生产味精的方法 |
CN113373185A (zh) * | 2021-06-29 | 2021-09-10 | 河南工业大学 | 一种使用谷氨酸棒杆菌生产谷氨酸的方法 |
CN114287603A (zh) * | 2021-12-30 | 2022-04-08 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种提高味精产品色度的方法 |
-
2022
- 2022-06-29 CN CN202210752520.2A patent/CN115399466B/zh active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1412706A (fr) * | 1963-10-26 | 1965-10-01 | Kyowa Hakko Kogyo Kk | Procédé de récupération de l'acide glutamique |
CN102372645A (zh) * | 2010-08-10 | 2012-03-14 | 梅花生物科技集团股份有限公司 | 一种谷氨酸发酵提取工艺 |
CN102703537A (zh) * | 2012-06-26 | 2012-10-03 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种新的谷氨酸生产方法 |
WO2014072934A1 (fr) * | 2012-11-07 | 2014-05-15 | Girinsky Olivier | Utilisation de lumiere bleue pour la stimulation du metabolisme de microorganismes non phototrophes |
CN105646256A (zh) * | 2016-03-20 | 2016-06-08 | 内蒙古阜丰生物科技有限公司 | 一种谷氨酸提取结晶工艺 |
CN110904168A (zh) * | 2019-12-03 | 2020-03-24 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种提高谷氨酸发酵转化率的方法 |
CN112695061A (zh) * | 2020-11-04 | 2021-04-23 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种l-谷氨酸全营养流加高密度发酵的方法 |
CN112708645A (zh) * | 2020-11-04 | 2021-04-27 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种高效生产味精的方法 |
CN113373185A (zh) * | 2021-06-29 | 2021-09-10 | 河南工业大学 | 一种使用谷氨酸棒杆菌生产谷氨酸的方法 |
CN114287603A (zh) * | 2021-12-30 | 2022-04-08 | 呼伦贝尔东北阜丰生物科技有限公司 | 一种提高味精产品色度的方法 |
Also Published As
Publication number | Publication date |
---|---|
CN115399466B (zh) | 2024-02-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109504719B (zh) | 一种提高谷氨酸产酸率及提取率的方法 | |
CN109504720B (zh) | 谷氨酸的绿色生产工艺 | |
CN108841758B (zh) | 谷氨酸棒杆菌突变株及其在l-亮氨酸生产中的应用 | |
CN109628513B (zh) | 一种氨基酸发酵培养基及其制备方法 | |
CN108285913B (zh) | 一种制备提取l-谷氨酰胺的工艺 | |
CN103755586B (zh) | 一种l-谷氨酰胺的制备方法 | |
CN112778149A (zh) | 一种从发酵液中提取分离β-丙氨酸的方法 | |
CN1515678A (zh) | 纳他霉素的制备方法 | |
CN113321580B (zh) | 一种生产苹果酸的方法 | |
CN108285914B (zh) | 一种l-色氨酸的发酵工艺 | |
CN117143933B (zh) | 一种发酵生产色氨酸的方法 | |
CN109136299B (zh) | 一种制备、提取以及纯化苏氨酸的方法 | |
CN115399466B (zh) | 谷氨酸钠的浓缩结晶工艺 | |
CN113005161A (zh) | 一种聚唾液酸的制备方法及聚唾液酸制品 | |
CN111139273B (zh) | 一种制备、分离和提取l-色氨酸的方法 | |
CN117126898A (zh) | 一种通过生物技术制备缬氨酸的工艺 | |
CN108977482B (zh) | 一种硫酸多粘菌素b的制备方法 | |
CN109706195B (zh) | 颗粒型苏氨酸的生产工艺 | |
CN113528599B (zh) | 一种高效螯合型酵素肽的生产方法 | |
CN110373439B (zh) | 一种稳定快速生产ε-聚赖氨酸的方法 | |
CN110592154B (zh) | 一种生产和提取色氨酸的工艺 | |
CN113774104A (zh) | 一种利用硫酸软骨素废水制备蛋白胨及生物有机肥的方法 | |
CN112813115A (zh) | 一种高纯度l-精氨酸的生产工艺 | |
CN112553111A (zh) | 提高副干酪乳杆菌有机硒富集量的自动补硒方法 | |
CN112430634A (zh) | 一种发酵法制备l-色氨酸的工艺 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |