WO2018070478A1 - 糖化反応液、糖化酵素組成物、糖の製造方法及びエタノールの製造方法 - Google Patents
糖化反応液、糖化酵素組成物、糖の製造方法及びエタノールの製造方法 Download PDFInfo
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- WO2018070478A1 WO2018070478A1 PCT/JP2017/037014 JP2017037014W WO2018070478A1 WO 2018070478 A1 WO2018070478 A1 WO 2018070478A1 JP 2017037014 W JP2017037014 W JP 2017037014W WO 2018070478 A1 WO2018070478 A1 WO 2018070478A1
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- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- UYAAVKFHBMJOJZ-UHFFFAOYSA-N diimidazo[1,3-b:1',3'-e]pyrazine-5,10-dione Chemical compound O=C1C2=CN=CN2C(=O)C2=CN=CN12 UYAAVKFHBMJOJZ-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000000835 fiber Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229930182830 galactose Natural products 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- CTRCJSPDRXFNNN-UHFFFAOYSA-N heptane-1,2,7-triol Chemical compound OCCCCCC(O)CO CTRCJSPDRXFNNN-UHFFFAOYSA-N 0.000 description 1
- BDMNVTRRWFESKG-UHFFFAOYSA-N heptane-1,2-diol hexane-1,6-diol Chemical compound C(C(CCCCC)O)O.C(CCCCCO)O BDMNVTRRWFESKG-UHFFFAOYSA-N 0.000 description 1
- SXCBDZAEHILGLM-UHFFFAOYSA-N heptane-1,7-diol Chemical compound OCCCCCCCO SXCBDZAEHILGLM-UHFFFAOYSA-N 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- FHKSXSQHXQEMOK-UHFFFAOYSA-N hexane-1,2-diol Chemical compound CCCCC(O)CO FHKSXSQHXQEMOK-UHFFFAOYSA-N 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
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- 230000003100 immobilizing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- PJUIMOJAAPLTRJ-UHFFFAOYSA-N monothioglycerol Chemical compound OCC(O)CS PJUIMOJAAPLTRJ-UHFFFAOYSA-N 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- CUUVVDHSUIKLPH-UHFFFAOYSA-N nonane-1,2,9-triol Chemical compound OCCCCCCCC(O)CO CUUVVDHSUIKLPH-UHFFFAOYSA-N 0.000 description 1
- LJZULWUXNKDPCG-UHFFFAOYSA-N nonane-1,2-diol Chemical compound CCCCCCCC(O)CO LJZULWUXNKDPCG-UHFFFAOYSA-N 0.000 description 1
- GKCGJDQACNSNBB-UHFFFAOYSA-N octane-1,2,8-triol Chemical compound OCCCCCCC(O)CO GKCGJDQACNSNBB-UHFFFAOYSA-N 0.000 description 1
- AEIJTFQOBWATKX-UHFFFAOYSA-N octane-1,2-diol Chemical compound CCCCCCC(O)CO AEIJTFQOBWATKX-UHFFFAOYSA-N 0.000 description 1
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- WEAYWASEBDOLRG-UHFFFAOYSA-N pentane-1,2,5-triol Chemical compound OCCCC(O)CO WEAYWASEBDOLRG-UHFFFAOYSA-N 0.000 description 1
- WCVRQHFDJLLWFE-UHFFFAOYSA-N pentane-1,2-diol Chemical compound CCCC(O)CO WCVRQHFDJLLWFE-UHFFFAOYSA-N 0.000 description 1
- GTCCGKPBSJZVRZ-UHFFFAOYSA-N pentane-2,4-diol Chemical compound CC(O)CC(C)O GTCCGKPBSJZVRZ-UHFFFAOYSA-N 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000223 polyglycerol Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 229940116423 propylene glycol diacetate Drugs 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 238000002731 protein assay Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- NLXLAEXVIDQMFP-JBISRTOLSA-N tetradeuterioazanium;chloride Chemical compound [Cl-].[2H][N+]([2H])([2H])[2H] NLXLAEXVIDQMFP-JBISRTOLSA-N 0.000 description 1
- 229940071127 thioglycolate Drugs 0.000 description 1
- CWERGRDVMFNCDR-UHFFFAOYSA-M thioglycolate(1-) Chemical compound [O-]C(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-M 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
-
- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/24—Hydrolases (3) acting on glycosyl compounds (3.2)
- C12N9/2402—Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
- C12N9/2405—Glucanases
- C12N9/2434—Glucanases acting on beta-1,4-glucosidic bonds
- C12N9/2437—Cellulases (3.2.1.4; 3.2.1.74; 3.2.1.91; 3.2.1.150)
-
- 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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
-
- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/24—Hydrolases (3) acting on glycosyl compounds (3.2)
- C12N9/2402—Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
- C12N9/2405—Glucanases
- C12N9/2408—Glucanases acting on alpha -1,4-glucosidic bonds
- C12N9/2411—Amylases
-
- 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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/02—Monosaccharides
-
- 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
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
- C12P7/10—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate substrate containing cellulosic material
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K1/00—Glucose; Glucose-containing syrups
- C13K1/02—Glucose; Glucose-containing syrups obtained by saccharification of cellulosic materials
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Definitions
- the present invention relates to a saccharification reaction solution, a saccharifying enzyme composition, a method for producing sugar, and a method for producing ethanol.
- Such a method includes a hydrothermal treatment step of treating a raw material with pressurized hot water, a mechanical pulverization treatment step of mechanically pulverizing the hydrothermal treated product, and a saccharification treatment step of saccharifying the mechanically pulverized product with an enzyme. including.
- a method has a problem that the reaction rate when saccharifying with an enzyme is slow, and the concentration of the resulting saccharified solution is not sufficient.
- the present invention has been made in view of the above circumstances, and provides a saccharification reaction solution, a saccharification enzyme composition, a saccharide production method, and an ethanol production method capable of improving the saccharification reaction efficiency by an enzyme in a simple process.
- the purpose is to provide.
- a first aspect of the present invention that achieves the above object is a saccharification reaction solution for saccharifying at least one of cellulose and hemicellulose, wherein at least one of the cellulose and hemicellulose, a saccharifying enzyme, silica, or a silica-containing substance, At least one compound selected from the group consisting of a polyhydric alcohol compound represented by the following general formula (1) and a derivative thereof, and an acetylene glycol represented by the following general formula (2) and an alkylene oxide adduct thereof ( A) and a saccharification reaction liquid characterized by containing.
- a polyhydric alcohol compound represented by the following general formula (1) and a derivative thereof and an acetylene glycol represented by the following general formula (2) and an alkylene oxide adduct thereof ( A) and a saccharification reaction liquid characterized by containing.
- R 1 in General Formula (1) represents a linear alkyl group having 1 to 9 carbon atoms
- R 2 and R 3 each independently represents a hydrogen atom, a halogen atom, an acyl group, an acetyl group, an amide group, an amino group, Group, allyl group, aryl group, aldehyde group, linear or branched alkyl group having 1 to 6 carbon atoms, alkylene group having 1 to 6 carbon atoms, alkenyl group having 1 to 6 carbon atoms, carbon number 1 Represents an alkoxy group of 6 or less, carbamoyl group, carboxyl group, cyano group, sulfo group, sulfonyl group, tosyl group, nitro group, hydroxyl group, phenyl group, benzyl group, phosphoryl group or mercapto group, It may have a substituent.
- R 4 and R 5 are each independently a hydrogen atom, an acyl group, an acetyl group, an amide group, an allyl group, an aryl group, an aldehyde group, a linear or branched alkyl group having 1 to 6 carbon atoms, and 1 or more carbon atoms.
- the repeating unit n satisfies 1 or more and 500 or less. ]
- R 1 , R 2 , R 3 , and R 4 in General Formula (2) are each independently a saturated or unsaturated linear or branched alkyl group having 1 to 10 carbon atoms in the main chain. Or an alkenyl group, wherein the alkyl group or alkenyl group may further have a substituent.
- a 1 and A 2 are each independently a linear or branched alkylene oxide group having 2 to 4 carbon atoms in the main chain (provided that the oxygen atom at one end of the alkylene oxide group is bonded to a hydrogen atom, The carbon atom at one end is bonded to an oxygen atom), and the added mole numbers m and n of the alkylene oxide unit satisfy 0 to 50 in total. ]
- the second aspect of the present invention that achieves the above object is the saccharification reaction solution according to the first aspect, wherein the silica-containing substance is diatomaceous earth or silica sand.
- the mass ratio of the silica or the compound (A) in the silica or the silica-containing material (compound (A) / silica) is 0.0001 or more, 1 It exists in the saccharification reaction liquid of the 1st or 2nd aspect characterized by being the following. *
- the polyhydric alcohol compound is selected from the group consisting of dihydric alcohols, trihydric alcohols and tetrahydric alcohol monomers, dimers, trigomers and oligomers, and polyalkylene glycols.
- the saccharification reaction solution according to any one of the first to third aspects is characterized by containing at least one selected from the group consisting of *
- the fifth aspect of the present invention for achieving the above object is characterized in that the derivative of the polyhydric alcohol compound contains at least one selected from the group consisting of polyhydric alcohol ethers and polyalkylene glycol ethers.
- the saccharification reaction solution according to any one of the first to fourth aspects.
- a seventh aspect of the present invention that achieves the above object is a saccharifying enzyme composition that saccharifies at least one of cellulose and hemicellulose, and is represented by saccharifying enzyme, silica or silica-containing substance, and the following general formula (1): Containing at least one compound (A) selected from the group consisting of an acetylene glycol represented by the following general formula (2) and an alkylene oxide adduct thereof:
- the saccharifying enzyme composition is characterized in that a mass ratio (compound (A) / silica) of silica and the compound (A) in the silica-containing substance is 0.0001 or more and 1 or less.
- R 1 in General Formula (1) represents a linear alkyl group having 1 to 9 carbon atoms
- R 2 and R 3 each independently represents a hydrogen atom, a halogen atom, an acyl group, an acetyl group, an amide group, an amino group, Group, allyl group, aryl group, aldehyde group, linear or branched alkyl group having 1 to 6 carbon atoms, alkylene group having 1 to 6 carbon atoms, alkenyl group having 1 to 6 carbon atoms, carbon number 1 Represents an alkoxy group of 6 or less, carbamoyl group, carboxyl group, cyano group, sulfo group, sulfonyl group, tosyl group, nitro group, hydroxyl group, phenyl group, benzyl group, phosphoryl group or mercapto group, It may have a substituent.
- R 4 and R 5 are each independently a hydrogen atom, an acyl group, an acetyl group, an amide group, an allyl group, an aryl group, an aldehyde group, a linear or branched alkyl group having 1 to 6 carbon atoms, and 1 or more carbon atoms.
- the repeating unit n satisfies 1 or more and 500 or less. ]
- R 1 , R 2 , R 3 , and R 4 in General Formula (2) are each independently a saturated or unsaturated linear or branched alkyl group having 1 to 10 carbon atoms in the main chain. Or an alkenyl group, wherein the alkyl group or alkenyl group may further have a substituent.
- a 1 and A 2 are each independently a linear or branched alkylene oxide group having 2 to 4 carbon atoms in the main chain (provided that the oxygen atom at one end of the alkylene oxide group is bonded to a hydrogen atom, The carbon atom at one end is bonded to an oxygen atom), and the added mole numbers m and n of the alkylene oxide unit satisfy 0 to 50 in total. ]
- the eighth aspect of the present invention that achieves the above object is the saccharifying enzyme composition according to the seventh aspect, wherein the silica-containing substance is diatomaceous earth or silica sand.
- the polyhydric alcohol compound is selected from the group consisting of dihydric alcohols, trihydric alcohols and tetrahydric alcohol monomers, dimers, trigomers and oligomers, and polyalkylene glycols.
- the saccharifying enzyme composition according to the seventh or eighth aspect is characterized by containing at least one selected from the group consisting of
- a tenth aspect of the present invention that achieves the above object is characterized in that the derivative of the polyhydric alcohol compound contains at least one selected from the group consisting of polyhydric alcohol ethers and polyalkylene glycol ethers.
- the saccharifying enzyme composition according to any one of the seventh to ninth aspects.
- a twelfth aspect of the present invention that achieves the above object is a method for producing a saccharide by using a saccharification reaction solution for saccharifying at least one of cellulose and hemicellulose, wherein the saccharide is produced by at least one of the cellulose and the hemicellulose.
- a sugar production method is characterized in that a sugar is produced using a saccharification reaction solution containing at least one compound (A) selected from the group consisting of: *
- R 1 in General Formula (1) represents a linear alkyl group having 1 to 9 carbon atoms
- R 2 and R 3 each independently represents a hydrogen atom, a halogen atom, an acyl group, an acetyl group, an amide group, an amino group, Group, allyl group, aryl group, aldehyde group, linear or branched alkyl group having 1 to 6 carbon atoms, alkylene group having 1 to 6 carbon atoms, alkenyl group having 1 to 6 carbon atoms, carbon number 1 Represents an alkoxy group of 6 or less, carbamoyl group, carboxyl group, cyano group, sulfo group, sulfonyl group, tosyl group, nitro group, hydroxyl group, phenyl group, benzyl group, phosphoryl group or mercapto group, It may have a substituent.
- R 4 and R 5 are each independently a hydrogen atom, an acyl group, an acetyl group, an amide group, an allyl group, an aryl group, an aldehyde group, a linear or branched alkyl group having 1 to 6 carbon atoms, and 1 or more carbon atoms.
- the repeating unit n satisfies 1 or more and 500 or less. ]
- R 1 , R 2 , R 3 , and R 4 in General Formula (2) are each independently a saturated or unsaturated linear or branched alkyl group having 1 to 10 carbon atoms in the main chain. Or an alkenyl group, wherein the alkyl group or alkenyl group may further have a substituent.
- a 1 and A 2 are each independently a linear or branched alkylene oxide group having 2 to 4 carbon atoms in the main chain (provided that the oxygen atom at one end of the alkylene oxide group is bonded to a hydrogen atom, The carbon atom at one end is bonded to an oxygen atom), and the added mole numbers m and n of the alkylene oxide unit satisfy 0 to 50 in total. ]
- the thirteenth aspect of the present invention that achieves the above object is the sugar production method according to the twelfth aspect, wherein the silica-containing substance is diatomaceous earth or silica sand.
- the mass ratio of the silica or the compound (A) in the silica or the silica-containing substance (compound (A) / silica) is 0.0001 or more, 1
- the sugar production method according to the twelfth or thirteenth aspect is characterized by the following. *
- the polyhydric alcohol compound is selected from the group consisting of dihydric alcohols, trihydric alcohols and tetrahydric alcohol monomers, dimers, trigomers and oligomers, and polyalkylene glycols.
- the method for producing a saccharide according to any one of the twelfth to fourteenth aspects is characterized by containing at least one selected from the group consisting of: *
- the sixteenth aspect of the present invention for achieving the above object is characterized in that the derivative of the polyhydric alcohol compound contains at least one selected from the group consisting of polyhydric alcohol ethers and polyalkylene glycol ethers.
- the method for producing a sugar according to any one of the twelfth to fifteenth aspects.
- ethanol fermentation using a fermentation microorganism is performed using the sugar obtained by the production method according to any one of the twelfth aspect to the seventeenth aspect.
- the method for producing ethanol is performed using the sugar obtained by the production method according to any one of the twelfth aspect to the seventeenth aspect.
- the nineteenth aspect of the present invention that achieves the above object is the production of ethanol according to the eighteenth aspect, wherein a fermentation microorganism is added to the step of producing sugar, and the production of sugar and ethanol fermentation are simultaneously performed. Is in the way. *
- the twentieth aspect of the present invention that achieves the above object is the method for producing ethanol according to the eighteenth aspect or the nineteenth aspect, wherein the fermenting microorganism is yeast, mold, or bacteria.
- the fermenting microorganism may be one of the genus Saccharomyces, the genus Zymomonas, the genus Pichia, the genus Candida, the genus Zymobacter,
- the ethanol production method according to the twentieth aspect which is a microorganism belonging to the genus Corynebacterium, the genus Kluyveromyces, or the genus Escherichia.
- the ethanol fermentation according to any one of the eighteenth to twenty-first aspects is performed, wherein ethanol fermentation is performed at 15 ° C. or higher and 35 ° C. or lower. Is in the way.
- a saccharification reaction solution a saccharification enzyme composition, a saccharide production method and an ethanol production method capable of improving the saccharification reaction efficiency by an enzyme in a simple process.
- 6 is a graph showing measurement results of the effect of improving the saccharification reaction efficiency by adding tripropylene glycol in Examples 3, 7, and 8 and Comparative Examples 1 to 3, 6, and 10 to 14.
- 6 is a graph showing measurement results of the effect of improving the efficiency of saccharification reaction by the tripropylene glycol concentration in Examples 1 to 6 and Comparative Examples 1, 4 to 9, and 12.
- 6 is a graph showing the measurement results of the effect of improving the saccharification reaction efficiency by the addition of the polyhydric alcohol compounds of Examples 9 to 20 and Comparative Examples 1 and 12, derivatives of polyhydric alcohol compounds, or alkylene oxide adducts of acetylene glycol.
- 6 is a graph showing the measurement results of the effect of improving the saccharification reaction efficiency by the addition of PPG1000 in Example 21 and Comparative Examples 15-17.
- 6 is a graph showing the measurement results of the effect of improving the efficiency of saccharification reaction by adding PPG1000 in Examples 22 to 28 and Comparative Examples 18 to 26. Improvement effect of saccharification reaction efficiency by addition of ethylene oxide adduct of PPG1000 or 2,4,7,9-tetramethyl-5-decyne-4,7-diol of Examples 29, 30 and Comparative Examples 1,27-29 It is the graph which showed the measurement result.
- 6 is a graph showing measurement results of the effect of improving ethanol fermentation efficiency by PPG1000 in Example 31 and Comparative Examples 30 to 32.
- At least one of cellulose and hemicellulose is used as a raw material for producing a sugar such as glucose.
- Such cellulose or hemicellulose is contained, for example, in cellulosic biomass such as agricultural, forestry and fishery resources such as broad-leaved trees and conifers, or waste of the agricultural, forestry and fishery resources. More specifically, raw materials such as bagasse, rice straw, corn stover, oil palm empty fruit bunch, wood fiber, wood chip, veneer scrap, wood flour, pulp, waste paper, cotton, sea squirt, acetic acid bacteria, etc. . These raw materials are not particularly limited as long as they are derived from cellulosic biomass, and one kind may be used alone or two or more kinds may be mixed and used. *
- cellulose or hemicellulose contained in eucalyptus wood flour (broadleaf tree), cedar wood flour (coniferous tree), bagasse, rice straw, corn stover, oil palm empty fruit bunch, cotton and the like is preferable. In these cases, the reason is not clear, but it is easy to defibrate and sugar can be obtained in a relatively high yield. *
- cellulose refers to a polymer in which glucose is polymerized by ⁇ -1,4 glucoside bonds.
- Hemicellulose is a polymer obtained by polymerizing glucose, xylose, mannose, galactose and the like by a glucoside bond, and refers to a water-insoluble polysaccharide other than cellulose.
- cellulose may contain cellooligosaccharides, cellobiose and the like, which are partially decomposed products, and may be crystalline or non-crystalline. Further, it may be a carboxymethylated, aldehyded or esterified derivative.
- cellulose or hemicellulose is not particularly limited as long as it is derived from biomass, and may be derived from plants, fungi, bacteria, or the like. *
- Such cellulase means an enzyme that decomposes cellulose or hemicellulose into a sugar such as glucose.
- the microorganism that produces such a saccharifying enzyme is not particularly limited.
- Genus, irpex, phanerochaet, penicillium, schizophyllum, sporotrichum, tramet derma tramet examples include bacteria.
- bacteria such as Clostridium, Pseudomonas, Cellulomonas, Ruminococcus, Bacillus, and the like;
- Sulfolobus Examples include actinomycetes such as bacteria, Streptomyces, Thermoactinomyces, Thermomonospora, and the like.
- These saccharifying enzymes may be artificially modified.
- these saccharifying enzymes may be used individually by 1 type, or may mix and use 2 or more types. *
- saccharifying enzymes derived from the genus Aspergillus and saccharifying enzymes derived from the genus Trichoderma are particularly preferable. This is because these saccharifying enzymes are highly active against crystalline cellulose.
- the cellulase may be a series of enzymes.
- Such enzyme groups include endoglucanase (EC 3.2.1.74), cellobiohydrolase (EC 3.2.1.91), ⁇ -glucosidase (EC 23.2.4.1, EC 3.2). 1.21) and the like.
- the cellulases described above are generally those having optimal enzyme activity in the range of pH 3 to pH 6, but are called alkaline cellulases having optimal enzyme activity in the range of pH 6 to pH 10. May be.
- many of the above cellulases have optimal enzyme activity in the reaction temperature range of 25 ° C. or higher and 50 ° C. or lower, but have optimal enzyme activity in the range of 70 ° C. or higher and 100 ° C. or lower. What is called thermostable cellulase may be used. *
- silica, diatomaceous earth, or silica sand can be used as the silica or silica-containing substance.
- Silica-containing materials, diatomaceous earth and silica sand are natural products mainly composed of silica.
- Silica is a general term for compounds containing at least silicon dioxide, and generally a silanol group is present on a part of the surface.
- This silica may be spherical or non-spherical in particle shape, the particle structure may be solid or porous, the crystallinity may be amorphous or crystalline, and any state of powder, suspension or dispersion May be used.
- a part of the silica surface may be modified with another functional group other than the silanol group.
- a silica layer may be present by reacting the surface of a compound other than silica with a silane coupling agent, silicon alkoxide, or silicate ions.
- a silane coupling agent silicon alkoxide
- silicate ions silicon alkoxide
- application of colloidal silica, diatomaceous earth, and silica sand is particularly preferable.
- colloidal silica has an average primary particle size of 1 nm or more and 400 nm or less, preferably 5 nm or more and 350 nm or less, and is used by being present in a saccharification reaction solution.
- Colloidal silica is used as a dispersion liquid dispersed in a dispersion medium such as water, methanol, ethanol, acetone, methyl ethyl ketone, and ethylene glycol.
- the dispersion liquid is called a colloidal liquid, a sol, or the like.
- a dispersion medium may be selected as long as the enzyme activity is not inhibited, but application of a dispersion medium such as water or ethanol is preferred.
- colloidal silica As a method for producing colloidal silica, there are a water glass method using water glass as a raw material, an alkoxide method using metal alkoxide as a raw material, and a gas phase method using silicon chloride compound as a raw material. Although colloidal silica obtained by any manufacturing method may be used, application of colloidal silica obtained by the water glass method is preferred. *
- R 1 represents a linear alkyl group having 1 to 9 carbon atoms
- R 2 and R 3 are each independently a hydrogen atom, a halogen atom, an acyl group, an acetyl group, an amide.
- Group amino group, allyl group, aryl group, aldehyde group, linear or branched alkyl group having 1 to 6 carbon atoms, alkylene group having 1 to 6 carbon atoms, alkenyl group having 1 to 6 carbon atoms, Represents an alkoxy group having 1 to 6 carbon atoms, carbamoyl group, carboxyl group, cyano group, sulfo group, sulfonyl group, tosyl group, nitro group, hydroxyl group, phenyl group, benzyl group, phosphoryl group or mercapto group, The group may further have a substituent.
- R 4 and R 5 are each independently a hydrogen atom, an acyl group, an acetyl group, an amide group, an allyl group, an aryl group, an aldehyde group, a linear or branched alkyl group having 1 to 6 carbon atoms, and 1 or more carbon atoms.
- the repeating unit n satisfies 1 or more and 500 or less.
- the number of carbon atoms of the alkyl group for R 1 is preferably 1 or more and 6 or less, more preferably 1 or more and 4 or less.
- the number of carbon atoms of the alkyl group, alkylene group, alkenyl group and alkoxy group of R 2 and R 3 is preferably 1 or more and 4 or less, more preferably 1 or more and 3 or less.
- the number of carbon atoms of the alkyl group, alkylene group, and alkenyl group of R 4 and R 5 is preferably 1 or more and 4 or less, and more preferably 1 or more and 3 or less.
- the repeating unit n is preferably 1 or more and 300 or less, more preferably 1 or more and 100 or less.
- R 1 , R 2 , R 3 and R 4 in the following general formula (2) of the present invention are each independently a saturated or unsaturated linear or branched chain having 1 to 10 carbon atoms in the main chain.
- the alkyl group or alkenyl group in the formula (1) may have a substituent.
- a 1 and A 2 are each independently a linear or branched alkylene oxide group having 2 to 4 carbon atoms in the main chain (provided that the oxygen atom at one end of the alkylene oxide group is bonded to a hydrogen atom, The carbon atom at one end is bonded to an oxygen atom), and the added mole numbers m and n of the alkylene oxide unit satisfy 0 to 50 in total.
- the number of carbon atoms of the alkyl group or alkenyl group of R 1 , R 2 , R 3 , and R 4 is preferably 1 or more and 8 or less, and more preferably 1 or more and 6 or less.
- the number of carbon atoms of the alkylene oxide groups of A 1 and A 2 is 2 or 3 preferred.
- the added moles m and n of the alkylene oxide unit are preferably 0 or more and 40 or less in total, and more preferably 10 or more and 30 or less.
- ethylene glycol other name; 1,2-ethanediol
- diethylene glycol triethylene glycol
- tetraethylene glycol propylene Glycol (also known as 1,2-propanediol), dipropylene glycol, tripropylene glycol
- trimethylene glycol also known as 1,3-propanediol
- 1,2-butanediol 1,3-butanediol
- 1, 4-butanediol 2,3-butanediol
- 1,2-pentanediol 1,5-pentanediol
- 2,4-pentanediol hexylene glycol (also known as 2-methylpentane-2,4-diol) 1,2-hexanediol, 1,6-hexanediol 1,2-heptanediol, 1,7-heptaned
- Trivalent alcohol Trivalent alcohol
- pentaerythritol also known as 2,2-bis (hydroxymethyl) -1,3-propanediol
- ditrimethylolpropane also known as 2,2′-oxybis (methylene) bis (2-ethyl-1,3) -Propanediol)
- L-threitol also known as L-1,2,3,4-butanetetraol
- polyethylene glycol linear or branched polypropylene glycol, polybutylene glycol
- Polytetramethylene ether glycol polyoxyethylene polyoxypropylene glycol
- polyalkylene glycols such as polyoxyethylene polyoxypropylene polyoxyethylene glycol random copolymers, alternating copolymers and block copolymers
- polyoxyethylene glyceryl ether polyoxypropylene glyceryl ether
- polyoxyethylene polyoxy Propylene glyceryl ether polyoxyethylene polyoxypropylene trimethylo
- the monomer of the above-mentioned polyhydric alcohol, a dimer, a trigomer, etc. may be sufficient.
- ethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-butanediol, glycerol, pentaerythritol, polyethylene glycol, and polypropylene glycol are preferable.
- the derivative of the polyhydric alcohol compound represented by the general formula (1) is not particularly limited.
- the acetylene glycol compound represented by the general formula (2) is not particularly limited, and examples thereof include 2-butyne-1,4-diol, 2,5-dimethyl-3-hexyne-2,5-diol, 3, 6-dimethyl-4-octyne-3,6-diol, 2,3,6,7-tetramethyl-4-octyne-3,6-diol, 4,7-dimethyl-5-decyne-4,7-diol 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol, and the like. *
- the alkylene oxide adduct of the acetylene glycol compound of the general formula (2) is not particularly limited.
- acetylene glycol compound and its alkylene oxide adduct Commercially available products of the acetylene glycol compound and its alkylene oxide adduct include, for example, Surfynol series, Olphine series manufactured by Nissin Chemical Industry Co., Ltd., and acetylenol series manufactured by Kawaken Fine Chemical Co., Ltd. *
- the compounds (A) represented by the general formulas (1) and (2) may be used alone or in combination with a plurality of compounds. *
- the saccharification reaction solution of the present invention is a saccharification enzyme composition, a saccharification enzyme, silica or a silica-containing substance, and a polyhydric alcohol compound represented by the general formula (1) and a derivative thereof, using at least one of cellulose and hemicellulose as a raw material. And at least one compound (A) selected from the group consisting of an acetylene glycol represented by the general formula (2) and an alkylene oxide adduct thereof.
- silica or a silica-containing substance and the compound (A) in the saccharification reaction solution from the viewpoint of enjoying the effect of improving the saccharification reaction efficiency (also simply referred to as reaction efficiency). *
- the concentration of silica in the silica or the silica-containing substance is 0.001% by mass or more and 40% by mass or less, preferably 0.005% by mass or more and 10% by mass or less. If the concentration of silica or silica in the silica-containing material is lower than this range, the reaction efficiency is unfavorably lowered. On the other hand, if it is higher than this range, not only the dispersibility is deteriorated, but also economically unsuitable. *
- the mass ratio of saccharification enzyme to silica or silica in the silica-containing substance is 0.0002 or more and 300 or less, preferably 0.002 or more and 30 or less. . When the mass ratio of both is out of this range, the improvement in reaction efficiency is not significant.
- the concentration of the compound (A) is 0.00001% by mass or more and 10% by mass or less, preferably 0.0001% by mass or more and 1% by mass or less.
- concentration of the compound (A) is lower than this range, the reaction efficiency is lowered, which is not preferable.
- concentration is higher than this range, not only the dispersibility is deteriorated but also economically unsuitable.
- the mass ratio of the silica and the compound (A) in the silica or the silica-containing substance (compound (A) / silica) is 0.0001 or more and 1 or less, preferably 0.001 or more. 0.1 or less. When the mass ratio of both is out of this range, the improvement in reaction efficiency is not significant.
- the pH of the saccharification reaction solution is 3 or more and 11 or less, preferably 3 or more and 6 or less.
- silica or silica-containing material is aggregated and the reaction efficiency of the saccharifying enzyme is lowered.
- the pH is higher than 11, silica or the silica-containing material is easily dissolved.
- pH adjuster of a saccharification reaction solution mineral acids such as sulfuric acid, hydrochloric acid and nitric acid; carboxylic acids such as acetic acid and oxalic acid; hydroxy acids such as citric acid, tartaric acid and malic acid; hydroxide salts such as sodium hydroxide and potassium hydroxide; Ammonia, urea, etc. are mentioned. If it is a range which does not inhibit the effect of this invention, there will be no use restriction in particular in the kind and density
- the reaction temperature is preferably 5 ° C. or higher and 100 ° C. or lower, preferably 20 ° C. or higher and 55 ° C. or lower. It is preferable to set the reaction temperature according to the optimum temperature of the saccharifying enzyme. In general, if the reaction temperature is lower than 5 ° C, the efficiency of the saccharification reaction is remarkably reduced, and if it is higher than 100 ° C, the saccharifying enzyme may be inactivated, such being undesirable. *
- the raw material for saccharification reaction may be obtained by chemically destroying the structure of lignin, cellulose and hemicellulose by physical pulverization with a cutter mill or the like, and acid or alkali treatment.
- silica or silica-containing substance and compound (A) may be added to the reaction solution in which the saccharifying enzyme is dispersed, and the silica or silica-containing substance and compound (A) are dispersed.
- a saccharifying enzyme may be added to the reaction solution.
- Silica or silica-containing substance and compound (A) may be added simultaneously or separately, and the order of addition is not limited as long as the saccharification reaction efficiency does not decrease.
- the compound (A) may be added in a powder state or in a solution state.
- other additives such as a pH adjuster, can be added in arbitrary orders. *
- the saccharification reaction solution of the present invention is a saccharifying enzyme composition, saccharifying enzyme, silica, and a polyhydric alcohol compound represented by the general formula (1), using at least one of cellulose and hemicellulose as a raw material. It can be obtained by containing the derivative and at least one compound (A) selected from the group consisting of acetylene glycol represented by the general formula (2) and an alkylene oxide adduct thereof.
- the mechanism is not clear in this saccharification reaction solution, saccharification of cellulose or hemicellulose can be further promoted by using silica or a silica-containing substance and compound (A) in combination.
- the saccharification reaction solution of the present invention is excellent in cost because the amount of saccharifying enzyme used can be reduced by the combined use of silica or a silica-containing substance and the compound (A).
- ethanol by subjecting the sugar obtained in the present invention to ethanol fermentation by a fermentation microorganism that performs ethanol fermentation. After obtaining sugar, fermenting microorganisms that perform ethanol fermentation may be added, and ethanol fermentation may be performed to obtain ethanol, or fermentation microorganisms that perform ethanol fermentation may be added to the step of obtaining sugar using the saccharification reaction solution. Alternatively, ethanol may be obtained by simultaneously producing sugar and ethanol fermentation. *
- Examples of the fermenting microorganism of the present invention include yeast, mold and bacteria. Among these, yeast or bacteria is particularly preferable. Moreover, these fermentation microorganisms may be used individually by 1 type, or may be used in mixture of 2 or more types. Examples of fermenting microorganisms used include, for example, the genus Saccharomyces, the genus Zymomonas, the genus Pichia, the genus Candida, the genus Zymobacter, the genus Corynebacterium, Examples include microorganisms belonging to the genus Kiesyveromyces, the genus Escherichia, and the like. *
- the preferable fermentation temperature when performing ethanol fermentation is 15 ° C. or more and 35 ° C. or less, and more preferably 28 ° C. or more and 32 ° C. or less.
- the preferable fermentation temperature when performing ethanol fermentation is 15 ° C. or more and 35 ° C. or less, and more preferably 28 ° C. or more and 32 ° C. or less.
- the fermentation temperature is lower than 15 ° C, the activity of the fermentation microorganisms becomes inactive, and thus the efficiency of ethanol fermentation is remarkably reduced.
- it is higher than 35 ° C the fermentation microorganisms may die, which is not preferable. *
- the method for producing ethanol by a fermentation microorganism that performs ethanol fermentation of the present invention uses a combination of silica or a silica-containing substance and compound (A) to efficiently produce sugar by a saccharifying enzyme even at a preferable fermentation temperature when ethanol fermentation is performed. Therefore, ethanol fermentation using the resulting sugar can also be performed efficiently.
- the reaction temperature for obtaining sugar is higher than the fermentation temperature for obtaining ethanol, it is necessary to cool the reaction solution before the ethanol fermentation step, resulting in waste of energy. According to the method of the present invention, Since the reaction temperature for obtaining sugar and the fermentation temperature for obtaining ethanol can be set within the same temperature range, energy waste can be avoided, which is efficient.
- a cellulase aqueous solution was prepared by the following procedure. A predetermined amount of mixed cellulase powder was added to deionized water and dissolved while rotating at room temperature for 30 minutes with a rotor at room temperature to obtain a cellulase aqueous solution.
- Cellulases that are saccharifying enzymes include cellulases (manufactured by Sigma Aldrich) and Aspergillus niger (manufactured by Trichoderma reesei; T. reesei) having optimal enzyme activity in the range of pH 3 or more and pH 6 or less.
- a saccharifying enzyme aqueous solution was prepared by the following procedure. In deionized water, 1M acetate buffer (pH 5.0) so that the final pH is adjusted to 0.05M, and 1-2. The cellulase aqueous solution obtained in (1) was added and mixed while rotating at 100 rpm for 30 minutes with a rotor at room temperature to obtain saccharifying enzyme aqueous solutions having the saccharifying enzyme concentrations (cellulase concentration in this example) shown in Table 1 below. It was. These aqueous saccharifying enzyme solutions were designated as Comparative Sample 1 to Comparative Sample 3. The saccharifying enzyme concentration of each comparative sample was calculated using the Bradford method (CBB method) and converted to the protein concentration of BSA (trade name: protein standard substance, manufactured by Sigma Aldrich). The specific procedure for calculating the saccharifying enzyme concentration is as follows.
- a protein assay CBB solution (concentrated 5 times) (manufactured by Nacalai Tesque Co., Ltd.) diluted 5 times with deionized water is added to a disposable cell having a cell length of 10 mm. 0.05 mL of 3 was added, and the mixture was sealed to give a mixed solution. This mixed solution was mixed uniformly by repeating upside down. Thereafter, the mixture was allowed to stand for 30 minutes, and the absorbance at a wavelength of 595 nm was measured using a spectrophotometer UV-3150 (manufactured by Shimadzu Corporation). A sample having a known BSA protein concentration was prepared, and the absorbance was similarly measured to prepare a calibration curve.
- the saccharifying enzyme concentration was calculated from the obtained calibration curve.
- 0.27 g of protein was contained in 1 g of cellulase powder derived from Trichoderma reesei.
- 0.06 g of protein was contained in 1 g of cellulase derived from Aspergillus niger.
- a saccharifying enzyme composition was prepared by the following procedure. In deionized water, 1M acetate buffer (pH 5.0) is finally adjusted to 0.05M as pH adjustment, and solid, spherical colloidal silica (average primary particle diameter: manufactured by water glass method as silica) 35 nm) is dispersed in water, an acidic silica sol (pH 2.1, silica concentration 40 mass%), tripropylene glycol as compound (A), and 1-2. The cellulase aqueous solution obtained in (1) was added and mixed at room temperature while rotating at 100 rpm with a rotor for 30 minutes.
- the saccharifying enzyme concentration (cellulase concentration in this example), silica concentration and compound (A ) Each saccharifying enzyme composition was obtained. These saccharifying enzyme compositions were designated as Sample 1 to Sample 8. The concentration of each component of Sample 1 to Sample 8 shown in Table 2 below is the concentration in the saccharifying enzyme composition.
- a saccharifying enzyme composition was prepared in the same manner as in Samples 1 to 8, except that a polyhydric alcohol compound, a derivative of a polyhydric alcohol compound, or an alkylene oxide adduct of acetylene glycol was used as the compound (A). did.
- These saccharifying enzyme compositions were designated as Sample 9 to Sample 20 shown in Table 2 below.
- the concentration of each component of Sample 9 to Sample 20 shown in Table 2 below is the concentration in the saccharifying enzyme composition. *
- A: Tripropylene glycol B: Ethylene glycol C: Polyethylene glycol (average molecular weight 200) D: Propylene glycol E: Dipropylene glycol F: Polypropylene glycol (average molecular weight 250) G: Polypropylene glycol (average molecular weight 700) H: Polypropylene glycol (average molecular weight 1000) I: Propylene glycol monomethyl ether J: 1,3-butanediol K: Glycerol L: Ethylene oxide adduct of 2,4,7,9-tetramethyl-5-decyne-4,7-diol (number of moles of ethylene oxide added) m + n 10) (Shinfin Chemical Co., Ltd., Surfinol 465) M: 2,4,7,9-tetramethyl-5-decyne-4,7-diol ethylene oxide adduct (methylene
- silica-containing saccharifying enzyme aqueous solution A silica-containing saccharifying enzyme aqueous solution was prepared by the following procedure. In deionized water, 1M acetate buffer (pH 5.0) is finally adjusted to 0.05M as pH adjustment, and solid, spherical colloidal silica (average primary particle size particle) produced by the water glass method as silica. A silica silica sol (pH 2.1, silica concentration 40% by mass) dispersed in water, and 1-2.
- the cellulase aqueous solution obtained in the above was added, mixed at room temperature while rotating at 100 rpm for 30 minutes with a rotor, and mixed with the saccharifying enzyme concentration (cellulase concentration in this example) shown in Table 4 below, and silica containing silica concentration A saccharifying enzyme aqueous solution was obtained.
- These silica-containing saccharifying enzyme aqueous solutions were used as Comparative Sample 12 to Comparative Sample 14.
- the concentration of each constituent component of Comparative Sample 12 to Comparative Sample 14 shown in Table 4 below is the concentration in the silica-containing saccharifying enzyme aqueous solution.
- microcrystalline cellulose powder (crystal type: I type, trade name: Avicel PH-101, manufactured by Sigma Aldrich) was 0. After adding .05 g (equivalent to 5 mg / mL), the cap was sealed. *
- Example 1 Regarding the saccharification reaction solution obtained from the saccharification enzyme composition of Sample 1 (hereinafter referred to as the saccharification reaction solution of Example 1) using the enzyme method (GOD method), 1-8. The amount of glucose produced 2 days after the enzymatic reaction was calculated.
- a 3.0 mL coloring reagent solution was added to a disposable cell having a cell length of 10 mm, then 0.02 mL of the above filtrate was added, and the mixture was sealed to obtain a mixed solution. Next, this mixed solution was mixed evenly by repeating upside down. Then, it stood for 15 minutes at 24 degreeC, and the light absorbency of wavelength 505nm was measured using the spectrophotometer, and it was set as Es. Next, 3.0 mL of the coloring reagent is added to a disposable cell having a cell length of 10 mm, 0.02 mL of glucose standard solution II (500 mg / dL) is added, and the mixture is turned upside down and mixed uniformly.
- Example 2 to Example 20 For each saccharification reaction solution obtained from the saccharification enzyme compositions of Sample 2 to Sample 20 (hereinafter referred to as saccharification reaction solutions of Example 2 to Example 20) in the same manner as in Example 1, 1-8. The amount of glucose produced 2 days after the enzymatic reaction was calculated, and the results are shown in Table 5 below.
- FIG. 1 is a graph showing the measurement results of the effect of improving the saccharification reaction efficiency by adding tripropylene glycol in Examples 3, 7, and 8 and Comparative Examples 1 to 3, 6, and 10 to 14.
- the saccharification reaction liquids of Comparative Examples 1 to 3 and the saccharification reaction liquids of Comparative Examples 12 to 14 were compared, the saccharification reaction liquids of Comparative Examples 12 to 14 in which silica was added to the cellulase aqueous solution were compared.
- the amount of glucose produced was increased, and the saccharification reaction efficiency was improved.
- Example 4 in which silica and tripropylene glycol were added to the cellulase aqueous solution were carried out.
- the amount of glucose produced was increased, and further improvement in saccharification reaction efficiency was observed.
- the saccharification reaction liquids of Comparative Examples 1 to 3 and the saccharification reaction liquids of Comparative Example 6, Comparative Example 10, and Comparative Example 11 are compared, the saccharification reaction efficiency is improved even when tripropylene glycol is added to the cellulase aqueous solution. I didn't. Accordingly, it was confirmed that the saccharification reaction efficiency was improved by using silica and tripropylene glycol together in the saccharification reaction of cellulose.
- Example 7 and Example 8 a reduction of about 30% of the amount used can be expected, and the amount of cellulase used in the saccharification reaction can be further reduced by about 10% compared to the case where silica is added to the cellulase aqueous solution. it is conceivable that. *
- FIG. 2 is a graph showing measurement results of the effect of improving the saccharification reaction efficiency by the tripropylene glycol concentration in Examples 1 to 6 and Comparative Examples 1, 4 to 9, and 12.
- the mass ratio of silica and tripropylene glycol tripropylene glycol / silica
- the saccharification reaction efficiency is greatly improved, and the combined effect of both is confirmed. I was able to. Therefore, it was suggested from this result that the amount of glucose produced depends particularly on the amount of tripropylene glycol added.
- saccharification enzyme cellulase
- the compound (A) other than tripropylene glycol that is, a polyhydric alcohol compound, a derivative of a polyhydric alcohol compound, or acetylene glycol
- the compound (A) other than tripropylene glycol that is, a polyhydric alcohol compound, a derivative of a polyhydric alcohol compound, or acetylene glycol
- FIG. 3 shows the measurement results of the effect of improving the saccharification reaction efficiency by the addition of the polyhydric alcohol compounds of Examples 9 to 20 and Comparative Examples 1 and 12, derivatives of polyhydric alcohol compounds, or alkylene oxide adducts of acetylene glycol. It is a graph. As shown in FIG. 3, when the saccharification reaction solutions of Examples 9 to 20 and the saccharification reaction solutions of Comparative Examples 1 and 12 were compared, silica, polyhydric alcohol compound and polyhydric alcohol compound were added to the cellulase aqueous solution. In Examples 9 to 20 to which a derivative or an alkylene oxide adduct of acetylene glycol was added, an effect of improving the saccharification reaction efficiency was observed.
- a saccharifying enzyme composition was prepared by the following procedure. 1M acetic acid buffer (pH 5.0) as final pH adjustment in deionized water, and solid and spherical colloidal silica (average primary particle size: 85 nm) produced by the water glass method as silica. ) In an aqueous silica dispersion (pH 9.3, silica concentration 40% by mass), polypropylene glycol (average molecular weight 1000) (hereinafter referred to as PPG1000) as compound (A), and 2-1.
- PPG1000 average molecular weight 1000
- the cellulase aqueous solution obtained in the above was added and mixed at room temperature while rotating at 100 rpm with a rotor for 30 minutes, and the saccharifying enzyme concentration (cellulase concentration in this example), silica concentration and PPG1000 concentration shown in Table 7 below were mixed.
- a saccharifying enzyme composition was obtained.
- This saccharifying enzyme composition was used as Sample 21.
- concentration of each structural component of the sample 21 shown in following Table 7 is a density
- a saccharifying enzyme composition was prepared by the following procedure. Add 1M acetate buffer (pH 5.0) and the above-mentioned cellulase aqueous solution to deionized exchange water so that the final pH is 0.05M, and mix at room temperature with a rotor at 100rpm for 30 minutes. Thus, a saccharifying enzyme aqueous solution having a saccharifying enzyme concentration (cellulase concentration in this example) shown in Table 7 below was obtained. This aqueous saccharifying enzyme solution was used as Comparative Sample 15.
- silica-containing saccharifying enzyme aqueous solution A silica-containing saccharifying enzyme aqueous solution was prepared by the following procedure. 1M acetic acid buffer (pH 5.0) as final pH adjustment in deionized water, and solid and spherical colloidal silica (average primary particle size: 85 nm) produced by the water glass method as silica. ) In an aqueous silica dispersed in water (pH 9.3, silica concentration 40 mass%), and 2-1.
- the cellulase aqueous solution obtained in the above was added, mixed at room temperature while rotating at 100 rpm with a rotor for 30 minutes, and mixed with the saccharifying enzyme concentration (cellulase concentration in this example) shown in Table 7 below, and silica containing silica concentration A saccharifying enzyme aqueous solution was obtained.
- This silica-containing saccharifying enzyme aqueous solution was used as Comparative Sample 17.
- concentration of each structural component of the comparative sample 17 shown in following Table 7 is a density
- Example 21 (2-8. Calculation of glucose production)
- the saccharification reaction solution obtained from the saccharification enzyme composition of Sample 21 was 2-7.
- the amount of glucose produced 3 days after the enzymatic reaction was calculated, and the results are shown in Table 8 below.
- Comparative Examples 15 to 17 In the same manner as in Example 1, a saccharification reaction solution obtained from the saccharification enzyme aqueous solution of Comparative Sample 15, the PPG1000-containing saccharification enzyme aqueous solution of Comparative Sample 16, and the silica-containing saccharification enzyme aqueous solution of Comparative Sample 17 (hereinafter, Comparative Examples 15 to 17 saccharification reaction solution) 2-7. The amount of glucose produced 3 days after the enzymatic reaction was calculated, and the results are shown in Table 8 below.
- FIG. 4 is a graph showing the measurement results of the effect of improving the saccharification reaction efficiency by the addition of PPG1000 in Example 21 and Comparative Examples 15 to 17.
- the saccharification reaction solution of Comparative Example 15 the saccharification reaction solution of Comparative Example 16 in which PPG1000 is added to the cellulase aqueous solution
- the saccharification reaction solution of Comparative Example 17 in which silica is added to the cellulase aqueous solution the aqueous solution of cellulase.
- Example 21 Comparing the saccharification reaction solution of Example 21 to which silica and PPG1000 were added, the amount of glucose produced in Example 21 in which silica and PPG1000 were added to the cellulase aqueous solution was increased, and the saccharification reaction efficiency was improved. It was observed. Therefore, it was confirmed that the efficiency of the saccharification reaction was improved by using silica and PPG1000 together even if a commercially available cellulase was used. *
- a cellulase aqueous solution was prepared by the following procedure. A predetermined amount of mixed cellulase powder was added to deionized water and dissolved while rotating at room temperature for 30 minutes with a rotor at room temperature to obtain a cellulase aqueous solution.
- Cellulases that are saccharifying enzymes include cellulases (manufactured by Sigma Aldrich) and Aspergillus niger (manufactured by Trichoderma reesei; T. reesei) having optimal enzyme activity in the range of pH 3 or more and pH 6 or less.
- a saccharifying enzyme composition was prepared by the following procedure. 1M acetic acid buffer (pH 5.0) so that the final pH is adjusted to 0.05M in deionized water, and diatomaceous earth (Oplite P-1200, manufactured by Chuo Silica Co., Ltd., silica content: 90 mass) %, Average secondary particle size: 15 ⁇ m), as compound (A) 2-2. The same PPG1000, and 3-2.
- the cellulase aqueous solution obtained in the above was added, mixed at room temperature while rotating at 100 rpm for 30 minutes with a rotor, and mixed with the saccharifying enzyme concentration (cellulase concentration in this example), diatomaceous earth concentration and PPG1000 concentration shown in Table 9 below.
- a saccharifying enzyme composition was obtained. This saccharifying enzyme composition was used as Sample 22.
- concentration of each structural component of the sample 22 shown in following Table 9 is a density
- a saccharifying enzyme composition was prepared in the same manner as in Sample 22, except that diatomaceous earth having a different average secondary particle size was used. These saccharifying enzyme compositions were designated as Sample 23 to Sample 28 shown in Table 9 below. The concentration of each component of Sample 23 to Sample 28 shown in Table 9 below is the concentration in the saccharifying enzyme composition.
- N Oplite P-1200, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 15 ⁇ m
- O Silica # 100F, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 19 ⁇ m
- P Silica # 300S, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 19 ⁇ m
- Q Silica # 600S, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 30 ⁇ m
- R Silica # 600H, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 38 ⁇ m
- S Silica Queen L, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 25 ⁇ m
- a saccharifying enzyme composition was prepared by the following procedure. 1M acetate buffer (pH 5.0) so that the final pH is 0.05M in deionized water, and 3-2. The aqueous cellulase solution obtained in the above was added and mixed at room temperature while rotating at 100 rpm for 30 minutes with a rotor to obtain a saccharifying enzyme aqueous solution having a saccharifying enzyme concentration (cellulase concentration in this example) shown in Table 10 below. . This aqueous saccharifying enzyme solution was used as Comparative Sample 18.
- PPG1000-containing saccharifying enzyme aqueous solution A PPG1000-containing saccharifying enzyme aqueous solution using PPG1000 as the compound (A) was prepared by the following procedure.
- a diatomaceous earth-containing saccharifying enzyme aqueous solution was prepared by the following procedure. 1M acetic acid buffer (pH 5.0) so that the final pH is adjusted to 0.05M in deionized water, and diatomaceous earth (Oplite P-1200, manufactured by Chuo Silica Co., Ltd., silica content: 90 mass) %, Average secondary particle size: 15 ⁇ m), and 3-2.
- the cellulase aqueous solution obtained in the above was added, mixed at room temperature while rotating at 100 rpm for 30 minutes with a rotor, and mixed with saccharifying enzyme concentrations (cellulase concentration in this example) shown in Table 10 below, and diatomaceous earth containing diatomaceous earth concentrations
- a saccharifying enzyme aqueous solution was obtained.
- This diatomaceous earth-containing saccharifying enzyme aqueous solution was used as Comparative Sample 20.
- concentration of each structural component of the comparative sample 20 shown in following Table 10 is a density
- diatomaceous earth-containing saccharifying enzyme aqueous solutions were respectively prepared in the same manner as in Comparative Sample 20, except that diatomaceous earth having a different average secondary particle size was used.
- These saccharifying enzyme compositions were used as Comparative Sample 21 to Comparative Sample 26 shown in Table 10 below.
- the concentrations of the constituent components of Comparative Sample 21 to Comparative Sample 26 shown in Table 10 below are concentrations in the diatomaceous earth-containing saccharifying enzyme aqueous solution.
- N Oplite P-1200, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 15 ⁇ m
- O Silica # 100F, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 19 ⁇ m
- P Silica # 300S, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 19 ⁇ m
- Q Silica # 600S, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 30 ⁇ m
- R Silica # 600H, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 38 ⁇ m
- S Silica Queen L, manufactured by Chuo Silica Co., Ltd., silica content: 90% by mass, average secondary particle size: 25 ⁇ m
- microcrystalline cellulose powder (crystal type: I type, trade name: Avicel PH-101, manufactured by Sigma Aldrich) was 0. After adding .50 g (equivalent to 50 mg / mL), the cap was sealed. *
- the saccharifying enzyme composition of Samples 21 to 28 was used except that the saccharifying enzyme aqueous solution of Comparative Sample 18, the PPG 1000-containing saccharifying enzyme aqueous solution of Comparative Sample 19 and the diatomaceous earth-containing saccharifying enzyme aqueous solution of Comparative Sample 20 to Comparative Sample 26 were used.
- the saccharification reaction liquid of each comparative sample was obtained in the same manner as the above. *
- Example 22 to Example 28 In the same manner as in Example 1, saccharification reaction liquids obtained from the saccharification enzyme compositions of Sample 22 to Sample 28 (hereinafter referred to as saccharification reaction liquids of Example 22 to Example 28) 3-8. The amount of glucose produced 3 days after the enzymatic reaction was calculated, and the results are shown in Table 11 below.
- FIG. 5 is a graph showing the measurement results of the effect of improving the saccharification reaction efficiency by the addition of PPG1000 in Examples 22 to 28 and Comparative Examples 18 to 26.
- the saccharification reaction solution of Comparative Example 18 the saccharification reaction solution of Comparative Example 19 in which PPG1000 was added to the cellulase aqueous solution
- the saccharification reaction solutions of Comparative Examples 20 to 26 in which diatomaceous earth was added to the cellulase aqueous solution.
- a cellulase aqueous solution was prepared by the following procedure. A predetermined amount of mixed cellulase powder was added to deionized water and dissolved while rotating at room temperature for 30 minutes with a rotor at room temperature to obtain a cellulase aqueous solution.
- Cellulases that are saccharifying enzymes include cellulases (manufactured by Sigma Aldrich) and Aspergillus niger (manufactured by Trichoderma reesei; T. reesei) having optimal enzyme activity in the range of pH 3 or more and pH 6 or less.
- a saccharifying enzyme composition was prepared by the following procedure. 1M acetic acid buffer solution (pH 5.0) so that the final pH is adjusted to 0.05M in deionized water, and silica sand (No. 5, manufactured by Toyo Materan Co., Ltd., silica content: 95% by mass) , Average primary particle diameter: 310 ⁇ m), as compound (A) 2-2. PPG1000, and 4-2.
- the cellulase aqueous solution obtained in the above was added and mixed at room temperature while rotating at 100 rpm with a rotor for 30 minutes, and the saccharifying enzyme concentration (cellulase concentration in this example), silica sand concentration and PPG 1000 concentration shown in Table 13 below were mixed.
- a saccharifying enzyme composition was obtained. This saccharifying enzyme composition was used as sample 29.
- concentration of each structural component of the sample 29 shown in following Table 13 is a density
- silica sand-containing saccharifying enzyme aqueous solution A quartz sand-containing saccharifying enzyme aqueous solution was prepared by the following procedure. 1M acetic acid buffer (pH 5.0) so that the final pH is 0.05M in deionized water, and silica-containing material is silica sand (5, manufactured by Toyo Materan Co., Ltd., silica content: 95% by mass Average primary particle size: 310 ⁇ m), and 4-2.
- the cellulase aqueous solution obtained in the above was added and mixed while rotating at 100 rpm with a rotor for 30 minutes at room temperature, and the saccharifying enzyme concentration (cellulase concentration in this example) shown in Table 13 below, and containing silica sand with a silica sand concentration A saccharifying enzyme aqueous solution was obtained.
- This silica sand-containing saccharifying enzyme aqueous solution was used as Comparative Sample 29.
- concentration of each structural component of the comparative sample 29 shown in the following Table 13 is a density
- U and V of the compound (A) in Table 13 are as shown below.
- U Polypropylene glycol (average molecular weight 1000)
- Example 29 (4-8. Calculation of glucose production) (Example 29, Example 30) About the saccharification reaction liquid obtained from the saccharification enzyme compositions of Sample 29 and Sample 30 (hereinafter referred to as saccharification reaction liquids of Examples 29 and 30) in the same manner as in Example 1, 4-7. The amount of glucose produced 2 days after the enzymatic reaction was calculated, and the results are shown in Table 14 below.
- Comparative Examples 27 to 29 In the same manner as in Example 1, the saccharification reaction solution obtained from the aqueous solution of saccharifying enzyme containing compound (A) of Comparative Sample 27 and Comparative Sample 28 and the aqueous solution of saccharifying enzyme containing silicate sand of Comparative Sample 29 (hereinafter referred to as Comparative Examples 27 to 29). About saccharification reaction solution) 4-7. The amount of glucose produced 2 days after the enzyme reaction was calculated, and the results are shown in Table 14 below.
- FIG. 6 shows a saccharification reaction by adding an ethylene oxide adduct of PPG1000 or 2,4,7,9-tetramethyl-5-decyne-4,7-diol of Examples 29 and 30 and Comparative Examples 1 and 27 to 29. It is the graph which showed the measurement result of the improvement effect of efficiency.
- the saccharification reaction solution of Comparative Example 1 was compared with the cellulase aqueous solution to which PPG1000 or 2,4,7,9-tetramethyl-5-decyne-4,7-diol ethylene oxide adduct was added.
- yeast aqueous solution A yeast aqueous solution was prepared by the following procedure. 0.2 g of yeast powder was added to 40 g of deionized water previously adjusted to 35 ° C. and dissolved while stirring for 20 minutes using a magnetic stirrer while maintaining the temperature at 35 ° C. A yeast aqueous solution of yeast powder 0.2 g / deionized water 40 g) was obtained.
- Saccharomyces cerevisiae Saccharomyces cerevisiae (S. cerevisiae) YP2 (manufactured by Sigma Aldrich) belonging to the genus Saccharomyces (Saccharomyces) was used.
- 5-2. Aqueous ethanol fermentation aqueous solution was prepared by the following procedure. In deionized water, sulfuric acid is finally adjusted to a pH of about 5 as pH adjustment, and urea is finally adjusted to 0.21 mg / mL as a nitrogen source.
- the ethanol enzyme composition was prepared by the following procedure. Solid and spherically produced in deionized water with sulfuric acid so that the final pH is around 5 as a pH adjustment, urea as a nitrogen source and finally 0.21 mg / mL, and a silica-containing material produced by the water glass method. Alkaline silica sol (pH 9.5, silica concentration 40% by mass) in which colloidal silica (average primary particle size: 85 nm) is dispersed in water, as compound (A) 2-2. Similar to PPG1000, 1-2. Cellulase aqueous solution obtained in 5-1.
- the yeast aqueous solution obtained in (1) was added, mixed at room temperature with a magnetic stirrer while rotating for 10 minutes, and the saccharifying enzyme concentration (cellulase concentration in this example), silica concentration, PPG1000 concentration shown in Table 15 below, And the ethanol fermentation composition of yeast concentration was obtained.
- This ethanol fermentation composition was designated as Sample 31.
- concentration of each structural component of the sample 31 shown in following Table 15 is a density
- PPG1000-containing ethanol fermentation aqueous solution A PPG1000-containing ethanol fermentation aqueous solution was prepared by the following procedure. In deionized water, sulfuric acid is finally adjusted to a pH of about 5 as pH adjustment, urea is adjusted to a final 0.21 mg / mL as a nitrogen source, and PPG1000 is used as the compound (A), 1-2. Cellulase aqueous solution obtained in 5-1. The yeast aqueous solution obtained in the above step was added and mixed at room temperature with a magnetic stirrer while rotating for 10 minutes to obtain a PPG1000-containing ethanol fermentation aqueous solution having the saccharifying enzyme concentration, PPG1000 concentration, and yeast concentration shown in Table 15 below. It was.
- silica-containing ethanol fermentation aqueous solution was prepared by the following procedure. Solid and spherical colloids produced by the water glass method in deionized water with sulfuric acid so that the final pH is adjusted to around pH 5, urea as the nitrogen source and finally 0.21 mg / mL, silica. Alkaline silica sol (pH 9.5, silica concentration 40% by mass) in which silica (average primary particle size particle size 85 nm) is dispersed in water, 1-2. Cellulase aqueous solution obtained in 5-1.
- the yeast aqueous solution obtained in the above was added, mixed at room temperature while rotating at 100 rpm for 30 minutes with a rotor, and mixed with the saccharifying enzyme concentration (cellulase concentration in this example), silica concentration, and yeast concentration shown in Table 15 below.
- a silica-containing ethanol fermentation aqueous solution was obtained.
- This silica-containing ethanol fermentation aqueous solution was used as Comparative Sample 32.
- concentration of each structural component of the comparative sample 32 shown in the following Table 15 is a density
- sample 31 10 mL is placed in a 13.5 mL glass bottle and stirred with a 4 mm ⁇ and 10 mm stirrer, and microcrystalline cellulose powder (crystal type: I type, trade name: Avicel PH-101, manufactured by Sigma Aldrich) is 0.
- microcrystalline cellulose powder crystal type: I type, trade name: Avicel PH-101, manufactured by Sigma Aldrich
- Example 31 (5-8. Calculation of ethanol production) (Example 31) Using gas chromatography (GC), the saccharification reaction and the ethanol fermentation liquid obtained from the ethanol fermentation composition of sample 31 (hereinafter referred to as the saccharification reaction and ethanol fermentation liquid of Example 31) and ethanol after ethanol fermentation The amount produced was calculated.
- GC gas chromatography
- Example 31 In a 2 mL microtube, 0.5 mL of a sample of the saccharification reaction and ethanol fermentation liquid of Example 31 was collected, and the enzyme and yeast were inactivated at 105 ° C. for 15 minutes. Next, in order to remove unreacted cellulose, silica-containing substances and yeast, the mixture is centrifuged at 15,000 G for 30 minutes with a high-speed cooling centrifuge SRX-201 (manufactured by Tommy Seiko Co., Ltd.), and then the supernatant The liquid was collected. For the determination of the amount of ethanol produced, the gas chromatograph GC-2014s (manufactured by Shimadzu Corporation) was used to measure the amount of ethanol produced (mg / mL). The measurement result of the amount of ethanol produced (mg / mL) is shown in Table 16 below. . *
- each saccharification reaction and each ethanol fermentation liquid obtained from the ethanol fermentation aqueous solution of Comparative Sample 30, the PPG1000-containing ethanol fermentation aqueous solution of Comparative Sample 31, and the silica-containing substance-containing ethanol fermentation aqueous solution of Comparative Sample 32 (Hereinafter referred to as saccharification reaction and ethanol fermentation liquid of Comparative Examples 30 to 32) 5-7.
- saccharification reaction and the amount of ethanol produced after 2 days of ethanol fermentation were calculated, and the results are shown in Table 16 below.
- FIG. 7 is a graph showing measurement results of the effect of improving ethanol fermentation efficiency by adding PPG1000 in Example 31 and Comparative Examples 30 to 32.
- the saccharification reaction and the ethanol fermentation liquid of Comparative Example 30 and Comparative Example 32 were compared, the amount of ethanol produced was increased in Comparative Example 32 in which silica was added to the cellulase aqueous solution and the yeast aqueous solution. Improvement in ethanol production efficiency was observed.
- the saccharification reaction and the ethanol fermentation liquid of Example 31 and Comparative Example 32 are compared, the amount of ethanol produced is increased in Example 31 in which silica and PPG 1000 are added to the cellulase aqueous solution and the yeast aqueous solution.
- the present invention can be used in an industrial field to which a saccharification technique for producing a sugar such as glucose from cellulose-based biomass containing cellulose or hemicellulose is applied, for example, production of cellulose-based bioethanol.
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Abstract
Description
(1-1.平均一次粒子径)
シリカの平均一次粒子径は、以下の測定装置を用いて測定した。
窒素吸着法測定装置:Monosorb MS-16(カンタクローム・インスツルメンツ・ジャパン合同会社製)
以下の手順で、セルラーゼ水溶液を作製した。
脱イオン交換水中に、所定量の混合セルラーゼの粉末を添加し、室温下、ローターで100rpm、30分間回転させながら溶解してセルラーゼ水溶液を得た。なお、糖化酵素であるセルラーゼとしては、pH3以上、pH6以下の範囲で至適な酵素活性を有するトリコデルマ・リーゼイ(Trichoderma reesei;T. reesei)属由来のセルラーゼ(Sigma Aldrich製)及びアスペルギルス・ニガー(Aspergillus niger;A. niger)属由来のセルラーゼ(MP biomedicals製)を7:3(w/w)の割合で混合した混合セルラーゼを用いた。
以下の手順で、糖化酵素水溶液を作製した。
脱イオン交換水中に、pH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、及び1-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表1に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)の糖化酵素水溶液をそれぞれ得た。これらの糖化酵素水溶液を、比較サンプル1~比較サンプル3とした。各比較サンプルの糖化酵素濃度は、Bradford法(CBB法)を用い、BSA(商品名:タンパク質標準物質、Sigma Aldrich製)のタンパク質濃度に換算して算出した。糖化酵素濃度算出の具体的な手順は以下の通りである。
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中に、pH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカとして水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径:35nm)が水に分散された酸性シリカゾル(pH2.1、シリカ濃度40質量%)、化合物(A)としてトリプロピレングリコール、及び1-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表2に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、シリカ濃度及び化合物(A)濃度の糖化酵素組成物をそれぞれ得た。これらの糖化酵素組成物を、サンプル1~サンプル8とした。なお、下記表2に示したサンプル1~サンプル8の各構成成分の濃度は、糖化酵素組成物中の濃度である。
A:トリプロピレングリコール
B:エチレングリコール
C:ポリエチレングリコール(平均分子量200)
D:プロピレングリコール
E:ジプロピレングリコール
F:ポリプロピレングリコール(平均分子量250)
G:ポリプロピレングリコール(平均分子量700)
H:ポリプロピレングリコール(平均分子量1000)
I:プロピレングリコールモノメチルエーテル
J:1,3-ブタンジオール
K:グリセリン
L:2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=10)
(日信化学工業株式会社製、サーフィノール465)
M:2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=30)
(日信化学工業株式会社製、サーフィノール485)
以下の手順で、化合物(A)としてトリプロピレングリコールを用いたトリプロピレングリコール含有糖化酵素水溶液を作製した。
以下の手順で、シリカ含有糖化酵素水溶液を作製した。
脱イオン交換水中に、pH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカとして水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径粒子径:35nm)が水に分散された酸性シリカゾル(pH2.1、シリカ濃度40質量%)、及び1-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表4に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、及びシリカ濃度のシリカ含有糖化酵素水溶液をそれぞれ得た。これらのシリカ含有糖化酵素水溶液を、比較サンプル12~比較サンプル14とした。なお、下記表4に示した比較サンプル12~比較サンプル14の各構成成分の濃度は、シリカ含有糖化酵素水溶液中の濃度である。
サンプル1~サンプル20の糖化酵素組成物に、微結晶セルロース粉末を添加し、分散させて各サンプルを用いた糖化反応液とした。具体的な手順は以下の通りである。
上述の各サンプル及び各比較サンプルを用いた糖化反応液を、25℃の恒温槽中で、撹拌下で2日間酵素反応させた。この酵素反応により、糖(グルコース)を得た。
(実施例1)
酵素法(GOD法)を用いて、サンプル1の糖化酵素組成物から得られた糖化反応液(以下、実施例1の糖化反応液という)について、1-8.の酵素反応2日後のグルコース生成量を算出した。
実施例1と同様にして、サンプル2~サンプル20の糖化酵素組成物から得られた各糖化反応液(以下、実施例2~実施例20の糖化反応液という)について、1-8.の酵素反応2日後のグルコース生成量を算出し、その結果を下記表5に示した。
実施例1と同様にして、比較サンプル1~比較サンプル3の糖化酵素水溶液、比較サンプル4~比較サンプル11のトリプロピレングリコール含有糖化酵素水溶液、及び比較サンプル12~比較サンプル14のシリカ含有糖化酵素水溶液から得られた各糖化反応液(以下、比較例1~比較例14の糖化反応液という)について、1-8.の酵素反応2日後のグルコース生成量を算出し、その結果を下記表6に示した。
上記表5及び上記表6のグルコース生成量に基づき、各糖化反応液の糖化反応効率について検討した。まず、実施例3、実施例7、実施例8、比較例1~比較例3、比較例6、及び比較例10~比較例14におけるグルコース生成量から、トリプロピレングリコールの添加による糖化反応効率の向上効果について検討した。
(2-1.セルラーゼ水溶液)
T. reesei属由来のセルラーゼ(Sigma Aldrich製)及びA. niger属由来のセルラーゼ(MP biomedicals製)を7:3(w/w)の割合で混合した混合セルラーゼから、市販のセルラーゼ(製品名:Cellic(登録商標) CTec2、Novozymes製)に変更した以外は、1-2.と同様にしてセルラーゼ水溶液を作製した。
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカとして水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径:85nm)が水に分散されたアルカリ性シリカゾル(pH9.3、シリカ濃度40質量%)、化合物(A)としてポリプロピレングリコール(平均分子量1000)(以下、PPG1000という)、及び2-1.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表7に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、シリカ濃度及びPPG1000濃度の糖化酵素組成物を得た。この糖化酵素組成物をサンプル21とした。なお、下記表7に示したサンプル21の各構成成分の濃度は、糖化酵素組成物中の濃度である。
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、及び上述のセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表7に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)の糖化酵素水溶液を得た。この糖化酵素水溶液を比較サンプル15とした。
以下の手順で、化合物(A)として2-2.と同様のPPG1000を用いたPPG1000含有糖化酵素水溶液を作製した。
以下の手順で、シリカ含有糖化酵素水溶液を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカとして水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径:85nm)が水に分散されたアルカリ性シリカゾル(pH9.3、シリカ濃度40質量%)、及び2-1.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表7に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、及びシリカ濃度のシリカ含有糖化酵素水溶液を得た。このシリカ含有糖化酵素水溶液を、比較サンプル17とした。なお、下記表7に示した比較サンプル17の各構成成分の濃度は、シリカ含有糖化酵素水溶液中の濃度である。
サンプル21の糖化酵素組成物に、微結晶セルロース粉末を添加し、分散させて糖化反応液とした。具体的な手順は以下の通りである。
上述の各サンプル及び各比較サンプルを用いた糖化反応液を、50℃の恒温槽中で、撹拌下で3日間酵素反応させた。この酵素反応により、糖(グルコース)を得た。
(実施例21)
実施例1と同様にして、サンプル21の糖化酵素組成物から得られた糖化反応液(以下、実施例21の糖化反応液という)について、2-7.の酵素反応3日後のグルコース生成量を算出し、その結果を下記表8に示した。
実施例1と同様にして、比較サンプル15の糖化酵素水溶液、比較サンプル16のPPG1000含有糖化酵素水溶液、及び比較サンプル17のシリカ含有糖化酵素水溶液から得られた糖化反応液(以下、比較例15~17の糖化反応液という)について、2-7.の酵素反応3日後のグルコース生成量を算出し、その結果を下記表8に示した。
上記表8のグルコース生成量に基づき、各糖化反応液の糖化反応効率について検討した。まず、実施例21、及び比較例15~比較例17におけるグルコース生成量から、PPG1000の添加による糖化反応効率の向上効果について検討した。
(3-1.平均二次粒子径)
珪藻土の平均二次粒子径は、以下の測定装置を用いて測定した。
レーザ回折/散乱式粒子径分布測定装置:LA-300(株式会社堀場製作所製)
以下の手順で、セルラーゼ水溶液を作製した。
脱イオン交換水中に、所定量の混合セルラーゼの粉末を添加し、室温下、ローターで100rpm、30分間回転させながら溶解してセルラーゼ水溶液を得た。なお、糖化酵素であるセルラーゼとしては、pH3以上、pH6以下の範囲で至適な酵素活性を有するトリコデルマ・リーゼイ(Trichoderma reesei;T. reesei)属由来のセルラーゼ(Sigma Aldrich製)及びアスペルギルス・ニガー(Aspergillus niger;A. niger)属由来のセルラーゼ(MP biomedicals製)を7:3(w/w)の割合で混合した混合セルラーゼを用いた。
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカ含有物質として珪藻土(オプライトP-1200、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:15μm)、化合物(A)として2-2.と同様のPPG1000、及び3-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表9に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、珪藻土濃度及びPPG1000濃度の糖化酵素組成物を得た。この糖化酵素組成物をサンプル22とした。なお、下記表9に示したサンプル22の各構成成分の濃度は、糖化酵素組成物中の濃度である。
N:オプライトP-1200、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:15μm
O:シリカ#100F、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:19μm
P:シリカ#300S、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:19μm
Q:シリカ#600S、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:30μm
R:シリカ#600H、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:38μm
S:シリカクイーンL、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:25μm
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、及び3-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表10に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)の糖化酵素水溶液を得た。この糖化酵素水溶液を比較サンプル18とした。
以下の手順で、化合物(A)としてPPG1000を用いたPPG1000含有糖化酵素水溶液を作製した。
以下の手順で、珪藻土含有糖化酵素水溶液を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカ含有物質として珪藻土(オプライトP-1200、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:15μm)、及び3-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表10に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、及び珪藻土濃度の珪藻土含有糖化酵素水溶液を得た。この珪藻土含有糖化酵素水溶液を、比較サンプル20とした。なお、下記表10に示した比較サンプル20の各構成成分の濃度は、珪藻土含有糖化酵素水溶液中の濃度である。
N:オプライトP-1200、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:15μm
O:シリカ#100F、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:19μm
P:シリカ#300S、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:19μm
Q:シリカ#600S、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:30μm
R:シリカ#600H、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:38μm
S:シリカクイーンL、中央シリカ株式会社製、シリカ含有率:90質量%、平均二次粒子径:25μm
サンプル22~サンプル28の糖化酵素組成物に、微結晶セルロース粉末を添加し、分散させて糖化反応液とした。具体的な手順は以下の通りである。
上述の各サンプル及び各比較サンプルを用いた糖化反応液を、40℃の恒温槽中で、撹拌下で3日間酵素反応させた。この酵素反応により、糖(グルコース)を得た。
(実施例22~実施例28)
実施例1と同様にして、サンプル22~サンプル28の糖化酵素組成物から得られた糖化反応液(以下、実施例22~実施例28の糖化反応液という)について、3-8.の酵素反応3日後のグルコース生成量を算出し、その結果を下記表11に示した。
実施例1と同様にして、比較サンプル18の糖化酵素水溶液、比較サンプル19のPPG1000含有糖化酵素水溶液、及び比較サンプル20~比較サンプル26の珪藻土含有糖化酵素水溶液から得られた糖化反応液(以下、比較例18~比較例26の糖化反応液という)について、3-8.の酵素反応3日後のグルコース生成量を算出し、その結果を下記表12に示した。
上記表11及び上記表12のグルコース生成量に基づき、各糖化反応液の糖化反応効率について検討した。まず、実施例22~実施例28、及び比較例18~比較例26におけるグルコース生成量から、PPG1000の添加による糖化反応効率の向上効果について検討した。
(4-1.平均一次粒子径)
珪砂の平均一次粒子径は、以下の測定装置を用いて測定した。測定の際には、観察倍率50倍で粒子を100個観察し、長軸の長さを算術平均した値を用いた。
金属顕微鏡:ECLIPSE ME600D(株式会社ニコンインステック製)
以下の手順で、セルラーゼ水溶液を作製した。
脱イオン交換水中に、所定量の混合セルラーゼの粉末を添加し、室温下、ローターで100rpm、30分間回転させながら溶解してセルラーゼ水溶液を得た。なお、糖化酵素であるセルラーゼとしては、pH3以上、pH6以下の範囲で至適な酵素活性を有するトリコデルマ・リーゼイ(Trichoderma reesei;T. reesei)属由来のセルラーゼ(Sigma Aldrich製)及びアスペルギルス・ニガー(Aspergillus niger;A. niger)属由来のセルラーゼ(MP biomedicals製)を7:3(w/w)の割合で混合した混合セルラーゼを用いた。
以下の手順で、糖化酵素組成物を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカ含有物質として珪砂(5号、株式会社トーヨーマテラン製、シリカ含有率:95質量%、平均一次粒子径:310μm)、化合物(A)として2-2.と同様のPPG1000、及び4-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表13に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、珪砂濃度及びPPG1000濃度の糖化酵素組成物を得た。この糖化酵素組成物をサンプル29とした。なお、下記表13に示したサンプル29の各構成成分の濃度は、糖化酵素組成物中の濃度である。
以下の手順で、化合物(A)としてPPG1000を用いたPPG1000含有糖化酵素水溶液を作製した。
以下の手順で、珪砂含有糖化酵素水溶液を作製した。
脱イオン交換水中にpH調整として最終的に0.05Mになるよう1M酢酸緩衝液(pH5.0)、シリカ含有物質として珪砂(5号、トーヨーマテラン株式会社製、シリカ含有率:95質量%、平均一次粒子径:310μm)、及び4-2.で得られたセルラーゼ水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表13に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、及び珪砂濃度の珪砂含有糖化酵素水溶液を得た。この珪砂含有糖化酵素水溶液を、比較サンプル29とした。なお、下記表13に示した比較サンプル29の各構成成分の濃度は、珪砂含有糖化酵素水溶液中の濃度である。
U:ポリプロピレングリコール(平均分子量1000)
V:2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=10)
(日信化学工業株式会社製サーフィノール465)
サンプル29,30の糖化酵素組成物、比較サンプル27,28の化合物(A)含有糖化酵素水溶液及び比較サンプル29の珪砂含有糖化酵素水溶液を用いたこと以外は、サンプル1~サンプル18の糖化酵素組成物と同様にして、サンプル29,サンプル30及び比較サンプル27~比較サンプル29の糖化反応液を得た。
実施例1と同様にして、上述の各サンプル及び各比較サンプルを用いた糖化反応液を、25℃の恒温槽中で、撹拌下で2日間酵素反応させた。この酵素反応により、糖(グルコース)を得た。
(実施例29,実施例30)
実施例1と同様にして、サンプル29及びサンプル30の糖化酵素組成物から得られた糖化反応液(以下、実施例29,30の糖化反応液という)について、4-7.の酵素反応2日後のグルコース生成量を算出し、これらの結果を下記表14に示した。
実施例1と同様にして、比較サンプル27及び比較サンプル28の化合物(A)含有糖化酵素水溶液及び比較サンプル29の珪砂含有糖化酵素水溶液から得られた糖化反応液(以下、比較例27~29の糖化反応液という)について、4-7.酵素反応2日後のグルコース生成量を算出し、これらの結果を下記表14に示した。
上記表14のグルコース生成量に基づき、各糖化反応液の糖化反応効率について検討した。まず、実施例29、実施例30、及び比較例1、比較例27~比較例29におけるグルコース生成量から、PPG1000又は2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物の添加による糖化反応効率の向上効果について検討した。
(5-1.酵母水溶液)
以下の手順で、酵母水溶液を作製した。
予め35℃に調整した脱イオン交換水40g中に酵母の粉末0.2gを添加し、35℃に保持したままマグネティックスターラーを用いて、20分間撹拌させながら溶解して0.5質量%(=酵母粉末0.2g/脱イオン交換水40g)の酵母水溶液を得た。なお、酵母としては、サッカロマイセス(Saccharomyces)属のサッカロマイセス・セレビシエ(Saccharomyces cerevisiae;S. cerevisiae) YP2(Sigma Aldrich製)を用いた。
以下の手順で、エタノール発酵水溶液を作製した。
脱イオン交換水中に、pH調整として最終的にpH5前後になるよう硫酸、窒素源として最終的に0.21mg/mLとなるよう尿素、1-2.で得られたセルラーゼ水溶液及び5-1.で得られた酵母水溶液を添加し、室温下、マグネティックスターラーで、10分間回転させながら混合して、下記表15に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、及び酵母濃度のエタノール発酵水溶液を得た。このエタノール発酵水溶液を比較サンプル30とした。
以下の手順で、エタノール酵素組成物を作製した。
脱イオン交換水中に、pH調整として最終的にpH5前後になるよう硫酸、窒素源として最終的に0.21mg/mLとなるよう尿素、シリカ含有物質として水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径:85nm)が水に分散されたアルカリ性シリカゾル(pH9.5、シリカ濃度40質量%)、化合物(A)として2-2.と同様のPPG1000、1-2.で得られたセルラーゼ水溶液及び5-1.で得られた酵母水溶液を添加し、室温下、マグネティックスターラーで、10分間回転させながら混合して、下記表15に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、シリカ濃度、PPG1000濃度、及び酵母濃度のエタノール発酵組成物を得た。このエタノール発酵組成物をサンプル31とした。なお、下記表15に示したサンプル31の各構成成分の濃度は、エタノール発酵組成物中の濃度である。
以下の手順で、PPG1000含有エタノール発酵水溶液を作製した。
脱イオン交換水中に、pH調整として最終的にpH5前後になるよう硫酸、窒素源として最終的に0.21mg/mLとなるよう尿素、化合物(A)としてPPG1000、1-2.で得られたセルラーゼ水溶液及び5-1.で得られた酵母水溶液を添加し、室温下、マグネティックスターラーで、10分間回転させながら混合して、下記表15に示した糖化酵素濃度、PPG1000濃度、及び酵母濃度のPPG1000含有エタノール発酵水溶液を得た。このPPG1000含有エタノール発酵水溶液を比較サンプル31とした。なお、下記表15に示した比較サンプル31の各構成成分の濃度は、PPG1000含有エタノール発酵水溶液中の濃度である。
以下の手順で、シリカ含有エタノール発酵水溶液を作製した。
脱イオン交換水中に、pH調整として最終的にpH5前後になるよう硫酸、窒素源として最終的に0.21mg/mLとなるよう尿素、シリカとして水ガラス法で製造された中実で球状のコロイダルシリカ(平均一次粒子径粒子径85nm)が水に分散されたアルカリ性シリカゾル(pH9.5、シリカ濃度40質量%)、1-2.で得られたセルラーゼ水溶液及び5-1.で得られた酵母水溶液を添加し、室温下、ローターで100rpm、30分間回転させながら混合して、下記表15に示した糖化酵素濃度(本実施例ではセルラーゼ濃度)、シリカ濃度、及び酵母濃度のシリカ含有エタノール発酵水溶液を得た。このシリカ含有エタノール発酵水溶液を、比較サンプル32とした。なお、下記表15に示した比較サンプル32の各構成成分の濃度は、シリカ含有エタノール発酵水溶液中の濃度である。
サンプル31のエタノール発酵組成物に、微結晶セルロース粉末を添加し、分散させてサンプル31を用いた糖化反応及びエタノール発酵液とした。具体的な手順は以下の通りである。
上述の各サンプル及び各比較サンプルを用いた糖化反応及びエタノール発酵液を、31℃の恒温槽中で、撹拌下で2日間それぞれ酵素反応及びエタノール発酵を同時にさせた。この酵素反応により得られた糖(グルコース)を用いてエタノール発酵させ、エタノールを得た。
(実施例31)
ガスクロマトグラフィ(GC)を用いて、サンプル31のエタノール発酵組成物から得られた糖化反応及びエタノール発酵液(以下、実施例31の糖化反応及びエタノール発酵液という)の酵素反応及びエタノール発酵後のエタノール生成量を算出した。
<分析条件>
カラム:ポーラパックQ、長さ1m、内径3.2mm(ジーエルサイエンス株式会社製)
検出器:FID
カラム温度:150℃
流量:40mL/min
サンプル量:2μL
検量線用標品:エタノール10mg/mL水溶液
実施例31と同様にして、比較サンプル30のエタノール発酵水溶液、比較サンプル31のPPG1000含有エタノール発酵水溶液、及び比較サンプル32のシリカ含有物質含有エタノール発酵水溶液から得られた各糖化反応及び各エタノール発酵液(以下、比較例30~比較例32の糖化反応及びエタノール発酵液という)について、5-7.の糖化反応及びエタノール発酵2日後のエタノール生成量を算出し、その結果を下記表16に示した。
上記表16のエタノール生成量に基づき、各糖化反応及びエタノール発酵液のエタノール発酵効率について検討した。実施例31及び比較例30~比較例32におけるエタノール生成量から、PPG1000の添加による糖化反応効率の向上効果について検討した。
Claims (22)
- セルロース及びヘミセルロースの少なくとも一方を糖化する糖化反応液であって、前記セルロース及び前記ヘミセルロースの少なくとも一方と、糖化酵素と、シリカ又はシリカ含有物質と、下記一般式(1)で表される多価アルコール化合物及びその誘導体、及び下記一般式(2)で表されるアセチレングリコール及びそのアルキレンオキサイド付加物からなる群より選ばれる少なくとも1種の化合物(A)とを含有することを特徴とする糖化反応液。
- 前記シリカ含有物質は、珪藻土又は珪砂であることを特徴とする請求項1に記載の糖化反応液。
- 前記シリカ又は前記シリカ含有物質中のシリカと前記化合物(A)との質量比率(化合物(A)/シリカ)が、0.0001以上、1以下であることを特徴とする請求項1又は請求項2に記載の糖化反応液。
- 前記多価アルコール化合物は、2価アルコール、3価アルコール及び4価アルコールのモノマー、ジオマー及びトリゴマー、並びにポリアルキレングリコールからなる群から選ばれる少なくとも1種を含有することを特徴とする請求項1乃至請求項3のいずれか一項に記載の糖化反応液。
- 前記多価アルコール化合物の誘導体は、多価アルコールエーテル類及びポリアルキレングリコールエーテル類からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項1乃至請求項4のいずれか一項に記載の糖化反応液。
- 前記化合物(A)は、エチレングリコール、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコール、1,3-ブタンジオール、グリセロール、ペンタエリトリトール、ポリエチレングリコール、ポリプロピレングリコール、プロピレングリコール1-モノメチルエーテル、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=10)、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=30)からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項1乃至請求項5のいずれか一項に記載の糖化反応液。
- セルロース及びヘミセルロースの少なくとも一方を糖化する糖化酵素組成物であって、糖化酵素と、シリカ又はシリカ含有物質と、下記一般式(1)で表される多価アルコール化合物及びその誘導体、及び下記一般式(2)で表されるアセチレングリコール及びそのアルキレンオキサイド付加物からなる群より選ばれる少なくとも1種の化合物(A)とを含有し、前記シリカ又は前記シリカ含有物質中のシリカと前記化合物(A)との質量比率(化合物(A)/シリカ)が、0.0001以上、1以下であることを特徴とする糖化酵素組成物。
- 前記シリカ含有物質は、珪藻土又は珪砂であることを特徴とする請求項7に記載の糖化酵素組成物。
- 前記多価アルコール化合物は、2価アルコール、3価アルコール及び4価アルコールのモノマー、ジオマー及びトリゴマー、並びにポリアルキレングリコールからなる群から選ばれる少なくとも1種を含有することを特徴とする請求項7又は請求項8に記載の糖化酵素組成物。
- 前記多価アルコール化合物の誘導体は、多価アルコールエーテル類及びポリアルキレングリコールエーテル類からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項7乃至請求項9のいずれか一項に記載の糖化酵素組成物。
- 前記化合物(A)は、エチレングリコール、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコール、1,3-ブタンジオール、グリセロール、ペンタエリトリトール、ポリエチレングリコール、ポリプロピレングリコール、プロピレングリコール1-モノメチルエーテル、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=10)、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=30)からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項7乃至請求項10のいずれか一項に記載の糖化酵素組成物。
- セルロース及びヘミセルロースの少なくとも一方を糖化する糖化反応液を用いて糖を製造する糖の製造方法であって、前記セルロース及び前記ヘミセルロースの少なくとも一方と、糖化酵素と、シリカ又はシリカ含有物質と、下記一般式(1)で表される多価アルコール化合物及びその誘導体、及び下記一般式(2)で表されるアセチレングリコール及びそのアルキレンオキサイド付加物からなる群より選ばれる少なくとも1種の化合物(A)とを含有する糖化反応液を用いて糖を製造することを特徴とする糖の製造方法。
- 前記シリカ含有物質は、珪藻土又は珪砂であることを特徴とする請求項12に記載の糖の製造方法。
- 前記シリカ又は前記シリカ含有物質中のシリカと前記化合物(A)との質量比率(化合物(A)/シリカ)が、0.0001以上、1以下であることを特徴とする請求項12又は請求項13に記載の糖の製造方法。
- 前記多価アルコール化合物は、2価アルコール、3価アルコール及び4価アルコールのモノマー、ジオマー及びトリゴマー、並びにポリアルキレングリコールからなる群から選ばれる少なくとも1種を含有することを特徴とする請求項12乃至請求項14のいずれか一項に記載の糖の製造方法。
- 前記多価アルコール化合物の誘導体は、多価アルコールエーテル類及びポリアルキレングリコールエーテル類からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項12乃至請求項15のいずれか一項に記載の糖の製造方法。
- 前記化合物(A)は、エチレングリコール、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコール、1,3-ブタンジオール、グリセロール、ペンタエリトリトール、ポリエチレングリコール、ポリプロピレングリコール、プロピレングリコール1-モノメチルエーテル、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=10)、2,4,7,9-テトラメチル-5-デシン-4,7-ジオールのエチレンオキサイド付加物(エチレンオキサイド付加モル数m+n=30)からなる群から選ばれる少なくとも1種を含有することを特徴とする請求項12乃至請求項16のいずれか一項に記載の糖の製造方法。
- 請求項12乃至請求項17のいずれか一項に記載の糖の製造方法により得られた糖を用いて、発酵微生物によるエタノール発酵を行い、エタノールを製造することを特徴とするエタノールの製造方法。
- 糖を製造する工程に発酵微生物を添加して、糖の製造とエタノール発酵とを同時に行うことを特徴とする請求項18に記載のエタノールの製造方法。
- 前記発酵微生物は、酵母、カビ又は細菌であることを特徴とする請求項18又は請求項19に記載のエタノールの製造方法。
- 前記発酵微生物は、サッカロマイセス(Saccharomyces)属、ザイモモナス(Zymomonas)属、ピチア(Pichia)属、カンジダ(Candida)属、ザイモバクター(Zymobacter)属、コリネバクテリウム(Corynebacterium)属、クルイウェロマイセス(Kluyveromyces)属又はエシェリキア(Escherichia)属に属する微生物であることを特徴とする請求項20に記載のエタノールの製造方法。
- エタノール発酵を15℃以上、35℃以下で行うことを特徴とする請求項18乃至請求項21のいずれか一項に記載のエタノールの製造方法。
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