CN101469335B - Method for preparing ethyl alcohol from sweet sorghum - Google Patents
Method for preparing ethyl alcohol from sweet sorghum Download PDFInfo
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- CN101469335B CN101469335B CN2007103046473A CN200710304647A CN101469335B CN 101469335 B CN101469335 B CN 101469335B CN 2007103046473 A CN2007103046473 A CN 2007103046473A CN 200710304647 A CN200710304647 A CN 200710304647A CN 101469335 B CN101469335 B CN 101469335B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention discloses a method for preparing ethanol by sweet sorghum, which comprises the steps that stored sweet sorghum are crushed, squeezed and fermented to obtain sweet sorghum sugar juice, wherein a method for storing the sweet sorghum comprises the following steps: the sweet sorghum is stacked on a supporting surface in a flat lying and superposition mode, the stacking height is between1 and 6 meters, and a germicide solution is sprayed on the sweet sorghum. The method ensures good ventilation effect among the stacked sweet sorghum and effectively reduces the temperature of a stacking center during storage by changing the storage method of the sweet sorghum, so the possibility of the pollution by fungi and bacteria is reduced; in addition, the spraying of the germicide solution on the sweet sorghum, in particular at an incision of a sweet sorghum straw can further prevent the fungi from infecting. Therefore, the loss amount of sugar in the sweet sorghum is reduced effectively during the storage, and the yield of the ethanol is improved greatly.
Description
Technical field
The invention relates to the alcoholic acid preparation method, more specifically is the method about preparing ethyl alcohol from sweet sorghum.
Background technology
The method of the employing preparing ethyl alcohol from sweet sorghum of prior art mainly comprises liquid fermenting and two kinds of methods of solid fermentation, and wherein, said liquid fermentation process mainly comprises following two steps: 1) sorgo stalk is carried out fragmentation, squeezing, obtain the sweet sorghum syrup; The sweet sorghum syrup of 2) fermenting and obtaining.
Sweet sorghum also cries sorgo, sweet stalk or sugared Chinese sorghum, is a kind of crop varieties with higher biological yield and candy output.The staple of sweet sorghum is a carbohydrate; With dextrose plus saccharose is main; Contain a spot of protein and fat; Be the good sources of carbon of fermentation industry, can be widely used in as carbon source in the fermentative prodn of microbiotic, organic acid, monosodium glutamate, alcohol, yeast and Nucleotide, also can be used as additive and directly be used for foodstuffs industry.Because the sweet sorghum purposes is comparatively extensive, sugar degree is higher in the stem stalk in addition, and is easier to be converted into alcohol, and from energy security and Economic development aspect, the juice that is obtained by sweet sorghum stalk is produced alcohol fuel and had comparatively wide prospect.
But because the plantation of sweet sorghum has seasonality, and limited by the treatment capacity of preparing ethyl alcohol from sweet sorghum, behind harvesting a large amount of harvesting in season sweet sorghum, the sweet sorghum that part fails in time to use need carry out the short period of time and store.If storage time is long, in the sweet sorghum loss of sugar very fast, then adopt sweet sorghum fermenting alcohol can reduce ethanol yield through storing.The more important thing is; In the storage process of sweet sorghum; Be easy to cause the part sweet sorghum mouldy rotten because the stacking core temperature of sweet sorghum heap is too high, more serious meeting causes fungi, infectation of bacteria, and the sugar in the sweet sorghum is lost in a large number; And syrup viscosity increases, and has a strong impact on ethanol yield.
Summary of the invention
The objective of the invention is to overcome the lower defective of alcohol yied that the method for existing employing preparing ethyl alcohol from sweet sorghum prepares, the method for the higher employing preparing ethyl alcohol from sweet sorghum of a kind of alcohol yied is provided.
Contriver of the present invention finds that the sweet sorghum of prior art prepares in the method for alcohol fuel, and the storage method of sweet sorghum is not had special demands; Generally be generally a large amount of sorgo stalks are stacked on the ground closely, stack highly higherly, and the stacking amount is bigger; Make that the stacking core temperature of sweet sorghum is too high and be easy to cause that the part sweet sorghum is mouldy rots; More serious meeting produces a kind of fungi---jewel boom bacterium, and it can decompose the oligosaccharide compositions in the sweet sorghum, makes the sugar loss of sweet sorghum serious; Can lose the sugar of 25 weight % at most; And syrup viscosity is increased, and therefore, the ethanol yield that causes using the syrup alcohol prepared by fermenting that obtains through the sweet sorghum that stores to obtain is lower.
The invention provides a kind of method of preparing ethyl alcohol from sweet sorghum; This method comprises carrying out fragmentation, squeezing through the sweet sorghum that stores; And the sweet sorghum syrup that obtains of fermentation, wherein, the storage method of said sweet sorghum comprise with sweet sorghum lie low, stacked being deposited on the bearing surface; Stacking is 1-6 rice highly, and on sweet sorghum, sprays microbicide solution.
According to the method for the invention, through changing the storage method of sweet sorghum, good ventilation effect between the sweet sorghum heap that has guaranteed to stack; Effectively reduce the temperature of stacking the center in the storage process, thereby reduced by the possibility of fungal contamination, in addition; According to the method for the invention; Also be included in and spray microbicide solution on the sweet sorghum,, can prevent further that fungi from spreading to the inner infection of sweet sorghum from incision particularly at the incision spraying microbicide solution of sorgo stalk; Reduce in the storage process loss amount of sugar in the sweet sorghum effectively, thereby improved ethanol yield greatly.For example; Under all identical situation of other condition; The alcoholic acid average yield that the syrup fermentation that the sweet sorghum through storing of the employing embodiment of the invention 1 obtains makes reaches 7.50%; And the alcoholic acid average yield that the syrup fermentation that the sweet sorghum through storing of adopting Comparative Examples 1 obtains makes is merely 5.46%, and increase rate is up to 37.4%.
Embodiment
According to the present invention; The method of said preparing ethyl alcohol from sweet sorghum comprises carries out fragmentation, squeezing with the sweet sorghum through storage, and the sweet sorghum syrup of fermenting and obtaining, wherein; The storage method of said sweet sorghum comprise with sweet sorghum lie low, stacked being deposited on the bearing surface; Stacking is 1-6 rice highly, is preferably 2-5 rice, and on sweet sorghum, sprays microbicide solution.
The stacking area of said sweet sorghum is not special to be limited, and can fit the area of storage place and decides.
According to method of the present invention; Under the preferable case; In order better to guarantee to stack the good ventilation of the sweet sorghum that stores, can not make the temperature at stacking center is too high and grow fungi to the pollution of sweet sorghum again, this method comprises stacks many heaps with sweet sorghum; Distance between the adjacent sweet sorghum heap is at least 30 centimetres, is preferably 50-60 centimetre; And the length of every heap sweet sorghum heap is 3-10 rice, is preferably 3-6 rice; Width is a 1-5 rice, is preferably 2-4 rice.
In order better to guarantee the good ventilation between the sweet sorghum heap; And be easy to carry and carry out the feed operation of follow-up fermentation step, said sweet sorghum is preferably bundled stacking, and each sweet sorghum heap comprises many bundles of sweet sorghumes; The weight of every bundle of sweet sorghum is the 10-25 kilogram, is preferably the 15-25 kilogram; And the length of sweet sorghum is cut into 1-4 rice, be preferably 2-3 rice.
According to method of the present invention; In order to prevent that sweet sorghum is mouldy in the storage process; Before preferably also being included in stacking the sweet sorghum leaf is removed, said method of removing the sweet sorghum leaf can adopt the method for various routines, like the method that can adopt artificial removal or machinery to remove.
Though can guarantee to help the operation of follow-up alcohol prepared by fermenting according to method of the present invention through the sugar loss minimum of the sweet sorghum that stores; Pilling up time is long still can be caused the loss of sugar in the sweet sorghum and is unfavorable for the raising of alcohol yied; Therefore, under the preferable case, before fragmentation; The storage time of said sweet sorghum generally is no more than 150 days, and the best is 3-120 days; Said storing temp is 0-20 ℃, is preferably 0-15 ℃.Because sweet sorghum is generally ripe in autumn, winter, harvesting and storing, so storing temp is generally 0-20 ℃, is preferably 0-15 ℃.
The storing mode of sweet sorghum according to the invention does not receive the restriction of region, and can be applied to the sugar grass raw material of various kinds.
If the storing mode of sweet sorghum is improper; The incision of sweet sorghum stalk is easy to receive at first the infection of fungi or bacterium; Like jewel boom bacterium; Jewel boom bacterium excretory enzyme can decompose the oligosaccharides in the sweet sorghum stalk, and the viscosity of syrup is increased, and makes the sugar degree decline in the sweet sorghum and influences syrup fermentation back ethanol yield.Therefore, according to the present invention, said method also is preferably included in and sprays microbicide solution on the sweet sorghum, under the preferable case, said microbicide solution is sprayed on the incision of sweet sorghum; Further to prevent the pollution of various bacteriums, fungi, guarantee the sugar degree of sweet sorghum in storage process to sweet sorghum.The present invention does not limit the kind of said sterilant is special, can be for well known to a person skilled in the art the growth that can suppress bacterium, fungi or other assorted bacterium and the various sterilant of breeding, such as the bacteria antibiotic of industrial penicillium mould.
Under the preferable case; Sterilant according to the invention contains Sulfothiorine, quaternary ammonium salt and additive, is benchmark with the total amount of said sterilant, and the content of said Sulfothiorine is 10-25 weight %; The content of said quaternary ammonium salt is 5-25 weight %, and said content of additive is 50-70 weight %; Said additive is selected from one or more in phenylformic acid, Sodium Benzoate, calcium propionate, Sorbic Acid, POTASSIUM SORBATE GRANULAR WHITE and the nipagin esters.The preparation method of said sterilant comprises directly Sulfothiorine, quaternary ammonium salt and additive is mixed; It is benchmark that the consumption of each material makes the total amount with said sterilant; The content of Sulfothiorine is 10-25 weight %; The content of quaternary ammonium salt is 5-25 weight %, and content of additive is 50-70 weight %; Said additive is selected from one or more in phenylformic acid, Sodium Benzoate, Sorbic Acid, POTASSIUM SORBATE GRANULAR WHITE and the nipagin esters; Said quaternary ammonium salt can be the structure with a chain alkyl or alkyl, three short-chain alkyls; Also can be to have two chain alkyls or alkyl; The halogenide of the structure of two short-chain alkyls; Wherein, the carbonatoms of said chain alkyl or alkyl can be 8-25, and the carbonatoms of said short-chain alkyl can be 1-7.
In use, said sterilant is mixed the microbicide solution that obtains with water be painted on the incision that on the sweet sorghum or preferably is sprayed on sweet sorghum usually.The consumption of said microbicide solution is not special to be limited, as long as the amount of spraying is enough to guarantee to suppress the growth of bacterium, fungi or other assorted bacterium.Under the preferable case, in the fresh weight of every gram sweet sorghum, the consumption of said microbicide solution is 1-5 weight %, more preferably 2-4 weight %.Generally speaking, it is 10-50ppm that the consumption of water makes the concentration of sterilant in the microbicide solution, is preferably 20-40ppm and gets final product.Said ppm representes the weight of contained solute in the solution of 1,000,000 parts of weight.According to the present invention, when preferably said microbicide solution being sprayed on the incision of sweet sorghum, in order to save cost, in the fresh weight of every gram sweet sorghum, the consumption of said microbicide solution is 0.5-2 weight %, is preferably 1-2 weight %.
According to the present invention, this method also is included on the sweet sorghum of stacking and covers waterproof membrane, and said waterproof membrane can be the hydrophobic membrane of various materials, like plastic film, canvas film etc., perhaps also can be directly with the sweet sorghum foliage cover on the sweet sorghum of stacking.
The present invention only relates to the change to the sweet sorghum storing mode, and sweet sorghum is carried out fragmentation, squeezing, and the method for the sweet sorghum syrup that obtains of fermentation can adopt the conventional the whole bag of tricks in this area to carry out.For example; Said sweet sorghum is carried out the method for broken sweet sorghum that broken method can adopt the various routines of this area; As utilize various disintegrating apparatus, for example shredding machine carries out fragmentation with sorgo stalk; Macrofiber in the sorgo stalk is broken into staple fibre, is beneficial to squeeze in the step syrup and is fully squeezed out.The condition of said fragmentation, method and apparatus are conventionally known to one of skill in the art.
The method of the sweet sorghum of squeezing after the fragmentation can adopt the pressing method of the various routines of this area, as, utilize the sweet sorghum after the press apparatus squeezing fragmentation to obtain the sweet sorghum syrup.The condition of said squeezing, method and apparatus are conventionally known to one of skill in the art.
The method of the sweet sorghum syrup that said fermentation obtains can also adopt and well known to a person skilled in the art that the whole bag of tricks carries out; For example; Said method comprises mixes yeast with the sweet sorghum syrup; And under optimum condition, ferment, said fermentation is with zymic kind and the not special qualification of zymic inoculum size.
Sweet sorghum contains a large amount of sucrose, glucose and fructose; The mikrobe of monose such as glucose and/or fructose, oligosaccharides such as sucrose and/or semi-lactosi of can fermenting may be used to fermenting process of the present invention; Because yeast saccharomyces cerevisiae has the isomerase that transforms each other between sucrase and fructose, the glucose of decomposing sucrose; Therefore, adopt yeast saccharomyces cerevisiae directly to carry out zymamsis to the syrup of sweet sorghum, the employed yeast of the preferred said fermentation of the present invention is a yeast saccharomyces cerevisiae.
In every gram sweet sorghum syrup, the employed zymic inoculum size of fermenting is 10
3-10
8Colony-forming unit, more preferably 10
4-10
6Colony-forming unit.
Said yeast can adopt conventional method inoculation, for example in syrup, adds the seed liquor of 5-12 volume %.Said seed liquor can be the aqueous solution or the culture medium solution of dry yeast, also can or be purchased the activated seed liquid of bacterial classification for dry yeast.
Employed yeast is fermented in the present invention can be for being purchased yeast solids preparation (such as dried yeast powder) or barms (such as No. 1 yeast of Cuba, No. 2 yeast of Cuba, 4608 yeast).
The method of a certain amount of bacterium liquid through cast or coating after will diluting that be defined as of said zymic colony-forming unit lets unicellular being dispersed in one by one on the culture medium flat plate of mikrobe in it, and after waiting to cultivate, each viable cell just forms a bacterium colony.It is the single celled number that contains in every milliliter of bacterium liquid.
Said zymic colony-forming unit can be measured by means commonly known in the art, such as the methylene blue staining viable bacteria counting method.The concrete grammar of methylene blue staining viable bacteria counting method is following:
1 gram dried yeast powder is dissolved in 10 ml sterile waters, or 1 milliliter of actication of culture liquid is diluted to 10 milliliters with sterilized water, add 0.5 milliliter of 0.1 weight % methylene blue, be incubated 30 minutes down at 35 ℃.Under 10 times of opticmicroscopes,, can get the number of viable bacteria in 1 gram dry yeast or the 1 milliliter of actication of culture liquid, i.e. colony forming single-digit with the number (dead bacterium dyeing, viable bacteria is not dyeed) of viable bacteria in the solution after the blood counting chamber counting insulation.
The temperature of said fermentation can be any temperature that is suitable for yeast growth, is preferably 30-36 ℃, more preferably 32-35 ℃.The pH value is 3.0-5.0, is preferably 3.5-4.5.The time of said fermentation can be for beginning from inoculation to occur to the decline phase of yeast growth the time of (being that fermentation time is that lag phase, logarithmic phase add stationary phase), and the time of preferred fermentation is 25-70 hour, more preferably 25-65 hour.Tunning ethanol can be used conventional method, according to requirement (requiring alcoholic acid purity to reach more than 99% such as the fuel alcohol) separation and refining of different Industrial products, such as distilling, concentrate, dewatering.
The present invention will be described in more detail below in conjunction with embodiment.
Embodiment 1
Present embodiment is used to explain the method for employing preparing ethyl alcohol from sweet sorghum of the present invention.
Gather in fresh sweet sorghum (containing the syrup amount is 70 weight %), and harvested sweet sorghum is bundled into bundle, 20 kilograms of the weight of every bundle of sweet sorghum cut into and are about 4 meters.The sweet sorghum that will be bundled into then bundle lies low, stacked stacking on the ground, and bundled sweet sorghum stacked into the sweet sorghum heap, stack 9 heaps altogether, whenever pile the stacking that sweet sorghum piles and highly be 5 meters, length is 4 meters, width is 4 meters; Distance between the adjacent sweet sorghum heap is 30 centimetres.And in every fresh weight that restrains sweet sorghum; Spray the consumption of the microbicide solution of 5 weight %; On sweet sorghum, evenly spray microbicide solution (said microbicide solution is the mixing solutions of industrial penicillium mould (Harbin Pharmaceutical General Factory provides) and water, and it is 35ppm that the consumption of water makes the concentration of industrial penicillium mould in this sterilant aqueous solution).Store 30 days down at 10 ℃.
From above-mentioned sweet sorghum heap after storing through 30 days, taking out any five bundles of sweet sorghumes ties to send into respectively to tear in the shredding machine (Nanning crin machinery ltd) and separates fragmentation; Obtain the sweet sorghum after the fragmentation; Then the sweet sorghum after the fragmentation is directly sent in the squeezing machine (Zhongxin Heavy Machinery Co) and squeezed the juice; After the filtration, obtain the sweet sorghum syrup respectively.
In the weight of every gram syrup, inoculation 10
5The yeast saccharomyces cerevisiae of colony-forming unit (the super highly active dry yeast in Angel, Hubei Angel Yeast stock company), gained mixture under 32 ℃ in fermentor tank stir culture 65 hours.At 100 ℃ of distillation gained tunnings, the gained distillation fraction can get ethanol at 78.3 ℃ of following second distillations and be respectively 1490.3 grams, 1496.0 grams, 1510.3 grams, 1510.5 grams and 1491.7 grams.Be respectively 7.45%, 7.48%, 7.55%, 7.56% and 7.46% according to the computes alcohol yied, the alcoholic acid average yield is 7.50%.
The fresh weight of sweet sorghum before alcohol yied=100% * ethanol weight/storage
Comparative Examples 1
This Comparative Examples is used to explain the method for the employing preparing ethyl alcohol from sweet sorghum of prior art.
Method according to embodiment 1 adopts preparing ethyl alcohol from sweet sorghum; Different is; The storing mode of sweet sorghum lies low after bundle (every bundle about 20 kilograms) for harvested sweet sorghum is bundled into, stacked stacking on the ground, every bundle of sweet sorghum binds the solid matter row, stacks highly to be 6 meters; Length is 4 meters, and width is 4 meters.Store 30 days down at 10 ℃.
Carry out fragmentation, squeezing from above-mentioned tying according to the method for embodiment 1, after the filtration, obtain syrup respectively through any five bundles of sweet sorghumes of taking-up the sweet sorghum after the storage in 30 days; And the syrup that obtains according to the fermentation of the condition of embodiment 1; Obtain ethanol 1086.2 grams, 1090 grams, 1096 grams, 1088 grams and 1101.8 grams respectively; And calculate ethanol yield according to the formula among the embodiment 1 and be respectively 5.43%, 5.45%, 5.48,5.44% and 5.51, the alcoholic acid average yield is 5.46%.
Embodiment 2
Present embodiment is used to explain the method for employing preparing ethyl alcohol from sweet sorghum of the present invention.
Gather in fresh sweet sorghum (containing the syrup amount is 70 weight %), remove behind the sweet sorghum leaf sweet sorghum is bundled into bundle, about 10 kilograms of the weight of every bundle of sweet sorghum cuts into about 3 meters of length.And in every fresh weight that restrains sweet sorghum; Spray the consumption of the microbicide solution of 2 weight %; Evenly spray microbicide solution (the sterilant aqueous solution of said microbicide solution, in the said sterilant aqueous solution consumption of water to make the concentration of sterilant in this sterilant aqueous solution be 20ppm) in the incision of sweet sorghum for obtaining after 10 weight part Sulfothiorine, 15 weight part quaternary ammonium salt D1221 (two dodecyl dimethyl ammonium chloride), 25 weight part Sodium Benzoates, 25 weight part POTASSIUM SORBATE GRANULAR WHITEs and 25 weight part calcium propionates being mixed the sterilant that obtains and water mixing.The sweet sorghum that will be bundled into then bundle lies low, stacked stacking on the ground, and bundled sweet sorghum stacked into the sweet sorghum heap, stack 9 heaps altogether, whenever pile the stacking that sweet sorghum piles and highly be 3.5 meters, length is 3 meters, width is 3 meters; Distance between the adjacent sweet sorghum heap is 50 centimetres.And on every heap sweet sorghum heap the plastic covering film.Store 30 days down at 5 ℃.
Take out any five bundles of sweet sorghumes in the sweet sorghum of back and send into respectively to tear in the shredding machine (Nanning crin machinery ltd) and separate fragmentation through storing in 30 days above-mentioned; Obtain the sorgo stalk after the fragmentation; Then the sorgo stalk after the fragmentation is sent in the squeezing machine (Zhongxin Heavy Machinery Co) and squeezed the juice; After the filtration, obtain syrup respectively.
In the weight of every gram syrup, inoculation 10
6The yeast saccharomyces cerevisiae of colony-forming unit (the super highly active dry yeast in Angel, Hubei Angel Yeast stock company), gained mixture under 34 ℃ in fermentor tank stir culture 55 hours.At 100 ℃ of distillation gained tunnings, the gained distillation fraction can get ethanol 765.2 grams, 770.3 grams, 768.2 grams, 771.8 grams and 766.3 grams at 78.3 ℃ of following second distillations.According to the computes alcohol yied is 7.65%, 7.70%, 7.68%, 7.72% and 7.66%, and the alcoholic acid average yield is 7.68%.
The fresh weight of sweet sorghum before alcohol yied=100% * ethanol weight/storage
Embodiment 3
Present embodiment is used to explain the method for employing preparing ethyl alcohol from sweet sorghum of the present invention.
Gather in fresh sweet sorghum (containing the syrup amount is 70 weight %), remove behind the sweet sorghum leaf sweet sorghum is bundled into bundle, about 15 kilograms of the weight of every bundle of sweet sorghum cuts into about 2.5 meters of length.And in every fresh weight that restrains sweet sorghum; Spray the consumption of the microbicide solution of 1 weight %; Evenly spray microbicide solution (the sterilant aqueous solution of said microbicide solution, in the said sterilant aqueous solution consumption of water to make the concentration of sterilant in this sterilant aqueous solution be 30ppm) in the incision of sweet sorghum for obtaining after 25 weight part Sulfothiorine, the two decyl dimethyl-brometo de amonios of 10 weight part quaternary ammonium salts, 20 weight part Sodium Benzoates, 25 weight part Sorbic Acids and 20 weight part calcium propionates being mixed the sterilant that obtains and water mixing.The sweet sorghum that will be bundled into then bundle lies low, stacked stacking on the ground, and bundled sweet sorghum stacked into the sweet sorghum heap, stack 6 heaps altogether, whenever pile the stacking that sweet sorghum piles and highly be 2.5 meters, length is 5 meters, width is 3 meters; Distance between the adjacent sweet sorghum heap is 60 centimetres.And on every heap sweet sorghum heap, cover the sweet sorghum leaf.Store 30 days down at 5 ℃.
Send into respectively to tear in the shredding machine (Nanning crin machinery ltd) and separate fragmentation through storing any five bundles of sweet sorghumes of taking-up in the sweet sorghum of back in 30 days above-mentioned; Obtain the sorgo stalk after the fragmentation; Then the sorgo stalk after the fragmentation is sent in the squeezing machine (Zhongxin Heavy Machinery Co) and squeezed the juice; After the filtration, obtain syrup respectively.
In the weight of every gram syrup, inoculation 10
5The yeast saccharomyces cerevisiae of colony-forming unit (the super highly active dry yeast in Angel, Hubei Angel Yeast stock company), gained mixture under 33 ℃ in fermentor tank stir culture 60 hours.At 100 ℃ of distillation gained tunnings, the gained distillation fraction can get ethanol 1144.5 grams, 1145.7 grams, 1152 grams, 1149 grams and 1149 grams at 78.3 ℃ of following second distillations.According to the computes alcohol yied is 7.63%, 7.64%, 7.68%, 7.66% and 7.66%, and the alcoholic acid average yield is 7.66%.
The fresh weight of sweet sorghum before alcohol yied=100% * ethanol weight/storage
Embodiment 4
Present embodiment is used to explain the method for employing preparing ethyl alcohol from sweet sorghum of the present invention.
Gather in fresh sweet sorghum (containing the syrup amount is 70 weight %), remove behind the sweet sorghum leaf sweet sorghum is bundled into bundle, about 25 kilograms of the weight of every bundle of sweet sorghum cuts into about 2 meters of length.And in every fresh weight that restrains sweet sorghum; Spray the consumption of the microbicide solution of 1 weight %; Evenly spray microbicide solution (the sterilant aqueous solution of said microbicide solution, in the said sterilant aqueous solution consumption of water to make the concentration of sterilant in this sterilant aqueous solution be 30ppm) in the incision of sweet sorghum for obtaining after 25 weight part Sulfothiorine, 25 weight part quaternary ammonium salts 1431 (tetradecyl trimethyl ammonium chloride), 50 weight part phenylformic acid being mixed the sterilant that obtains and water mixing.The sweet sorghum that will be bundled into then bundle lies low, stacked stacking on the ground, and bundled sweet sorghum stacked into the sweet sorghum heap, stack 9 heaps altogether, whenever pile the stacking that sweet sorghum piles and highly be 5 meters, length is 4 meters, width is 2 meters; Distance between the adjacent sweet sorghum heap is 40 centimetres.And on every heap sweet sorghum heap, cover the sweet sorghum leaf.Store 30 days down at 5 ℃.
Send into respectively to tear in the shredding machine (Nanning crin machinery ltd) and separate fragmentation through storing any five bundles of sweet sorghumes of taking-up in the sweet sorghum of back in 30 days above-mentioned; Obtain the sorgo stalk after the fragmentation; Then the sorgo stalk after the fragmentation is sent in the squeezing machine (Zhongxin Heavy Machinery Co) and squeezed the juice; After the filtration, obtain syrup respectively.
In the weight of every gram syrup, inoculation 10
5The yeast saccharomyces cerevisiae of colony-forming unit (the super highly active dry yeast in Angel, Hubei Angel Yeast stock company), gained mixture under 33 ℃ in fermentor tank stir culture 60 hours.At 100 ℃ of distillation gained tunnings, the gained distillation fraction can get ethanol 1907.5 grams, 1910 grams, 1912.5 grams, 1905 grams and 1912.5 grams at 78.3 ℃ of following second distillations.According to the computes alcohol yied is 7.63%, 7.64%, 7.65%, 7.62% and 7.65%, and the alcoholic acid average yield is 7.64%.
The fresh weight of sweet sorghum before alcohol yied=100% * ethanol weight/storage
Can find out by The above results; Under all identical prerequisite of other condition; The ethanol yield that adopts the ethanol yield for preparing through the sweet sorghum that stores of the present invention to prepare apparently higher than the sweet sorghum through storing of adopting prior art, explanation thus, method of the present invention can be good at guaranteeing good ventilation effect between the sweet sorghum heap; Reduced the temperature of storage center, also reduced simultaneously by the possibility of bacterium and fungal contamination.In addition, on sweet sorghum, spray microbicide solution, particularly the incision at sorgo stalk sprays microbicide solution; Can further prevent bacterium and fungi infestation; Greatly reduce the loss amount of sweet sorghum sugar in the storage process, therefore, improved ethanol yield greatly.
Claims (8)
1. the method for a preparing ethyl alcohol from sweet sorghum, this method comprise carrying out fragmentation, squeezing through the sweet sorghum that stores, and the sweet sorghum syrup that obtains of fermentation; It is characterized in that the storage method of said sweet sorghum before being included in and stacking is removed the sweet sorghum leaf, with sweet sorghum lie low, stacked being deposited on the bearing surface; Stacking highly is 1-6 rice, and sweet sorghum is stacked many heaps, and the distance between the adjacent sweet sorghum heap is 50-60 centimetre; The length of every heap sweet sorghum heap is 3-10 rice, and width is a 1-5 rice; And on sweet sorghum, spray microbicide solution; Said sterilant contains Sulfothiorine, quaternary ammonium salt and additive; Total amount with said sterilant is a benchmark; The content of said Sulfothiorine is 10-25 weight %, and the content of said quaternary ammonium salt is 5-25 weight %, and said content of additive is 50-70 weight %; Said additive is selected from one or more in phenylformic acid, Sodium Benzoate, calcium propionate, Sorbic Acid, POTASSIUM SORBATE GRANULAR WHITE and the nipagin esters.
2. method according to claim 1, wherein, each sweet sorghum heap comprises that many bundles of sweet sorghumes, the weight of every bundle of sweet sorghum are the 10-25 kilogram, the length of sweet sorghum is 1-4 rice.
3. method according to claim 1, wherein, in the fresh weight of every gram sweet sorghum, the consumption of said microbicide solution is 1-5 weight %, the concentration of sterilant is 10-50ppm in the said microbicide solution.
4. method according to claim 1; Wherein, said microbicide solution is sprayed on the incision of sweet sorghum, in the fresh weight of every gram sweet sorghum; The consumption of said microbicide solution is 0.5-2 weight %, and the concentration of sterilant is 10-50ppm in the said microbicide solution.
5. method according to claim 1, wherein, before fragmentation, the storage time of said sweet sorghum is no more than 150 days, and storing temp is 0-20 ℃.
6. method according to claim 1, wherein, this method also is included on the sweet sorghum of stacking and covers waterproof membrane.
7. method according to claim 6, wherein, said waterproof membrane is plastic film, canvas film or sweet sorghum leaf.
8. method according to claim 1, wherein, the method for the sweet sorghum syrup that fermentation obtains comprises mixes yeast with the sweet sorghum syrup, and in every gram sweet sorghum syrup, the employed zymic inoculum size of fermenting is 10
3-10
8Colony-forming unit, the temperature of said fermentation are 30-36 ℃, and the time of fermentation is 25-70 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103046473A CN101469335B (en) | 2007-12-28 | 2007-12-28 | Method for preparing ethyl alcohol from sweet sorghum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103046473A CN101469335B (en) | 2007-12-28 | 2007-12-28 | Method for preparing ethyl alcohol from sweet sorghum |
Publications (2)
| Publication Number | Publication Date |
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| CN101469335A CN101469335A (en) | 2009-07-01 |
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| CN102246640A (en) * | 2011-06-03 | 2011-11-23 | 中兴能源(内蒙古)有限公司 | Storage method for reducing sugar loss of sweet sorghum stems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4613339A (en) * | 1984-12-24 | 1986-09-23 | Gunnerman Rudolf W | Process for preparing and using sweet sorghum in a fuel product |
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| US4613339A (en) * | 1984-12-24 | 1986-09-23 | Gunnerman Rudolf W | Process for preparing and using sweet sorghum in a fuel product |
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| Title |
|---|
| 刘莉 孙君社 康利平 刘萍.甜高粱茎秆生产燃料乙醇.《化学进展》.2007,第19卷(第7/8期),1100-1111. * |
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