CN109762851A - A kind of method of paddy processing production alcohol fuel and by-product rice DDGS - Google Patents
A kind of method of paddy processing production alcohol fuel and by-product rice DDGS Download PDFInfo
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- CN109762851A CN109762851A CN201811607687.XA CN201811607687A CN109762851A CN 109762851 A CN109762851 A CN 109762851A CN 201811607687 A CN201811607687 A CN 201811607687A CN 109762851 A CN109762851 A CN 109762851A
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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
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Abstract
Alcohol fuel and the method for by-product rice DDGS are produced by Raw material processing of paddy the present invention relates to a kind of, the described method comprises the following steps: (1) paddy comminution pretreatment；(2) liquefied fermented glutinous rice is prepared；(3) yeast wash is prepared；(4) fermenting-ripening wine with dregs is prepared；(5) alcohol fuel is prepared；(6) rice DDGS is prepared.Volume fraction of ethanol in the product alcohol fuel obtained by method of the invention is high, and quality meets standard GB/T 18350-2013 " fuel ethanol "；In addition, the testing result of the mycotoxin in by-product rice DDGS is lower than limit standard, and protein content is high.Therefore, the present invention realizes the industrialized production of paddy processing alcohol fuel and by-product rice DDGS, it avoids harmful fungoid toxin to enter food Chain System and the risk that causes the mycotoxin in DDGS exceeded and improve the protein content in DDGS, substantially increases the comprehensive utilization value of paddy.
Description
Technical field
The present invention relates to fuel ethanol production fields, and in particular to a kind of paddy processing production alcohol fuel and by-product are big
The method of rice distiller's dried grain and its soluble matter (Distillers Dried Grains with Solubles, abbreviation DDGS).
Background technique
In recent years, as following one of the alternative fuel, the demand of ethyl alcohol is increasingly with the aggravation of energy crisis
Greatly.Alcohol fuel is as a kind of reproducible green clean energy resource, if being mixed to by 10% additive amount with gasoline automobile-used
Ethanol petrol, to alleviating, the harmful substance that fossil energy is nervous, effectively reduces carbon emission, is greatly reduced in vehicle exhaust is dirty
Dye, protection environment etc. have a very important role.Currently, China's alcohol fuel yield is about annual 2600000 tons, fired in the whole world
Expect only accounting 3% in ethanol production, ranks third, it is obvious with the U.S. for coming front two and Brazilian yield gap.And China
Alcohol fuel dosage only accounts for the 2.1% of gasoline dosage, and therefore, the development space for producing alcohol fuel is huge.
Currently, the production of alcohol fuel mainly uses cereal, potato, molasses for raw material, wherein cereal generallys use jade
Rice, wheat, rice etc..In these cereals starchy materials, corn usually as the main source of alcohol fuel, be by
15-20% or so is only accounted in the part of the real human consumption of corn, therefore the alcohol fuel produced using corn as raw material accounts for about
The 48% of national alcohol fuel annual output.As the by-product of production alcohol fuel, DDGS refers to dry containing soluble solids
Vinasse.Since the protein content of DDGS is higher (generally in 26wt% or more), it has also become domestic and international Feedstuff Enterprises are extensive
A kind of novel protein feed raw material of application.In recent years, China surges to the import of DDGS, becomes U.S. export DDGS within 2010
The first big country.And method the popularizing in the whole nation with corn as raw material production alcohol fuel, the yield of China DDGS
Accordingly increase therewith.For example, patent document CN 108374024A discloses a kind of sweet Chinese sorghum pole and maize multiple product ethyl alcohol, fruit
The method of sugared and a variety of byproducts.However, using corn as raw material when, produce alcohol fuel technique in DDGS there are many
The mycotoxin problem of high-content is the maximum obstruction that the self-produced DDGS of China is used as feedstuff in problem, especially corn.
In addition, being passed through for the method that biogas residue and biogas liquid is used as organic fertilizer is made in the exceeded vinasse of mycotoxin in above patent document
It crosses after a series for the treatment of processes, mycotoxin is returned in crops body, causes secondary pollution.Therefore, actually it is not
Mycotoxin levels effectively in control corn DDGS, are only to be used to be converted into other by-products for the exceeded vinasse of mycotoxin
Object.
South China is to plant based on paddy.In paddy, semilate rice and late rice provide grain ration and edible market, and early rice is due to tool
There is the characteristics of low water content, storage endurance, is commonly used for deposit grain.It is counted according to related data, national paddy total output is 2 within 2017
Hundred million tons, it is contemplated that unspent amount is 0.2 hundred million tons, and inventory's surplus is still in a high position.In addition, the content of starch in rice is in 70-80wt%
Between, the content of starch of corn is about 73.2wt%, it is seen that the content of starch in rice is also sufficient for production alcohol fuel
Demand.Therefore, it equally can yet be regarded as a kind of scientific and rational solution using paddy processing production alcohol fuel, have very
Great development significance.
Rice is the seed of rice, is paddy manufactured grain after the processes such as decladding, cleaning, husking, husk rice, finished product arrangement
Food.Although rice equally can be used to produce alcohol fuel, and can produce good by-product DDGS, produced by paddy big
It is still needed to when rice by multiple process, not only increasing process costs also will cause food resource waste etc..Further, since paddy grain
The protein of outer layer is high compared with inner layer content, therefore the protein content of rice is 7-8wt%, and the protein content of paddy is then about
For 9.5wt%, it is usually used in producing the protein content of the corn of alcohol fuel being about 8.5wt%.Therefore, pass through rice and corn
Protein content in the DDGS of production is far away from paddy.As it can be seen that producing alcohol fuel and by-product rice by raw material of paddy
DDGS will be with fairly obvious advantage.
Summary of the invention
The present invention provides the method for a kind of paddy processing production alcohol fuel and by-product rice DDGS, the method exists
Efficiently while production alcohol fuel, moreover it is possible to overcome the above-mentioned technical problem of corn DDGS.Paddy processing of the invention produces combustion
Expect the method for ethyl alcohol and its by-product rice DDGS the following steps are included:
(1) paddy comminution pretreatment: removing impurity for paddy, crush through pulverizer, and the paddy meal of 25 mesh screens is obtained；
(2) it prepares liquefied fermented glutinous rice: paddy meal and water is formed into slurry after mixing, adjusting pH is 5.2-5.5, adds high temperature
Amylase, the slurry are preheated to 53-55 DEG C in slurry tank, enter boiling after high-temperature steam injection liquefaction and maintain tank,
It is 95-97 DEG C that boiling, which maintains temperature in tank, is down to 85-87 DEG C using temperature after vacuum flash, liquefies into liquefied pot, liquefaction
After, it is cooled to 65-75 DEG C by vacuum flash, 31-32 DEG C is cooled to using heat exchanger, obtains liquefied fermented glutinous rice；
(3) it prepares yeast wash: liquefied fermented glutinous rice, water and distiller's yeast being added in activation pot, is passed through filtrated air, passes through external heat exchange
It is 34-36 DEG C that device, which maintains activation temperature, and distiller's yeast Hydration Activation forms activating solution；The activating solution is passed through the wine equipped with liquefied fermented glutinous rice
In female tank, it is passed through filtrated air, is spread cultivation 28-30 DEG C of temperature by external heat exchanger maintenance, distiller's yeast is numerous rapidly under aerobic conditions
It grows to distiller's yeast number and reaches 2.5 hundred million/mL or more, obtain yeast wash；
(4) it prepares fermenting-ripening wine with dregs: remaining liquefied fermented glutinous rice is added in fermentor, adjusting pH value is 4.2-4.4, is added simultaneously
Add high-effective glucoamylase, urea；Yeast wash is added into fermentor with the inoculum concentration of 15-20% (v/v), is being sent out under anaerobic
It ferments in fermentation tank, obtains fermenting-ripening wine with dregs；
(5) prepare alcohol fuel: fermenting-ripening wine with dregs enters Distallation systm after preheating, produces from the Distallation systm
Alcohol steam enters molecular sieve system after superheater, and dehydrated cooled obtains anhydrous alcohol fuel；
(6) prepare rice DDGS: the useless mash of Distallation systm is separated by filtration to obtain clear liquid and wet grain, and the clear liquid is steamed
Hair is concentrated to get clear liquid concentrate, and it is dry that the wet grain is mixed into drying machine with the clear liquid concentrate again after drying
Afterwards to get arrive rice DDGS.
Beneficial effect
The method of paddy processing production alcohol fuel and by-product rice DDGS of the present invention is made by using paddy
Alcohol fuel and rice DDGS are produced for raw material, produces many advantageous effects:
1. use grain in storage for years for raw material, on the one hand avoids grain in storage for years and flow into grain market and bring food-safety problem
And the utilization rate of grain in storage for years is significantly increased, reduce waste；On the other hand, the ethyl alcohol in the alcohol fuel for guaranteeing production is pure
In the case where degree, there is obviously price advantage compared to corn using grain in storage for years as raw material, production cost reduces about than corn
17%, improve the economic benefit and profit of enterprise.
2. the protein content of the by-product rice DDGS of production is higher than corn DDGS, and contains good full price egg
White, above-mentioned albumen is the mixture of rice protein Yu distiller's yeast albumen, and is the high-quality protein of no anaphylactogen.
3. spraying liquefaction technology using steam when preparing liquefied fermented glutinous rice, in combination with technological means such as flash distillation coolings, realize
It is energy-optimised, it not only ensure that the effect of the liquefaction of starch and simultaneous saccharification and fermentation in grain in storage for years, but also reduce energy consumption and equipment
Cost of investment.
4. making paddy be ground into short grained paddy meal using pulverizer, avoid due to large granular materials (especially not
The rice husk crushed completely) caused by pipeline and the problems such as equipment attrition, blocking pipeline, while improving the utilization rate of rice husk.
Detailed description of the invention
Fig. 1 is the embodiment party that paddy processing of the present invention produces alcohol fuel and by-product rice DDGS method
The process flow chart of formula.
Specific embodiment
The present invention is intended to provide a kind of method of paddy processing production alcohol fuel and by-product rice DDGS, the method
While guaranteeing efficiently production alcohol fuel, moreover it is possible to produce more good rice DDGS, improve the utilization of grain in storage for years
Rate.
Paddy is generally divided into new grain, grain in storage for years and grain in storage for years.Typically, the paddy of current year's production is new grain, is stored up for the first time
Depositing the paddy that the time limit is more than 1 year is grain in storage for years, and storage time is grain in storage for years in 3 years or more paddy.Rotten paddy is after storage
Grain in storage for years.Paddy is influenced during storage by microorganism and storage condition, and a series of physiology itself can occur and become
Change, often generates heat, go mouldy, sprout.Grain in storage for years cannot function as grain ration food since nutrition and edible value are remarkably decreased
With.
Raw material using paddy as production alcohol fuel and rice DDGS in the present invention, and newly grain, grain in storage for years and old
Changing grain can be used as raw material utilization.Typically, the storage time of paddy is shorter, and mycotoxin levels are lower, obtained rice
The quality of DDGS is higher (i.e. mycotoxin levels are lower), however the paddy of short term stored is used to be easy to cause food unrestrained
Take.Therefore, it is preferable to use cannot be directly as the grain in storage for years of grain ration in the present invention.In addition, inventors have found that even if in this hair
Grain in storage for years is used in the bright method, the quality of obtained rice DDGS is also usually than the corn DDGS using maize production
Quality it is high.
In the present invention, the quality of DDGS is determined by its protein content and mycotoxin levels.Protein content is got over
Height, mycotoxin levels are lower, then the quality of DDGS is higher.Most important mycotoxin includes vomitoxin, corn in DDGS
Zeranol, aflatoxin B1With ochratoxin etc..Compare other mycotoxins, vomitoxin and zearalenone
Content is higher, and its toxicity is also relatively strong.Zearalenone is widely present in some cereal crops, as corn, sorghum and
In wheat etc., especially corn and its by-product, content is relatively high.Zearalenone can cause DDGS itself very strong
Pollution, to cause to seriously endanger to animal body, mainly due to it with very strong genotoxicity and Teratogenesis toxicity, will affect
Animals' reproduction performance reduces growth performance, causes immunosupress and cause cellular damage etc., so that animal health is endangered, to poultry
Animal husbandry brings huge economic loss, therefore DDGS feed should primarily avoid the pollution of zearalenone.Vomitoxin is one
The extremely common mycotoxin of kind, it is lower that toxicity compares zearalenone, but it equally has very strong poison to humans and animals
Property, vomitoxin can cause the vomiting reaction of many animals, and serious person can cause death.In addition, vomitoxin chemical property is steady
It is fixed, it will not generally be destroyed in processing, storage and gastronomical process, can store for a long time keep virulence not in laboratory conditions
Become, there is stronger thermal resistance, therefore is easy to accumulate in animal body, and then in the internal product of the people in food chain end
It is tired, cause various food poisoning phenomenons.
In one embodiment, method of the present invention is using grain in storage for years as a raw material for production, it is preferable to use storage
It is limited to the grain in storage for years of 3-5 year, is further preferably limited to the grain in storage for years of 3-4 year using storage.The grain in storage for years of the above-mentioned time limit, by
It is too long in storage time and cannot function as grain ration, and mycotoxin levels are relatively low (especially zearalenone), from
Mycotoxin is avoided on source enters the harm of food chain bring.
In a preferred embodiment, before paddy comminution pretreatment, method of the invention may also include to paddy original
The step of material is detected, is screened, to ensure that mycotoxin levels are strict controlled in limit standard.In addition, paddy raw material
Detection method is not particularly restricted, for example, can pass through high performance liquid chromatography or other feasible detection means.It is logical
Often, under identical condition of storage, the storage time of paddy is longer, and mycotoxin levels are higher.Therefore, in the present invention, root
It chooses whether to detect paddy raw material according to the storage time limit of grain in storage for years, screen, it is preferable that for the grain in storage for years of 3-4
Can without detection, screening and directly as raw material come using；5 years or 5 years or more grains in storage for years are preferably crushed in paddy pre-
Before processing, it is first detected, is screened.
As long as the impurity in paddy can be removed, go deimpurity method not particularly restricted paddy in step (1),
And different impurity also can be used different minimizing technologies.Impurity in paddy can be different according to the source of paddy,
These usual impurity do not have any benefit for production alcohol fuel and DDGS and will affect production.In the present invention, these are miscellaneous
Matter be, for example, be easy to equipment or pipeline cause abrasion adamant (such as sandstone, ironware and/or other unknown adamants) and
It is not easy the braided fabric crushed.In one embodiment, in step (1), paddy preferably first passes through specific-gravity stoner except shakeout
The impurity such as stone, then the impurity such as ironware are removed by electric magnetic iron remover, the impurity such as braided fabric are removed finally by roller classifying screen.Through
Paddy can be used directly as paddy meal under the sieve of roller classifying screen.It will be crushed as paddy on the sieve of roller classifying screen,
Obtain paddy meal.As long as the method that paddy crushes is not also by special in addition, can will sieve upper paddy is crushed to required grain diameter
Restriction the beater grinder for being adjustable grinding particle size for example can be used.Paddy and the upper rice of sieve under the sieve of roller classifying screen
The smashed paddy meal grain diameter of paddy was preferably 25 mesh screens.By the paddy meal of above-mentioned grain diameter and the abundant powder of rice husk
It is broken, abrasion of the large granular materials to pipeline and equipment is avoided, and not will cause line clogging.
In one embodiment, in step (1), paddy meal can further by separator by paddy meal and partial size compared with
The separation of the impurity such as small dust, and isolated method is not particularly restricted, for example, such as can pass through cyclone separator
It is isolated.
In one embodiment, in step (2), the spice ratio of paddy meal and water is 1:1.9-1:2.1, preferably 1:
2.After paddy meal and water are mixed to form slurry, with sulphur acid for adjusting pH to 5.2-5.5, preferably adjusting pH to 5.3；Slurry dry matter
Concentration is controlled in 27-29wt%, preferably 28wt%；Relative to the quality of paddy raw material, the additive amount of alpha-amylase is
0.3kg/t.Then, slurry is preheated to 53-55 DEG C, preferably 55 DEG C in slurry tank.
In the present invention, in step (2), liquefaction process is sprayed using steam, high-temperature steam is filled with rice starch particle
Tap touching, keeps its loosely organized, and thoroughly, gelatinization sufficiently, is conducive to the hydrolysis of amylase for starch molecule expansion.
In the present invention, in step (2), vacuum flash is carried out 2 times.Temperature declines 6-8 DEG C after first time vacuum flash,
The quick variation of temperature and pressure makes the further swelling fracture little particle of starch molecule, to make contact of the enzyme with starch granules
More sufficiently.Secondary vacuum flash is carried out after liquefaction, reduces the use of heat exchanger and cooling water, energy saving.
In the present invention, in step (2), as long as can be by the starch liquefacation in paddy, when liquefaction in liquefied pot
Between it is not particularly restricted.In one embodiment, the liquefying time in liquefied pot is 140-160min, preferably
150min。
In one embodiment, in step (3), distiller's yeast activation pot activation temperature be 34-36 DEG C, preferably 35
℃.After activating solution is passed through distiller's yeast tank, the rapid mass propagation of distiller's yeast generates heat, by external heat exchanger by heat with dimension
The temperature that spreads cultivation for holding distiller's yeast is 28-30 DEG C, preferably 29 DEG C.
In the present invention, in step (3), as long as distiller's yeast, which can spread cultivation, reaches 2.5 hundred million/mL or more, wine to distiller's yeast number
Spread cultivation time of the mother in distiller's yeast tank is not particularly restricted.In one embodiment, in step (3), distiller's yeast is in distiller's yeast
The time that spreads cultivation in tank is 12-18h, preferably 15h.
In one embodiment, in step (4), use sulfuric acid by remaining liquefied fermented glutinous rice adjusting pH value for 4.2-4.4, it is excellent
It is selected as 4.3.
In one embodiment, in step (4), by yeast wash with 15-20%'s (v/v), preferably 15% (v/v)
Inoculum concentration is seeded in fermentor.
In the present invention, in step (4), the zymotechnique of distiller's yeast and time is not particularly restricted.Implement at one
In mode, zymotechnique is simultaneous saccharification and fermentation technique, and simultaneous saccharification and fermentation technique is intermittently operated.Specifically,
In the fermentation process of the intermittently operated, in preceding 8h, 28-31.5 DEG C of fermentation temperature of control, preferably 30 DEG C；After 8h, control hair
32.5-33.5 DEG C of ferment temperature, preferably 33 DEG C, fermentation to 60h terminates.
In one preferred embodiment, the fermentor addition in the distiller's yeast tank in step (3) and step (4) is inorganic
Nitrogen source, to improve the proliferation efficiency and liquor-producing ability of distiller's yeast.Inorganic nitrogen-sourced type as addition is not particularly restricted, and one
As one of for ammonium salt class, such as ammonium sulfate, ammonium nitrate and ammonium chloride can be enumerated etc., it is in a preferred embodiment, inorganic
Nitrogen source is ammonium sulfate.
In one embodiment, the carbon dioxide gas that the fermentor in the distiller's yeast tank and step (4) in step (3) generates
Body is vented to atmosphere after washing in scrubbing tower, can enter in the Distallation systm of step (5) and be divided after cleaning solution is recovered
From to separate ethyl alcohol wherein included.
In the present invention, in step (5), as long as alcohol fuel can be separated from fermenting-ripening wine with dregs, Distallation systm
Not by particular determination.It being formed according to the solid-liquid of fermenting-ripening wine with dregs, preferably Distallation systm successively includes topping still and rectifying column, and
And the combination and the number of plates of topping still and rectifying column can carry out any adjustment according to the actual situation.Wherein, topping still is
Alcohol fuel in fermenting-ripening wine with dregs is separated from fermenting-ripening wine with dregs in the form of alcohol steam, rectifying column is further to drop
Water vapour content in low alcohol steam.In one embodiment, Distallation systm successively include topping still, first rectifying column and
Second distillation column.In addition, the Distallation systm uses thermal coupling, wherein first rectifying column uses fresh direct steam as heat
Source, first rectifying column tower overhead gas is as Second distillation column heat source, and Second distillation column tower overhead gas is as topping still heat source, steam consumption
Amount is few, and energy consumption reduces.Fermenting-ripening wine with dregs enters topping still after three-level preheating reaches 60 DEG C, and wherein the heat source of level-one preheating is
Topping still tower overhead gas, the heat source of second level preheating are topping still side take-off gas phase, and the heat source of three-level preheating is molecular sieve system
Finished product fume, therefore do not need additional steam consumption.In addition, first rectifying column tower bottom kettle liquid and Second distillation column tower bottom kettle liquid
In be practically free of alcohol fuel, can be used each independently as the spice water or water for cleaning of slurry, or and topping still
Tower bottom kettle liquid is mixed to form the useless mash of Distallation systm, has saved the consumption of water.
In one embodiment, the volume fraction of the alcohol fuel steam in the alcohol steam of Distallation systm extraction is preferred
For 92-95%.
In one embodiment, the molecular sieve system in step (5) is made of adsorption tower and desorption column, and the two can be achieved
It automatically controls, switching.The alcohol steam of Distallation systm extraction enters adsorption tower after superheater, obtains after adsorption tower is dehydrated
Finished product fume obtains anhydrous alcohol fuel after finished wine air cooling.At the same time, desorption column passes through backwash, vacuumizes regeneration,
Two tower interworkings.The recoil light wine comprising a small amount of alcohol fuel that comes out enters thin alcohol recovery tank, is recycled to Distallation systm, keeps away
The waste for exempting from alcohol fuel improves the yield and yield of alcohol fuel.
In the present invention, the useless mash of the Distallation systm in step (6) refers to fermenting-ripening wine with dregs after Distallation systm is fractionated
Obtained liquid phase mixture.In the embodiment that Distallation systm includes topping still and rectifying column, the useless mash of Distallation systm by
Topping still tower bottom kettle liquid and partial rectification tower tower bottom kettle liquid composition.Wherein, the solid content in the tower bottom kettle liquid of topping still is high, packet
The solid content for constituting rice DDGS is contained；And the solid content in the kettle liquid of rectifying tower bottom is extremely low, is mainly used for diluting topping still
Tower bottom kettle liquid.
In step (6), as long as the useless mash of Distallation systm can be separated into clear liquid and wet sump, isolated mode is not
It is particularly restricted, such as plate and frame filter press or horizontal spiral seperator can be enumerated.In one embodiment, in step (6)
In, the solid content in wet sump obtained after separation is 36-38wt%, and clear liquid solid content is 4-5wt%.Clear liquid warp
Pervaporation is concentrated to get clear liquid concentrate, solid content 32-35wt%.
In step (6), as long as side that can be dry by the mixture of wet sump and wet sump and clear liquid concentrate, dry
Formula is not particularly restricted, such as can pass through roller drier, pipe bundle drier etc..In one embodiment, wet grain passes through
Screw conveyor enters roller drier, and the dry grain that roller drier generates enters pipe bundle drier by screw conveyor, together
Shi Tianjia clear liquid concentrate obtains the rice DDGS that moisture content is less than 10wt% after pipe bundle drier is dry.
In the present invention, as long as liquefied pot, activation pot and distiller's yeast tank can be made to maintain its corresponding temperature, external heat exchange
The type of device is not particularly restricted.In the present invention, external heat exchanger is preferably external plate heat exchanger.
In the present invention, in order to avoid the pipeline as caused by large granular materials and equipment attrition, blocking pipeline the problems such as,
The selections such as vibrating screen mesh, pipeline used in the present invention, plate heat exchanger, column plate material have more the low conjunction of toughness and wearability
Golden structural steel replaces carbon steel, Stainless steel 316 L, to extend equipment life and reduce maintenance cost.
Embodiment
Exemplary embodiments of the present invention are described below, those skilled in the art are it will be obvious that following implementation
Mode is not intended to limit only certain exemplary embodiments of this invention, it is thus understood that including in the spirit and scope of the present invention all variants,
Equivalent or substitute.A variety of adjustment and other embodiment are expected in the limit of power of those of ordinary skill in the art
It falls within the scope of the present invention.
Reagent as used in the following examples, material etc., unless otherwise specified, commercially buy.
Detection, the screening of paddy raw material
Paddy is used in method of the present invention as raw material to prepare alcohol fuel and rice DDGS.In order to guarantee
The quality and yield of rice DDGS extracts a certain number of grain in storage for years samples, using high performance liquid chromatograph (Agilent
1200) mycotoxin in the grain in storage for years and corn of the different storage time limits is detected.Table 1 shows corn and different storages
Mycotoxin levels and four kinds of mycotoxin limit standards in the grain in storage for years of the time limit, wherein vomitoxin limit standard comes
From GB 2761-2011, other mycotoxin limit standards come from GB/T 25866-2010.
Mycotoxin levels in 1 corn of table and grain in storage for years
*: total content refers to the total content of four kinds of mycotoxins
As it can be seen that as shown in Table 1, the total content of four kinds of mycotoxins in corn is 916ppb, and storage time is 3-5
Grain in storage for years in four kinds of mycotoxins total content be 450-959ppb.In addition, there are relatively high corn is red in corn
Mould ketenes, therefore, present invention preferably employs the grains in storage for years that storage is limited to 3-5 year, are more preferably limited to 3-4's in year using storage
Grain in storage for years.
Embodiment 1
(1) paddy comminution pretreatment: will storage be limited in year 3 years grains in storage for years successively pass through specific-gravity stoner (model:
TQSF200), electric magnetic iron remover (model: RCDB), roller classifying screen (model: GS1530), to remove sandstone, ironware, braided fabric
Equal impurity.The a part of paddy of the paddy after grit water separator as paddy meal under the sieve of roller classifying screen, paddy on sieve
It is further crushed by beater grinder (model: PC-0604), sieve lower paddy and sieves the upper smashed paddy meal particle of paddy
Diameter was 25 mesh screens, after being mixed, separates material with impurity such as dust by CZT type cyclone separator, is obtained 25
The paddy meal of mesh screen.
(2) it prepares liquefied fermented glutinous rice: paddy meal and water being formed into slurry after mixing, wherein the material-water ratio of paddy meal is 1:
2, with sulphur acid for adjusting pH to 5.3, controlling slurry dry substance concentration is 28%, relative to the quality of paddy raw material, adds high temperature and forms sediment
Powder enzyme (believes) 0.3kg/t from Novi.After being preheated to 55 DEG C in slurry tank, steam liquefied spray is entered with charging rate 100t/h
Emitter (model: HYW-D), slurry enter boiling after the injection liquefaction of steam liquefied injector and maintain tank, and boiling maintains temperature in tank
Degree is 95 DEG C.86 DEG C are down to using temperature after vacuum flash, into liquefied pot liquefaction 150min, after liquefaction, is first passed through
Vacuum flash is cooled to 70 DEG C, is cooled to 32 DEG C using plate heat exchanger, obtains liquefied fermented glutinous rice.
(3) it prepares yeast wash: liquefied fermented glutinous rice, water and distiller's yeast being added in activation pot, the mass ratio of three is 10:5:1, is passed through
Filtrated air, maintaining activation temperature by external plate heat exchanger is 35 DEG C, and distiller's yeast Hydration Activation forms activating solution.Activating solution with
It is passed through to the distiller's yeast tank equipped with liquefied fermented glutinous rice afterwards, wherein the mass ratio of activating solution and liquefied fermented glutinous rice is 1:9, it is passed through filtrated air, to
The ammonium sulfate of 3kg/t is added in yeast tank as inorganic nitrogen-sourced.Under aerobic conditions, the rapid mass propagation of distiller's yeast, and generate heat
Amount, is taken away heat by the outer loop of external plate heat exchanger, and maintenance spreads cultivation 29 DEG C of temperature.After cultivating 15h, distiller's yeast number reaches
2.5 hundred million/mL or more obtains yeast wash.
(4) it prepares fermenting-ripening wine with dregs: remaining liquefied fermented glutinous rice is added in fermentor, and add sulphur acid for adjusting pH to 4.3, phase
For the quality of paddy raw material, adds high-effective glucoamylase and (believe) 2.14kg/t, urea 1.02kg/t, ammonium sulfate 8kg/ from Novi
t.In fermentor, yeast wash is added with the inoculum concentration of 15% (v/v), is carried out using the simultaneous saccharification and fermentation technique of intermittently operated
Fermentation.In fermentation process, preceding 8h control fermentation temperature is 30 DEG C, and controlled at 33 DEG C after 8h, fermentation is tied after carrying out 60h
Beam obtains fermenting-ripening wine with dregs.
(5) prepare alcohol fuel: Distallation systm is made of topping still, first rectifying column and Second distillation column.Fermenting-ripening
By three-level preheating, (wherein the heat source of level-one preheating is topping still tower overhead gas to wine with dregs, and the heat source of second level preheating is that topping still side line is adopted
Gas phase out, three-level preheating heat source be molecular sieve system finished product fume) reach 60 DEG C after, with 100m3/ h inlet amount successively into
Enter topping still, first rectifying column and Second distillation column, wherein the number of plates difference of topping still, first rectifying column and Second distillation column
It is 32,9 and 32.First rectifying column is using fresh direct steam as heat source, and first rectifying column tower overhead gas is as the second rectifying
Tower heat source, Second distillation column tower overhead gas is as topping still heat source.First rectifying column tower bottom kettle liquid is used as the spice in step (2)
Water uses.Produce 93% (v/v) alcohol steam at the top of Second distillation column, alcohol steam enter after superheater by adsorption tower and
The molecular sieve system of desorption column composition.Alcohol steam obtains finished product fume after adsorption tower is dehydrated, then obtains 14m after cooling3/
The anhydrous alcohol fuel of h, desorption column is by backwashing, vacuumizing regeneration, two tower interworkings.Desorption column recoil is washed out comprising few
The light wine of amount alcohol fuel enters thin alcohol recovery tank, is recycled to first rectifying column.
(6) prepare rice DDGS: topping still tower bottom kettle liquid and Second distillation column tower bottom kettle liquid are mixed to form Distallation systm
Useless mash, useless mash isolate clear liquid and wet grain by plate and frame filter press.Wherein, wet poor solid content is 36wt%, clear liquid
Solid content is 4wt%.Clear liquid obtains clear liquid concentrate, solid content 32wt% by evaporation and concentration.Wet grain is logical
It crosses screw conveyor and enters roller drier, the dry grain that roller drier generates enters pipe bundle drier by screw conveyor,
Clear liquid concentrate is added simultaneously, the rice DDGS that moisture content is 8wt% is obtained after pipe bundle drier is dry.
Embodiment 2
(1) paddy comminution pretreatment: will storage be limited in year 4 years grains in storage for years successively pass through specific-gravity stoner (model:
TQSF200), electric magnetic iron remover (model: RCDB), roller classifying screen (model: GS1530), to remove sandstone, ironware, braided fabric
Equal impurity.The a part of paddy of the paddy after grit water separator as paddy meal under the sieve of roller classifying screen, paddy on sieve
It is further crushed by beater grinder (model: PC-0604), sieve lower paddy and sieves the upper smashed paddy meal particle of paddy
Diameter was 25 mesh screens, after being mixed, separates material with impurity such as dust by CZT type cyclone separator, is obtained 25
The paddy meal of mesh screen.
(2) it prepares liquefied fermented glutinous rice: paddy meal and water being formed into slurry after mixing, wherein the material-water ratio of paddy meal is 1:
2, with sulphur acid for adjusting pH to 5.3, control slurry dry substance concentration is 28wt%, relative to the quality of slurry, adds high-temperature starch
Enzyme (believes) 0.3kg/t from Novi.After being preheated to 55 DEG C in slurry tank, steam liquefied injection is entered with charging rate 100t/h
Device (model: HYW-D), slurry enter boiling after the injection liquefaction of steam liquefied injector and maintain tank, and boiling maintains temperature in tank
It is 95 DEG C.86 DEG C are down to using temperature after liquefaction vacuum flash, into liquefied pot liquefaction 150min, after liquefaction, is first passed through
It crosses flash distillation and is cooled to 70 DEG C, be cooled to 32 DEG C using plate heat exchanger, obtain liquefied fermented glutinous rice.
(3) it prepares yeast wash: liquefied fermented glutinous rice, water and distiller's yeast being added in activation pot, the mass ratio of three is 10:5:1, is passed through
Filtrated air maintains 35 DEG C of activation temperature by external plate heat exchanger, and distiller's yeast Hydration Activation forms activating solution.Activating solution is subsequent
It is passed through to the distiller's yeast tank equipped with liquefied fermented glutinous rice, wherein the mass ratio of activating solution and liquefied fermented glutinous rice is 1:9, filtrated air is passed through, to ferment
The ammonium sulfate of 3kg/t is added in female tank as inorganic nitrogen-sourced.Under aerobic conditions, the rapid mass propagation of distiller's yeast, and heat is generated,
Heat is taken away by the outer loop of external plate heat exchanger, maintenance spreads cultivation 29 DEG C of temperature.After cultivating 15h, distiller's yeast number is up to 2.5
Hundred million/mL or more obtains yeast wash.
(4) it prepares fermenting-ripening wine with dregs: remaining liquefied fermented glutinous rice is added in fermentor, and add sulphur acid for adjusting pH to 4.3, phase
For the quality of remaining liquefied fermented glutinous rice, adds high-effective glucoamylase and (believe) 2.14kg/t, urea 1.02kg/t, ammonium sulfate from Novi
8kg/t.In fermentor, yeast wash is added with the inoculum concentration of 15% (v/v), using the simultaneous saccharification and fermentation technique of intermittently operated
It ferments.In fermentation process, preceding 8h control fermentation temperature is 30 DEG C, and controlled at 33 DEG C after 8h, fermentation carries out 60h
Afterwards, terminate to obtain fermenting-ripening wine with dregs.
(5) prepare alcohol fuel: Distallation systm is made of topping still, first rectifying column and Second distillation column.Fermenting-ripening
By three-level preheating, (wherein the heat source of level-one preheating is topping still tower overhead gas to wine with dregs, and the heat source of second level preheating is that topping still side line is adopted
Gas phase out, three-level preheating heat source be molecular sieve system finished product fume) reach 60 DEG C after, with 100m3/ h inlet amount successively into
Enter topping still, first rectifying column and Second distillation column, wherein the number of plates difference of topping still, first rectifying column and Second distillation column
It is 32,9 and 32.First rectifying column is using fresh direct steam as heat source, and first rectifying column tower overhead gas is as the second rectifying
Tower heat source, Second distillation column tower overhead gas is as topping still heat source.First rectifying column tower bottom kettle liquid is used as the spice in step (2)
Water water uses.93% (v/v) alcohol steam is produced at the top of Second distillation column, alcohol steam enters after superheater by adsorption tower
With the molecular sieve system of desorption column composition.Alcohol steam obtains finished product fume after adsorption tower is dehydrated, then obtains 14m after cooling down3/
The anhydrous alcohol fuel of h, desorption column is by backwashing, vacuumizing regeneration, two tower interworkings.Desorption column recoil is washed out comprising few
The light wine of amount alcohol fuel enters thin alcohol recovery tank, is recycled to first rectifying column.
(6) prepare rice DDGS: topping still tower bottom kettle liquid and Second distillation column tower bottom kettle liquid are mixed to form Distallation systm
Useless mash, useless mash isolate clear liquid and wet grain by flame filter press.Wherein, wet poor solid content is 37wt%, clear liquid
Solid content is 5wt%.Clear liquid obtains clear liquid concentrate, solid content 34wt% by evaporation and concentration.Wet grain is logical
It crosses screw conveyor and enters roller drier, the dry grain that roller drier generates enters pipe bundle drier by screw conveyor,
Clear liquid concentrate is added simultaneously, the rice DDGS that moisture content is 9wt% is obtained after pipe bundle drier is dry
Embodiment 3
(1) paddy comminution pretreatment: will storage be limited in year 5 years grains in storage for years successively pass through specific-gravity stoner (model:
TQSF200), electric magnetic iron remover (model: RCDB), roller classifying screen (model: GS1530), to remove sandstone, ironware, braided fabric
Equal impurity.The a part of paddy of the paddy after grit water separator as paddy meal under the sieve of roller classifying screen, paddy on sieve
It is further crushed by beater grinder (model: PC-0604), sieve lower paddy and sieves the upper smashed paddy meal particle of paddy
Diameter was 25 mesh screens, after being mixed, separates material with impurity such as dust by CZT type cyclone separator, is obtained 25
The paddy meal of mesh screen.
(2) it prepares liquefied fermented glutinous rice: paddy meal and water being formed into slurry after mixing, wherein the material-water ratio of paddy meal is 1:
2, with sulphur acid for adjusting pH to 5.3, control slurry dry substance concentration is 28wt%, relative to the quality of slurry, adds high-temperature starch
Enzyme (believes) 0.3kg/t from Novi.After being preheated to 55 DEG C in slurry tank, steam liquefied injection is entered with charging rate 100t/h
Device (model: HYW-D), slurry enter boiling after the injection liquefaction of steam liquefied injector and maintain tank, and boiling maintains temperature in tank
It is 95 DEG C.86 DEG C are down to using temperature after liquefaction vacuum flash, into liquefied pot liquefaction 150min, is first passed through after liquefaction
Flash distillation is cooled to 70 DEG C, is cooled to 32 DEG C using plate heat exchanger, obtains liquefied fermented glutinous rice.
(3) it prepares yeast wash: liquefied fermented glutinous rice, water and distiller's yeast being added in activation pot, the mass ratio of three is 10:5:1, is passed through
Filtrated air maintains 35 DEG C of activation temperature by external plate heat exchanger, and distiller's yeast Hydration Activation forms activating solution.Activating solution is subsequent
It is passed through to the distiller's yeast tank equipped with liquefied fermented glutinous rice, wherein the mass ratio of activating solution and liquefied fermented glutinous rice is 1:9, filtrated air is passed through, to ferment
The ammonium sulfate of 3kg/t is added in female tank as inorganic nitrogen-sourced.Under aerobic conditions, the rapid mass propagation of distiller's yeast, and heat is generated,
Heat is taken away by the outer loop of external plate heat exchanger, maintenance spreads cultivation 29 DEG C of temperature.After cultivating 15h, distiller's yeast number is up to 2.5
Hundred million/mL or more obtains yeast wash.
(4) it prepares fermenting-ripening wine with dregs: remaining liquefied fermented glutinous rice is added in fermentor, and add sulphur acid for adjusting pH to 4.3, phase
For the quality of remaining liquefied fermented glutinous rice, adds high-effective glucoamylase and (believe) 2.14kg/t, urea 1.02kg/t, ammonium sulfate from Novi
8kg/t.In fermentor, yeast wash is added with the inoculum concentration of 15% (v/v), using the simultaneous saccharification and fermentation technique of intermittently operated
It ferments.In fermentation process, preceding 8h controls 30 DEG C of fermentation temperature, and 8h is later controlled at 33 DEG C, after fermentation carries out 60h,
End obtains fermenting-ripening wine with dregs.
(5) prepare alcohol fuel: Distallation systm is made of topping still, first rectifying column and Second distillation column.Fermenting-ripening
By three-level preheating, (wherein the heat source of level-one preheating is topping still tower overhead gas to wine with dregs, and the heat source of second level preheating is that topping still side line is adopted
Gas phase out, three-level preheating heat source be molecular sieve system finished product fume) reach 60 DEG C after, with 100m3/ h inlet amount successively into
Enter topping still, first rectifying column and Second distillation column, wherein the number of plates difference of topping still, first rectifying column and Second distillation column
It is 32,9 and 32.First rectifying column is using fresh direct steam as heat source, and first rectifying column tower overhead gas is as the second rectifying
Tower heat source, Second distillation column tower overhead gas is as topping still heat source.First rectifying column tower bottom kettle liquid is used as the spice in step (2)
Water uses.Produce 94% (v/v) alcohol steam at the top of Second distillation column, alcohol steam enter after superheater by adsorption tower and
The molecular sieve system of desorption column composition.Alcohol steam obtains finished product fume after adsorption tower is dehydrated, then obtains 14m after cooling3/
The anhydrous alcohol fuel of h, desorption column is by backwashing, vacuumizing regeneration, two tower interworkings.Desorption column recoil is washed out comprising few
The light wine of amount alcohol fuel enters thin alcohol recovery tank, is recycled to first rectifying column.
(6) prepare rice DDGS: topping still tower bottom kettle liquid and Second distillation column tower bottom kettle liquid are mixed to form Distallation systm
Useless mash, useless mash isolate clear liquid and wet grain by plate and frame filter press.Wherein, wet poor solid content is 38wt%, clear liquid
Solid content is 5wt%.Clear liquid obtains clear liquid concentrate, solid content 34wt% by evaporation and concentration.Wet grain is logical
It crosses screw conveyor and enters roller drier, the dry grain that roller drier generates enters pipe bundle drier by screw conveyor,
Clear liquid concentrate is added simultaneously, the rice DDGS that moisture content is 7wt% is obtained after pipe bundle drier is dry.
The volume fraction of ethanol and component content for the anhydrous alcohol fuel that embodiment 1- embodiment 3 obtains are as shown in table 2.
As can be seen from Table 2, the anhydrous alcohol fuel that embodiment 1- embodiment 3 produces is all satisfied standard GB/T 18350-2013, and
And the volume fraction of ethanol in the dehydrated alcohol fuel obtained according to the method for the present invention is high, corresponding other impurities content is low,
It therefore is a kind of extremely environmentally friendly green clean energy resource.
The alcohol fuel and national standard of 2 embodiment 1- embodiment 3 of table production compare
Comparative example 1
Other than grain in storage for years is replaced with corn, remaining process in comparative example 1 is same as Example 1, obtains nothing
Water alcohol fuel and corn DDGS.By calculating, the cost price that alcohol fuel per ton is produced by raw material of grain in storage for years is 3603 yuan/
T is 4355 yuan/t by the cost price of raw material of corn, it is seen that economic advantages will be had more when using grain in storage for years as raw material.
The following table 3 shows the protein of the DDGS produced in embodiment 1- embodiment 3 and comparative example 1 and mycotoxin contains
Amount, wherein the measurement of the protein content in DDGS uses Kjeldahl's method, and mycotoxin levels measurement uses high-efficient liquid phase color
Spectrometry.
The protein and mycotoxin levels of the DDGS produced in 3 embodiment 1- embodiment 3 of table and comparative example 1 compares
*: total content refers to the total content of four kinds of mycotoxins
As can be seen from Table 3, the zearalenone content in rice DDGS produced in embodiment 1- embodiment 3 is lower than
Zearalenone content in corn DDGS in comparative example 1.Known zearalenone has estrogenic effect, can make
At animal acute and chronic poisoning, cause Reproduction abnormal or even dead, when the zearalenone too high levels in DDGS
When, huge economic losses can be caused to animal farm.In addition, zearalenone is due to residual and being not easy to be destroyed,
If zearalenone will for a long time in animal body when the DDGS feed of Long term Animal edible corn zeranol too high levels
Accumulation, people once eat such animal, similarly it would be possible to further result in human lesion.Further, comparative example 1 is compared, it is real
The total content for applying four kinds of mycotoxins in the DDGS produced in a 1- embodiment 3 is relatively low.As it can be seen that giving birth to by means of the present invention
The rice DDGS of production will be safer, when being limited to the grain in storage for years of 3-4 year especially with storage, pass through the rice of its production
Four kinds of mycotoxin levels (especially zearalenone) in DDGS are far below the corn DDGS by maize production.
In addition, the protein content in the rice DDGS produced in embodiment 1- embodiment 3 is also much higher than in comparative example 1
Protein content in the corn DDGS of production, and the albumen in rice DDGS is the high-quality full price albumen without anaphylactogen,
Including rice protein and distiller's yeast albumen.Therefore the nutritive value of the rice DDGS obtained by means of the present invention is also much higher than logical
Cross the corn DDGS that maize production obtains.
Claims (10)
1. a kind of method of paddy processing production alcohol fuel and by-product rice DDGS, the described method comprises the following steps:
(1) paddy comminution pretreatment: removing impurity for paddy, crush through pulverizer, and the paddy meal of 25 mesh screens is obtained；
(2) it prepares liquefied fermented glutinous rice: paddy meal and water is formed into slurry after mixing, adjusting pH is 5.2-5.5, adds high-temperature starch
Enzyme, the slurry are preheated to 53-55 DEG C in slurry tank, enter boiling after high-temperature steam injection liquefaction and maintain tank, boiling
Maintaining temperature in tank is 95-97 DEG C, is down to 85-87 DEG C using temperature after vacuum flash, liquefies into liquefied pot, liquefaction terminates
Afterwards, it is cooled to 65-75 DEG C by vacuum flash, is cooled to 31-32 DEG C using heat exchanger, obtains liquefied fermented glutinous rice；
(3) it prepares yeast wash: liquefied fermented glutinous rice, water and distiller's yeast being added in activation pot, is passed through filtrated air, is tieed up by external heat exchanger
Holding activation temperature is 34-36 DEG C, and distiller's yeast Hydration Activation forms activating solution；The activating solution is passed through the distiller's yeast tank equipped with liquefied fermented glutinous rice
It is interior, be passed through filtrated air, by external heat exchanger maintenance spread cultivation 28-30 DEG C of temperature, distiller's yeast bred rapidly under aerobic conditions to
Distiller's yeast number reaches 2.5 hundred million/mL or more, obtains yeast wash；
(4) it prepares fermenting-ripening wine with dregs: remaining liquefied fermented glutinous rice is added in fermentor, adjusting pH value is 4.2-4.4, while adding height
Imitate carbohydrase, urea；Yeast wash is added into fermentor with the inoculum concentration of 15-20% (v/v), under anaerobic in fermentor
It inside ferments, obtains fermenting-ripening wine with dregs；
(5) prepare alcohol fuel: fermenting-ripening wine with dregs enters Distallation systm after preheating, the alcohol produced from the Distallation systm
Steam enters molecular sieve system after superheater, and dehydrated cooled obtains anhydrous alcohol fuel；
(6) prepare rice DDGS: the useless mash of Distallation systm is separated by filtration to obtain clear liquid and wet grain, the clear liquid is evaporated dense
Contracting obtains clear liquid concentrate, after the wet grain is mixed into drying machine drying with the clear liquid concentrate again after drying, i.e.,
Obtain rice DDGS.
2. true the method also includes being carried out to the paddy the method for claim 1, wherein before step (1)
The step of verticillium toxin detection, screening, it is preferable that mycotoxin detection, sieve are carried out to the paddy using high performance liquid chromatography
Choosing.
3. method according to claim 1 or 2, wherein the paddy is selected from one kind or more of new grain, grain in storage for years and grain in storage for years
Kind, the paddy is preferably to store the grain in storage for years for being limited to 3-5 year, more preferably stores the grain in storage for years for being limited to 3-4 year.
4. method as claimed in any one of claims 1-3, wherein in step (2), the spice ratio of the paddy meal and water
For 1:1.9-1:2.1, preferably 1:2；The dry substance concentration of the slurry is controlled in 27-29wt%, preferably 28wt%；Relatively
In the quality of the paddy, the additive amount of the alpha-amylase is 0.3kg/t；Liquefying time in the liquefied pot is
140-160min, preferably 150min.
5. such as method of any of claims 1-4, wherein in step (3), the distiller's yeast is in the distiller's yeast tank
Spread cultivation the time be 12-18h, preferably 15h.
6. method according to any one of claims 1 to 5, wherein in step (4), the yeast wash is with 15% (v/v)
Inoculum concentration be seeded in fermentor.
7. such as method of any of claims 1-6, wherein in step (4), the fermentation is that synchronous saccharification is sent out
Ferment, and the simultaneous saccharification and fermentation is intermittently operated.
8. such as method of any of claims 1-7, wherein the institute into distiller's yeast tank described in step (3) and step (4)
State added in fermentor it is inorganic nitrogen-sourced, it is described it is inorganic nitrogen-sourced selected from ammonium sulfate, ammonium nitrate and ammonium chloride it is one or more, preferably
For ammonium sulfate.
9. such as method of any of claims 1-8, wherein in step (5), the Distallation systm is thermal coupling,
And including topping still and rectifying column；The molecular sieve system includes adsorption tower and desorption column.
10. method as claimed in any one of claims 1-9 wherein, wherein in step (6), the moisture of the rice DDGS contains
Amount is less than 10wt%.
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| CN115029388A (en) * | 2021-03-05 | 2022-09-09 | 国投生物科技投资有限公司 | Method for co-producing ethanol and DDGS (distillers dried grains with soluble) by fermenting raw materials with wheat |
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