CN106434767B - Method for producing industrial alcohol by using secondary starch slurry and cassava powder - Google Patents
Method for producing industrial alcohol by using secondary starch slurry and cassava powder Download PDFInfo
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- CN106434767B CN106434767B CN201611053358.6A CN201611053358A CN106434767B CN 106434767 B CN106434767 B CN 106434767B CN 201611053358 A CN201611053358 A CN 201611053358A CN 106434767 B CN106434767 B CN 106434767B
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
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- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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Abstract
The invention relates to the technical field of industrial alcohol production, in particular to a method for producing industrial alcohol by using sub-starch slurry and cassava powder. The method comprises the following steps: (1) pretreating cassava flour and obtaining secondary starch slurry; (2) mixing the cassava flour and the secondary starch slurry; (3) liquefying, saccharifying and fermenting the mixed slurry to prepare alcohol; (4) crude and fine distillation of alcohol. The invention solves the problem of high cost of alcohol production by fermentation, and has the following beneficial effects: the waste liquid, namely the secondary starch slurry, is fully utilized as the raw material for producing the industrial alcohol, so that the production cost is reduced, the waste is effectively utilized, the waste is prevented, the treatment cost of the waste is saved, and the environment is not polluted.
Description
Technical Field
The invention relates to the technical field of alcohol production, in particular to a method for producing alcohol by using sub-starch slurry and cassava powder.
Background
Alcohol is an important industrial raw material widely applied to various fields such as food, medicine, chemical industry, scientific research and the like, and is divided into two types: edible alcohol and industrial alcohol, also called denatured alcohol, industrial fire wine, have purity of typically 95% and 99%. The method for producing the industrial alcohol mainly comprises two modes of synthesis and brewing, the synthesis cost is low, the methanol content is high, and the price is low; the brewed industrial alcohol generally has ethanol content of more than or equal to 95 percent and methanol content of less than 0.01 percent, and is expensive.
Brewing industrial alcohol is also called fermentation industrial alcohol production. The main raw material for producing industrial alcohol by the current fermentation method in China is a starchy raw material, and the principle is that the starchy raw material is hydrolyzed into glucose under the action of microorganisms and then is further fermented to generate alcohol. The whole production process comprises the following steps: removing impurities from raw materials, crushing, stirring, pre-boiling, stewing, liquefying, saccharifying, fermenting, distilling and the like.
The starchy raw materials for producing industrial alcohol by fermentation in the prior art are basically corn, potatoes, grains and the like in grain crops, and the production cost of the industrial alcohol is gradually increased along with the increase of population and the development of economy and the reduction of arable land area in China.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for producing industrial alcohol by using sub-starch slurry and cassava powder, and solves the problem of high production cost of the industrial alcohol.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for producing industrial alcohol by using sub-starch slurry and cassava flour is characterized by comprising the following steps:
(1) pretreating cassava flour and obtaining secondary starch slurry;
(2) mixing the cassava flour and the secondary starch slurry;
(3) liquefying, saccharifying and fermenting the mixed slurry to prepare alcohol;
(4) crude and fine distillation of alcohol.
Preferably, in the step (1), the cassava flour is pretreated by adding the cassava flour into a pulverizer to be physically pulverized, and then filtering the pulverized cassava flour by using a 40-mesh sieve.
Preferably, in the step (1), the secondary starch slurry is waste liquid obtained after starch is extracted from flour.
Preferably, in the step (2), the mixing process of the cassava flour and the secondary starch slurry comprises the following steps: mixing the secondary starch slurry and the cassava flour according to the weight ratio of (3-4) to (7-6), adding water into the mixture according to the weight ratio of (2.2-2.4) to the mixture, heating to 50-60 ℃, and continuously stirring in the heating process to uniformly mix the mixed slurry.
Preferably, in the step (3), the liquefaction process: adding the amylase into the mixed slurry according to the amount of 10-15U of amylase per gram of cassava flour, continuously stirring and uniformly mixing, standing at 50 ℃ for 30-40 min to enable the cassava flour to be gelatinized, heating to 95 ℃, adjusting the pH value to 4, and preserving heat and liquefying for 2-2.5 hours.
Preferably, the amylase is α -amylase.
Preferably, in the step (3), the saccharification process comprises: and (3) cooling the liquefied material to 34 ℃, adding saccharifying enzyme into the cooled mash according to the amount of 140-160U saccharifying enzyme per gram of cassava powder, adjusting the pH value to be 4, and saccharifying for 30 min.
Preferably, in the step (3), the fermentation process: inoculating activated yeast according to the weight ratio of yeast to liquefied and saccharified mash of 8-10%, and fermenting for 72 h.
Preferably, in the step (4), the crude distillation and the fine distillation are carried out: and after the fermented mature mash is subjected to rough distillation by a rough distillation tower, the fermented mature mash is rectified by a rectifying tower to obtain an alcohol finished product.
(III) advantageous effects
The invention provides a method for producing industrial alcohol by matching sub-starch slurry with cassava flour, which comprises the steps of firstly carrying out sieving pretreatment on the cassava flour, then mixing the treated cassava flour sub-starch slurry, then sequentially carrying out liquefaction, saccharification and fermentation on the mixed slurry to prepare alcohol, and finally carrying out coarse distillation and fine distillation on the alcohol obtained by fermentation by using a coarse distillation tower and a fine distillation tower to prepare a final industrial alcohol product.
By the mode, the following beneficial effects are achieved:
the waste liquid left after the flour is extracted with starch, namely the secondary starch slurry, is fully utilized as the raw material for producing the industrial alcohol, so that the production cost is reduced, the waste is fully utilized to fully utilize the raw material, the waste is prevented, the treatment cost of the waste is saved, and the environment is not polluted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a production flow chart of industrial alcohol according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, it is explained that the raw material price for producing industrial alcohol is high, which results in an increase in the cost for producing industrial alcohol. The selection of lower cost raw materials is one of the ways to solve this problem.
A large amount of starch slurry wastes are generated after wheat gluten powder and starch are extracted by a plurality of companies in China, the discharge of the partial wastes brings huge burden to the treatment of the environmental protection department, the materials are wasted, and the problem of comprehensive utilization of resources is urgently needed to be solved.
Cassava is one of three potatoes in the world and is widely cultivated in tropical and subtropical regions. In the tropical regions of south asia of China, cassava is the fifth largest crop next to rice, sweet potato, sugarcane and corn. It has important roles in crop layout, feed production, industrial application and the like, and has become a main processed starch and feed crop widely planted. At present, the cassava flour in China has high yield and relatively low price and can be used as a raw material for producing industrial alcohol.
In view of the above, there is provided a method for producing industrial alcohol from a secondary starch slurry in combination with tapioca flour according to embodiments of the present invention. The method comprises the following steps:
(1) pretreating cassava flour and obtaining secondary starch slurry;
(2) mixing the cassava flour and the secondary starch slurry;
(3) liquefying, saccharifying and fermenting the mixed slurry to prepare alcohol;
(4) crude and fine distillation of alcohol.
The following will be specifically explained by specific examples.
Example 1:
the method comprises the following steps of producing alcohol by fermenting the secondary starch slurry and the cassava powder.
Firstly, flour is kneaded, washed, screened and cleaned to remove impurities, slurry is concentrated, centrifugally dehydrated, dried, screened, and waste liquid, namely secondary starch slurry, left after starch packaging is collected and stored. Meanwhile, the cassava powder is added into a grinder for physical grinding and then filtered by a 40-mesh filter screen. Mixing 700kg of pretreated cassava flour and 300kg of starch slurry in a liquefying tank, adding 2200kg of water into the liquefying tank, heating to 50 ℃, adding amylase into the mixed slurry according to the amount of 10U of amylase corresponding to each gram of cassava flour, continuously stirring until the slurry is in a uniformly mixed state, standing at 50 ℃ for 30min for gelatinization, heating to 95 ℃, adjusting the pH value to 4, and liquefying for 2 hours under heat preservation.
And secondly, cooling the cooking liquor to 34 ℃ through a vacuum cooler, feeding the cooking liquor into a saccharifying tank, adding saccharifying enzyme into the cooled mash according to the amount of 140U saccharifying enzyme per gram of cassava powder, continuously stirring until the slurry is in a uniformly mixed state, adjusting the pH to be 4, and saccharifying for 30 min.
Then, the mash is cooled and pumped into a fermentation tank, and 8% of activated yeast is inoculated at the same time for fermentation at 34 ℃ for 72 h.
Finally, the fermented mash is heated by a preheater, and then passes through a rough distillation tower and a rectification tower in sequence, and then is made into a finished product through the procedures of water washing, dealcoholization and the like, and the finished product industrial alcohol enters a finished product tank after being cooled.
About 345kg of industrial alcohol with the alcohol degree of 95 percent is finally prepared, and the results show that the yield of alcohol produced by fermentation is high and the production cost is reduced.
Example 2:
the method comprises the following steps of producing alcohol by fermenting the secondary starch slurry and the cassava powder.
Firstly, flour is kneaded, washed, screened and cleaned to remove impurities, slurry is concentrated, centrifugally dehydrated, dried, screened, and waste liquid, namely secondary starch slurry, left after starch packaging is collected and stored. Meanwhile, the cassava powder is added into a grinder for physical grinding and then filtered by a 40-mesh filter screen. Mixing 650kg of pretreated cassava flour and 350kg of starch slurry in a liquefying tank, adding 2300kg of water into the liquefying tank, heating to 55 ℃, adding amylase into the mixed slurry according to the amount of 13U of amylase corresponding to each gram of cassava flour, continuously stirring until the slurry is in a uniformly mixed state, standing at 55 ℃ for 35min for gelatinization, heating to 95 ℃, adjusting the pH value to 4, and liquefying at the temperature for 2.3 h.
And secondly, cooling the cooking liquor to 34 ℃ through a vacuum cooler, feeding the cooking liquor into a saccharifying tank, adding saccharifying enzyme into the cooled mash according to the amount of 150U of saccharifying enzyme per gram of cassava powder, continuously stirring until the slurry is in a uniformly mixed state, adjusting the pH to be 4, and saccharifying for 30 min.
Then, the mash is pumped into a fermentation tank after being cooled, 9% of activated yeast is inoculated at the same time for fermentation at 34 ℃, and the fermentation is carried out for 72 hours.
Finally, the fermented mash is heated by a preheater, and then passes through a rough distillation tower and a rectification tower in sequence, and then is made into a finished product through the procedures of water washing, dealcoholization and the like, and the finished product industrial alcohol enters a finished product tank after being cooled.
The final alcohol content of 352kg is 97%, and the results show that the yield of alcohol produced by fermentation is high and the production cost is reduced.
Example 3:
the method comprises the following steps of producing alcohol by fermenting the secondary starch slurry and the cassava powder.
Firstly, flour is kneaded, washed, screened and cleaned to remove impurities, slurry is concentrated, centrifugally dehydrated, dried, screened, and waste liquid, namely secondary starch slurry, left after starch packaging is collected and stored. Meanwhile, the cassava powder is added into a grinder for physical grinding and then filtered by a 40-mesh filter screen. Mixing 600kg of pretreated cassava flour and 400kg of starch slurry in a liquefying tank, adding 2400kg of water into the liquefying tank, heating to 60 ℃, adding amylase into the mixed slurry according to the amount of 15U of amylase corresponding to each gram of cassava flour, continuously stirring until the slurry is in a uniformly mixed state, standing at 60 ℃ for 35min for gelatinization, heating to 95 ℃, adjusting the pH value to 4, and preserving heat for liquefying for 2.5 hours.
And secondly, cooling the cooking liquor to 34 ℃ through a vacuum cooler, feeding the cooking liquor into a saccharifying tank, adding saccharifying enzyme into the cooled mash according to the amount of 160U saccharifying enzyme per gram of cassava powder, continuously stirring until the slurry is in a uniformly mixed state, adjusting the pH to be 4, and saccharifying for 30 min.
Then, the saccharified mash is pumped into a fermentation tank after being cooled, and 10% of activated yeast is inoculated to ferment at 34 ℃ for 72 hours.
Finally, the fermented mash is heated by a preheater, and then passes through a rough distillation tower and a rectification tower in sequence, and then is made into a finished product through the procedures of water washing, dealcoholization and the like, and the finished product industrial alcohol enters a finished product tank after being cooled.
The final alcohol content of about 362kg was 96%, and it can be seen from the results that the yield of alcohol produced by fermentation was high and the production cost was reduced.
In summary, the embodiments of the present invention have the following advantages:
the embodiment of the invention produces the alcohol by utilizing the secondary starch slurry and the cassava powder for fermentation, fully utilizes the waste liquid left after the flour extracts the starch, namely the secondary starch slurry, as the raw material to produce the industrial alcohol, reduces the production cost, fully utilizes the waste to fully use the raw material, prevents waste and does not pollute the environment.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A method for producing industrial alcohol by using sub-starch slurry and cassava flour is characterized by comprising the following steps:
(1) flour is processed by dough kneading, washing, screening and washing to remove impurities, slurry concentration, centrifugal dehydration, starch drying, screening and starch packaging, and then the remaining waste liquid, namely secondary starch slurry, is collected and stored; meanwhile, adding the cassava powder into a pulverizer for physical pulverization, and then filtering by using a 40-mesh filter screen; mixing 600kg of pretreated cassava flour and 400kg of starch slurry in a liquefaction tank, adding 2400kg of water into the liquefaction tank, heating to 60 ℃, adding amylase into the mixed slurry according to the amount of 15U of amylase corresponding to each gram of cassava flour, continuously stirring until the slurry is in a uniformly mixed state, standing at 60 ℃ for 35min for gelatinization, heating to 95 ℃, adjusting the pH value to 4, and preserving heat for liquefaction for 2.5 hours;
(2) cooling the cooking liquor to 34 ℃ through a vacuum cooler, feeding the cooking liquor into a saccharifying tank, adding saccharifying enzyme into the cooled mash according to the amount of 160U saccharifying enzyme per gram of cassava powder, continuously stirring until the slurry is in a uniformly mixed state, adjusting the pH to be 4, and saccharifying for 30 min;
(3) cooling the saccharified mash, pumping into a fermentation tank, inoculating 10% activated yeast, fermenting at 34 deg.C for 72 hr;
(4) heating fermented mash by a preheater, sequentially passing through a coarse distillation tower and a rectification tower, and then carrying out water washing and dealcoholization processes to prepare a finished product.
2. The method of claim 1, wherein the amylase is α -amylase.
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| CN111254166A (en) * | 2018-11-30 | 2020-06-09 | 国投生物科技投资有限公司 | Method for co-producing alcohol and biogas by utilizing cassava and method for generating power by utilizing biogas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101070549A (en) * | 2006-05-12 | 2007-11-14 | 广东中科天元再生资源工程有限公司 | Mixed raw-material fermenting process for producing alcohol |
| CN101948876A (en) * | 2010-06-25 | 2011-01-19 | 张超 | Method for preparing ethanol through fermentation of cassava |
| CN106011179A (en) * | 2016-08-05 | 2016-10-12 | 安徽安特食品股份有限公司 | Alcohol production technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101070549A (en) * | 2006-05-12 | 2007-11-14 | 广东中科天元再生资源工程有限公司 | Mixed raw-material fermenting process for producing alcohol |
| CN101948876A (en) * | 2010-06-25 | 2011-01-19 | 张超 | Method for preparing ethanol through fermentation of cassava |
| CN106011179A (en) * | 2016-08-05 | 2016-10-12 | 安徽安特食品股份有限公司 | Alcohol production technology |
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