CN101130792A - Method for producing fuel alcohol by straw enzymolysis - Google Patents

Abstract

The invention relates to a method for making alcohol fuel with the maize straw in the biological energy and agronomic crop straw comprehensive utilization technique field, which comprises the following steps: disintegrating the maize straw into 40 order straw powder; adding 1-5% straw weight microorganism complex enzyme bacterial liquid; disassembling the usable cellulose and hemicellulose in the straw; converting into sugar; fermenting with yeast; acquiring alcohol with distillation process. The invention makes the straw saccharifying fermentation technology simple and easy with efficient and cheap complex enzyme comprised by microbial population, which shortens the alcohol preparation process with the maize straw, reduces the production cost of alcohol, opens a feasible road for large scale industry production of cellulose alcohol.

Description

A kind of method of producing fuel alcohol by straw enzymolysis

A kind of method of producing fuel alcohol by straw enzymolysis, effect is remarkable, and the scope of application is extensive, and the preparation method is simple and direct, compliance with environmental protection requirements.

One, technical field

Belong to biomass energy and crop stalk comprehensive utilization technique field.

Two, background technology

1, to inventing the understanding of " a kind of method of producing fuel alcohol by straw enzymolysis "

The development and use of biomass energy have become heat subject in the world.To be sun power be stored in a kind of form of energy in the biology with the chemical energy form to biomass energy, is a kind of unique reproducible carbon source.Estimate annual photosynthesis of plant fixed sun power on the earth according to scientist, be equivalent to annual more than 10 times of energy consumption in the whole world.Be inexhaustible.The development and use biomass energy substitutes stone, the coal resource that reduces day by day, has become China's alleviating energy crisis, readjusts the energy structure, and ensures the grand strategy measure of energy security.

Alcohol is the important substitute of stone, the coal energy, and it can partly or entirely substitute gasoline.Have safety, cleaning, advantage such as renewable, utilize biomass to produce the important ring that alcohol is the development and use bioenergy.But because at present alcohol is fermenting raw materials production with molasses, administration's class and cereal mainly, exist with the people strive grain, strive with production cost than problems such as height.Along with Increase of population, this contradiction is returned outstanding all the more.So utilization is abundant, cheap corn stalk has just become a kind of necessary trend for the raw material production fuel alcohol.

Straw is a kind of important biomass energy resource as the byproduct of farm crop.Its output is huge, and only the annual straw output of China just reaches more than 700,000,000 tons.It is a kind of of wherein output maximum that corn stalk has.For a long time, corn stalk is except that part is utilized, and most of being incinerated not only caused the waste of resource, but also towering environment.In this year, national departments concerned and part Alcohol Production enterprise all carry out the tackling key problem of cellulosic ethanol production technology making great efforts, and many countries are also carrying out this research.But also not realizing large-scale industrial production at present, mainly is that economic problems and production cost are too high.Because the plant straw particularly corn stalk precondition that changes into alcohol is to make Mierocrystalline cellulose, hemicellulose decompose saccharogenesis through pre-treatment, changes into alcohol through fermentation again.And common corn stalk pretreatment process comprises hydrolysis method at present, the acid-alkali treatment method, and the organic solvent facture, all there are complex process to some extent in biomass and wet oxidation, the problem that processing costs is too high.The method that has also can produce new pollutent.So be difficult to be applied to large-scale industrial production.Therefore turn out the plain enzyme of tencel of cheap high vigor, develop the corn stalk pre-treatment new technology that flow process is short, efficient is high, energy consumption is low, just become global brainstorm subject.

Three, summary of the invention

1, the purpose of invention " a kind of method of producing fuel alcohol by straw enzymolysis "

The objective of the invention is to utilize efficient, the cheap prozyme that constitutes by microorganism species, corn stalk is carried out enzymolysis and saccharification, form the new technology route of the corn stalk production alcohol that flow process is short, efficient is high, energy consumption is low.Thereby overcome with other method straw is handled the complex process of existence, the deficiency that cost is too high.Open up a practical way for utilizing corn stalk large-scale industrial production fuel alcohol.

2, the technical solution adopted for the present invention to solve the technical problems

At first, preparation microbial compound enzyme bacterium liquid the steps include:

(1), cultivates and gathers microbial strains, the bright straw of 10kg is crushed to 1-5cm, get tenebrio molitor 1kg alive, straw and tenebrio molitor after pulverizing are put into container, under 15-30 degree centigrade condition, left standstill 5-10 days, add the 50kg mineral water then, cultivated at normal temperatures 30 days, and again dry-matter was removed, obtain original microbial strains liquid.

(2), microorganisms flora liquid, the bright straw of 100kg is crushed to below 40 orders, behind boiling sterilization, add 1000kg mineral water and the original microorganism species liquid of 50kg, at PH5.5-6.5, cultivated under temperature 25-35 degree centigrade the condition 5-10 days, make the microorganism species liquid after the propagation.

(3), produce microorganism and meet enzyme bacterium liquid, " Shen Nong straw wet feed starter " additive will be added in the mentioned microorganism flora liquid, its weight proportion is: microbial compound enzyme bacterium liquid: " Shen Nong straw wet feed starter " additive=1: 0.005-0.01, deployed microorganism species liquid was left standstill under the 25-35 degrees celsius 24 hours, make microbial compound enzyme bacterium liquid.

Secondly, the fermented maize straw, distillation extraction alcohol the steps include:

(1), corn stalk is crushed to the 20-40 order;

(2), the straw powder microbe inoculation after will pulverizing meets enzyme bacterium liquid, the technology proportioning of its parts by weight of component is: corn straw powder: microorganism meets enzyme bacterium liquid: water: yeast=1: 0.01-0.05: 5-8: 0.001-0.002;

(3) postvaccinal corn straw powder is stirred, in the fermenting container of packing into, under the 25-35 degrees celsius, sealing and fermenting 10-15 days;

(4), produce alcohol, the material that ferments is carried out three distillations, obtain the above fuel alcohol of 95-99.5%, the collection flow process during distillation is 78-170 degree centigrade with distillation method.

3., the beneficial effect compared with background technology of a kind of method of producing fuel alcohol by straw enzymolysis

The method of a kind of producing fuel alcohol by straw enzymolysis of the present invention, owing to adopted the microbial compound enzyme of efficient cheapness that corn stalk is carried out enzymolysis processing, saved the saccharification operation in the traditional technology, thereby greatly reduce the production cost that corn stalk changes into alcohol, its cost only is to have now to utilize 2/3rds of Maize Production fuel alcohol cost, makes and utilizes corn stalk large-scale industrial production fuel alcohol to become possibility.Simultaneously, utilize method of the present invention to produce the corn stalk fuel alcohol and also have nothing " three wastes " discharging, free of contamination clear superiority.

Four, embodiment

Now the present invention is further elaborated in conjunction with the embodiments: at first, bright corn stalk 10kg is crushed to 1-5cm, gets tenebrio molitor 1kg alive.Corn stalk and tenebrio molitor after pulverizing are put into container, under 15-30 degree centigrade condition, left standstill 5-10 days.Add the 50kg mineral water then, cultivated at normal temperatures 30 days.Again dry-matter is removed, obtain original microbial strains liquid.Secondly, the bright straw of 100kg is crushed to below 40 orders, behind boiling sterilization, adds 1000kg mineral water and the original microbial strains liquid of 50kg,, cultivated 5-10 days under temperature 25-35 degree centigrade the condition, make the microorganism species liquid after the propagation at PH5.5-6.5.Once more, will make adding " Shen Nong straw wet feed starter " additive in the microorganism species liquid.Its weight proportion is: microbial compound enzyme bacterium liquid: " Shen Nong straw wet feed starter " additive=1: 0.005-0.01.The microorganism species liquid of transferring was left standstill under the 25-35 degrees celsius 24 hours, make microbial compound enzyme bacterium liquid.Then, get 20-40 order straw powder 1000kg, microbial compound enzyme bacterium liquid 10kg, yeast saccharomyces cerevisiae 2kg, mineral water 5000kg.Stir above-mentioned material stand-by.Again, with the material that the stirs fermenting container of packing into, under the 25-35 degrees celsius, sealing and fermenting 10-15 days.At last, the material that ferments is carried out three distillations, the collection flow process during distillation is 78-170 degree centigrade, obtains the fuel alcohol of 95-99.95%.

Embodiment one:

Get 20-40 order straw powder 6000kg, microbial compound enzyme bacterium liquid 60kg, yeast saccharomyces cerevisiae 10kg, mineral water 30,000kg.After above-mentioned material stirred, in the fermenting container of packing into, under the 25-35 degrees celsius, sealing and fermenting 10-15 days, again the material that ferments is carried out three distillations, can obtain the raw spirit of 95-99.95%.

Claims (3)

1. the method for a producing fuel alcohol by straw enzymolysis, it is characterized in that: at first straw is ground into 40 purpose straw powder, and adding straw grain weight amount 5-8 water doubly, the yeast saccharomyces cerevisiae that adds 1-5% microbial compound enzyme bacterium liquid and 0.1-0.5% additive and 1-2% simultaneously, the straw powder is carried out enzymolysis and fermentation, extract alcohol with distillation method at last.

2. according to the method for right 1 described a kind of producing fuel alcohol by straw enzymolysis, it is characterized in that the preparation of microbial compound enzyme bacterium liquid may further comprise the steps:

(1) collection of microbial strains: the fresh straw of 10kg is crushed to 1-5cm, gets tenebrio molitor 1kg alive, the straw after tenebrio molitor and the pulverizing is put into container, under the 15-30 degrees celsius, quiet putting 5-10 days adds 50 kilograms of mineral waters then and cultivated 30 days, obtains original microbial strains;

(2) microbial growth is cultivated: the 100kg corn stalk is crushed to below 40 orders, behind boiling sterilization, add 1000kg mineral water and the original microbial strains of 50kg, be 5.5-6.5 at pH, cultivated under temperature 25-35 degree centigrade the condition 5-10 days, and made the microorganism species liquid after the propagation;

(3) produce microbial compound enzyme bacterium liquid: " Shen Nong straw wet feed starter " additive will be added in the mentioned microorganism flora liquid, its weight ratio is: microbial compound enzyme bacterium liquid: " Shen Nong straw wet feed starter " additive=1: 0.005-0.01, the microorganism species liquid of having allocated was left standstill under the 25-35 degrees celsius 24 hours, make microbial compound enzyme bacterium liquid.

3. according to the method for right 1 described a kind of producing fuel alcohol by straw enzymolysis, it is characterized in that the fermented distilled fuel alcohol that obtains of straw powder may further comprise the steps:

(1) corn stalk is crushed to the 20-40 order;

(2) the straw powder microbe inoculation composite enzyme bacterium liquid after will pulverizing: its weight ratio is: corn straw powder: microbial compound enzyme bacterium liquid: water: yeast=1: 0.01-0.05: 0.001-0.002;

(3) postvaccinal corn straw powder is stirred, in the fermenting container of packing into, under the 25-35 degrees celsius, sealing and fermenting 10-15 days;

(4) produce alcohol with distillation method: the material that ferments is carried out three distillations, obtain the above fuel alcohol of 95-99.5%, collecting flow process during distillation is 78-170 degree centigrade.