CN1076756C

CN1076756C - Clean process for preparing alcohol

Info

Publication number: CN1076756C
Application number: CN99114448A
Authority: CN
Inventors: 金丰秋; 金其荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-17
Filing date: 1999-09-17
Publication date: 2001-12-26
Anticipated expiration: 2019-09-17
Also published as: CN1253181A

Abstract

The present invention relates to a clean process for producing alcohol, which belongs to the technical field of producing alcohol by a fermentation method. The present invention separates filter residues before fermentation. Consequently, a new technology can not generate a large amount of spent wash, and fundamentally solves the environmental protection problem of alcohol industry. Simultaneously, the present invention enhances powder slurry concentration and alcohol concentration after fermentation liquid is fermented, realizes the high concentration fermentation of the alcohol, realizes barmy comprehensive utilization, obtains a large amount of by-product fodder and yeast protein products, and greatly improves the economic benefit of the alcohol industry.

Description

A kind of clean process for preparing alcohol

The invention belongs to the technical field of fermentative Production alcohol.

At present, the technical process by starchy material fermentative Production alcohol is a kind of general traditional method.Liquefied starch does not separate with slag when being characterized in fermenting, and the wine degree only is 6.5-8% during inoculation distiller's yeast secondary fermentation liquid fermentation ends.For this reason, have following serious problems in process of production: 1, produce a large amount of spent washs, the COD value is about 4-5 ten thousand, is difficult to handle, and environmental pollution is very big.2, in the technological process, distillery yeast and vinasse mix, and can't separate, and can not fully utilize.3, in the technological process, during distilled spirit, owing to there are vinasse to exist, so distillation efficiency is low, and stifled tower phenomenon appears easily.Therefore powder slurry concentration is limited in about 20%, can not increase again.

The objective of the invention is to propose a kind of new clean process for preparing alcohol, filter residue is isolated in employing earlier before fermentation, thereby make novel process can not produce a large amount of spent washs, fundamentally solve the environmental issue of alcohol industry, also obtain a large amount of by product feeds and Yeast protein goods etc. simultaneously, improve the economic benefit of alcohol industry greatly.

Content of the present invention is: technological process of production block diagram is shown in figure one and figure two.After starchy material powder slurry adds α-amylase liquefaction,, make feed after isolating filter residue and drying, and the liquefier after filtering just enters the fermentation procedure of back through filtering.Major technique feature following points: 1, Jia Shui sizes mixing, and powder and water weight ratio are 1: 3---and 2.3, promptly powder slurry concentration can bring up to 25---and 30%.And traditional technology powder and water weight ratio are 1: 4, and powder slurry concentration only is 20%.2, the logical 2.5Kg vapo(u)r blasting liquefaction of the slurried employing squirt pump of powder, about 105 ℃ of temperature.And traditional technology adopts logical 135-140 ℃ high pressure steam to carry out boiling liquefaction.3, the slurried laggard andante frame of powder filters, after the filter residue and drying the by product feed, filtrate enters the back fermentation procedure, and the traditional technology powder does not filter after slurried, liquid does not separate with slag, enters the back fermentation procedure simultaneously.4, during inoculation distiller's yeast secondary fermentation liquid fermentation ends, the alcohol ultimate density can bring up to 10%, and the wine degree only is 6.5% during the fermented liquid fermentation ends of traditional technology---and 8%.5, zymamsis finishes, can not produce the high spent wash of COD, it is product alcohol that alcohol mother liquor after the fermentation adopts direct distillation, distillate, slightly heat up in a steamer mother liquor and after concentration, obtain by product feed or Yeast protein goods, or the alcohol mother liquor after the fermentation carries out alcohol, yeast separation, treated then product alcohol and by product feed or the Yeast protein goods of obtaining respectively.Distillery yeast liquid can be fully utilized by the method for scheme one or scheme two, obtain product alcohol and pay product feed or yeast albumen powder.Scheme one is to adopt direct distillation, and distillate is a product alcohol, slightly heats up in a steamer mother liquor and get by product after concentration; Scheme two is first with alcohol, yeast separation, treated then product alcohol and the by product of obtaining respectively.And traditional technology obtains outside the product alcohol, also can produce the high spent wash of reluctant COD.6, in distillery yeast liquid comprehensive utilization process, slightly heating up in a steamer mother liquor adopts the multiple-effect vacuum concentration to concentrate, the condensate temperature that vacuum hydro-extraction therebetween steams reaches 75-80 ℃, can be used as spice water or boiler feed water and reuse, reaches the effect of economizing on water and making full use of heat energy.

Technology of the present invention is suitable for the distillery yeast that son uses at present both at home and abroad, as the Angel alcohol active dried yeast, K---yeast, 1300 distillery yeasts, Sb724 distillery yeast, grain wine distillery yeast, high temperature K-yeast, and the motion Zymomonas mobilis (bacterium) that is applied to ferment etc.

Technology of the present invention is applicable to that rice, corn, jowar, sweet potato are done, cassava and wild starch raw material acorn nut, arrowroot, Chinese yam, crust any of several broadleaf plants an ancient wind instrument etc.

Advantage of the present invention: main is to have overcome the problem that produces spent wash in the Alcohol Production, has promptly fundamentally solved the environmental issue of alcohol industry.Also have following advantage on the technology: 1, powder slurry concentration can be brought up to 25-30% from 20%, and fermented liquid fermentation back ethanol concn brings up to 10% from 6.5-8%, and what have brings up to more than 1.5 times, has realized the high gravity fermentation of alcohol, has improved production efficiency greatly.2, can obtain a large amount of by products: feed and Yeast protein goods, improved the economic benefit of alcohol industry greatly.3, can reduce the water resources consumption of Alcohol Production greatly, as reducing the steam consumption of powder when slurried; Because of solved at all produce in the stifled tower phenomenon of topping still, steam consumption when having reduced distillation, improved saccharification, fermentation, distillation plant utilization ratio; The all right reuse of the water of condensation that the multiple-effect vacuum concentration steams, water saving, joint heat energy can reduce cost in a word.

Embodiment 1:

Weigh 300 gram rice meals, about 40 orders of fineness, add the water back constant volume to 1000 milliliter of sizing mixing, add 10 units/gram α---amylase, be heated to 97 on the electric furnace---20 minutes (industrial employing steam ejection liquefaction) of 100 ℃ of liquefaction, after the detection of iodine liquid is qualified, adds tap water and supply 1000 milliliters, filter with B and obtain liquefier (industrial employing filter press).

Adorn 20 milliliters of above-mentioned liquefiers in 250 milliliters of triangular flasks, the urea dissolving that adds 0.1% (m/m) ratio is even, as seed culture fluid.In 60 ℃ of water-baths, in this triangular flask, add 100 units/gram saccharifying enzyme, premashing 1.5 hours, premashing finish postcooling to 32 and ℃ inoculate.

Inoculum size is a platinum loop, and this example adopts high temperature K-yeast as experimental strain, inserts the fermentation triangular flask after 24 hours with 250 rev/mins of shake-flask culture on 32 ± 2 ℃ of shaking tables, and this moment, total cellular score was about 1.2-1.5 hundred million/milliliter.

Fermentation triangular flask preparation: in 250 milliliters of triangular flasks, adorn 200 milliliters of liquefiers, in the time of 60 ℃, add 100 units/gram saccharifying enzyme, do not add nutritions such as urea.Be cooled to 32 ℃, insert seed liquor, fermentation was measured after 60 hours in 32 ± 2 ℃ of incubators, residual sugar＜0.1%, and the wine degree reaches 10.05%.

Embodiment 2

Weigh 250 gram Semen Maydis powder, about 20 orders of fineness, add and be settled to 1000 milliliters after water is sized mixing, add 10 units/gram α-amylase, 100 ℃ of liquefaction are after 10 minutes, again in 5 minutes postcooling to 100 of 120 ℃ of sterilizations ℃, add again and add behind 20 units/gram α-amylase after tap water supplies 1000 milliliters, filter the corn liquefier.

Inoculum size one platinum loop, this example adopt K-yeast 24 hour after to insert fermentation triangular flask with 250 rev/mins of shake-flask culture as experimental strain on 32 ± 2 ℃ of shaking tables, and this moment, total cellular score was about 1.0 hundred million/milliliter.

200 milliliters of liquefiers are adorned in the preparation of fermentation triangular flask in 250 milliliters of triangular flasks, in the time of 60 ℃, add 100 units/gram saccharifying enzyme, do not add nutritions such as urea.Be cooled to 32 ℃ and insert seed liquor, fermentation was measured after 60 hours in 32 ± 2 ℃ of incubators, residual sugar＜0.1%, and the wine degree reaches 8.05%.

Claims

1, a kind of method of fermentative Production alcohol, after it is characterized in that starchy material powder slurry adds α-amylase liquefaction, through filtering, make feed after isolating filter residue and drying, and the liquefier after filtering just enters the fermentation procedure of back, alcohol mother liquor after the fermentation adopts direct distillation, distillate is a product alcohol, slightly heat up in a steamer mother liquor and after concentration, obtain by product feed or Yeast protein goods, or the alcohol mother liquor after the fermentation carries out alcohol, yeast separation, treated then product alcohol and by product feed or the Yeast protein goods of obtaining respectively do not produce the high vinasse water of COD in the process.

2, the method for claim 1 is characterized in that powder slurry concentration is up to 30%.

3, the method for claim 1 is characterized in that fermented liquid alcohol ultimate density is up to 10%.

4, the method for claim 1 is characterized in that adopting when powder is slurried squirt pump to lead to the vapo(u)r blasting liquefaction mode of steam, logical 2.5kg vapo(u)r blasting liquefaction.

5, the method for claim 1 is characterized in that raw material is that rice, corn, jowar, sweet potato are done, cassava, acorn nut, arrowroot, Chinese yam or crust edible canna.