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Acid-free fermentation method of using starchy raw material to produce alcohol

A starchy raw material, acid-free fermentation technology, applied in fermentation, biofuels, etc., can solve the threat to the personal safety of operators, increase the sulfate content of waste liquid, and increase the difficulty of environmental protection treatment, etc., achieving significant energy saving effects, reducing Desulfurization cost, beneficial effect on growth

Active Publication Date: 2017-05-10
台州中知英健机械自动化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of sulfuric acid, it will cause corrosion to the equipment, increase the sulfate content of the waste liquid, and increase the difficulty of environmental protection treatment; at the same time, the low pH value will also be unfavorable to the growth and reproduction of yeast
In addition, sulfuric acid is a very dangerous corrosive product, which poses a threat to the personal safety of operators.
[0003] The existing acid-free fermentation technology takes a long time to ferment, which will result in a long process cycle and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An acid-free fermentation method for producing ethanol with starchy raw materials, comprising the following steps:

[0034] (1) cleaning and peeling of fresh cassava;

[0035] (2) wet crushing of fresh cassava: carry out secondary wet crushing of fresh cassava to obtain the slurry of fresh cassava, and the weight ratio of fresh cassava to water is 7:5;

[0036] (3) Low-temperature cooking of raw materials;

[0037] Cooking the slurry of the raw material obtained in step (2) at a temperature of 90° C. for 3 hours, and obtaining liquefied mash after cooking and liquefied;

[0038] (4) saccharification;

[0039] Cool the liquefied mash obtained in step (3) to below 60°, then send it into the mash tank, add 0.1 kg of glucoamylase to each cubic meter of liquefied mash, keep the saccharification temperature at 56°C, and saccharify for 60 minutes to obtain mash liquid;

[0040] (5) acid-free fermentation;

[0041] Cool the saccharification mash obtained in step (4) to bel...

Embodiment 2

[0047] An acid-free fermentation method for producing ethanol with starchy raw materials, comprising the following steps:

[0048] (1) Cleaning and peeling of raw materials: fresh cassava and potatoes are cleaned and peeled respectively;

[0049] (2) Wet crushing of raw materials: fresh cassava and potatoes are mixed for secondary wet crushing to obtain a mixed slurry of fresh cassava and potatoes, and the weight ratio of fresh cassava and potato raw materials to water is 7:4.5;

[0050] (3) Low-temperature cooking of raw materials;

[0051] The mixed slurry of the raw materials obtained in step (2) is heated up and cooked, the cooking temperature is 95°C, the cooking time is 2.75h, and the liquefied mash is obtained after cooking and liquefied;

[0052] (4) saccharification;

[0053] Cool the liquefied mash obtained in step (3) to below 60°, then send it into the mash tank, add 0.2 kg of glucoamylase to each cubic meter of liquefied mash, keep the saccharification temperatu...

Embodiment 3

[0061] An acid-free fermentation method for producing ethanol with starchy raw materials, comprising the following steps:

[0062] (1) Cleaning and peeling of raw materials: cassava, corn, sweet potato, potato, rice and wheat are cleaned and peeled respectively;

[0063] (2) Wet pulverization of raw materials: all raw materials are mixed for primary wet pulverization to obtain a mixed slurry of raw materials, and the weight ratio of raw materials to water is 7:4;

[0064] (3) low-temperature cooking of raw materials;

[0065] Cooking the mixed slurry of the raw materials obtained in step (2) at a temperature of 100° C. for 2.5 hours, and obtaining liquefied mash after cooking and liquefied;

[0066] (4) saccharification;

[0067] Cool the liquefied mash obtained in step (3) to below 60°, then send it into the mash tank, add 0.3 kg of glucoamylase to each cubic meter of liquefied mash, keep the saccharification temperature at 60°C, and saccharify for 50 minutes to obtain mash...

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Abstract

The invention discloses an acid-free fermentation method of using a starchy raw material to produce alcohol and belongs to the field of alcohol production. The method includes following steps: (1), cleaning the raw material; (2), subjecting the raw material to wet-process smashing to obtain size; (3), steaming the raw material at low temperature: steaming the raw material size at 90-100 DEG C for 2.5-3h to obtain liquefied mash; (4), saccharifying: adding 0.1-0.3kg of saccharifying enzyme into each cubic meter of the liquefied mash, and saccharifying at 56-60 DEG C for 50-60min to obtain saccharified mash; (5), performing acid-free fermentation: adding yeast accounting for 0.01-0.1% of weight of the raw material, and fermenting at 31-33 DEG C for 50-60h to obtain mature mash; (6), distilling to obtain edible alcohol; (7), adsorbing through a molecular sieve to obtain anhydrous alcohol. By the acid-free fermentation method, fermentation time is shortened, bacterial breeding is effectively inhibited or interfered for acid-free fermentation, and fermentation efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of alcohol production, in particular to an acid-free fermentation method for producing alcohol with starchy raw materials. Background technique [0002] In the traditional alcohol fermentation process, methods such as acidification with sulfuric acid and heat sterilization are usually used to inhibit miscellaneous bacteria. Heat sterilization can kill miscellaneous bacteria, but it requires additional equipment, consumes a lot of steam, has high operating costs, and is likely to cause sugar loss, so it is rarely used. Most of the current ethanol production processes adopt the method of acidification and acidification, and use sulfuric acid to adjust the pH value of the mash to 3.2-3.8 to inhibit the growth of miscellaneous bacteria. Due to the large amount of sulfuric acid, it will cause corrosion to the equipment, increase the sulfate content of the waste liquid, and increase the difficulty of environmenta...

Claims

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Application Information

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IPC IPC(8): C12P7/06
CPCC12P7/06Y02E50/10
Inventor 谢永卫
Owner 台州中知英健机械自动化有限公司
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