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 reproducti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1:

[0033] An acid-free fermentation method for producing alcohol from starchy raw materials includes the following steps:

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

[0035] (2) Wet pulverization of fresh cassava: the fresh cassava is subjected to secondary wet pulverization to obtain a slurry of fresh cassava. The weight ratio of fresh cassava to water is 7:5;

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

[0037] Heat up and cook the slurry of the raw material obtained in step (2), the cooking temperature is 90°C, the cooking time is 3h, and the liquefied mash is obtained after cooking and liquefaction;

[0038] (4) Saccharification;

[0039] The temperature of the liquefied mash obtained in step (3) is cooled to below 60°, and then sent to the saccharification tank, 0.1kg of saccharification enzyme is added to each cubic meter of liquefied mash, the saccharification temperature is maintained at 56°C, and the saccharification time is 60min to obtain a s...

Example Embodiment

[0046] Example 2:

[0047] An acid-free fermentation method for producing alcohol from starchy raw materials includes the following steps:

[0048] (1) Washing and peeling of raw materials: Wash fresh cassava and potatoes separately;

[0049] (2) Wet pulverization of raw materials: Mix fresh cassava and potatoes for secondary wet pulverization to obtain a mixed slurry of fresh cassava and potatoes. 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 raw materials obtained in step (2) is heated and cooked, the cooking temperature is 95°C, the cooking time is 2.75h, and the liquefied mash is obtained after cooking and liquefaction;

[0052] (4) Saccharification;

[0053] The temperature of the liquefied mash obtained in step (3) is lowered to below 60°, and then sent to the saccharification tank, 0.2kg of saccharification enzyme is added to each cubic meter of liquefied mash, the sa...

Example Embodiment

[0060] Example 3:

[0061] An acid-free fermentation method for producing alcohol from starchy raw materials includes the following steps:

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

[0063] (2) Wet pulverization of raw materials: all raw materials are mixed for one-stage 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] The mixed slurry of raw materials obtained in step (2) is heated and cooked, the cooking temperature is 100°C, and the cooking time is 2.5h. After cooking and liquefaction, a liquefied mash is obtained;

[0066] (4) Saccharification;

[0067] The temperature of the liquefied mash obtained in step (3) is cooled to below 60°, and then sent to the saccharification tank, 0.3kg of saccharification enzyme is added to each cubic meter of liquefied mash, th...

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PUM

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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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