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Method for preparing ethanol by using fresh potatoes

A potato and ethanol technology, applied in the field of ethanol production, can solve the problems of not introducing ethanol technology and large planting area, and achieve the effect of abundant raw materials, low cost and low cost

Inactive Publication Date: 2010-05-12
张建旺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potatoes and sweet potatoes are widely planted all over the world. Now people mainly use fresh potatoes to make various foods, and they have not been introduced into the technical field of ethanol production.

Method used

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  • Method for preparing ethanol by using fresh potatoes
  • Method for preparing ethanol by using fresh potatoes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the method for making ethanol with fresh potatoes, is prepared according to the following steps (preparation by weight):

[0015] Step 1: Grind 100 servings of fresh sweet potatoes into a paste;

[0016] Step 2: Add 30 parts of water to the above paste, heat up to 70°C while stirring, add 5000u / kg fresh potato a-amylase, keep the temperature at 70°C, liquefy for 30 minutes, and cool to 30°C;

[0017] Step 3: Add 6000u / kg fresh sweet potato glucoamylase, 4000u / kg fresh sweet potato cellulase, 1.0g / kg fresh sweet potato urea, and 30ml / kg fresh sweet potato activation to the liquid cooled to 30°C Yeast liquid, kept at 30°C, fermented for 6 days;

[0018] The fourth step: filter the above-mentioned fermentation liquid, use the filter residue as feed directly, then distill the filtrate, the temperature is controlled at 80°C, the effluent is ethanol, and the remaining waste water is used to clean fresh potatoes;

Embodiment 2

[0019] Embodiment 2: the method for making ethanol with fresh potatoes, prepared according to the following steps (preparation by weight):

[0020] Step 1: Grind 100 servings of fresh potatoes into a paste;

[0021] Step 2: Add 45 parts of water to the above paste, heat up to 78°C while stirring, add 5000u / kg fresh potato a-amylase, keep the temperature at 78°C, liquefy for 30 minutes, and cool to 32°C;

[0022] Step 3: Add 6000u / kg fresh potato glucoamylase, 4000u / kg fresh potato cellulase, 1.0g / kg fresh potato urea, 30ml / kg fresh potato urea to the liquid cooled to 32°C. The activated yeast solution of fresh potatoes is kept at 32°C and fermented for 6 days;

[0023] The fourth step: filter the above-mentioned fermentation liquid, use the filter residue as feed directly, then distill the filtrate, the temperature is controlled at 85°C, the effluent is ethanol, and the remaining waste water is used for cleaning fresh potatoes;

Embodiment 3

[0024] Embodiment 3: the method for making ethanol with fresh potatoes, prepared according to the following steps (preparation by weight):

[0025] Step 1: Grind 100 servings of fresh sweet potatoes into a paste;

[0026] Step 2: Add 50 parts of water to the above paste, heat up to 80°C while stirring, add 5000u / kg fresh potato a-amylase, keep liquefaction at 80°C for 30min, and cool to 35°C;

[0027] Step 3: Add 6000u / kg fresh sweet potato glucoamylase, 4000u / kg fresh sweet potato cellulase, 1.0g / kg fresh sweet potato urea, and 30ml / kg fresh sweet potato activated yeast to the above liquid cooled to 35°C liquid, the temperature was kept at 35°C, and the fermentation was done for 6 days;

[0028] The fourth step: filter the above-mentioned fermentation liquid, use the filter residue as feed directly, then distill the filtrate, the temperature is controlled at 100°C, the effluent is ethanol, and the remaining waste water is used to clean fresh potatoes;

[0029] The fresh pot...

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Abstract

The invention relates to a method for preparing ethanol by using fresh potatoes, which belongs to the technical field of ethanol preparation. The invention provides the method for preparing the ethanol by using the fresh potatoes, and adopted technical scheme comprises that the method comprises the following steps (in art by weight): firstly, grinding 100 parts of the fresh potatoes into a paste; secondly, adding water into the paste, raising the temperature to between 70 and 80 DEG C while stirring the paste, adding an alpha-amylase of the fresh potatoes into the paste, keeping the temperature between 70 and 80 DEG C, liquefying the paste for 30 minutes, and cooling the liquefied paste to a temperature of between 30 and 35 DEG C; thirdly, simultaneously adding a saccharifying enzyme of the fresh potatoes, a cellulase of the fresh potatoes, urea of the fresh potatoes and an activating yeast solution of the fresh potatoes into the liquefied paste, keeping the temperature between 30 and 35 DEG C and performing fermentation; and fourthly, filtering the fermentation liquor, using filter residues as a feedstuff directly, then distilling the filtrate to obtain a distillate which is the ethanol, and using the remaining wastewater for cleaning the fresh potatoes, wherein the fresh potatoes refer to white potatoes or sweet potatoes. The method is applied to the technical field of preparing the ethanol.

Description

technical field [0001] The invention discloses a method for producing ethanol from fresh potatoes, belonging to the technical field of ethanol production. Background technique [0002] Fresh potatoes, such as potatoes and sweet potatoes, are planted all over our country and belong to high-yield crops. The yield per mu can reach 2-4 tons, and the tubers contain 20%-30% starch. Potatoes and sweet potatoes have a large planting area all over the world. Now people mainly use fresh potatoes to make various foods, and they have not been introduced into the technical field of ethanol production. [0003] The structural formula of ethanol is CH 3 CH 2 OH, commonly known as alcohol, is a flammable, volatile, colorless and transparent liquid at normal temperature and pressure. Its aqueous solution has a special, pleasant fragrance and is slightly irritating. Ethanol has a wide range of uses. Ethanol can be used to make acetic acid, beverages, flavors, dyes, fuels, etc. Ethanol wi...

Claims

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Application Information

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IPC IPC(8): C12P7/06A23K1/06C12R1/85A23K10/38
CPCY02E50/17Y02E50/10Y02P60/87
Inventor 张建旺张立航李艳平
Owner 张建旺
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