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Method for preparing ethyl alcohol with potatoes

A technology of ethanol and potatoes, which is applied in the field of ethanol preparation, can solve the problems of reducing starch waste and alcohol yield, and achieves the effects of saving water resources, less amount of mixed starch, and high separation efficiency

Active Publication Date: 2011-05-11
CHINA LIGHT IND XIAN DESIGN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method of preparing ethanol from potatoes, the sand removal rate is only about 30%, and a large amount of starch mixed with the sand is also discarded together with the sand, resulting in starch waste and lower alcohol yield.

Method used

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  • Method for preparing ethyl alcohol with potatoes
  • Method for preparing ethyl alcohol with potatoes
  • Method for preparing ethyl alcohol with potatoes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pretreatment: remove the sundries and moldy parts in the dried cassava, crush them, and pass through a 1.5mm sieve to obtain cassava flour;

[0027] Mixing material: In the mixing tank, mix cassava flour and 60°C hot water according to 1:3.158, and add α-amylase at the same time, the ratio is 1g of cassava flour and 17 μg of α-amylase, stir evenly, and enter the liquefaction tank;

[0028] Liquefaction: heat up to 90°C under stirring, then add α-amylase, the ratio is 1g tapioca flour to 33μg α-amylase, continue to stir, liquefy for 50 minutes, get liquefied slurry, enter the sand-water separator;

[0029] Sand removal: keep the liquefied slurry at 85°C, stir and settle at a stirring speed of 30r / min, then separate the sand, and wash the sand twice with 90°C hot water. The overflowed supernatant is saccharified, fermented and distilled to obtain ethanol.

[0030] Finally, the sand was weighed dry, and the sand removal efficiency was calculated to be 95%.

Embodiment 2

[0032] Pretreatment: remove the sundries and moldy parts in the dried potatoes, crush them, and pass through a 1.5mm sieve to obtain cassava flour;

[0033] Mixing material: mix potato flour and 65°C hot water according to a certain material ratio (the material ratio is 1:2.809), and add α-amylase at the same time, the ratio is 1g potato flour and 17μg α-amylase, stir evenly, enter liquefaction tank;

[0034] Liquefaction: heat up to 105°C under stirring, then add α-amylase, the ratio is 1g cassava flour, add 40μg α-amylase μg / g cassava flour, continue to stir, liquefy for 1h, get liquefied slurry, enter sand-water separation device;

[0035] Sand removal: keep the liquefied slurry at 95°C, use three-stage sand removal, stir and settle at a stirring speed of 40r / min, then separate the sand, and wash the sand twice with 90°C hot water. The overflowed supernatant is saccharified, fermented and distilled to obtain ethanol.

[0036] Finally, the sand was weighed dry, and the sa...

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Abstract

The invention relates to the ethanol preparation field, and discloses a method for preparing ethanol through tuber crops. The method is based on an ethanol preparation device. The invention is characterized in that: the preparation method comprises the following steps of preprocessing; mixing materials; liquefying; desanding; and generating ethanol. The method arranges the desanding step behind the liquefying step and adopts a three-stage desanding process with reasonable process layout, obvious desanding effect and high ethanol yield.

Description

technical field [0001] The invention relates to the field of ethanol preparation, in particular to a method for preparing ethanol from potatoes. Background technique [0002] At present, the production of fuel ethanol with dried cassava or dried potato as raw material has the problem of slurry removal. The general slurry desanding process adopts ditch or groove for manual intermittent desanding process, and the desanding step is selected after the dry potato powder is mixed. In the method of preparing ethanol from potatoes, the sand removal rate is only about 30%, and a large amount of starch mixed with the sand is also discarded together with the sand, resulting in waste of starch and reduction of alcohol yield. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing ethanol from potatoes, which can increase the removal rate of sand from the current 30% to more than 90%, reduce the waste of starch, and increase the yie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/10C12M1/02C12M1/00
CPCY02E50/10
Inventor 刘建文李江辉王新刚
Owner CHINA LIGHT IND XIAN DESIGN ENG
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