Method for preparing ethanol from yam raw materials

A potato and raw material technology, which is applied in the field of ethanol preparation, can solve the problems of wastewater not meeting environmental requirements, high pressure of wastewater treatment, and low ethanol yield, and achieve the effects of increasing yield, reducing COD value, and reducing pressure

Active Publication Date: 2009-11-25
COFCO GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings of the low ethanol yield of the existing method for preparing ethanol from potato raw materials and the high pressure of wastewater treatment in the treatment method of waste liquid after fermentation and the inability of the treated wastewater to meet the requirements of the environment, and provide A method for preparing ethanol using tuber raw materials that can effectively increase the yield of ethanol and significantly reduce the pressure of wastewater treatment, and the treated wastewater can meet environmental requirements

Method used

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  • Method for preparing ethanol from yam raw materials
  • Method for preparing ethanol from yam raw materials
  • Method for preparing ethanol from yam raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This example is used to illustrate the method for preparing ethanol using cassava raw material of the present invention.

[0069] (1) Peeling and crushing of cassava raw materials

[0070] Prepared as follows figure 1 , 2 and the peeling device shown in 3.

[0071] The drum 2 includes a first segment drum 2a and a second segment drum 2b from top to bottom, the first segment drum 2a and the second segment drum 2b are connected, and the lengths of the first segment drum 2a and the second segment drum 2b are respectively 1.8 meters and 1.6 meters; the drum 2 is made of steel with an inner diameter of 1.6 meters; 40 hot-rolled ribbed steel bars with a length of 1.5 meters are fixed on the inner wall of the first section drum 2a (the brand is HRB335, and the nominal diameter is 12 mm ), each hot-rolled ribbed steel bar is parallel to the central axis of the drum, each hot-rolled ribbed steel bar is distributed at equal intervals along the circumference of the inner wall o...

Embodiment 2

[0097] This example is used to illustrate the method for preparing ethanol using cassava raw material of the present invention.

[0098] Prepare ethanol according to the method for Example 1, the difference is that in step (4), 5 tons of waste liquid with a water content of 93.5% by weight is added to a membrane filter press (Jingjin Filter Press Group Co., Ltd., X M A ZG600 / 1500×2000U B K ) to filter, the number of common filter plates in the diaphragm filter press is 60, the number of diaphragm filter plates is 60, and the common filter plates are arranged at intervals with the diaphragm filter plates; the conditions of the filtration include the pressure of filtration is 0.4 MPa, and the time of filtration is 8 hours to obtain a filter cake; fill the squeeze medium air in the diaphragm filter plate, and squeeze the filtered filter cake, the pressure of the squeeze is 25 MPa, and the time of squeezing is 25 MPa. After 0.2 hours, waste water A2 after solid-liquid separatio...

Embodiment 3

[0113] This example is used to illustrate the method for preparing ethanol using cassava raw material of the present invention.

[0114] Prepare ethanol according to the method for embodiment 1, difference is, when adopting the peeling equipment of embodiment 1 to carry out peeling, after starting motor, make cylinder 2 and screw feeder 3 rotate around the central axis of cylinder (rotating speed is 12 rev / min); 100 kilograms of fresh cassava (thick 4-8 ​​centimeters, long 20-30 centimeters, water content 65 weight %) that harvested 100 kilograms of surface cleanings are continuously added in the drum 2 through the feed port 4, and the cassava is in the drum Discharge from discharge port 5 after staying on average for 1.2 minutes, and collect and obtain 96.5 kilograms of peeled cassava raw materials.

[0115] The pulverized method comprises mixing 96.5 kilograms of peeled cassava chips with 48.5 kilograms of water, and using the SFSP series hammer mill to pulverize the mixture...

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Abstract

The invention relates to a method for preparing ethanol from yam raw materials, which comprises the following steps: removing peels of the yam raw materials by using a yam peeling device; crushing the peeled yam raw material; mixing and enzymolyzing the crushed products and enzyme; fermenting the obtained enzymolysis products; separating the ethanol from the fermented products; performing solid-liquid separation on fermented waste liquid to obtain a filter cake and waste water; and performing waste water treatment on the obtained waste water, wherein the chemical oxygen demand value of the waste water obtained after separation is between 30,000 and 35,000 mg / L. the method provided by the invention can effectively improve the yield of the ethanol, obviously reduce the pressure for treating the waste water, make the treated waste water meet the requirement of the environment.

Description

technical field [0001] The invention relates to a method for preparing ethanol, more particularly to a method for preparing ethanol by using tuber raw materials. Background technique [0002] Potatoes, such as sweet potatoes, potatoes, cassava, etc., are rich in starch, so they are widely used in the fields of fermentation sugar and starch production. [0003] Cassava is one of the three largest tuber crops in the world and is the preferred raw material for the production of bioethanol. Cassava is a tropical and subtropical perennial and temperate annual tuber shrub. It is native to South America and is suitable for growth in low latitude areas with an average temperature of 25-29°C and an average annual precipitation of 1000-1500 mm. About 1820 years ago, cassava spread to southern China and was mainly grown in Guangdong, Guangxi and Hainan, and now gradually expanded to Yunnan, Fujian, Guizhou and other provinces. There are two types of cassava: bitter cassava (poisonous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06A23N7/02
CPCY02E50/17Y02E50/10
Inventor 姜勇柳树海任连彬贾成国张永新刘清勋罗虎于天杨
Owner COFCO GROUP
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