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Ferment method of producing fuel ethanol using stalk material

A technology of fuel ethanol and fermentation method, applied in the direction of biofuel, fermentation, fuel, etc., can solve the problems of waste of resources, environmental pollution, low utilization level, etc., and achieve the effect of low cost

Inactive Publication Date: 2007-12-12
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is a large agricultural country with abundant plant fiber resources. The annual output of crop straw alone reaches 700 million tons. The current utilization method is mainly for cooking in rural areas, some of which are returned to the field, and a small amount is used as energy through gasification and solidification. Low level, serious waste of resources, serious environmental pollution

Method used

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Examples

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Effect test

Embodiment 1

[0018] The fermentation method for producing fuel ethanol from straw raw materials in this embodiment comprises the following steps:

[0019] (1) Selection of raw materials: crop straw, wheat straw, corn straw, rice straw;

[0020] (2) Pulverization: the stalks and straws are pulverized by a hammer mill and sieved into 20-40 mesh rice straw powder;

[0021] (3) Pretreatment: The raw material is subjected to lignin degradation treatment by white-rot fungus under solid-state culture and liquid crude enzyme;

[0022] (4) Double-enzyme saccharification: use cellulase and xylanase to saccharify straw under the conditions of 45°C, pH 4.5, 150rpm, and a liquid-solid ratio of 15 to obtain reducing sugars;

[0023] (5) Fermentation: use Pachysolen tannophilus As2.1585 to co-ferment pentose and hexose sugars in the straw saccharification solution to produce fuel ethanol, wherein the fermentation system is constructed as follows: add the following substances and their dosage to the stra...

Embodiment 2

[0026] The fermentation method for producing fuel ethanol from straw raw materials in this embodiment comprises the following steps:

[0027] (1) Selection of raw materials: crop straw, wheat straw, corn straw, rice straw;

[0028] (2) Pulverization: the stalks and straws are pulverized by a hammer mill and sieved into 20-40 mesh rice straw powder;

[0029] (3) Pretreatment: The raw material is subjected to lignin degradation treatment by white-rot fungus under solid-state culture and liquid crude enzyme;

[0030] (4) Double-enzyme saccharification: use cellulase and xylanase to saccharify straw under the conditions of 45°C, pH 4.5, 150rpm, and a liquid-solid ratio of 15 to obtain reducing sugars;

[0031] (5) Fermentation: use Pachysolen tannophilus As2.1585 to co-ferment pentose and hexose sugars in the straw saccharification solution to produce fuel ethanol, wherein the fermentation system is constructed as follows: add the following substances and their dosage to the stra...

Embodiment 3

[0034] The fermentation method for producing fuel ethanol from straw raw materials in this embodiment comprises the following steps:

[0035] (1) Selection of raw materials: crop straw, wheat straw, corn straw, rice straw;

[0036] (2) Pulverization: the stalks and straws are pulverized by a hammer mill and sieved into 20-40 mesh rice straw powder;

[0037] (3) Pretreatment: The raw material is subjected to lignin degradation treatment by white-rot fungus under solid-state culture and liquid crude enzyme;

[0038] (4) Double-enzyme saccharification: use cellulase and xylanase to saccharify straw under the conditions of 45°C, pH 4.5, 150rpm, and a liquid-solid ratio of 15 to obtain reducing sugars;

[0039] (5) Fermentation: use Pachysolen tannophilus As2.1585 to co-ferment pentose and hexose sugars in the straw saccharification solution to produce fuel ethanol, wherein the fermentation system is constructed as follows: add the following substances and their dosage to the stra...

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PUM

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Abstract

The invention relates to a method for preparing fuel ethanol by taking straw as raw material. It comprises following steps: (1) selecting crop straw as raw material; (2) disintegrating: disintegrating straw by using hammer mill, sifting and getting straw powder of 20- 40 order; (3) pre- treating: lignin degrading raw material by way of culturing white-rot fungi in solid culture medium and liquid enzyme; (4) saccharifying two enzymes, saccharifying straw by using cellulase and xylanase at 45 Deg. C, pH 4.5, 150 rmp and ratio between liquid and solid 15, getting reduced sugar; (5) fermenting; (6) distilling. The fuel ethanol productivity is 16.7% in this invention, that is 16.7 ton waterless ethanol with every 100 ton straw, the production efficiency is high and economic benefit and social benefit is pretty good. Compared with current process, this invention is characterized in that the fermentation is thorough and the fuel ethanol production cost is low.

Description

technical field [0001] The invention relates to a fermentation method for producing fuel ethanol, in particular to a fermentation method for producing fuel ethanol from straw raw materials. Background technique [0002] my country is a large agricultural country with rich plant fiber resources. The annual output of crop straw alone reaches 700 million tons. The current utilization method is mainly for cooking in rural areas, some of which are returned to the field, and a small amount is used as energy through gasification and solidification. The level is low, the waste of resources is serious, and the environmental pollution caused is serious. In the context of the serious crisis and serious environmental pollution caused by traditional fossil energy such as coal and oil, fuel ethanol has attracted the attention of the government and society for its advantages such as renewable, non-environmental pollution, and technical clearance in motor vehicles. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C10L1/02
CPCY02E50/16Y02E50/10
Inventor 张百良宋安东
Owner HENAN AGRICULTURAL UNIVERSITY
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