Method for producing ethanol by utilizing bagasse hemicellulose

A technology of hemicellulose and cellulase, which is applied in the field of bagasse hemicellulose to produce ethanol, can solve problems such as ineffective utilization, and achieve a win-win situation in environmental and economic benefits, reduce production costs, and improve comprehensive economic benefits. Effect

Inactive Publication Date: 2016-09-07
张聪聪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of ethanol production, the cellulose in the bagasse fiber raw material is mainly used, and most of the hemicellulose and lignin will be dissolved in the treatment liquid during pretreatment and cannot be effectively utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for producing ethanol from bagasse hemicellulose described in the present embodiment mainly comprises the following steps:

[0027] (1) Bagasse pretreatment: the bagasse pretreatment is to mix bagasse and sugarcane tail tips, pulverize them with a pulverizer, pass through a 40-80 mesh screen, and the weight ratio of bagasse to sugarcane tail tips is 6:2, and then The pulverized mixture is immersed in a sulfuric acid solution with a mass fraction of 0.1% for treatment, the solid-to-liquid ratio is 1:10, steamed at 170°C for 2-10 minutes, and filtered to obtain a bagasse hemicellulose extract;

[0028] (2) Detoxification treatment of bagasse hemicellulose extract: add calcium oxide to the bagasse hemicellulose extract to adjust the pH of the hydrolyzate to 9, then heat the hydrolyzate to 50°C, keep it warm for 20-30 minutes, filter, and pass the hydrolyzate through Activated carbon adsorption, and then adjust the pH to 5.5-6.0 with sulfuric acid;

[0029] (3) ...

Embodiment 2

[0032] The method for producing ethanol from bagasse hemicellulose described in the present embodiment mainly comprises the following steps:

[0033] (1) Bagasse pretreatment: the bagasse pretreatment is to mix bagasse and sugarcane tail tips, pulverize them with a pulverizer, pass through a 40-80 mesh screen, and the weight ratio of bagasse to sugarcane tail tips is 7:2, and then The pulverized mixture is immersed in a sulfuric acid solution with a mass fraction of 0.5 for treatment, the solid-to-liquid ratio is 1:1418°C, steamed for 2-10 minutes, and filtered to obtain a bagasse hemicellulose extract;

[0034](2) Detoxification treatment of bagasse hemicellulose extract: add calcium oxide to the bagasse hemicellulose extract to adjust the pH of the hydrolyzate to 10, then heat the hydrolyzate to 55°C, keep it warm for 20-30 minutes, filter, and pass the hydrolyzate through Activated carbon adsorption, and then adjust the pH to 5.5-6.0 with sulfuric acid;

[0035] (3) Hydrol...

Embodiment 3

[0038] The method for producing ethanol from bagasse hemicellulose described in the present embodiment mainly comprises the following steps:

[0039] (1) Bagasse pretreatment: the bagasse pretreatment is to mix bagasse and sugarcane tail tips, pulverize them with a pulverizer, pass through a 40-80 mesh screen, and the weight ratio of bagasse to sugarcane tail tips is 6:3, and then The pulverized mixture is immersed in a sulfuric acid solution with a mass fraction of 0.8% for treatment, the solid-to-liquid ratio is 1:16, steamed at 19°C for 2-10 minutes, and filtered to obtain a bagasse hemicellulose extract;

[0040] (2) Detoxification treatment of bagasse hemicellulose extract: add calcium oxide to the bagasse hemicellulose extract to adjust the pH of the hydrolyzate to 11, then heat the hydrolyzate to 58°C, keep it warm for 20-30 minutes, filter, and pass through the hydrolyzate Activated carbon adsorption, and then adjust the pH to 5.5-6.0 with sulfuric acid;

[0041] (3) ...

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Abstract

The invention relates to a method for producing ethanol by utilizing bagasse hemicellulose. The method comprises the following steps of: pretreating bagasse, carrying out detoxification treatment on bagasse hemicellulose extracting solution, hydrolyzing the bagasse hemicellulose extracting solution and fermenting bagasse hemicellulose hydrolysate. Double enzyme saccharified bagasse hemicellulose and double yeast mixed strain are adopted for fermenting the bagasse hemicellulose diluted acid hydrolysate, the defect that the traditional saccharomyces cerevisiae can produce ethanol by utilizing glucose only while xylose fermentation can not be utilized is overcome, utilization rate of lignocellulosic materials is greatly improved, and the advantages of high ethanol yield, high conversion rate and the like are shown, so that the method provided by the invention is significant on production of bioethanol, comprehensive utilization of bagasse resource is realized, comprehensive economic benefit of a saccharose enterprise can be obviously improved, and double win in environmental benefit and economic benefit is realized.

Description

technical field [0001] The invention belongs to the fields of biochemical engineering, fermentation engineering and biomass energy, and in particular relates to a method for producing ethanol from bagasse hemicellulose. Background technique [0002] Bagasse is the largest by-product of sugarcane sugar mills, with a yield of 24%-27% of the processed sugarcane. my country is the third largest sugarcane planting country in the world, and the output of bagasse in the south reaches 7000 kt / a. Bagasse is a rich renewable biomass resource, and its main components are natural polymer substances such as cellulose, hemicellulose and lignin. Among them, hemicellulose is mainly xylan, which is polymerized from xylose and arabinose, while cellulose is a polymer of glucose. At present, except for a small amount of bagasse used for papermaking, most of them are burned or discarded, which not only causes waste of resources, but also seriously pollutes the environment. Therefore, if high-...

Claims

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Application Information

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IPC IPC(8): C12P7/10C12P19/14C12N9/42C12R1/885C12R1/685
CPCC12N9/2437C12N9/248C12P7/10C12P19/14C12P2201/00Y02E50/10
Inventor 张聪聪
Owner 张聪聪
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