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Method for pretreating ethyl alcohol produced from corn straws

A corn stalk and pretreatment technology, which is applied in the direction of biofuel and fermentation, can solve the problems of long microbial fermentation cycle, low efficiency, and inability to industrial production, and achieve high pretreatment effect, reduce production cost, and increase sugar production rate Effect

Inactive Publication Date: 2015-09-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these microorganisms have a long fermentation cycle and low efficiency, so they cannot be produced industrially.

Method used

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  • Method for pretreating ethyl alcohol produced from corn straws
  • Method for pretreating ethyl alcohol produced from corn straws
  • Method for pretreating ethyl alcohol produced from corn straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material selection: the corn stalk used in the present invention is taken from the northeast region of my country.

[0026] 1. Instrument:

[0027] Plant grinder, precision electronic balance, muffle furnace, water bath, blast drying oven, circulating water vacuum pump, rapid moisture analyzer, electric heating plate, DR5000 spectrophotometer, Soxhlet extractor.

[0028] 2 Raw materials and processing:

[0029] Corn stalks are taken from Changchun, Jilin Province, my country, representative raw materials are randomly selected, mechanically crushed to 3-5 cm, and air-dried in a natural state until the moisture content is less than 10%. It is stored in a plastic bag under normal temperature and dry environment to balance the moisture, and is used for subsequent determination and analysis of the chemical composition of bagasse and pretreatment.

[0030] 3. Results:

[0031] The chemical composition analysis results of the corn stover of the variety are listed in Table 1 below.

...

Embodiment 2

[0038] Neutral steam explosion pretreatment of corn stover

[0039] 1. Instrument:

[0040] Steam explosion device; Olympus BX51 biological microscope; Carl Zeiss EVO18 scanning electron microscope; IC 5000 ion chromatograph; Metso FS-300 automatic fiber analyzer; Micro Meritics ASAP2020 automatic specific surface area pore analyzer.

[0041] 2. Raw materials and processing:

[0042] The corn stalk powder obtained in Example 1 was balanced with moisture and subjected to neutral steam explosion pretreatment. After the hydrolysis reaction, the explosion sample and the hydrolysate were centrifuged, and the samples and hydrolysate were collected separately for subsequent analysis (see Table 2 for specific parameters) ); After processing, the blasted sample and the hydrolysate are centrifuged, the filtrate is used for the analysis of sugar components, and the substrate is placed in a sealed plastic bag to balance the moisture, and then used for the analysis yield. Then take a representati...

Embodiment 3

[0060] Pretreatment of Corn Stalk by Weak Acidic Medium Pressure Steam Explosion

[0061] 1. Instrument:

[0062] Steam explosion device; Olympus BX51 biological microscope; Carl Zeiss EVO18 scanning electron microscope; IC 5000 ion chromatograph; Metso FS-300 automatic fiber analyzer; Micro Meritics ASAP2020 automatic specific surface area pore analyzer.

[0063] 2. Raw material pretreatment:

[0064] The corn stalk powder obtained in Example 1 was balanced with moisture, water and acid were added, and the weak acid medium pressure steam explosion pretreatment was performed. After the hydrolysis reaction, the explosion sample and the hydrolysate were centrifuged to separate the samples and the hydrolysate for subsequent use For analysis (see Table 5 for parameters); after processing, centrifuge the blasted sample and the hydrolysate. The filtrate is used for the analysis of carbohydrate components, and the substrate is put into a sealed plastic bag to balance the moisture for analysi...

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Abstract

The invention discloses a method for pretreating ethyl alcohol produced from corn straws. The method comprises the following steps: taking corn straws as a raw material, pulverizing the corn straws, and conducting air drying to obtain corn straw powder; balancing moisture in the corn straw powder, adding water and acid liquor, conducting slightly acidic medium pressure steam explosion pretreatment, after hydrolysis reaction is finished, conducting centrifugal separation on the exploded sample and hydrolysate, and separately collecting a sample a and a hydrolysate I; balancing moisture in the corn straw powder, conducting neutral steam explosion pretreatment, after hydrolysis reaction is finished, conducting centrifugal separation on the exploded sample and hydrolysate, and separately collecting a sample b and a hydrolysate II; washing the sample a and the sample b subjected to prehydrolysis to be clean, and mixing so as to obtain a cellulose substrate used for follow-up enzymolysis fermentation. According to the method, a scientific overall process is provided, the pretreated sample obtains excellent application effects on the aspect of ethyl alcohol preparation through enzyme hydrolysis, and certain technical guidance is provided for the engineering application of converting the corn straws into the biological ethyl alcohol.

Description

Technical field [0001] The invention belongs to the technical field of ethanol production from cellulosic raw materials, and particularly relates to a pretreatment method for ethanol production from corn stalks. Background technique [0002] Biomass is an important renewable resource. The production of fuel ethanol from it meets the requirements of environmental protection and sustainable development. It is the most likely new energy source to replace petroleum. It has huge development prospects and is also one of the current research hotspots. my country's biomass raw materials are very rich, with an annual output of about 1.145 billion tons, of which straw reaches more than 700 million tons, and corn stalks account for 35%. If they are converted into gas or liquid fuel, it will effectively alleviate the resource crisis and energy faced by mankind. A series of problems such as shortage and environmental pollution. However, lignocellulose such as corn stover is composed of cellul...

Claims

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Application Information

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IPC IPC(8): C12P19/14C12P7/10
CPCY02E50/10
Inventor 李军佘晓琼徐峻莫立焕
Owner SOUTH CHINA UNIV OF TECH
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