Method for producing ethanol from crop straw

A crop straw and ethanol technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of increased production costs, large heat energy, increased costs, etc., and achieve the effect of reducing production and production costs

Active Publication Date: 2008-05-28
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: one, due to the reaction at high temperature, hemicellulose will be converted into five-carbon sugars such as furfural, if it is not separated, then materials such as furfural will inhibit the ethanol fermentation in the later stage, and increase the content

Method used

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  • Method for producing ethanol from crop straw
  • Method for producing ethanol from crop straw

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1. Treatment of corn stover

[0044] Take 100 kilograms of corn stalks, manually defoliate and remove the roots, use a straw feed kneading machine (Wanqing 9STC-400 machine) and a SFSP56×36 chip grinder (Jiangsu Muyang Group) to process, and the bottom discharge screen aperture is Ф5' Obtain straw powdery material.

Example Embodiment

[0045] Example 2. Dilute lye cooking pretreatment

[0046] Take the reactor to be 0.8m 3 , Cylindrical reactor with rotation speed of 1r / min, electric heating. Open the flange cover at one end of the cylindrical reactor, add 100 kg of crushed straw lumps, and then add 600 kg of 1.8% NaOH aqueous solution, cover the flange cover, and tighten it. In the case of rotation, heat to 120°C for 1 hour, then cool, open the flange cover, and pour out all the materials.

Example Embodiment

[0047] Example 3. Solid-liquid separation

[0048] Move the above-mentioned alkali-cooked materials to DJG350 screw squeezer. Start the machine to collect liquid from the bottom and solids from the discharge end. After all the materials enter the squeezing dryer for the first time, add the collected solids and add hot water according to the solid amount 1:1 until all the materials enter the squeezing dryer.

[0049] Or use a separator (SS450 three-foot upper unloading centrifuge, rotating speed 3000r / min, maximum loading capacity 30kg), separate 30kg of materials each time, centrifuge for 10min under the condition of 3000r / min to discharge the liquid, A solid substance containing 65% to 75% water is obtained. Take out the solids, put them in 5-6 times the weight of the solids, adjust the slurry, and add them to the centrifuge for separation. Repeat twice continuously to reduce the alkali content in the straw, and the pH of the water for the second washing is 9.0. The second wash i...

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PUM

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Abstract

The invention provides a process for producing ethanol with raw materials of straws. The process comprises preliminary treatment to crops straws, solid-liquid separation, hydrolyzed solid components and fermentation with yeasts after hyperfiltration and filtration enrichment by RO combination. The invention can simultaneously conduct evaporating concentration to liquid components, and produce corresponding by-product of lignosulfonate by adding sulfonating agent. The ethanol producing process of the invention greatly decreases the cost of industrial production which ferments straws to produce ethanol, and efficiently utilizes all the ingredients of crops straws.

Description

technical field [0001] The present invention relates to a method for producing ethanol. More specifically, the invention relates to a method for producing ethanol by fermenting crop stalks. Background technique [0002] Since the energy crisis in the 1970s, people have begun to look for new renewable fuels to replace non-renewable energy sources such as petroleum and coal, and lignocellulose is the largest renewable resource on earth, so it is used as cheap sugar The production of fuel ethanol from natural sources should be the most effective way to solve the world energy crisis. [0003] The United States, Brazil and other countries have already successfully blended fuel ethanol into gasoline and sold it in large quantities in the market. And the United States is already researching and developing ethanol diesel. Therefore, ethanol is becoming a renewable energy source that people pay more and more attention to. The key to using ethanol as an alternative energy source fo...

Claims

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Application Information

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IPC IPC(8): C12P39/00C12P7/10C12R1/72C12R1/85
CPCY02E50/16Y02E50/10
Inventor 李荣杰薛培俭宋加林邓远德郑辉穆晓玲杨为华
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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