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Production of ethanol from agronomic crop fibre castoff

A waste and crop technology, applied in the field of biological manufacturing, can solve the problems of high cost and large amount of ethanol

Inactive Publication Date: 2008-08-13
徐佳珊 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the amount of cellulase used so far is too large, resulting in high cost of ethanol production from crop fiber waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The inventor's implementation and steps are exemplified as follows:

[0017] 1) Select suitable crop fiber wastes, such as corn stalks and wheat stalks, crush them to a suitable size with a straw grinder, measure the main components of the fibers, and clean them with waste dilute acid (alkali) to remove harmful substances such as pesticides.

[0018] 2) add concentrated acid (alkali) to mix under normal temperature, the concentration of acid (alkali) is determined according to the kind of acid (alkali), the concentration of concentrated sulfuric acid and concentrated phosphoric acid is 60%~70%, the concentration of concentrated hydrochloric acid is 35%~45%. The concentration of volatile organic acid is 30% to 60%, and the lime can be directly mixed in solid phase. Drain part of the concentrated acid (alkali) solution for later use.

[0019] 3) Add water to the above mixture, reuse part of the waste dilute acid (alkali), adjust the concentration to 0.05-0.1%, and the te...

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Abstract

The invention belongs to a method for preparing ethyl hydrate by improved agronomic crop fabric wastes which is more economy for preparing ethyl hydrate by integrated utilization. The improved method comprises acid and caustic pretreating the agronomic crop wastes, color removing and concentrating crystal the xylose, enzyme treatmenting the ligno-cellulose, alcohol(ic) fermentation and rectification the hydrolytic decomposition sugar. The chemical pretreatment process comprises using 0.1-10alcaine, vitriol oil, phosphoric acid, volatility organic acid and mixture of the above acid, and 1-5Óalcarea lime, ammonia spirit and mixture of the above alkali in order to carry out in moment. The temperature of acid pretreatment is from normal temperature to 120 DEG C, and time is 1-8 hours. The pretreatment final liquor is used for color removing, concentrating and crystallization. The pretreatment final slag is hydrolyzed by cellulase and cellase at the temperature of 40 to 60 DEG C for 12-14 hours. The fermentation time of prehydrolysis or prehydrolysis while fermentation are 48 hours or so.

Description

technical field [0001] The invention belongs to the field of biomanufacturing, and relates to a method for producing ethanol from crop fiber waste. Background technique [0002] Crop fiber waste is an extremely rich renewable resource, generally containing 40% to 50% of cellulose, 25% to 35% of hemicellulose, 15% to 20% of lignin, and a small amount of soluble sugar, Proteins, fats, and other inorganic mineral components have been attracting attention for utilizing such resources as industrial raw materials. [0003] With the gradual depletion of the earth's oil resources and the increase of the greenhouse effect of the atmosphere, the use of ethanol to replace part of oil for transportation fuel has attracted worldwide attention. Crop fiber waste mainly includes various agricultural residues such as straw, shells, leather stools and undeveloped herbaceous plants such as thatch and asparagus, etc. These substances are mainly composed of cellulose, hemicellulose and lignin. ...

Claims

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Application Information

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IPC IPC(8): C12P7/10
CPCY02E50/10
Inventor 徐佳珊徐光明徐云峰
Owner 徐佳珊
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