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Method for producing ethanol by using lychee dregs as raw material

A lychee and ethanol technology, which is applied in the field of ethanol production using lychee residue as raw material, can solve the problems of high energy consumption, unreported industrial production, and high production costs, and achieve the effects of reducing pollution and emissions, being easy to control, and saving energy

Inactive Publication Date: 2012-07-04
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main problems in the production of fuel ethanol: one is high production cost, and the other is high energy consumption
However, at present, there are only small-scale successful cases of producing fuel ethanol from lychee residue as raw material, and successful industrial production has not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Keep the fresh lychee residue dry for 4 hours at a constant temperature of 90°C, crush it and pass through a 30-mesh sieve, add 4 times the weight of the obtained lychee residue powder to immerse in water, adjust the pH value to 4.4 with dilute hydrochloric acid, press the litchi residue powder Based on powder weight, add cellulase 45U / g and β-glucosidase 17CBU / g, enzymatically hydrolyze at 47°C for 4h, filter, add 0.1% urea based on filtrate weight, and then sterilize at 115°C for 13min According to the volume of the filtrate, add 5% Saccharomyces cerevisiae seed liquid, seal and ferment for 72 hours in an environment of 33°C and 80% humidity, and then collect by distillation to obtain ethanol. The Saccharomyces cerevisiae seed solution is prepared as follows: inoculate the yeast strains preserved on a slope at 4°C into the yeast activation medium, cultivate them in a constant temperature shaker at 32°C and 100 rpm for 24 hours, and inoculate them with 10% inoculum In ...

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PUM

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Abstract

The invention discloses a method for producing ethanol by using lychee dregs as raw materials. The method comprises the following steps of: a, drying and crushing fresh lychee dregs, and screening with a 30-mesh screen; b, immersing the obtained lychee dreg powder with water of which the weight is 3-6 times that of the lychee dreg powder; adjusting the pH value to 4.0-4.8; based on the weight of the lychee dreg powder, adding 30-60U / g of cellulase and 15-20CBU / g of beta-glucosidase; performing enzymolysis at 45-50 DEG C for 3-5 hours; and filtering; c, based on the weight of the filtrate, adding 0.08-0.12% of urea, and sterilizing at 110-120 DEG C for 10-15 minutes; and d, based on the volume of the filtrate, adding 4.5-5.5% of saccharomyces cerevisiae seed liquid; performing sealed fermentation for 70-75 hours in an environment with temperature of 30-36 DEG C and humidity of 75-85%; and distilling and collecting to obtain the ethanol. Through the method, the carbohydrates in the lychee dregs can be sufficiently used, and the yield of the ethanol can reach about 8.1kg of ethanol per 100kg of lychee dregs; the pollution and discharge are reduced through comprehensive utilization of the lychee dregs; the energy consumption is reduced; and the method has a wide prospect.

Description

technical field [0001] The invention relates to a method for producing ethanol, in particular to a method for producing ethanol with lychee residue as raw material. Background technique [0002] Energy, environment and "three rural" issues are the three major issues that have plagued my country's economic and social development for a long time. Currently, oil, as the main energy source, plays an important role in the world, and even dominates the economic lifeline of a country or restricts the development of a country's economy. However, oil is a non-renewable resource. With the continuous exploitation and consumption of human beings, this kind of energy is becoming less and less, and it is gradually on the verge of exhaustion, and the burning of a large amount of gasoline has caused great pollution to the environment. In recent years, more and more countries have begun to devote themselves to the research and development of renewable energy (biomass) to replace gasoline in o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12P19/14C12R1/865
CPCY02E50/16Y02E50/10
Inventor 邱松山周如金李春海姜翠翠海金萍
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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