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Method for preparation of fuel ethanol from orange peel residue as raw material left by pectin and hesperidin extraction

A technology of fuel ethanol and hesperidin, applied in biofuels, fermentation, etc., can solve the problems of inconvenient large-scale production, high requirements for production equipment, and increased production costs, so as to save energy consumption, reduce production costs, and increase productivity Effect

Inactive Publication Date: 2014-11-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: ①Using NaOH solution to pretreat raw materials at 121°C not only consumes a lot of energy but also requires high production equipment, which increases production costs; ②Two enzymes are used in the enzymatic hydrolysis process, namely Cellulase and hemicellulase, and the amount of enzyme is high, not only will increase the production cost but also is not conducive to the later treatment; ③ need to carry out detoxification treatment, the untreated clean activated carbon used in the detoxification process will produce certain impact; ④ fermentation of yeast strains used in the fermentation process will increase the difficulty of operation in the fermentation process, which is not convenient for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for producing fuel ethanol using the remaining orange peel residue after extracting pectin and hesperidin as raw material, the specific steps of the method are as follows:

[0022] (1) Enzymolysis reaction

[0023] According to the ratio of 1:30:30 in the ratio of 1:30:30 according to the ratio of orange peel residue dry basis mass (g): the quality (mg) of cellulase: the volume (mL) of citric acid-sodium citrate buffer solution, orange peel residue and The buffer solution is added to the batch reactor in turn; then, after adjusting the pH value of the solution in the batch reactor to 5.0 with high-concentration hydrochloric acid or sodium hydroxide solution, add cellulase, and keep it at a constant temperature of 50°C and a speed of 150r / min , after performing the enzymatic hydrolysis reaction for 60 h, the enzymatic hydrolysis mixture was obtained. The mixture after enzymolysis is placed in a filter press for solid-liquid separation, and the solid residue (i....

Embodiment 2

[0028] A method for producing fuel ethanol as a raw material using the remaining orange peel residue after extracting pectin and hesperidin, same as in Example 1, wherein:

[0029] In the (1) step, the ratio of the dry basis mass of orange peel residue (g): the mass (mg) of cellulase: the volume (mL) of citric acid-sodium citrate buffer solution is 1: 10: 20, and the interval is adjusted When the pH value of the solution in the reactor reaches 4.5, cellulase is added, and the enzymolysis reaction is carried out at a constant temperature of 45° C. and a rotational speed of 100 r / min for 48 hours.

[0030] In the (2) step, after adjusting the pH value of the reducing sugar solution obtained in the step (1) to 4.0, the volume (L) of the reducing sugar solution after adjusting the pH value: the quality (g) of peptone: yeast extract powder The quality (g) of: the quality (g) of ammonium sulfate: the quality (g) of magnesium sulfate heptahydrate: the ratio of the quality (g) of pota...

Embodiment 3

[0033] A method for producing fuel ethanol using the remaining orange peel residue after extracting pectin and hesperidin as raw material, same as Example 1, same as Example 1, wherein:

[0034] In the (1) step, the ratio of orange peel residue dry basis mass (g): the mass (mg) of cellulase: the volume (mL) of citric acid-sodium citrate buffer solution is 1: 50: 40, adjust intermittent When the pH value of the solution in the reactor reaches 5.5, cellulase is added, and the enzymolysis reaction is carried out at a constant temperature of 55° C. and a rotational speed of 100 r / min for 72 hours.

[0035]In the (2) step, after adjusting the pH value of the reducing sugar solution obtained in the step (1) to 4.0, according to the volume (L) of the reducing sugar solution after adjusting the pH value: the quality (g) of peptone: yeast extract The mass (g) of powder: the mass (g) of ammonium sulfate: the mass (g) of magnesium sulfate heptahydrate: the mass (g) ratio of potassium dih...

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Abstract

The invention discloses a method for preparation of fuel ethanol from orange peel residue as a raw material left by pectin and hesperidin extraction. According to the method, the orange peel residue left by pectin and hesperidin extraction is used as the raw material for producing an ethanol product by a simple process of enzyme hydrolysis reaction, sugar liquid fermentation and distillation separation. The method has the advantages of full enzymatic hydrolysis, high ethanol yield, simple production equipment, low operation cost, no pollutant, environmental protection and cleanness, easy promotion of industrial production, and the like, and has great significance to the implementation of comprehensive continuous orange peel utilization and maximization of citrus industry economic value. The method can be widely applied to the production of ethanol; the prepared product can be widely used in energy and power fuels and chemical production.

Description

1. Technical field [0001] The invention belongs to the technical field of biomass energy, and particularly relates to a method for producing fuel ethanol by fermenting the remaining orange peel residue after extracting pectin and hesperidin as raw materials. 2. Background technology [0002] With the rapid development of the global economy, energy and environmental issues have become the focus of attention of all countries. Traditional fossil fuels are decreasing day by day, and only by developing new green energy can the sustainable development of mankind be realized. As a renewable and clean biomass energy, fuel ethanol has a broad market prospect and has become the research focus of various countries. Raw materials for the production of fuel ethanol mainly include food crops and cellulosic raw materials. However, the production cost of traditional grain ethanol production is huge, which limits the promotion and use of fuel ethanol. Moreover, this method uses grains such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10
CPCY02E50/10
Inventor 谭世语丁文彪蔡卫超周炳贤江春立卿万梅
Owner CHONGQING UNIV
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