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Method for removing tannin in fuel alcohol production by acorn fermentation

A fuel alcohol and acorn technology, applied in the energy field, can solve the problems of wasting water resources, poor removal effect, time-consuming and labor-intensive, etc., and achieve the effect of high alcohol conversion rate

Inactive Publication Date: 2014-02-12
QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not only time-consuming and labor-intensive, but also a waste of water resources, and more importantly, the removal effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Acorn kernels are washed, mixed with water for pulping, and the ratio of material to water is 1:30; after the mixed slurry is put into an ultrasonic treatment box, the ultrasonic frequency is 30kHz, the power is 300W, and the temperature of the material liquid is 20°C, ultrasonic treatment time is 30min. By measuring the tannin content and alcohol content and calculating the alcohol conversion rate, it can be seen that the tannin content before extraction is 5.78%, the tannin content after extraction is 1.31%, and the alcohol conversion rate is 73.26%.

Embodiment 2

[0013] Embodiment 2: Acorn kernels are washed, mixed with water for pulping, and the ratio of material to water is 1:25; after the mixed slurry is put into an ultrasonic treatment box, the ultrasonic frequency is 40kHz, the power is 500W, and the temperature of the material liquid is 30°C, ultrasonic treatment time is 40min. By measuring the tannin content and alcohol content and calculating the alcohol conversion rate, it can be seen that the tannin content before extraction is 5.78%, the tannin content after extraction is 0.81%, and the alcohol conversion rate is 81.33%.

Embodiment 3

[0014] Embodiment 3: Acorn kernels are washed, mixed with water and refined, and the ratio of material to water is 1:30; the mixed slurry is put into an ultrasonic treatment box, the ultrasonic frequency is 50kHz, the power is 500W, and the temperature of the material liquid is 35°C, ultrasonic treatment time is 350min. By measuring the tannin content and alcohol content and calculating the alcohol conversion rate, it can be seen that the tannin content before extraction is 5.78%, the tannin content after extraction is 0.97%, and the alcohol conversion rate is 79.43%.

[0015] Conventional hot water extraction method for tannin, its tannin removal rate is generally 50-60%, and its alcohol conversion rate is generally 60-70%. It can be seen from the examples that, compared with the hot water extraction method, the ultrasonic extraction method has a higher removal rate of tannin, so that the alcohol conversion rate is also higher.

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Abstract

The invention relates to a method for removing tannin in fuel alcohol production by acorn fermentation, which comprises the following steps: A. pretreatment, that is, cleaning acorn kernels, mixing with water, pulping with a kernel-water ratio of 1:20-1:40; B. ultrasonic extraction, that is, putting the mixed pulp into an ultrasonic treatment box, performing ultrasonic treatment under the condition that the ultrasonic frequency is 20-60 kHz, the power is 300-600 W, the liquid temperature is 20-40 DEG C, and the ultrasonic treatment time is 30-60 min; C. determining tannin by spectrophotometry. The method of the invention also determines alcoholic strength, and calculates the alcohol conversion rate. The beneficial effects of the present invention are that: the invention adopts the tannin removing technology which greatly influences fuel alcohol production by acorn starch raw material fermentation; most tannin is removed by using the ultrasonic extraction method, and thus high alcohol conversion rate is realized.

Description

technical field [0001] The invention relates to the field of energy, in particular to a method for removing tannins when fermenting acorns to produce fuel alcohol. Background technique [0002] Fuel alcohol, as a renewable clean energy, can replace increasingly rare and non-renewable petrochemical products, and has broad market prospects. However, the huge cost of traditionally producing ethanol from grain limits the popularization and use of fuel ethanol, and the production of ethanol from corn and other grains will inevitably lead to a rise in grain prices. Therefore, seeking cheap and easy-to-obtain ethanol biomass raw materials has become a research hotspot at home and abroad. [0003] Acorn is a general term for the kernels of Fagaceae (Fagaceae) plants except a large number of cultivated chestnuts. my country's acorn resources are very rich, according to statistics, the area of ​​acorn forest is 1.33×10 7 -1.6×10 7 hm 2 , the annual output of acorns is estimated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/10
Inventor 刘晓娜田英勇
Owner QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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