Method for producing ethyl alcohol by using sorgo stalk

A technology of sweet sorghum and stalks, which is applied in the field of ethanol production by using sweet sorghum stalks, which can solve the problems of low utilization rate of raw materials, air and environmental pollution, waste, etc., and achieve energy saving, high utilization rate and high ethanol yield Effect

Inactive Publication Date: 2010-08-11
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the production of fuel ethanol from sweet sorghum stalks is mainly carried out by fermenting the sap of sweet sorghum stalks or grains plus juice, such as the patent application "Method for Producing Ethanol from Sweet Sorghum Stalk Juice" (Application No.: 200510076833.7), "Using Sweet sorghum stalk production ethanol liquid fermentation technology" (application number: 200410035604.6), "sweet sorghum stalk production ethanol process method" (application number: 02151719.3), "a kind of fuel ethanol and its production process" (application number No.: 2007100022972.4), "Technology for Producing Ethanol Using Sweet Sorghum Stalk or Sweet Sorghum Dry Straw as Raw Material" (Application No.: 200610134397.9), etc., mainly utilize sweet sorghum stalk juice to produce ethanol, "Use Sweet Sorghum Straw and its The method for producing ethanol from grains" (application number: 200710057584.6), "method for producing ethanol with sweet sorghum stalks" (application number: 200710010720.6), etc. utilize sweet sorghum stalk juice and grains to produce ethanol, and these inventions use the stalk Juice fermentation only utilizes part of the soluble sugar in the sweet sorghum stalk, and discards or burns the structural sugar in the form of cellulose and hemicellulose that is almost equal to the soluble sugar in the sweet sorghum dregs, which not only causes a lot of waste, The utilization rate of raw materials is low, and it causes air and environmental pollution

Method used

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  • Method for producing ethyl alcohol by using sorgo stalk

Examples

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Embodiment 1

[0030] The production of ethanol using sweet sorghum stalks comprises the following steps:

[0031] (1) Extracting juice from sweet sorghum stalks: 100 kilograms of sweet sorghum stalks with a water content of 72.8%, a sugar content of 13.9%, and a crude fiber content of 9.6% are crushed and cut into filamentary segments of 10 mm to 25 mm, and squeezed with a press machine. Then adding water to the obtained sweet sorghum dregs for secondary pressing to obtain sweet sorghum juice and silky sweet sorghum dregs with extremely low residual sugar content;

[0032] (2) Cooking sweet sorghum stalk juice at 100° C. for 30 minutes, centrifuging and filtering, removing sediment to obtain clarified sweet sorghum juice.

[0033](3) Dilute acid blasting pretreatment of sweet sorghum slag Naturally air-dried sweet sorghum slag, washed with 0.1% H 2 SO 4 Soak in the solution for 12 hours, put into the closing device of the steam explosion tank; keep it under the pressure of 1.5MPa for 6 mi...

Embodiment 2

[0039] The production of ethanol using sweet sorghum stalks comprises the following steps:

[0040] (1) Juicing of sweet sorghum stalks with 72.8% water content, 13.9% sugar content, and 100Kg of sweet sorghum stalks with a crude fiber content of 9.6% are pulverized and cut into filamentous segments of 10mm to 25mm, squeezed with a press, and then Adding water to the obtained sweet sorghum dregs and performing secondary pressing to obtain sweet sorghum juice and silky sweet sorghum dregs with very low residual sugar content.

[0041] (2) Cooking the sweet sorghum stalk juice obtained in step (1) at 100° C. for 30 minutes, centrifuging and filtering, and removing sediment to obtain clarified sweet sorghum juice.

[0042] (3) Sweet sorghum slag dilute acid blasting pretreatment Air-dry the sweet sorghum slag obtained in step (1), wash with 0.5% H 2 SO 4 Soak in the solution for 8 hours, put it into the steam explosion tank, and close the device; quickly increase the pressure, ...

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Abstract

The invention discloses an ethanol production method by utilizing sweet sorghum stalks, which pertains to the field of plant fuel. The invention includes the following steps that: the juice and the residue of the sweet sorghum stalks are separated, then the sweet sorghum residue is treated with diluted acid explosion pretreatment, fermentable sugar is obtained by the enzymolysis of a cellulase , then the sweet sorghum juice and the sorghum residue are processed to obtain the fermented sugar liquid, concentration and regulation of the fermented sugar liquid are carried out, and finally the ethanol is prepared by using the brewing yeast for fermentation. The method of the invention can make full use of the sweet sorghum stalks and has the advantages of short fermentation time, high enzymolysis efficiency of the cellulose, high ethanol yield, etc.

Description

technical field [0001] The invention belongs to a biofuel production method, in particular to a method for producing ethanol by using sweet sorghum stalks. Background technique [0002] Excessive exploitation and use of oil, natural gas, and coal have caused the world to face serious energy and environmental crises. Finding alternative, sustainable, environmentally friendly green energy has become the focus of the world's energy strategy. Biofuel ethanol is a feasible alternative. At present, China mainly produces fuel ethanol with aged grains as raw materials. , CO of grain ethanol 2 The amount of release has not been reduced, and the purpose of environmental protection cannot be achieved. At the same time, the use of grain to produce fuel ethanol not only costs high, but also causes waste of grain. Therefore, it is necessary to find new plant raw materials for the production of biofuels. Sweet sorghum stalks are rich in sugar and fiber, and are an ideal raw material for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06C12R1/865
CPCY02E50/17Y02E50/10
Inventor 孙君社康利平刘萍刘莉张京生
Owner CHINA AGRI UNIV
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