Method for producing alcohol from sugar sorghum

A fuel ethanol and sweet sorghum technology, applied in biofuels, fermentation, etc., can solve the problems of sweet sorghum slag treatment and utilization, large area of ​​sweet sorghum stalks, waste of resources, etc., to improve raw materials Utilization efficiency, overcoming the limitation of solid content, and the effect of preventing the deterioration of raw materials

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of fungicides and / or preservatives can inhibit the subsequent fermentation and is not good for the environment; open-air frozen storage has a large loss of sugar, is easily affected by weather changes, and is prone to mildew, and the area occupied by fresh sweet sorghum stalks The area is large; the operability of the instant fermentation and storage of the fermented mash is poor; the concentration increases the osmotic pressure of the sugar solution, and the energy consumption is high, and the subsequent fermentation needs to be diluted to cause a waste of energy, and the treatment and utilization of sweet sorghum dregs are not well resolved, which leads to a waste of resources , which brings about environmental problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Extracting juice from sweet sorghum fresh stalks

[0030] Get 500kg of freshly harvested sweet sorghum fresh stalks with leaves and ears removed, squeeze with a commercially available small-sized press, and the squeezing pressure is 40MPa to obtain 365kg of sweet sorghum juice and 135kg of sweet sorghum slag. After measuring, the sucrose concentration in the sweet sorghum juice is 11.5wt%, the glucose concentration is 3.05wt%, and the fructose concentration is 2.55wt%; the water content in the sweet sorghum residue is 50wt%, the cellulose content is 35.6wt%, and the hemicellulose content is 24.3wt%.

Embodiment 2

[0031] Example 2 Preparation of sweet sorghum molasses

[0032] Get 300kg of sweet sorghum juice obtained by squeezing the juice in Example 1, and concentrate it with a rotary evaporator to finally obtain 100kg of sweet sorghum molasses, with a total sugar concentration of 51.3wt%, a sucrose concentration of 34.5wt%, and a glucose concentration of 9.15wt%. , the fructose concentration is 7.65wt%.

Embodiment 3

[0033] Example 3 Preservation of Sweet Sorghum Residue by Pickling

[0034] Get the sweet sorghum dregs 100kg that pressing obtains among the embodiment 1, be divided into 10 parts, every part 10kg. Take another 15L glass container, add 10L 5wt% dilute sulfuric acid, take 1 part of 10kg sweet sorghum slag, put it in a glass container filled with 10L dilute sulfuric acid, soak for 1 hour, take out the sweet sorghum slag, squeeze dry to the water content and soak The same as before, then put in the second 10kg sweet sorghum slag, add 250g of concentrated sulfuric acid at the same time, soak for 1 hour, squeeze dry to the same level as before soaking; then put in the third 10kg sweet sorghum slag, and carry out the same operation for the second part, until all soaked. This operation can achieve two purposes: (1) add enough acid according to the water content in the sweet sorghum residue before soaking sweet sorghum residue each time to make the acid concentration in the acid sol...

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PUM

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Abstract

The invention discloses a method for producing alcohol from sugar sorghum. The method comprises the following steps: (1) squeezing fresh sugar grass stalks to realize separation of juice and slag; (2) concentrating the sugar sorghum juice to prepare molasses; (3) soaking the sugar sorghum residue with dilute acid solution, fishing out and drying; (4) conducting dilute acid pretreatment or dilute acid steam explosion pretreatment on the sugar sorghum residue obtained in the step (3); (5) adding alkali into the sugar sorghum residue after pretreatment for neutralization, adding cellulase for enzymatic hydrolysis with an enzymatic hydrolysis system with solid content of 5-35 wt%, so as to obtain sugar sorghum residue enzymatic hydrolysate after enzymolysis; (6) adding molasses into the sugar sorghum residue enzymatic hydrolysate according to a proportion of 0-30 wt% and fermenting to produce fuel ethanol; and (7) separating the ethanol from fermentation to obtain an ethanol fuel product. The method can realize long-term preservation of the sugar sorghum residue, effective utilization of juice and residue and ensure the annual production of fuel ethanol, and has the advantages of efficiency, energy saving and environmental protection.

Description

technical field [0001] The invention relates to a method for preparing fuel ethanol from sweet sorghum, in particular to a method for preparing fuel ethanol by utilizing cellulose hydrolysis sugar and sugar juice in sweet sorghum stalks. Background technique [0002] Fuel ethanol is a new type of clean fuel and an important direction for the development and utilization of renewable energy. Fuel ethanol can be produced by bio-fermentation from grain crops such as corn and wheat and non-food crops such as sugar cane, cassava, sweet potato, sorghum, and sugar beet, or by pretreatment of plant fibers, hydrolysis with inorganic acid or cellulase, and then through Produced by biological fermentation. A certain proportion of fuel ethanol is blended into ordinary gasoline to form ethanol gasoline. The ethanol content of ethanol gasoline for vehicles in China and the United States is 10 v%, and the ethanol content of ethanol gasoline for vehicles in Brazil reaches an average of 22 v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10
CPCY02E50/10
Inventor 张全李风华关浩唐开宇黎元生佟明友金平乔凯
Owner CHINA PETROLEUM & CHEM CORP
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