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Method for preparing fuel ethanol from fermentable sugars in fresh straw juice
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A technology for fresh straw juice and straw juice is applied in the field of preparing fuel ethanol by using fermentable sugar in fresh straw juice, which can solve problems such as difficulty in obtaining fermentable sugar, and achieve the advantages of being favorable for popularization and application, low production cost and reduced production cost. Effect
Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0005] In order to achieve the purpose of producing fuel ethanol from non-grain raw materials, the present invention overcomes the above-mentioned problem of difficulty in obtaining fermentable sugars in the process of using cellulose in the dry basis of corn stalks as raw materials to produce ethanol, and proposes a method with higher production efficiency and is suitable for large-scale industries. Process for producing ethanol from fermentable sugars in fresh corn stalk juice
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Examples
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Embodiment 1
[0026] Example 1 Fresh straw sampling analysis of fermentable sugar concentration in the juice
[0027] On October 16, 2009, about 15 kg of fresh corn stalks were collected from Nianpan Village and Shangsi Village around Fushun City, Liaoning Province, respectively, and labeled as Sample No. 1 and Sample No. 2. After taking it back, remove the leaves, cut them into small pieces, wrap them in plastic wrap, and store them in a -20°C refrigerator for later use. The water content, glucose, fructose and sucrose content of No. 1 and No. 2 samples were analyzed respectively.
[0028] Sample No. 1
[0029] Randomly take 30 knots of frozen fresh straw, thaw and peel. The medullary part (1#-M) and skin part (1#-S) of the fresh straw were weighed respectively, and the water content and the sugar content in the water phase were measured after crushing. Glu, Fru, and Suc represent glucose, fructose, and sucrose, respectively, and the results are shown in Table 1.
[0030] Table 1 Water ...
Embodiment 2
[0036] Example 2 Preparation of Ethanol by Fermentation of Fresh Corn Stalk Juice
[0037] The method for preparing ethanol with fresh corn stalk juice has the following steps:
[0038] 1. Harvest corn stalks within 5 days after corn harvest, immediately remove ears, roots and leaves of fresh stalks to obtain net fresh corn stalks.
[0039] 2. Take 20 tons of net fresh corn stalks obtained in step 1 and squeeze the juice with a juicer to obtain 12 tons of fresh corn stalk juice and 8 tons of fresh corn stalk residue.
[0040] 3. The fresh corn stalk juice obtained in step 2 contains 12% of sucrose, 0.8% of glucose and 10% of fructose, converted into a total fermentable monosaccharide concentration of 15%. The multi-effect vacuum evaporation method is used to concentrate, so that the total amount of fermentable monosaccharide in the juice is concentrated to 24%, and 7.5 tons of concentrated sugary juice are obtained.
[0041] 4. 7.5 tons of the concentrated sugary juice obtaine...
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Abstract
The invention discloses a method for preparing fuel ethanol from fermentable sugars in a fresh straw juice. The method comprises the following steps: 1, collecting fresh straws, juicing them, and carrying out solid-liquid separation to obtain a straw juice and straw residue; 2, concentrating the straw juice until the total content of fermentable monosaccharides is 20-24%; 3, adjusting the concentrated straw juice to be in a state suitable for fermentation; and 4, adding ethanol fermentation strains, fermenting to obtain a fermentation mash, and further separating to recover ethanol. The method of the invention, which overcomes a problem that the fermentable sugars are difficult to obtain in the ethanol production process with cellulose in dry corn straws as a raw material, has the advantages of high production efficiency, suitableness of the large scale industrialization production, and the like.
Description
technical field [0001] The invention relates to a method for producing fuel ethanol, in particular to a method for producing fuel ethanol by utilizing fresh straw containing fermentable sugar. technical background [0002] With the increasing depletion of mineral fuels, high oil prices, and global warming caused by greenhouse gas emissions, governments of various countries attach great importance to the development of fuel ethanol based on the needs of sustainable development. [0003] my country attaches great importance to energy diversification and environmental pollution, and adopts incentive measures such as financial subsidies and tax reductions to vigorously promote the development of diversified technologies and industries that can replace petroleum energy. The promulgation of the "Renewable Energy Law" and the "National Medium- and Long-Term Science and Technology Development Plan" has greatly promoted the development process of bio-liquid fuels such as biodiesel an...
Claims
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