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Method for preparing ethanol from straws

A technology of straw and ethanol, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of limited and underutilized food resources, and achieve the effects of low cost, easy operation and safe production.

Inactive Publication Date: 2015-12-23
CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: aiming at the current use of grain resources in my country to prepare ethanol, but my country's grain resources are limited, and at the same time, my country's rice straw resources are abundant and not fully utilized. The invention provides a method for producing ethanol by fermenting rice straw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] specific implementation plan

[0019] Put the rice straw into a grinder and grind it into 40-50 mesh powder, put it into a container, add liquid ammonia to it at a ratio of 2:1 to the rice straw powder, keep the temperature at 85-90°C, seal it, and Pressurize the container to make it 2.2-2.6MPa, stir for 30-40min, then quickly release the pressure, make the pressure in the container 0.1MPa within 2-4min, then filter, add 0.07% mass fraction to the filtrate % sulfuric acid solution to cover the filtrate, set the temperature to 210°C, stir for 35min, filter, and collect the filtrate; put the above-mentioned filtrate into the fermentation tank, add fermentation liquid to it, submerge the filtrate 4-6cm, stir Evenly, seal and ferment for 4-6 days, keep the temperature at 32-36°C to obtain a mixed fermentation broth; put the mixed fermentation broth obtained above into a centrifuge, and perform centrifugation for 20-25 minutes to remove impurities, and the centrifuged soluti...

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Abstract

The invention relates to waste utilization, in particular to a method for preparing ethanol from straws by fermentation, aiming at the situation that the ethanol is prepared from limited grain resources in China currently, and straw resources are rich but not made full use of. Through practical examples, the method for preparing the ethanol from the straws has the advantages that since agricultural wastes, namely the straws are fully used for preparing the ethanol by fermentation, the method is low in cost, the purity of the prepared ethanol is as high as 92% and ethanol yield is larger than 0.172g / g; the method is safe in preparation and easy to operate.

Description

technical field [0001] The invention relates to waste utilization, in particular to a method for preparing ethanol from rice straw. Background technique [0002] As one of the fuels, alcohol is widely used in alcohol lamps and alcohol stoves that are often used in medical institutions. After being ignited, it is used to prepare test reagents or heat pharmaceutical preparations, and its flame can also be used to temporarily sterilize small medical devices. At present, the raw materials for alcohol production are potatoes and grains, and alcohol can be obtained through fermentation and distillation. However, my country's grain resources are limited, and mass production of alcohol will cause a shortage of grain resources. [0003] Rice straw is one of the most abundant agricultural wastes in my country, with an annual output of about 180 million tons [1], accounting for more than 1 / 5 of the country's total crop straw output. Therefore, the development of high value-added produ...

Claims

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Application Information

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IPC IPC(8): C12P7/10C12R1/69
CPCY02E50/10
Inventor 雷春生宋国
Owner CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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