Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing ethanol from grain

A technology for grains and raw materials, applied in the field of bioethanol production, can solve the problems of long fermentation time, high energy consumption, starch gelatinization, etc., and achieve the effects of reducing steam and water consumption and increasing utilization rate

Active Publication Date: 2021-11-02
PETROCHINA CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a method for producing ethanol with grains as raw material, so as to solve the problem of high energy consumption, long fermentation time and starch paste produced by the increase of viscosity in the prior art when fermenting raw materials with high substrate concentration. problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The grain raw materials are removed from impurities, and after the removal of impurities, the raw materials are crushed with a pulverizer to a size below 20 mesh. After crushing, process water or clear liquid reuse water is used for slurry adjustment, and the concentration of starch slurry is controlled at 30%. Transport the prepared starch slurry to the liquefaction tank, add cellulase, mannanase, pectinase, acid-resistant liquefaction enzyme, and carry out the first liquefaction. The dosage of the above-mentioned enzymes is respectively: the dosage of cellulase is 2.5u / g raw material, 7u / g raw material for mannanase, 10u / g raw material for pectinase, 6u / g raw material for acid-resistant liquefaction enzyme, the temperature is 55°C and the time is 40min in the first stage of liquefaction. After the first stage of liquefaction, the second stage of liquefaction was carried out at 85°C for 60 minutes. During the second stage of liquefaction, only acid-resistant liquefacti...

Embodiment 2

[0046] The preparation process is the same as in Example 1, except that in the first stage of the liquefaction process, the dosage of cellulase is 3.0u / g raw material, the dosage of mannanase is 10u / g raw material, and the dosage of pectinase is 10u / g raw material , acid-resistant liquefaction enzyme is 8.0u / g raw material. The ethanol concentration can reach 142g / L after the fermentation time is 50h.

Embodiment 3

[0048] The preparation process is the same as that in Example 1, except that in the second stage of the liquefaction process, the dosage of the acid-resistant liquefaction enzyme is 12u / g raw material. The ethanol concentration can reach 135g / L after the fermentation time is 50h.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for producing ethanol from grains. The method comprises the following steps: crushing the grains to make starch slurry; liquefying the starch slurry through a liquefaction process to obtain liquefied mash, and the enzymes added in the liquefaction process include the first cellulase, mannanase, pectinase and Acid-resistant liquefaction enzyme; ferment the liquefied mash to obtain ethanol. The method realizes the fermentation of high-concentration ethanol of the grain raw material, can reduce the consumption of steam and water, and increase the utilization rate of equipment.

Description

technical field [0001] The invention relates to the technical field of bioethanol production, in particular to a method for producing ethanol using grains as raw materials. Background technique [0002] Since humans entered the industrial society, resource and environmental issues have become increasingly prominent, especially the extensive use of non-renewable fossil energy, resulting in a series of resource and environmental issues, among which the greenhouse effect caused by a large amount of carbon dioxide emissions has become an unavoidable major issue. question. Renewable and environment-friendly energy and resources are the direction of future transformation and upgrading. [0003] Adding fuel ethanol to gasoline can effectively reduce nitrogen oxides in automobile exhaust. Ethanol has a higher octane number, and the octane number can be increased by mixing fuel ethanol in gasoline. Fuel ethanol replaces methyl tert-butyl ether (MTBE) as an antiknock agent for motor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06
CPCC12P7/06Y02E50/10
Inventor 岳军屈海峰马丹惠继星宁艳春徐友海胡世洋王继艳金刚
Owner PETROCHINA CO LTD