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Method of production of ethanol from two different starting materials

A technology for ethanol and lignocellulose, which can be used in biofuels, fermentation, etc., and can solve the problems of loss of DDGS by-product value and reduction of ethanol production.

Active Publication Date: 2011-01-19
SEKAB E TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] "Options 4-7 have the disadvantage of losing DDGS by-product value
Schemes 5a and b have the disadvantage of reduced ethanol production
A comparison of schemes 4 and 7 shows that there is no benefit in combining the individual fermentations, probably because of the linear scaling of the tanks

Method used

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  • Method of production of ethanol from two different starting materials
  • Method of production of ethanol from two different starting materials
  • Method of production of ethanol from two different starting materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0288] The following experiments were carried out in the laboratory to simulate the industrial process according to the invention. Also a control experiment (no sample) was performed.

[0289] The raw material consists of the grain wheat. Wheat straw is obtained from one place and wheat starch as flour is obtained in a food store, the product ( Sweden).

[0290] The wheat straw is decomposed (chopped) by a hammer mill. The material was screened and fragments 2-10 mm in length were retained. Store straw chips at room temperature until time of processing.

[0291] The straw pieces were soaked in a 0.2% by weight sulfuric acid solution (20 grams of fluid per gram of straw). After standing in the acid solution for 1 hour at room temperature, the straw chips were pressed to a dry content of 40% by weight. A group of 600 g of straw with the stated dry content was treated with water steam at a temperature of 190° C. and a corresponding water vapor pressure. The steam treatm...

Embodiment 2

[0312] Table 3 shows the concentrations of some components obtained from bagasse-derived products after different types of steam pretreatment. The table shows that the inhibitors furfural, acetic acid and HMF are released during steaming and thus form part of the bagasse-derived process products.

[0313] Table 3. Properties of bagasse-derived products obtained after steam pretreatment

[0314]

[0315] (1) 180°C / 10min. (2) 190°C / 5min. HOAc = acetic acid.

[0316] (Using the severity factor Log(Ro) simplifies the comparison of the results of different pretreatment experiments. The temperature and residence time are combined to form an expression:

[0317] Log ( Ro ) = Log ( t · exp ( ( T - T ref ...

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Abstract

The present invention provides a method of improving the ethanol yield in production of an ethanol-containing product from a lignocellulosic biomass and a sugar product containing fermentable sugars derived from a sugar-rich material. The method comprises treatment, involving hydrolysis, of said lignocellulosic biomass in one or more steps to obtain lignocellulose-derived treatment products including fermentable sugars; and fermentation, using a fermenting agent, of a mixture comprising at least part of said lignocellulose- derived treatment products and said fermentable sugars derived from said sugar-rich material to obtain the ethanol-containing product, wherein an amount of said sugar product is mixed with an amount of at least one of the following: (i) lignocellulose-derived material in the treatment; (ii) lignocellulose-derived treatment products from the treatment; and (iii) lignocellulose-derived treatment products in the fermentation, such that said fermentable sugars derived from said sugar-rich material and said at least part of said lignocellulose-derived treatment products are present in the mixture, and said amounts are controlled such that the fermenting agent is subjected to stress by lignocellulose-derived treatment products to the extent that the ethanol yield is improved. Further, a corresponding method using a starch-rich starting material is provided as well as a corresponding use, composition and system.

Description

technical field [0001] The present invention relates to the production of ethanol using at least two starting materials, one starting material containing lignocellulosic material and the other rich in fermentable sugars, starch or another that can be easily converted into fermentable sugars Material. Thus, the production of ethanol may be based entirely on biomass, for example on different crops as a whole. For example, in the case of corn plants, fermentable sugars are available from corn cobs and corn stovers. Other examples are different types of grains and straw respectively, and in the case of sugarcane, expressed juice (containing fermentable sugars) and bagasse respectively. Crops other than those listed above may also be used as raw material. Of course, the starting material can also consist of mixtures of the abovementioned plants and any other suitable crops or parts of crops. Background technique [0002] A literature study entitled "Feasibility Study for Co-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12P19/00
CPCY02E50/17Y02E50/16C12P7/06C12P19/00Y02E50/10C12P7/10
Inventor 凯琳·奥格伦格里德加德吉多·扎齐
Owner SEKAB E TECH