WO2012021950A1 - Processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lingnocelulósicos - Google Patents
Processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lingnocelulósicos Download PDFInfo
- Publication number
- WO2012021950A1 WO2012021950A1 PCT/BR2010/000334 BR2010000334W WO2012021950A1 WO 2012021950 A1 WO2012021950 A1 WO 2012021950A1 BR 2010000334 W BR2010000334 W BR 2010000334W WO 2012021950 A1 WO2012021950 A1 WO 2012021950A1
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- Prior art keywords
- sugars
- high concentration
- lignocellulosic
- obtaining
- materials
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K1/00—Glucose; Glucose-containing syrups
- C13K1/02—Glucose; Glucose-containing syrups obtained by saccharification of cellulosic materials
Definitions
- the present invention relates to a process for the enzymatic conversion of cellulose and hemicellulose contained in agroindustrial and agroforestry materials, in natura or pretreated, in order to obtain products of interest to the biofuel and petrochemical sectors. More particularly, the invention is concerned with obtaining streams with a high concentration of fermentable sugars obtained by enzymatic processes for the purpose of producing alcohols, organic acids and other molecules of interest to the industry.
- Agroforestry and agroindustrial residues are being used on a large scale as an alternative to obtain biofuels, since there is plenty of raw material available.
- pollution from fossil fuels is avoided while contributing to the preservation of the environment by producing clean energy.
- the raw material used in the process consists basically of long chain carbohydrates, which can be transformed into smaller molecules (monosaccharides), which in turn undergo different conversion processes to products of interest to the most varied types of industries.
- Lignocellulose is basically made up of cellulose, hemicellulose and lignin.
- Native cellulose comprises a highly crystalline polymer formed of glucose units linked together by beta--4 covalent bonds which can be broken down by hydrolysis, releasing glucose.
- Already hemicellulose comprises a branched heteropolysaccharide, so that the coordinated action of various enzymes is necessary to release carbohydrates to be fermented.
- Enzymatic hydrolysis of polysaccharides comprises one of the most viable ways of converting lignocellulosic materials into fermentable sugars such as glucose and xylose, which are the basis for obtaining alcohols such as ethanol, butanol, xylitol, as well as organic acids. which are products of interest to the biofuel and petrochemical sectors, preferably. The conversion is catalyzed by cellulase-like enzymes, hemicellulases, or a combination of both.
- US 7,354,743 teaches a method of obtaining ethanol (and other substances) from lignocellulosic materials using effective amounts of cellulolytic enzymes selected from the group consisting of cellulase, endogluconase, cellobiohydrolase and beta-glucosidase in the presence of of of an ethoxylated secondary alcohol that acts as a surfactant to increase the ability of these enzymes to degrade lignocellulosic material.
- cellulolytic enzymes selected from the group consisting of cellulase, endogluconase, cellobiohydrolase and beta-glucosidase in the presence of of an ethoxylated secondary alcohol that acts as a surfactant to increase the ability of these enzymes to degrade lignocellulosic material.
- PI 0803782-5 "Modular vector for expression of enzymes in filamentous fungi and method for producing a protein of interest within said fungus" - describes a process for bioproduction of ethanol from lignocellulosic and starchy residues from agroindustry, whereby a modular vector is applied in the cloning and introduction of genes into filamentous fungi to increase the expression of enzymes and other proteins in said fungi, for example hydrolases.
- the invention is based on the production of cellulosic enzymes by fermentation using the fungus Penicillium funiculosum ATCC 11797, allowing the use of synthetic substrates, or the lignocellulosic and agroforestry residues themselves, in natura or pretreated.
- the fungus is placed in contact with the cellulosic substrate in a culture medium adapted for a period of four to seven days, so that the enzymes are produced.
- the microorganism releases into the culture medium high concentrations of proteins with catalytic properties, ie cellulosic and hemicellulosic enzymes such as xylanases, endoglucanases, exoglucanases and ⁇ -glucosidases, in order to break down the cellulosic and hemicellulosic fractions. present in the substrate.
- catalytic properties ie cellulosic and hemicellulosic enzymes such as xylanases, endoglucanases, exoglucanases and ⁇ -glucosidases
- US patent application US 2010/041100 A1 describes the use of a family of cellulase-like enzymes obtained from genetically modified Trichoderma reesei. These enzymes can be used in a wide variety of industrial processes that require enzymatic hydrolysis of lignocellulosic fillers in the presence of lignin for the production of fermentable sugars, sugar alcohols and combustible alcohols.
- US Patent Application 2010/124771 A1 discloses a saccharification method whereby a lignin-containing cellulosic filler is contacted with at least one metal carbonate (Na 2 CO 3 ) in the presence of water under reaction conditions.
- a lignin-containing cellulosic filler is contacted with at least one metal carbonate (Na 2 CO 3 ) in the presence of water under reaction conditions.
- such initial sludge sludge sludge and later this sludge is contacted with a nucleophilic base (NaOH) under reaction conditions which produce a second delignification sludge comprising a lignin-containing liquid fraction and a polysaccharide enriched solid fraction ; after separation of fractions, the polysaccharide-enriched solid fraction is contacted with an enzyme pool to undergo a saccharification process and produce xylose and glucose monomers, in the proportion of about 50% of each product.
- Na 2 CO 3 metal carbonate
- US patent application US 2010/159536 A1 describes a method for degrading or converting a cellulosic material into fermentable products, whereby the cellulosic material is hydrolyzed in the presence of one or more cellulolytic enzymes, a cellobiose dehydrogenase and a polypeptide, in which an increase in cellulolytic activity occurs.
- Cellulolytic enzymes are selected from the group consisting of endogluconase, cellobiohydrolase, beta-glucosidase, esterase, protease, hemicellulase, lacase and peroxidase, xylanase, among others.
- the present invention is an enzymatic bioprocess for the production of hydrolyzates with high concentrations of fermentable sugars from lignocellulosic composition materials such as fresh and pre-treated agricultural and forest waste.
- the sugar-rich streams produced can then be fermented to produce alcohols (ethanol, butanol, xylitol), organic acids and other molecules of interest to the biofuel and petrochemical sectors.
- Solid lignocellulosic materials are added in large quantities and kept in contact with enzyme preparations under favorable pH and temperature conditions, under constant agitation, even at the beginning of the process, when the raw material is not yet completely liquefied. Throughout the process solid lignocellulosic materials, enzyme preparations and additives may be added intermittently.
- Enzymatic hydrolysis of polysaccharides comprises one of the most viable ways of converting lignocellulosic materials into fermentable sugars such as glucose and xylose, which are the basis for obtaining alcohols such as ethanol, butanol, xylitol, and organic acids.
- fermentable sugars such as glucose and xylose
- alcohols such as ethanol, butanol, xylitol, and organic acids.
- the liquefaction enzymes that act on the solubilization of the material act on the new added material
- the saccharification enzymes act on already liquefied material.
- the enzymes cellobiohydrolases and glucanohydrolases may also act on the material during its liquefaction.
- the process of the present invention achieves significant and surprising results through the use of enzymatic preparations obtained from the combination of commercial and / or home made products, which exhibit outstanding beta-glucosidase activity, so that The conversion of polysaccharides into sugars is more complete, preferably releasing fermentable monosaccharides such as glucose and xylose over intermediate sugars such as cellobiose and xylobiose (non-fermentable).
- the enzymatic process is catalyzed by cellulases and / or hemicellulases, releasing mainly glucose and xylose.
- contents of 12% to 20% by weight of solid lignocellulosic materials are kept in contact with concentrations of 5 FPU to 30 FPU (filter paper unit) / g of enzymatic preparations under favorable pH - na conditions. range 3.5 to 6.5 - preferably in the range 4.0 to 5.5, and temperature - in the range 30 ° C to 60 ° C - preferably in the range 35 ° C to 55 ° C.
- the filter paper unit (FPU) expresses the power to catalyze hydrolysis reactions on filter paper.
- the contact time of the cellulosic material with the enzyme preparation may range from 8 hours to 150 hours, depending on the initial conditions of the cellulosic material, which may be fresh or pretreated.
- the system is kept in constant agitation from the outset to provide close contact of the enzyme preparations with the lignocellulosic material.
- the process of the present invention utilizes high contents of solid lignocellulosic materials maintained in contact with enzymatic preparations under constant agitation under favorable pH and temperature conditions for 8 hours to 150 hours.
- different processing routes were tried.
- the present invention relates to a batch bioprocess which can also be intermittently fed throughout the process in at least one of three ways: lignocellulosic material, enzyme preparations and additives (surfactants and glycols).
- Table 3 below provides a non-limiting illustrative example of glucose and xylose concentrations obtained by co-saccharification of lignocellulosic material from pretreated sugarcane bagasse, as described in Brazilian patent applications PI 0505299- 8 and PI 0605017-4, according to the different feeding strategies. Glucose and xylose concentrations were measured after 72 hours and 144 hours of processing.
- the described strategies allowed the obtaining of currents rich in sugars, so that, when conducting fermentation processes, either performed sequentially or simultaneously to the hydrolysis step, the concentrations of products of interest are higher, thus reducing the costs of separation and purification of the obtained products.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- General Health & Medical Sciences (AREA)
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- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2010/000334 WO2012021950A1 (pt) | 2010-08-18 | 2010-08-18 | Processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lingnocelulósicos |
BR112013006178A BR112013006178A2 (pt) | 2010-08-18 | 2010-10-18 | processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lignocelulósicos |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2010/000334 WO2012021950A1 (pt) | 2010-08-18 | 2010-08-18 | Processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lingnocelulósicos |
Publications (2)
Publication Number | Publication Date |
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WO2012021950A1 true WO2012021950A1 (pt) | 2012-02-23 |
WO2012021950A8 WO2012021950A8 (pt) | 2012-08-23 |
Family
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Application Number | Title | Priority Date | Filing Date |
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PCT/BR2010/000334 WO2012021950A1 (pt) | 2010-08-18 | 2010-08-18 | Processo de obtenção de correntes com elevada concentração de açúcares fermentescíveis a partir de materiais lingnocelulósicos |
Country Status (2)
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BR (1) | BR112013006178A2 (pt) |
WO (1) | WO2012021950A1 (pt) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9637762B2 (en) | 2012-03-30 | 2017-05-02 | Ctc—Centro De Tecnologia Canavieira S.A. | System and method for the integrated production of first and second generation ethanol and the use of integration points for such production |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0505299A (pt) * | 2005-11-11 | 2007-08-07 | Petroleo Brasileiro Sa | processo de produção de etanol a partir do hidrolisado da fração hemicelulósica do bagaço de cana-de-açúcar em reator do tipo prensa |
US20080032344A1 (en) * | 2006-08-07 | 2008-02-07 | John Allan Fallavollita | Process for recovery of holocellulose and near-native lignin from biomass |
US7449313B2 (en) * | 2007-11-03 | 2008-11-11 | Rush Stephen L | Systems and processes for cellulosic ethanol production |
US7514247B2 (en) * | 2007-11-03 | 2009-04-07 | Wise Landfill Recycling Mining, Inc. | Systems and processes for cellulosic ethanol production |
US20090098616A1 (en) * | 2007-10-09 | 2009-04-16 | Murray Burke | Enzymatic treatment of lignocellulosic materials |
-
2010
- 2010-08-18 WO PCT/BR2010/000334 patent/WO2012021950A1/pt active Application Filing
- 2010-10-18 BR BR112013006178A patent/BR112013006178A2/pt not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0505299A (pt) * | 2005-11-11 | 2007-08-07 | Petroleo Brasileiro Sa | processo de produção de etanol a partir do hidrolisado da fração hemicelulósica do bagaço de cana-de-açúcar em reator do tipo prensa |
US20080032344A1 (en) * | 2006-08-07 | 2008-02-07 | John Allan Fallavollita | Process for recovery of holocellulose and near-native lignin from biomass |
US20090098616A1 (en) * | 2007-10-09 | 2009-04-16 | Murray Burke | Enzymatic treatment of lignocellulosic materials |
US7449313B2 (en) * | 2007-11-03 | 2008-11-11 | Rush Stephen L | Systems and processes for cellulosic ethanol production |
US7514247B2 (en) * | 2007-11-03 | 2009-04-07 | Wise Landfill Recycling Mining, Inc. | Systems and processes for cellulosic ethanol production |
Non-Patent Citations (2)
Title |
---|
OHGREN, K. ET AL.: "Effect of hemicellulose and lignin removal on enzymatic hydrolysis of steam pretreated corn stover", BIORESOURCE TECHNOLOGY, vol. 95, no. 13, September 2007 (2007-09-01), pages 2503 - 2510 * |
SUN, Y. ET AL.: "J. Hydrolysis of lignocellulosic materials for ethanol production : a review", BIORESOURCE TECHNOLOGY, vol. 83, May 2002 (2002-05-01), pages 1 - 11 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9637762B2 (en) | 2012-03-30 | 2017-05-02 | Ctc—Centro De Tecnologia Canavieira S.A. | System and method for the integrated production of first and second generation ethanol and the use of integration points for such production |
Also Published As
Publication number | Publication date |
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WO2012021950A8 (pt) | 2012-08-23 |
BR112013006178A2 (pt) | 2016-06-07 |
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