WO2022023686A1 - Procede de production d'un sirop de sucres a partir d'une biomasse lignocellulosique residuaire - Google Patents
Procede de production d'un sirop de sucres a partir d'une biomasse lignocellulosique residuaire Download PDFInfo
- Publication number
- WO2022023686A1 WO2022023686A1 PCT/FR2021/051432 FR2021051432W WO2022023686A1 WO 2022023686 A1 WO2022023686 A1 WO 2022023686A1 FR 2021051432 W FR2021051432 W FR 2021051432W WO 2022023686 A1 WO2022023686 A1 WO 2022023686A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- syrup
- sugar syrup
- lignocellulosic biomass
- glucose
- fermentable sugars
- Prior art date
Links
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
- C12P7/10—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate substrate containing cellulosic material
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/02—Monosaccharides
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
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- C12R2001/00—Microorganisms ; Processes using microorganisms
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- Y02E50/10—Biofuels, e.g. bio-diesel
Definitions
- TITLE METHOD FOR PRODUCTION OF A SUGAR SYRUP FROM RESIDUAL LIGNOCELLULOSIC BIOMASS
- the invention relates to the field of the production of fermentable sugars and relates to the use of waste lignocellulosic resources, for example of the paper/cardboard type, as a substrate for a process for preparing said sugars.
- the invention describes in particular the process used for the preparation of the raw material and its treatment allowing the production of a sugar syrup, in particular of a purified glucose syrup which can be used as a raw material, in particular in the biofuels industry or biotechnologies.
- the invention relates to a method for producing a sugar syrup comprising fermentable sugars, in particular a syrup comprising glucose, from lignocellulosic biomass comprising paper waste, in particular printable paper, printed paper , graph paper, wrapping paper or cardboard.
- the invention also relates to a sugar syrup comprising fermentable sugars, in particular a syrup comprising glucose, which can be obtained by said process.
- the use of the process for producing biosourced molecules or biofuels, preferably ethanol, as well as a process for producing biofuels, in particular ethanol, are also objects of the present invention.
- the lignocellulosic biomass mainly used as a source of fermentable sugars today on a pilot and industrial scale is the so-called 2G (second generation) biomass, i.e. a plant-type biomass, such as the residues of forestry and agricultural industry (wheat straw, corn cobs and sugarcane bagasse) (Nizami et al., 2017).
- 2G second generation biomass
- thermochemical and/or mechanical means By thermochemical and/or mechanical means.
- Non-biological processes include: concentrated acid processes, gasification, hydropyrolysis and pyrolysis.
- the first step consists in pretreating the biomass, in order to increase the digestibility of the cellulose and the release of monomeric sugars (mainly glucose).
- monomeric sugars mainly glucose
- Processes using biological hydrolysis can be classified into 4 sub-categories, depending on whether or not they include the basic steps of the process (Parisutham et al., 2014):
- CBP Consolidated Bioprocessing
- the advantage of implementing a combined process such as SSF, SSCF or CBP is to be able to reduce the number of steps and reactors by bringing together the enzyme(s) capable of depolymerizing the cellulose and the (s) microorganism(s) capable of converting simple sugars into a molecule of interest. This generally makes it possible to reduce the necessary investment and therefore the production cost of the target molecule.
- the process is developed and optimized specifically for a molecule and a given market. This type of process usually involves genetically modified microorganisms.
- patent application CN 106520861 implements enzymatic hydrolysis with dilute acid pretreatment.
- Patent application CN102382909 uses acid hydrolysis with successive use of dilute acid and concentrated acid.
- the patent application JP2006088136 implements a fine pulverization of the biomass by mechanical pretreatment, without acid cooking.
- Patent application US2010/0009422 describes a process for preparing ethanol comprising in particular a step of thermal pretreatment with high temperature steam.
- the object of the invention is to hydrolyze the cellulose and, where appropriate, the hemicellulose contained in the residual lignocellulosic biomass without having recourse to cumbersome pre-treatment and purification processes, thus making it possible to reduce impurities, operational costs linked to the use of chemical catalysts, to simplify the subsequent so-called “downstream processing” stages (eg stages of clarification, purification and concentration), while obtaining an optimum mass yield.
- the object of the invention is in particular to develop a method for producing a sugar syrup comprising fermentable sugars, in particular a syrup comprising glucose, from lignocellulosic biomass comprising paper waste, in particular printable paper waste. , printed paper or cardboard.
- Another object of the invention is to enhance said sugar syrup by producing biosourced molecules or biofuels, preferably ethanol.
- Another object of the invention is to obtain a platform molecule with high added value (sugars or other) from paper-cardboard waste, and in particular useful for the production of biofuels and chemical molecules with low environmental impact and low cost.
- the invention relates to a method for producing a sugar syrup comprising fermentable sugars from lignocellulosic biomass comprising paper waste, said method comprising in particular the following steps: a. optionally a step of grinding said lignocellulosic biomass; b. i. an impregnation step and ii. a step of thermal pretreatment of the lignocellulosic biomass, said steps of impregnation and thermal pretreatment being carried out simultaneously or successively according to i. then ii. ; vs. an enzymatic hydrolysis step of the pretreated product; and D. a step for recovering the sugar syrup comprising fermentable sugars.
- the invention relates to a sugar syrup comprising fermentable sugars, in particular a syrup comprising glucose, which can be obtained by the process according to the invention.
- the invention relates to the use of the process or the syrup according to the invention to produce biosourced molecules or biofuels, preferably ethanol.
- the invention relates to a method for producing biofuels, in particular ethanol.
- the invention relates to a method for producing a sugar syrup comprising fermentable sugars, in particular a syrup comprising glucose, from lignocellulosic biomass comprising paper waste, in particular printable paper, printed paper or cardboard.
- said method comprising the following steps: a. optionally, a step of grinding said lignocellulosic biomass comprising paper waste; bi a step of impregnating said lignocellulosic biomass comprising paper waste or crushed lignocellulosic biomass obtained at the end of step a. in an aqueous medium, preferably in water and at room temperature, and ii.
- a heat pretreatment step implemented in the absence of addition of acid, at a temperature between 80°C and 150°C, preferably between 90°C and 130°C, more preferably at 100° C. or 120° C., at a pH of between 6.5 and 8.5, in particular between 6.5 and 8, in particular at a pH of between 6.8 and 7.5, preferably at a neutral pH, in order to obtain a pretreated product, said impregnation and heat pretreatment steps being carried out simultaneously or successively according to i. then ii.; vs. a step of enzymatic hydrolysis of the pretreated product obtained at the end of step b.
- step c in order to convert cellulose and hemicellulose into a sugar syrup comprising fermentable sugars, in particular into a syrup comprising glucose; and D. a step for recovering the sugar syrup comprising fermentable sugars, in particular the syrup comprising glucose, obtained at the end of step c.
- the invention relates to a process for producing a syrup comprising glucose from lignocellulosic biomass comprising paper waste, in particular printable paper, printed paper or cardboard comprising the following steps: a. optionally, a step of grinding said lignocellulosic biomass comprising paper waste; b. i. a step of impregnating said lignocellulosic biomass comprising paper waste or crushed lignocellulosic biomass obtained at the end of step a. in an aqueous medium, preferably in water and at room temperature, and ii. a heat pretreatment step implemented in the absence of acid addition, at a temperature between 80° C.
- steps of impregnation and thermal pretreatment being carried out simultaneously or successively according to i. then ii. ; vs. a step of enzymatic hydrolysis of the pretreated product obtained at the end of step b. to convert cellulose and hemicellulose into a syrup comprising glucose; and D. a step for recovering the syrup comprising the glucose obtained at the end of step c.
- sucrose syrup refers to a viscous and thick liquid comprising sugars in solution.
- sugar syrup can be interchanged with the term “sweetened juice”.
- the sugar syrup comprising glucose also comprises xylose, in a lower proportion with respect to glucose.
- the sugar syrup comprises 70 to 85% glucose and 10 to 15% xylose.
- the term “fermentable sugars” refers to simple sugars or their mixtures, for example glucose, fructose, arabinose, mannose, galactose, xylose. These “simple sugars” are likely to be fermented under the action of yeasts or bacteria to produce alcohol. These are in particular monosaccharides (/.e. sugars comprising 5 or 6 carbon atoms), in particular a hexose, such as glucose.
- the “fermentable sugars” refer to fermentable monomeric sugars, ie comprising a single unit. Even more preferably, the "fermentable sugars" comprise or consist essentially of glucose and in a lesser proportion of xylose.
- the term “lignocellulosic biomass” refers to a substrate essentially consisting of cellulose (from 30 to 70%), hemicellulose (from 5 to 35%) and lignin (from 5 to 25% ) determined with respect to the dry mass of the lignocellulosic biomass.
- the lignocellulosic biomass is a substrate essentially consisting of cellulose (from 30 to 70%), hemicellulose (from 5 to 25%) and lignin (from 5 to 25%).
- the lignocellulosic biomass is a substrate essentially consisting of cellulose (from 30 to 70%), hemicellulose (from 5 to 20%) and lignin (from 5 to 20%).
- the lignocellulosic biomass is a substrate essentially consisting of cellulose (from 30 to 70%), hemicellulose up to 18% and lignin up to 19%.
- Cellulose is a polymer of glucose, i.e. hexose
- hemicellulose is a polysaccharide consisting essentially of pentoses (e.g. xylose and arabinose) and glucose
- lignin is a macromolecule rich in phenolic units.
- Cellulose is the main source of fermentable sugars.
- the "lignocellulosic biomass" used in the invention comprises paper waste.
- the papermaking waste may have been recycled several times, for example up to 7 times, and the average size of the fibers contained in this papermaking waste is generally between 0 mm and 2 mm, preferably between 0.1 mm and 1.5 mm .
- the substrate providing the lignocellulosic biomass consists of paper waste.
- the substrate providing the lignocellulosic biomass comprises paper waste and a co-substrate.
- the substrate providing the lignocellulosic biomass comprises paper waste and is contained in or constituted by a more complex waste such as the Fermentable Fraction of Household Waste (FFOM).
- FFOM Fermentable Fraction of Household Waste
- the level of cellulose in the FFOM is less than 50%, for example from 10 to 40% by weight.
- the SWOT and more generally the household waste in which it is contained are of variable composition depending on the regions considered in the world.
- the SWOTs can be implemented within the framework of the invention to provide the lignocellulosic biomass to be treated insofar as their content of cellulose, hemicellulose and lignin, in particular by the contribution permitted by the papermaking waste, provides a substrate whose composition falls within the proportions defined above.
- a SWOT capable of being treated in accordance with the invention comprises 10% to 20% by weight of paper and/or from 8% to 15% by weight of corrugated and flat cardboard and/or between 3 and 6% by weight of textiles and/or between 15 and 25% by weight of sanitary textiles (considered as dissociated from other textiles), for example around 13%, 10%, 4.6% and 21% by weight respectively, these proportions being determined as a percentage of the dry mass of SWOT considered.
- the remaining fraction of the SWOT is made up of food waste (from 60% to 80%), if necessary also associated with garden waste, or other types of fibers such as wood residues.
- the waste constituting the FFOM can be used as a lignocellulosic substrate for carrying out the methods of the invention.
- household waste can also contain composites, plastics, unclassified fuels, glass, metals, unclassified incombustibles and a minority part of hazardous waste. These non-fermentable wastes are normally discarded in the mechanobiological sorting process allowing the production of the SWOT.
- the SWOT can therefore be defined by considering how it is obtained: it is the result of the mixed collection of household waste, followed by a mechanical-biological separation stage to retain only the fine organic fraction of this waste.
- the substrate providing the lignocellulosic biomass comprises paper mill waste and SWOT as co-substrate.
- the lignocellulosic biomass may alternatively or also comprise residues of plant type.
- plant-type lignocellulosic biomass are residues from the forestry and agricultural industry such as wheat straw, corn cobs and sugar cane bagasse, residues from the agro-food industry.
- the proportions respectively of hemicellulose and lignin by weight of the dry matter of the total biomass in the mixture are respectively less than 19% and 18%.
- the lignocellulosic biomass comprises only little (in% by weight of the dry matter) or no plant-type waste from the forestry or agricultural industry.
- paper waste comprises or essentially consists of paper and cardboard waste.
- paper and cardboard waste corresponds to a mixture of paper and cardboard waste, said mixture possibly comprising by weight relative to the weight of the dry matter of the waste between 5 and 60% of gray cardboard, between 5% and 60%, in particular between 10 and 20% by weight of printed paper of the office paper type and between 5% and 100% of corrugated cardboard
- the paper waste is chosen from the group consisting of paper (in particular printed or printable paper), cardboard, in particular newsprint, magazines and stationery sludge.
- This waste may contain undesirable impurities such as plastics and metals, as well as constituents of inks, said impurities being present in very small quantities.
- the paper waste is a mixture of lignocellulosic waste (of the cardboard paper type) of low quality in the following average proportions by weight of the total dry matter (+/- 5%, the percentage total not exceeding 100%):
- said lignocellulosic biomass before grinding and / or impregnation ie "raw" lignocellulosic biomass consists of paper waste and has a total dry matter content of between 70% and 100%, in particular between 85% and 96% by weight of the biomass.
- said lignocellulosic biomass before grinding and / or impregnation ie "raw" lignocellulosic biomass consists of FFOM and has a total dry matter content of between 45% and 55%, for example, in particular around 50% by weight of the biomass.
- the total dry matter content varies between 50 and 96% by weight of the biomass depending on the proportions of substrate and of added co-substrate.
- the impregnation step (also called pulping) b.i. makes it possible to obtain a relatively homogeneous suspension with no dry and/or floating agglomerates. Indeed, the agglomerates are generally less well or even not hydrolyzed in step c. subsequent enzymatic hydrolysis.
- the impregnation step b.i. is carried out for a period of between 5 and 30 minutes, preferably for 15 minutes.
- the impregnation step b.i. may include agitation.
- mixing may be implemented until the disappearance of the floating blocks, in particular larger than 10 cm, disappearance which may be determined by a visual check carried out at predetermined and/or regular intervals in the reactor.
- the impregnated biomass obtained at the end of step b.i. typically has a total dry matter content of between 5% and 30%, in particular between 10% and 20%.
- said method may comprise a step a. grinding said raw lignocellulosic biomass comprising paper waste.
- the lignocellulosic biomass is supplied in the form of paper waste.
- the lignocellulosic biomass is supplied in the form of Fermentable Fraction of Household Waste (FFOM).
- FFOM Fermentable Fraction of Household Waste
- said method does not include a step of grinding said lignocellulosic biomass comprising paper waste. This allows a better tolerance with respect to the quality of the incoming biomass, plastic or metallic impurities not affecting the efficiency or the smooth running of the process.
- the lignocellulosic biomass undergoes a thermal pretreatment in order to increase its reactivity to enzymatic hydrolysis and the accessibility of cellulose to enzymes.
- a chemical agent of the acid or base type is usually added to the lignocellulosic biomass to improve (catalyze) the release of the cellulose.
- a chemical catalyst generates significant nuisances in terms of purification, strongly impacting the economic viability of the sector.
- the thermal pretreatment step b.ii. is implemented in the absence of addition of acid, preferably in the absence of chemical catalyst. This makes it possible to avoid the generation of inhibitory molecules (in particular for the fermentation step), to reduce the operational costs linked to the use of these chemical catalysts as well as the complexity of the "downstream processing" solutions, while obtaining a yield optimum mass.
- the thermal pretreatment step b.ii. is carried out at a pressure of between 1 and 5 bars, preferably between 1.5 and 3 bars, more preferably at a pressure equal to approximately 2 bars.
- the heat pretreatment step b.ii. is carried out for a period of between 10 minutes and 120 minutes, preferably between 10 minutes and 60 minutes, more preferably for 30 minutes.
- Said steps of impregnation bi and of thermal pretreatment b.ii can be carried out simultaneously or successively, in particular depending on the compactness of the lignocellulosic biomass.
- steps of impregnation bi and heat pretreatment b.ii. are carried out simultaneously, these two steps can be implemented for a total duration of between 10 minutes and 120 minutes, preferably between 10 minutes and 60 minutes, more preferably for 30 minutes.
- the impregnation step b.i. and the heat pretreatment step b.ii. are carried out simultaneously, e.g. within the same reactor, in particular in the presence of very loose lignocellulosic biomasses such as uncompacted paper.
- the impregnation step b.i. and the heat pretreatment step b.ii. are carried out successively, e.g. in two different reactors.
- the impregnation step b.i. is therefore followed by a thermal pretreatment step b.ii.
- the homogenization of the biomass is then better controlled in the impregnation step. This has the advantage of making the biomass more homogeneous and more accessible for the effect of the enzymes, while ensuring the inactivation of the microorganisms (in particular bacteria) present initially.
- the pretreated product obtained at the end of step b. may also be referred to by the term “dough” or “slurry”. This means, for example, that pieces of paper or cardboard are no longer visible to the naked eye.
- step b. may be followed by a freezing and/or thawing and/or pasteurization step in order to limit the risks of contamination in the subsequent enzymatic hydrolysis step, which could lead to yield reductions.
- the enzymatic hydrolysis step c. is carried out by means of an enzymatic cocktail such as a mixture of cellulolytic and/or hemicellulolytic enzymes, in particular a mixture of cellulases and hemicellulases.
- an enzymatic cocktail such as a mixture of cellulolytic and/or hemicellulolytic enzymes, in particular a mixture of cellulases and hemicellulases.
- the cellulases can be chosen from the group consisting of endocellulases, exocellulases, b-glucosidases and mixtures thereof.
- the hemicellulases can be chosen from the group consisting of xylanases, xylosidases, endoglucanases, endoxylanases, endoxylanases and b-xylosidases, as well as certain arabinofuranosidases and esterases, and mixtures thereof.
- the mixture of cellulolytic and/or hemicellulolytic enzymes is chosen from Ctech3® (Novozymes), Deltazym® (WeissBioTech) and Isobake CX®, more preferably Ctech3®.
- the hydrolysis step c. is implemented using between 10 and 60 mg of enzymes per g of biomass, preferably between 10 and 60 mg of enzymes per g of cellulose, more preferably between 15 and 25 mg of enzymes per g of cellulose .
- the yield of the enzymatic hydrolysis is between 40% and 80%, typically between 60% and 70%.
- the Yield is calculated as the ratio of the amount of monomeric sugar released to the total molar amount initially available.
- This enzymatic hydrolysis step c hydrolyzes sugars from both cellulosic and hemicellulose fractions.
- step c. comprises a preliminary step of adjusting the pH in order to obtain an acid pH, for example a pH of approximately 5.
- the pretreated product obtained at the end of step b. optionally frozen and/or thawed and/or pasteurized, generally has a basic or neutral pH, so that the pH adjustment is generally carried out by means of adding an acid such as sulfuric acid or phosphoric acid, preferably sulfuric acid.
- the sugar syrup generated after enzymatic hydrolysis contains a lower mineral load, facilitating the purification steps and creating no fermentation inhibitor complex such as Furfural or HMF, while allowing increased yields of sugar release.
- the sugar syrup comprising fermentable sugars in particular the syrup comprising glucose, recovered at the end of step d. has at least one of the following characteristics:
- - a total dry matter content of between 5% and 25%, preferably between 5% and 20%, in particular between 10% and 20% by weight;
- - a ratio of glucose to total sugars of between 60% and 90%, preferably between 80% and 90% by weight of the dry matter.
- the dry matter content represents all the dry matter present in the product, measured for example according to the protocol described in the ISO 6731 standard.
- the free glucose content represents the quantity of glucose (in dry mass) relative to the total quantity of material (also in dry mass) present in the product, this parameter being conventionally measured in the liquid phase by HPLC or by an equivalent analytical method then estimated by calculation.
- said method further comprises the following steps: e. a step of clarifying the sugar syrup comprising fermentable sugars, in particular syrup comprising glucose, recovered at the end of step d. in order to separate the solid residues from the liquid residues, said step of clarifying preferably comprising a step of screening, sieving and/or settling and/or centrifugation; f. a purification step, preferably on activated carbon, of the sugar syrup comprising fermentable sugars, in particular the syrup comprising glucose, obtained at the end of step e. ; and g. a step for recovering the sugar syrup comprising fermentable sugars, in particular syrup comprising purified glucose obtained at the end of step f.
- the clarification step e. comprises a sieving and/or decantation and/or centrifugation step.
- the clarification step e. includes a step of sieving, settling and centrifugation.
- the purification step f. makes it possible to eliminate residual suspended matter, such as some of the ions and/or salts, and to capture certain soluble contaminants such as metallic salts and ink residues.
- the purification step f. is carried out by filtration on activated carbon.
- activated carbon usable in step f. are Colorsorb 620 powder (Jacobi), BGX granular (Chemviron), CPW powder (Chemviron), CXV (old coal).
- said method further comprising: h. a step of concentrating, preferably by means of a vacuum evaporator, more preferably by means of a forced recirculation or falling film thin film evaporator, the sugar syrup comprising fermentable sugars, in particular the syrup comprising glucose, purified obtained at the end of step f. or g. ; and i. a step for recovering the sugar syrup comprising fermentable sugars, in particular syrup comprising glucose, purified and concentrated obtained at the end of step h.
- the concentration step makes it possible in particular to ensure the stability of the product by reducing the risk of development of contamination (bacterial in particular).
- the sugar syrup comprising fermentable sugars in particular the syrup comprising glucose, recovered at the end of step g. or i., has at least one of the following characteristics:
- - a free glucose content of between 60% and 75%, typically between 65% and 70% by weight of the dry matter; - a ratio of glucose to total sugars of between 70% and 90%, typically between 75% and 85%, in particular 80% by weight of the dry matter.
- the method for producing a syrup comprising glucose from lignocellulosic biomass comprising paper waste comprises the following steps: a. optionally, a step of grinding said lignocellulosic biomass comprising paper waste; b. i. a step of impregnating said lignocellulosic biomass comprising paper waste or crushed lignocellulosic biomass obtained at the end of step a. in an aqueous medium, preferably in water and at room temperature, and ii.
- a heat pretreatment step carried out in the absence of acid addition, at a temperature between 80°C and 150°C, preferably between 90°C and 130°C, more preferably at 100°C C or 120° C., at a pH of between 6.5 and 8.5, in particular between 6.5 and 8, in particular at a pH of between 6.8 and 7.5, preferably at a neutral pH, in order to obtain a pretreated product, said steps of impregnation and thermal pretreatment being carried out simultaneously or successively according to i. then ii.; vs. a step of enzymatic hydrolysis of the pretreated product obtained at the end of step b. to convert cellulose and hemicellulose into a syrup comprising glucose; d.
- a step for recovering the syrup comprising glucose obtained at the end of step c e. a syrup clarification step comprising glucose recovered at the end of step d. in order to separate the solid residues from the liquid residues, said clarification step preferably comprising a step of screening, sieving and/or decantation and/or centrifugation; f. a step of purification on activated carbon of the syrup comprising glucose obtained at the end of step e. ; g. a step for recovering the syrup comprising purified glucose obtained at the end of step f; h.
- a concentration step preferably by means of a vacuum evaporator, more preferably by means of a forced recirculation or falling film thin film evaporator, of the syrup comprising purified glucose obtained at the end of the step g. ; and i. a step for recovering the syrup comprising glucose, purified and concentrated obtained at the end of step h.
- the invention also relates to a sugar syrup comprising fermentable sugars, in particular syrup comprising glucose, which can be obtained by the process according to the invention, characterized in that the said syrup has:
- HMF hydroxymethylfurfural
- Said syrup may comprise constituents other than glucose, said constituents being present in proportions of between 10% and 30% by weight of the dry matter.
- constituents are sugars such as xylose, galactose, arabinose, mannose, traces of solvent, traces of ash.
- the invention also relates to the use of the method according to the invention, or of the syrup according to the invention to produce biosourced molecules.
- biosourced molecules are: sugars (monosaccharides), ethanol, isobutene, 1,3-propanediol, 2,3-butanediol, 3-hydroxypropionic acid, acetic acid, butyric acid, capric acid, citric acid, fumaric acid, malic acid, propionic acid, pyruvic acid, succinic acid, levulinic acid, 2,5-furandicarboxylic acid, sorbitol, and xylitol.
- lactic acid Xu et al., 2014, Yadav et al., 2020
- lactic acid acetic acid Kondo et al., 1996)
- butyric acid Flu et al., 2017
- propionic acid Wang et al., 2013
- succinic acid Ong et al., 2019
- l isopropanol Frerreira dos Santos Vieira et al., 2020
- isobutene US20180057843, US9249430, WO2014086781
- butanol Choeng et al., 2019; Birgen et al., 2019
- farnesane W02007139924, W0200886781)045555) .
- biosourced molecules according to the invention are preferably chosen from the group consisting of lactic acid, acetic acid, butyric acid, proprionic acid, succinic acid, isopropanol and isobutene, even more preferably from the group consisting of lactic acid, acetic acid, butyric acid, proprionic acid and isopropanol.
- the invention also relates to the use of the process according to the invention, or of the syrup according to the invention to produce biofuels, preferably ethanol.
- the invention also relates to a method for producing biofuels, in particular ethanol, comprising the steps of the method according to the invention and a subsequent fermentation step in order to convert the sugar syrup comprising fermentable sugars, in particular the syrup comprising glucose, recovered at the end of step g. Yes. into biofuels, especially ethanol.
- the fermentation step is carried out using yeasts and/or bacteria.
- the yeasts can be chosen from the group consisting of yeasts of the genus Saccharomyces, Yarrowia and Leuconostoc.
- the bacteria can be chosen from the group consisting of bacteria of the genus Bacillus, Lactobacillus, Acetobacter, Escherichia, Clostridium and Zymomonas.
- the fermentation step is carried out using yeasts of the genus Saccharomyces, preferably Saccharomyces cerevisiae.
- the bacteria can be chosen from Clostridium acetobutylicum or Escherichia coli.
- the yeasts or the bacteria are chosen for their ability to carry out the alcoholic fermentation.
- the fermentation step according to the invention can be carried out using yeasts and/or bacteria capable of fermenting both hexoses and pentoses.
- This fermentation step converts the sugars from both cellulosic and hemicellulosic fractions into biofuels, in particular ethanol.
- This fermentation step can take place before the subsequent so-called “downstream Processing” steps, that is to say in particular before the clarification steps e., purification steps f. or concentration h.
- the fermentation step is carried out in a separate reactor from that of the enzymatic hydrolysis step (SHF process) or simultaneously in the same reactor (SSF, SSCF, CBP processes) , preferably in a separate reactor from that of the enzymatic hydrolysis step (SHF process).
- the method may comprise, after the fermentation step, a step for purifying the biosourced molecule or the biofuel, for example by distillation, in particular in the case of ethanol, the distillation step being whether or not preceded by a clarification step.
- Example 1 Sugar syrup obtained at the end of the thermal pretreatment and enzymatic hydrolysis stages.
- the sugar syrup obtained at the end of the enzymatic hydrolysis step c. of the process according to the invention has the following characteristics:
- Table 1 below indicates the composition of this sugar juice.
- Example 2 Sugar syrup obtained at the end of the solid/liquid separation (clarification), purification and concentration stages.
- the sugar syrup obtained at the end of step i. of the process according to the invention has the following characteristics:
- Example 9 Comparative fermentation of a sugar syrup according to the invention with a control syrup comprising the same quantity of glucose and xylose from conventional channels
- a sugar syrup generated from paper and cardboard could be tested on a yeast strain of Saccharomyces cerevisiae capable of producing ethanol marketed by the company Lesaffre for the production of ethanol (strain Cellux 4).
- the fermentation tests took place in an Erlenmeyer or a Schott bottle at two given sugar concentrations: 140 and 210 g/kg of medium (corresponding to the cumulative quantities of glucose and xylose) named respectively TAV 8 and TAV 12.
- a sugar syrup control (called 1G) containing the same quantity of glucose and xylose was manufactured and tested under the same conditions.
- the objective of the comparison of the result of the fermentation was to highlight the quality and the absence of inhibitory effect of the sugar syrup resulting from the invention during the fermentation, compared to the use of a syrup glucose and xylose from conventional channels, i.e. produced from 1 G resource (/.e. 1st generation) consisting in particular of beet, wheat, sugar cane.
- Ethanol production was monitored using mass loss related to CO2 production , directly correlated to ethanol production. The actual final concentration was also checked at the end of the experiment by HPLiC.
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Jellies, Jams, And Syrups (AREA)
- Saccharide Compounds (AREA)
Abstract
Description
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JP2023506077A JP2023535512A (ja) | 2020-07-31 | 2021-07-30 | 残存リグノセルロース系バイオマスから糖シロップを製造する方法 |
US18/018,713 US20230323407A1 (en) | 2020-07-31 | 2021-07-30 | Method For Producing A Sugar Syrup From A Residual Lignocellulosic Biomass |
CN202180057984.5A CN116568816A (zh) | 2020-07-31 | 2021-07-30 | 由残余木质纤维素生物质产生糖浆的方法 |
EP21773127.2A EP4189102A1 (fr) | 2020-07-31 | 2021-07-30 | Procede de production d'un sirop de sucres a partir d'une biomasse lignocellulosique residuaire |
CA3190282A CA3190282A1 (fr) | 2020-07-31 | 2021-07-30 | Procede de production d'un sirop de sucres a partir d'une biomasse lignocellulosique residuaire |
AU2021316845A AU2021316845A1 (en) | 2020-07-31 | 2021-07-30 | Method for producing a sugar syrup from a residual lignocellulosic biomass |
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- 2021-07-30 CA CA3190282A patent/CA3190282A1/fr active Pending
- 2021-07-30 AU AU2021316845A patent/AU2021316845A1/en active Pending
- 2021-07-30 JP JP2023506077A patent/JP2023535512A/ja active Pending
- 2021-07-30 CN CN202180057984.5A patent/CN116568816A/zh active Pending
- 2021-07-30 EP EP21773127.2A patent/EP4189102A1/fr active Pending
- 2021-07-30 US US18/018,713 patent/US20230323407A1/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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FR3142492A1 (fr) | 2022-11-28 | 2024-05-31 | IFP Energies Nouvelles | Procédé de traitement d’un mélange en phase aqueuse de composés comprenant des sucres à 5 et 6 atomes de carbone. |
WO2024115096A1 (fr) | 2022-11-28 | 2024-06-06 | IFP Energies Nouvelles | Procede de traitement d'un melange en phase aqueuse de composes comprenant des sucres a 5 et 6 atomes de carbone |
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CN116568816A (zh) | 2023-08-08 |
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