Ifp Energies Nouvelles

Agro Industries Recherche Et Developpement

Institut National De Recherche Pour L'agriculture, L'alimentation Et L'environnement

Institut National De La Recherche Agronomique

Institut National De Recherche Pour L'agriculture, L'alimentation Et L'environment

Institut National De La Recherche Pour L'agriculture, L'alimentation Et L'environnement

Argo Industries Recherche Et Developpement

Institute National De Recherche Pour L'agriculturel'alimentation Et L'environnement

Agro Industrie Recherches Et Developpements

L'institut National De La Recherche Agronomique

Caroline Aymard

Marcel Ropars

Pierre-Antoine Bouillon

Sandra Menir

Larissa Perotta

Sylvain Louret

Rejane Dastillung

Remy Marchal

Eszter Toth

Romain Rousset

Stephanie Fleurier

Etienne Jourdier

Olivier Carnnot

Meriem Bouras

Frederic Augier

Marc Jacquin

Nicolas Lopes Ferreira

Fadhel Ben Chaabane

Damien Hudebine

Sophie Couderc

Frederic Monot

Mohamed Fadhel Ben Chaabane

Pierre Antoine Bouillon

Benjamin Clement

Flora Ghisoni

Mathieu Aragones

Severine Louesdon-jeunet

Matthieu Aragones

Meriem Bouras Galinie

Stéphanie Fleurier

Réjane Dastillung

Anais Guillaume

The present invention relates to a process for treating lignocellulosic biomass, successively comprising

Process for treating lignocellulosic biomass

The present invention concerns a method for cleaning a reactor () for treating a lignocellulosic biomass (P), said method comprising the following steps:

Method for cleaning a reactor for processing a lignocellulosic biomass

The present invention relates to a process for treating a lignocellulosic biomass pretreated beforehand (), said process comprising the extraction of the free sugars from said pretreated biomass using an alcoholic or aqueous-alcoholic extraction solution (), so as to obtain a liquid phase enriched in free sugars, called liquor (), and a solid phase depleted in free sugars, called must ().

The invention relates to a process for treating a lignocellulosic biomass comprising a solids content of not more than 80% by weight, said process comprising the use of at least one reactor () for treating said biomass, in which the or at least one of said reactors is fed with biomass via a feed means () creating a pressure increase between the biomass inlet and the biomass outlet of said feed means, in which said feed means is washed by circulation of a washing fluid between a washing inlet () and a washing outlet (). According to the process, at least a portion of the washing fluid () exiting the fluid outlet of the at least one feed means () is reintroduced into the washing inlet of the same feed means or of another of said feed means.

Lignocellulosic biomass treatment method

The subject of the invention is a process for treating lignocellulosic biomass comprising the following steps:

Method for treating a lignocellulosic biomass

The invention concerns a method for treating lignocellulosic biomass, said method comprising the following steps: a, Preparing an impregnation liquor () containing a chemical catalyst intended to impregnate the biomass b. Introducing the crushed biomass () through an inlet of an impregnation reactor (), said inlet being situated in a first impregnation area () of said impregnation reactor that comprises two superposed areas, said first impregnation area and a second so-called dewatering area () above the impregnation area c. Introducing the liquor () through a first liquor inlet situated in said first impregnation area () of the reactor, d. Introducing said liquor () into said reactor through a second liquor inlet in another area of the reactor () situated below the biomass inlet in the first impregnation area (). The invention also concerns the facility for implementing the method.

Method for treating lignocellulosic biomass

A process for producing cellulolytic and/or hemicellulolytic enzymes with a strain of microorganism belonging to the family of filamentous fungi. The process includes growing the fungi in an aqueous culture medium, in the presence of at least one carbon-based growth substrate, in a stirred and aerated bioreactor. It also includes the production of enzymes, starting with the aqueous culture medium in the presence of at least one inductive carbon-based substrate and also inducing the production of hydrophobins. Further, at least a portion of the hydrophobins produced in step (b) are reintroduced into the growth step (a).

Process for producing enzymes with a strain belonging to a filamentous fungus

The invention relates to a process for treating lignocellulosic biomass by means of an acidic liquor in order to produce 'second-generation' (2G) sugary liquors. These sugary liquors may be used to produce other products via a biochemical pathway (e.g. alcohols such as ethanol, butanol or other molecules, for example solvents such as acetone, etc.). This process comprises analysis of the liquid streams withdrawn during the process and adjustment of the composition of the impregnation liquor so as to keep the acidic power of said streams constant.

Method for treating lignocellulosic biomass by impregnation

A process for producing oligosaccharides from lignocellulosic biomass, having the following steps:

Process for the production of oligosaccharides from lignocellulosic biomass

The present invention concerns a process for the production of an aqueous mixture comprising isopropanol, n-butanol and ethanol, comprising a step in which an aqueous solution containing C5 and/or C6 sugars and acetate is fermented under strict anaerobic conditions in the presence of a fermenting microorganism of the genusand in which said aqueous solution has an acetate concentration in the range 0.5 to 10 g/L and a ratio by weight of (acetate)/(sum of C5 and/or C6 sugars) in the range 0.005 to 0.35 g/g.

IBE fermentation method

The invention relates to a process for the production of alcohols from biomass that comprises a stage in which at least one aqueous internal flow that comprises at least one alcohol that has n carbon atoms, with n between 2 and 5, is recycled, provided that when the alcohol comprises 2 carbon atoms, it is mixed with at least one other alcohol in such a way as to recover a vapor phase effluent that contains alcohols exiting from said pretreatment reactor.

Method for producing alcohols and/or solvents from a biomass, including recirculating an internal flow including alcohols and/or solvents upstream from or within the pretreatment

The present invention describes a process for the production of alcohols and/or solvents from a cellulosic or lignocellulosic substrate, comprising at least the following steps:

Process for the production of alcohols and/or solvents from lignocellulosic biomass with acid recycle of solid residues

Embodiments provided here relate to second generation processes for the production of alcohols or solvents, wherein the lignocellulosic or cellulosic biomass undergoes a pre-treatment before being converted into ethanol after an enzymatic hydrolysis and fermentation. The glucidic polymers of the pre-treated plant material are hydrolysed by cellulases. The alcoholigenic microorganisms used for the ethanolic fermentation principally use hexoses, for example, glucose and mannose. The alcohols of the liquor, with or without separation of the suspended material are extracted by distillation. The stillage, containing pentoses which have not been used, are fermented into an ex-pentose ethanolic liquor and at least a portion of the liquor is recycled upstream of the enzymatic hydrolysis. The enzymatic hydrolysis and the ethanolic fermentation are thus carried out separately or simultaneously in the presence of a portion of the ethanolic liquor, which mixture does not interfere with the performance of the enzymes and microorganisms.

Process for the production of ethanol and solvents from lignocellulosic biomass with recycling of an ethanolic liquor obtained from the fermentation of pentoses

The process for the production of alcohol and/or solvent from a biomass feedstock comprises the stages for pretreatment (P) of the biomass feedstock, for enzymatic hydrolysis (Hand HF), and for fermenting the hydrolyzate (HF). To prevent solids from being sent and to facilitate operating the section for purifying the fermentation products, at least a portion of the solid material in the fermentation wine is extracted (Ex) to obtain a stream of solid residue () comprising lignin and a fermentation wine () that is low in solid material. Then, the stream of solid residue is washed (L) with a liquid stream to recover a liquid stream that is enriched with fermentation products (). The liquid stream that is enriched with fermentation products () is recycled in the enzymatic hydrolysis stage (H) to recover any fermentation product and to increase the overall yield of the process.

Method for producing alcohols and/or solvents from lignocellulosic biomass with washing of the solid residue obtained after fermentation

This invention describes a process for the production of second generation alcohols and/or solvents starting from cellulosic or lignocellulosic biomass wherein the lignocellulosic or cellulosic biomass undergoes a pretreatment before being converted into ethanol after an enzymatic hydrolysis and an ethylic fermentation, wherein glucidic polymers of the pretreated plant are hydrolyzed by cellulases; microorganisms that primarily use hexoses and preferably glucose and mannose are used for the ethylic fermentation; wines, with or without separation of materials in suspension are extracted by distillation; pentoses in the vinasses are fermented by a solventogenic microorganism into a butyl wine, and at least one portion of the butyl wine is recycled upstream from enzymatic hydrolysis.

Growing community of inventors

Lyons, France

Caroline Aymard