Ifp Energies Nouvelles

Institut National De La Recherche Agronomique

Agro Industries Recherche Et Developpement

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

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

Romain Rousset

Laurent Bournay

Caroline Aymard

Abdelhakim Koudil

Damien Hudebine

Olivier Carnnot

Vincent Coupard

Sylvain Louret

Pierre-Antoine Bouillon

Mohamed Fadhel Ben Chaabane

Federico Battista

Melanie Gomez Almendros

Franck Gaviot-Blanc

Severine Louesdon-jeunet

Mélanie Gomez Almendros

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

Method for treating a lignocellulosic biomass

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 This process comprises analysis of the liquid streams withdrawn during the process and adjustment of the composition of the impregnation liquor so as to keep the acidic power of said streams constant.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

The invention relates to a method for separating, from a culture medium, an enzymatic cocktail and the fungus, the culture medium resulting from enzyme production by the fungus, method in which: said culture medium is subjected, in a period of no longer than 30 h from the halting of production, to a separation on a filter press lined with a fabric having a porosity of 3-20 &#x3bc;m, so as to obtain a filtrate having a corrected optical density OD at 600 nm of less than 2.5; and the liquid phase obtained is subjected to tangenital micro-filtration on a ceramic membrane having a cut-off limit of 0.5 to 1.4 &#x3bc;m, so that the corrected OD at 600 nm does not exceed 0.1.

Separation of enzymes fromby filter press and tangential filtration on a ceramic membrane

The invention concerns a continuous method for treating a lignocellulosic biomass before enzymatic hydrolysis, said method comprising a transfer of crushed then pressed biomass to a step of impregnation by an acid liquor, the impregnated biomass dripping over the area containing the impregnation liquor, then the resulting wet biomass is pressed and sent to a steam explosion step. The impregnation liquor is prepared in a dedicated area from the used liquor from the dripping operation and/or that from the pressing operation, prior to the explosion step. The invention also concerns the facility for implementing the method.

Method for treating lignocellulosic biomass by impregnation and steam explosion

The present invention relates to a sequentially fed process for enzymatic hydrolysis in which, under agitation, a pre-treated lignocellulosic substrate is brought into contact with water and with enzymes in a reactor, said process being characterised in that the sequential addition to the reactor of the pre-treated lignocellulosic substrate is carried out increasingly spread out over time, in order to obtain a predetermined final content of dry matter.

Sequentially-fed process for enzymatic hydrolysis with additions of pre-treated substrate increasingly spread out over time

The present invention concerns a production of liquefied lignocellulosic substrate by enzymatic reaction. 10% to 40% by weight dry matter of pre-treated lignocellulosic substrate is contacted, with water and enzymes at 0.1 to 60 mg of enzymes per gram of cellulose for a period of 1 to 24 hours. Over time, at least the value of one of the rheological characteristics of the reaction medium is measured. If a reduction of the value is detected over time, the following step a) is carried out:

Process for the production of optimised liquefied lignocellulosic substrate

The present invention describes a method of producing fatty acid alkyl esters and glycerin implementing, in a reaction section, a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol, and using a heterogeneous solid catalyst, comprising: The supernatant ester phase obtained after decantation is then optionally sent to a coalescer, also allowing separation of the glycerin, then to a purification stage by adsorption on solids. This improved method prevents microemulsion formation.

Separation improvement in a method of producing alkyl esters from vegetable or animal oil and an aliphatic monoalcohol

The present invention describes a method of producing fatty acid alkyl esters and glycerin implementing, in a reaction section, a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol, and using a heterogeneous solid catalyst, comprising: The supernatent ester phase obtained after decantation is then optionally sent to a coalescer, also allowing separation of the glycerin, then to a purification stage by adsorption on solids.

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Lyons, France

Romain Rousset