Ifp Energies Nouvelles

Lesaffre Et Compagnie

Institut National De La Recherche Agronomique (inra)

Agro Industrie Recherches Et Developpements A.r.d.

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

Flora Ghisoni

Caroline Aymard

Marcel Ropars

Sandra Menir

The invention relates to a method for propagating yeast, for use in the production of a fermentation product from lignocellulosic biomass, including the steps that consist of: a. providing a reactor; b. placing in contact in said reactor: a population of yeasts capable of metabolising pentoses and hexoses, with 0.2 to 2.0 g of yeast solids per kg of prepared complete medium, raw marc from the pretreatment of the lignocellulosic biomass, with a solids content (MS) of 8% to 15%, nutrients, and cellulases, with 5 to 15 mg of proteins per gram of MS; and c. incubating the mixture at a temperature of 25&#xb0; C. to 38&#xb0; C., preferably 28&#xb0; C. to 33&#xb0; C., in microaerobiosis, in which the saccharification of the raw marc and the growth of the yeast are carried out simultaneously.

Yeast propagation simultaneous with saccharification

The present invention describes a process for the production of alcohol, known as second generation production, from a lignocellulosic substrate, in which a controlled quantity of furfural is produced in situ and which comprises at least the following steps:

In situ production of furfural in a controlled amount in an alcohol production unit from a lignocellulosic biomass

Growing community of inventors

Saint Jeannet, France

Flora Ghisoni