Abstract: The present invention relates to the preparation of organic molecules by anaerobic fermentation of biomass, in which the fermentation liquor is aerated prior to the organic molecule recovery step.

Abstract: The present technology relates to a method for preparing a mixture of solid potassium salts from a fermentation juice from a fermentation process for the production of chemical compounds in a pH-controlled fermentation medium by adding of a base comprising potassium hydroxide. The method comprises adding an acid to the fermentation juice in an amount sufficient to cause the precipitation of the mixture of potassium salts, and then separating the mixture of salts of potassium solid potassium acidified fermentation juice. The present technology also relates to the mixture of potassium salts obtained by said method and its use as fertilizer.

Abstract: The process involves extracting carboxylic acids having from one to nine carbons, the carboxylic acids produced by microorganisms in a fermentation reactor by anaerobic fermentation from fermentable biomass. The extraction is a liquid-liquid type, and includes a) choosing an endogenous extraction solvent among at least one of the carboxylic acids, such that the number of carbons of the solvent is greater than or equal to the number of carbons of the carboxylic acid to be extracted, b) bringing the extraction solvent chosen into contact with the fermentation medium, without interrupting the fermentation, outside the fermentation reactor, c) separating (6) the fermentative metabolites from the extraction solvent by at least one distillation, and d) collecting and storing or using the fermentative metabolites obtained in step c). The invention also relates to a facility for carrying out the process.

Abstract: The process for producing organic molecules from fermentable biomass includes a step of anaerobic fermentation (5) producing volatile fatty acids (6), these precursors being transformed into final organic molecules by non-fermentation means. It also includes at least the following steps: a) extracting (9) at least one portion of the volatile fatty acids from the fermentation medium in such a way that the production of fermentation metabolites by the microorganisms (M) is not affected, and introducing a portion of the liquid phase (11) containing microorganisms from the extraction (9), b) synthesizing (13) organic molecules from the fermentation metabolites or from the volatile fatty acids extracted in step a)-c) continuing steps a) to b) until the final molecules are obtained, in terms of amount and quality. The invention also relates to an installation for implementing the process.

Abstract: Process for extracting volatile fatty acids (VFA), organic molecules called precursors produced by microorganisms (M) in a fermentation reactor (2) by anaerobic fermentation (3) using fermentable biomass (1), said molecules being fermentative metabolites, comprising at least the following steps: a) selecting an extraction means (8) from extraction means that is, at least, insoluble in the fermentation medium and the processing conditions of which preserve the capacity of the microorganisms (M) present in the fermentation medium to produce the molecules, b) bringing the chosen extraction means (8) into contact (9) with the fermentation medium without interrupting the fermentation (3), c) recovering (12) the extracted molecules, at a pH lower than 4.5, by the extraction means (8) outside the fermentation reactor (2). The invention also relates to an installation for implementing the method.

Abstract: A process for preserving the initial fermentable potential of an organic substrate over time is presented. The method comprises a) determining the moisture content (HM) of the organic substrate, b) comparing the determined moisture content (HM) to a predefined moisture level (HD), c) storing only the organic substrate of which the moisture content (HM) determined in step a) corresponds to the predefined moisture content (HD), d) when a fermentable potential cannot be determined based on the moisture content (HM) alone during steps a) and c), taking measurements of the methanogenic potential of the biomass, e) comparing the measurements of the methanogenic potential of the biomass obtained during step c) to that of step a), and f) adapting the storage conditions to keep the moisture content (HM) of the organic substrate collected at a value that of the predefined moisture content (HD).

Abstract: The process for producing amino acids from volatile fatty acid (VFA) molecules, referred to as precursors, produced by anaerobic fermentation from fermentable biomass, comprises at least the following steps: a) extracting the volatile fatty acid (VFA) molecules, without stopping the fermentation, via an extraction means chosen from means that are, at least, insoluble in the fermentation medium, b) collecting, outside the fermentation reactor, the volatile fatty acid (VFA) molecules once they have been extracted, c) synthesizing, by halogenation, using a type of volatile fatty acid (VFA) chosen from the volatile fatty acids collected in step b) and defined according to the desired type of amino acid, a given ?-halo acid, d) synthesizing from this ?-halo acid a defined amino acid.

Abstract: Process for extracting volatile fatty acids (VFA), organic molecules called precursors produced by microorganisms (M) in a fermentation reactor (2) by anaerobic fermentation (3) using fermentable biomass (1), said molecules being fermentative metabolites, comprising at least the following steps: a) selecting an extraction means (8) from extraction means that is, at least, insoluble in the fermentation medium and the processing conditions of which preserve the capacity of the microorganisms (M) present in the fermentation medium to produce the molecules, b) bringing the chosen extraction means (8) into contact (9) with the fermentation medium without interrupting the fermentation (3), c) recovering (12) the extracted molecules, at a pH lower than 4.5, by the extraction means (8) outside the fermentation reactor (2). The invention also relates to an installation for implementing the method.

Abstract: The process for producing polyhydroxyalkanoates or PHA from volatile fatty acid (VFA) molecules, referred to as precursors, produced by anaerobic fermentation from fermentable biomass, characterized in that it comprises at least the following steps: a) extracting the volatile fatty acid (VFA) molecules, without stopping the fermentation, via an extraction means chosen from means that are, at least, insoluble in the fermentation medium, b) collecting, outside the fermentation reactor, the volatile fatty acid (VFA) molecules once they have been extracted, c) synthesizing, by halogenation, using a type of volatile fatty acid (VFA) chosen from the volatile fatty acids collected in step b) and defined according to the desired type of PHA, a given ?-halo acid, d) synthesizing from this ?-halo acid molecules of a given ?-hydroxy acid by reaction with a base, e) polymerizing using the ?-hydroxy acid obtained a defined polyhydroxyalkanoate (PHA).