The invention is directed to a process for producing one or more fermentation product in a multi-stage process including an inoculation reactor and at least one bioreactor. The inoculation reactor is fed a C1-containing gaseous substrate containing a reduced amount of hydrogen. The hydrogen is reduced to increase the proportion of CO in the C1-containing gaseous substrate being provided to the inoculation reactor. The inoculation reactor ferments the CO-rich C1-containing gaseous substrate and produces an inoculum, which is fed to at least one bioreactor. The bioreactor receives the C1-containing gaseous substrate, which may or may not contain reduced amounts of hydrogen, to produce one or more fermentation product. By providing a CO-rich C1-containing gaseous substrate to the inoculation reactor, both the inoculation reactor and the subsequent bioreactor(s), are able to have increased stability and product selectivity.

The invention relates to a recombinant cell, preferably a yeast cell comprising: a) one or more heterologous genes encoding a glycerol dehydrogenase activity; b) one or more genes encoding a dihydroxyacetone kinase (E.C. 2.7.1.28 and/or E.C. 2.7.1.29); c) one or more heterologous genes encoding a ribulose-1,5-biphosphate carboxylase oxygenase (EC 4.1.1.39, RuBisCO); and d) one or more heterologous genes encoding a phosphoribulokinase (EC 2.7.1.19, PRK); and optionally e) one or more heterologous genes encoding for a glycerol transporter. This cell can be used for the production of ethanol and advantageously produces little or no glycerol.

The invention relates to a recombinant cell, preferably a yeast cell comprising: a) one or more heterologous genes encoding a glycerol dehydrogenase activity; b) one or more genes encoding a dihydroxyacetone kinase (E.C. 2.7.1.28 and/or E.C. 2.7.1.29); c) one or more heterologous genes encoding a ribulose-1,5-biphosphate carboxylase oxygenase (EC 4.1.1.39, RuBisCO); and d) one or more heterologous genes encoding a phosphoribulokinase (EC 2.7.1.19, PRK); and optionally e) one or more heterologous genes encoding for a glycerol transporter. This cell can be used for the production of ethanol and advantageously produces little or no glycerol.

The invention relates to a process for the production of ethanol comprising fermenting a (optionally liquefied) corn slurry under anaerobic conditions in the presence of a recombinant yeast; and recovering the ethanol, wherein said recombinant yeast functionally expresses a heterologous nucleic acid sequence encoding a glucoamylase having an amino acid sequence according to SEQ ID NO: 1 or which glucoamylase is a functional homologue thereof having a sequence identity of at least 80%, or which glucoamylase is a functional homologue which is derived, by way of one or more amino acid substitutions, deletions or insertions, from the amino acid sequence of SEQ ID NO: 1, and wherein the process comprises dosing a glucoamylase at a concentration of 0.05 g/L or less.

The invention relates to a process for the production of ethanol comprising fermenting a (optionally liquefied) corn slurry under anaerobic conditions in the presence of a recombinant yeast; and recovering the ethanol, wherein said recombinant yeast functionally expresses a heterologous nucleic acid sequence encoding a glucoamylase having an amino acid sequence according to SEQ ID NO: 1 or which glucoamylase is a functional homologue thereof having a sequence identity of at least 80%, or which glucoamylase is a functional homologue which is derived, by way of one or more amino acid substitutions, deletions or insertions, from the amino acid sequence of SEQ ID NO: 1, and wherein the process comprises dosing a glucoamylase at a concentration of 0.05 g/L or less.

This disclosure describes processes for using a single cellulosic feedstock or a combination of two or more different cellulosic feedstocks with a starch component to produce a fermented product. The process includes separating the components of the cellulosic feedstocks with fractionation, pretreating a component with wet fractionation with chemicals, hydrolysis and fermentation of the pretreated feedstock(s) to produce cellulosic biofuel. The process may include combining the cellulosic feedstock(s) with other components to a cook and/or a fermentation process, distilling and dehydrating the combined components to produce the bio fuel. The process may also include producing a whole stillage stream from the feedstock(s) and mechanically processing the whole stillage stream to produce a high-value protein animal feed.

This disclosure describes processes for using a single cellulosic feedstock or a combination of two or more different cellulosic feedstocks with a starch component to produce a fermented product. The process includes separating the components of the cellulosic feedstocks with fractionation, pretreating a component with wet fractionation with chemicals, hydrolysis and fermentation of the pretreated feedstock(s) to produce cellulosic biofuel. The process may include combining the cellulosic feedstock(s) with other components to a cook and/or a fermentation process, distilling and dehydrating the combined components to produce the bio fuel. The process may also include producing a whole stillage stream from the feedstock(s) and mechanically processing the whole stillage stream to produce a high-value protein animal feed.

The invention relates to a process for the preparation of a sugar and/or fermentation product from lignocellulosic material.

The invention relates to a process for the preparation of a sugar and/or fermentation product from lignocellulosic material.

The invention relates to a method for preparing organic compounds with recovery of product liquids, which comprise short-chain and medium length-chain carboxylic acids having a chain length of from 2 to 16 carbon atoms, by anaerobic fermentation of biomass with mixed microorganism cultures with suppression of methane formation and by electrolytic treatment of these product liquids containing the carboxylic acids with a constant or varying oxidation flow for the recovery and isolation of the target compounds.