Abstract: Provided is a method for producing an organic substance, in which an organic material (metabolite) derived from a microorganism is reduced while retaining a nutritive substance in an organic substance-containing solution discharged from a fermentation tank containing the microorganism, whereby various nutritional elements contained in the organic substance-containing solution can be reused with high efficiency.

Abstract: The present invention provides an apparatus and a method which can be used for producing an organic substance effectively from a synthesis gas obtained from a waste incinerator. The apparatus 1 for producing an organic substance from waste, comprises a synthesis gas generation furnace 11, a fermenter 13, and a nutrient feeder. The synthesis gas generation furnace 11 generates a synthesis gas by partial oxidation of waste. The fermenter 13 contains a microorganism which produces an organic substance from the synthesis gas. The nutrient feeder 12 feeds a solid or liquid nutrient to the fermenter 13 when an amount of the synthesis gas supplied to the fermenter 13 is insufficient.

Abstract: A recombinant cell having a function of synthesizing acetyl-CoA from methyltetrahydrofolate, carbon monoxide, and CoA, including: a gene that expresses an exogenous NAD(P)H consumption pathway, the gene being expressed in the recombinant cell, wherein expression in at least one of endogenous NAD(P)H consumption pathways of the recombinant cell is down-regulated, and the endogenous NAD(P)H consumption pathway is different from the exogenous NAD(P)H consumption pathway, and the recombinant cell produces an organic compound having 4 or more carbon atoms from at least one selected from the group consisting of carbon monoxide and carbon dioxide via the exogenous NAD(P)H consumption pathway.

Abstract: Provided is a nucleic acid encoding a fusion protein, the fusion protein including a first protein selected from the group consisting of isoprene synthase and cyclic terpene synthase, and a FKBP family protein linked to the first protein. Provided is a fusion protein encoded by the nucleic acid. Provided is a recombinant cell including the nucleic acid and expressing the fusion protein. Further provided is a recombinant cell including a first nucleic acid encoding the first protein and a second nucleic acid encoding the FKBP family protein, and expressing the first protein and the FKBP family protein. As a host cell, a syngas-assimilating bacterium or a methanol assimilating bacterium can be used.

Abstract: Gas-utilizing microorganisms are stably cultured regardless of variations in a supply flow rate of a substrate gas. Gas-utilizing microorganisms 9 are cultured in a culture solution 2 in a culture tank 10. A substrate gas containing CO and H2 or the like is supplied to the culture tank 10 and is dissolved in the culture solution 2. When a supply flow rate of the substrate gas or predetermined constituents of the substrate gas to the culture tank 10 becomes a predetermined value or lower, a culture solution 2a is rapidly discharged from the culture tank 10.

Abstract: The present invention provides an apparatus and a method which can be used for producing an organic substance effectively from a synthesis gas obtained from a waste incinerator. The apparatus 1 for producing an organic substance from waste, comprises a synthesis gas generation furnace 11, a fermenter 13, and a nutrient feeder. The synthesis gas generation furnace 11 generates a synthesis gas by partial oxidation of waste. The fermenter 13 contains a microorganism which produces an organic substance from the synthesis gas. The nutrient feeder 12 feeds a solid or liquid nutrient to the fermenter 13 when an amount of the synthesis gas supplied to the fermenter 13 is insufficient.