FIELD: biotechnology.
SUBSTANCE: invention relates to biotechnological industry. Method for producing a chemical product produced from a microorganism (microorganisms) using continuous fermentation of biomass-derived sugar liquid. Method comprises filtering a culture liquid of a microorganism(s) through a separation membrane; retaining unfiltered liquid in, or refluxing unfiltered liquid to, the culture liquid; adding a fermentation feedstock to the culture liquid and recovering a product. Ratio between the hexose and the pentose contained in the sugar liquid is 1:9 to 9:1, wherein said pentose is xylose. Oxygen transfer coefficient (Kla) is not more than 150 h-1. For pentose metabolism microorganism use(s) xylose isomerase.
EFFECT: invention provides high output of chemical substance.
6 cl, 17 tbl, 39 ex
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