Abstract:
PURPOSE: A method for enhancing the production of butyric acid using Clostridium tyrobutyricum is provided to effectively enhance the production of butyric acid by adding an electron mediator to a medium of the strain and fermenting, or supplying an electron to the medium. CONSTITUTION: A method for enhancing the production of butyric acid using Clostridium tyrobutyricum comprises the step of adding an electron mediator to a medium of the strain and fermenting, or supplying an electron to the medium using a reduction electrode and fermenting. The method enhances the production of butyric acid without reduction or generating byproducts. The byproduct is an acetic acid. The electron mediator is a methyl viologen (MV).
Abstract:
PURPOSE: Wood biomass saccharified liquid is provided to remove or reduce toxicity of lignin originated fermentation inhibitors, to reduce loss of sugar, and to minimize processing costs. CONSTITUTION: Saccharified liquid made by hydrolysis pre-processing of wood biomass is prepared. Toxicity is reduced or removed by adding a surfactant into the saccharified liquid. The surfactant forms a micelle by reacting with a hydrophobic component of a phenolic compound in the saccharified liquid. The wood biomass saccharified liquid in which toxicity is reduced or removed is fermented. The fermentation is performed by adding a microorganism in the saccharified liquid. More than one phenolic compound is selected from a group consisting of ferulic acid, coumaric acid, benzoic acid, syringic acid, vanilic acid, valilin, 4-hydroxybenzoic acid, 4-hydroxybenzaldehyde, and syringaldehyde. The content of the surfactant is 0.01-10 g/L based on the saccharified liquid. [Reference numerals] (AA) Control group; (BB) Coumaric acid; (CC) Ferulic acid; (DD) Vanilic acid; (EE) Syringaldehyde; (FF) Oppositional substance(1g/L);
Abstract:
PURPOSE: A raoultella sp. B6 capable of having a superior 2,3- butanediol production yield is provided to manufacture 2,3- butanediol at high yield and to reduce manufacturing costs. CONSTITUTION: A raoultella sp. B6 capable of has a superior 2,3- butanediol production yield. A manufacturing method of the 2,3- butanediol comprises the following steps: cultivating the raoultella sp. B6 in a culture medium including carbon source; and collecting the 2,3- butanediol from the culture medium. The culturing temperature of cultivating step is 20-30 deg. Celsius. The initial pH of cultivating step is 6.5-7.5. The culture medium is aerobic culture medium.