| 摘要 |
PURPOSE:To recover continuously a highly concentrated aqueous solution of alcohol without admixture of mold and medium solution, by forming partition walls consisting of a porous membranes having impermeability to microorganisms between medium solution feed baths and culture baths, and partition walls consisting of a specific hydrophobic porous membrane between the culture baths and recovery baths of aqueous solution of alcohol. CONSTITUTION:The fresh medium solution 20 is fed to the medium solution feed baths 2, permeated through the first membranes 11 and made to flow into the culture baths 1. The microorganism molds 10 are fed to the culture baths 1. The medium solution and the microorganism molds are preheated in order to keep the culture baths 1 at 30-60 deg.C, and the culture solution is subjected to a microorganism reaction with the microorganism molds. Alcohol vapor and water vapor are selectively permeated from a culture solution obtained in the culture baths 1 to the second membranes (hydrophobic porous membrane) 13, sent to the recovery baths 3 of aqueous solution of alcohol, and cooled by the cooling plate 31, to give an aqueous solution of alcohol. The aqueous solution of alcohol obtained by thermovaporization like this has high concentration, the aqueous solution is made to flow down along the surface of the cooling plate 31, and discharged from the outlet 34.
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