METHOD FOR PRODUCING ETHANOL BY COUPLING IMMOBILIZATION BED FERMENTATION WITH SEPARATION

摘要

Provided is a method for producing ethanol by coupling microorganism immobilization bed fermentation with separation. The method comprises the following steps: (1) immobilizing yeast cells in a fiber material in a bioreactor; (2) adding a fermentation medium for ethanol cyclic fermentation; (3) using a pervaporation membrane to separate fermentation liquid, wherein membrane trapped liquid returns to the bioreactor, and permeation liquid returns to the bioreactor after being absorbed by a resin column; and (4) separating absorbed ethanol from the resin column. On a basis of producing ethanol by using the fiber material to perform immobilization fermentation on yeast cells, and by installing a membrane separation apparatus and a resin separation apparatus, the method achieves an objective of simultaneous fermentation and separation. The method uses a immobilization carrier that is stable and non-toxic, and has a good absorption effect, thus improving an ethanol resistant characteristic. The resin separation method consumes low power to produce ethanol, has a good separation effect, and greatly improves a yield rate of ethanol.