PROCESS FOR MICROBIAN PRODUCTION OF BIOMASS FERMENTATION PRODUCTS IN BIOFILME REACTOR AND A BIOFILME REACTOR

摘要

process for direct production of biomass fermentation products in a biofilm reactor. an oxygen-permeable but dense membrane (28) separates the oxygen supply compartment (30) from the fermentation compartment (31), which contains all the microorganisms, a nutrient medium and the pretreated lignocellulose. The oxygen needed for the growth and activity of aerobic cellulitic enzymes that produce microorganisms is exclusively transported from the oxygen supply compartment (30) across the membrane (28), which leads to an oxygen gradient within the biofilm growth. over the membrane (28). The oxygen-rich zone of the biofilm lies on the membrane (28), while the biofilm furthest from the membrane as well as the surrounding nutrient medium are depleted oxygen. In aerobic biofilm, extracellular enzymes are produced in situ and released into the nutrient medium, where they hydrolyze cellulose to hemicellulose in soluble sugars, which are then converted into the desired fermentation product by suitable microorganisms in the anaerobic zones of the cell. reactor (21). The process can be performed in batch mode as well as in a continuous mode.