METHODS FOR REDUCING ENZYME CONSUMPTION IN SECOND GENERATION BIOETHANOL FERMENTATION IN THE PRESENCE OF LIGNIN

摘要

PROVIDED ARE METHODS OF LIQUEFACTION, SACCHARIFICATION AND FERMENTATION OF PRETREATED LIGNOCELLUIOSIC BIOMASS IN PRODUCTION OF BIOETHANOL. ADDITION OF PEG OR SURFACTANT IS EFFECTIVE TO ENHANCE CELLULASE HYDROLYSIS YIELDS AT HIGH DRY MATTER (20%) AT SURPRISINGLY LOW CONCENTRATIONS COMPARED WITH COMPARABLE RESULTS IN LOW DRY MATTER HYDROLYSIS. THIS EFFECT IS MOST PRONOUNCED AT COMPARATIVELY LOW CELLULASE LOADING 7 FPU (G DM)-1. AT HIGH DRY MATTER CONTENT, CELLULASE ENZYME CONSUMPTION CAN BE REDUCED, WITHOUT LOSS OF HYDROLYSIS YIELD, BY ADDITION OF SMALL QUANTITIES OF PEG OR SURFACTANT. FIGURE NO. 4