Method and apparatus for producing ethanol through synchronous saccharification and fermentation of lignocellulose

• Main Authors: LIU QINGJUAN, ZHAO JUNFENG, ZHU TAO, ZHANG JUN, AI YANLIN, SHI FENGYU, ZHAO XIAOJUN, ZHANG FENGTAO, ZHAO FENG, WANG JINGRUI, ZHANG HUI, LIU XUEXIAN, LIU LI
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2014
• Subjects: APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; SPIRITS; VINEGAR; WINE

The invention provides a method for producing ethanol through synchronous saccharification and fermentation of lignocellulose. The method comprises the following steps: carrying out saccharification on lignocellulose in a saccharification kettle by using cellulase; collecting a saccharification liquid obtained after enzymatic hydrolysis; and carrying out fermentation on the saccharification liquid in a fermentation kettle by using a yeast culture so as to obtain a fermentation broth containing ethanol. The method is characterized in that a part of the saccharification liquid is collected from the saccharification kettle and conveyed to a filtering device during saccharification, a solid phase obtained after filtration is returned to the saccharification kettle, a liquid phase obtained after filtration is delivered to the fermentation kettle, and a same volume of the fermentation broth is cycled and returned to the saccharification kettle. The invention further provides an apparatus for producing ethanol throu