Additives for bioethanol fermentation process and method for producing bioethanol

摘要

The purpose of the present invention is to provide an additive that is capable of improving bioethanol production efficiency. The additive for a bioethanol fermentation process according to the present invention is characterized by comprising: a polyoxyalkylene alkyl compound (A) having a Griffin HLB value of 0-6; a polyoxyalkylene polyol (B); and a base oil (C) which is liquid at 25°C. The compound (A) is preferably a mixture of a compound represented by formula (1) with a compound represented by formula (2). R1O-(AO)m-R2 (1) R3O-(AO)n-(EO)p-R4 (2) In formulae (1) and (2): R1 and R3 represent an alkyl or alkenyl; R2 and R4 represent a hydrogen atom or a monovalent organic group; AO represents an oxyalkylene having 3-18 carbon atoms, a reaction residue of glycidol, a reaction residue of an alkyl glycidyl ether or a reaction residue of an alkenyl glycidyl ether; EO represents oxyethylene; m and n are 1-100; and p is 3-10.