γ-Alumina as a process advancing tool for a new generation biofuel

► Continuous anaerobic fermentation of glucose for biofuel production. ► Promotion of acidogenesis by γ-alumina. ► Acetic acid was more than 90% of total VFAs produced. ► γ-Alumina enhanced production of acetic acid and ethanol. ► Ethanol levels able to esterify 85% of the produced VFAs.