title: Using thermophilic anaerobic digestate effluent to replace freshwater for bioethanol production.
abstract: The possibility of using anaerobic digestate effluent (ADE) to replace freshwater and nutrients for bioethanol production was explored. The ethanol concentration yielded from ADE and post-centrifuged ADE supernatant was 79.60±1.75 g/L and 78.33±1.66 g/L, respectively, with a 24% dry mass (DM) of soft wheat. Ethanol production was enhanced in ADE by as much as 18% in comparison to the production in freshwater (66.61±0.28 g/L, p<0.01). Without yeast nutrients, ADE fermentation yielded an ethanol concentration of 81.10±2.87 g/L, which was significantly higher than that in freshwater fermentation (59.67±1.79 g/L). Analysis showed that ADE contained rich nitrogen, proteins and minerals. After one-step distillation, the ethanol concentration attained was 700.05±46.20 g/L in ADE as compared to 622.79±32.22 g/L in freshwater (p<0.05).
authors.affiliation: Highmark Renewables Research LP, AFDP Rm-1-037, 6004, 118 Street, Edmonton AB, Canada T6G 2E1. tj@highmark.ca
authors.forename: Tiejun
authors.initials: T
authors.lastname: Gao
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000379:methods*; D000431:Ethanol / Q000138:chemical synthesis*; D005285:Fermentation; D005618:Fresh Water; D013696:Temperature; D014865:Waste Disposal, Fluid
chemical_list: D056804:Biofuels; D000431:Ethanol