초록
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+/-1.75g/L and 78.33+/-1.66g/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+/-0.28g/L, p<0.01). Without yeast nutrients, ADE fermentation yielded an ethanol concentration of 81.10+/-2.87g/L, which was significantly higher than that in freshwater fermentation (59.67+/-1.79g/L). Analysis showed that ADE contained rich nitrogen, proteins and minerals. After one-step distillation, the ethanol concentration attained was 700.05+/-46.20g/L in ADE as compared to 622.79+/-32.22g/L in freshwater (p<0.05).