Alcohol Production to reduce Energy Consumption by Membrane Separation and Heat Medium -Basic Studies on Alcohol Recovery with Fermentation Process Using the Membrane-

분리막과 열매체를 이용한 저에너지 소비형 알코올 제조 -분리막을 이용한 발효공정에서 알코올 회수의 기초적 연구-

Pervaporation can be successfully utilized to recover alcohol from fermentation broths and dilute process streams. Polydimethylsiloxane (thickness: $60\mu$m), such as hydrophobic membrane have been employed in this application to produce an enriched product. The fermented alcohol was continuously extracted, and simultaneously concentrated by pervaporation, from the membrane bioreactor, and the extracted alcohol concentration was 6 to 10 times higher than in the broth. This experimental conditions were 6-10 Torr vacuum line, pH=5, $32^{\circ}C$, 3.5 liters of working volume, 200rpm of agitator speed, and 0.14 wm aeration flow rate.