A technique of ethanol fermentation by immobilized saccharamyces cerevisiae combined with membrane distillation (MD) was studied. A free cell fennentor and a immobilized cell reactor ware coupled with a plat MD module separately. Processes of fennention of free cell and immobilized cell and coupled process were experimentally evaluated respectively. In the same cultural condition, ethanol productivity of free cell was 2.4 g /l · hr while that of immobilized cell was 22.6 g / l · hr. Coupled with MD, ethanol productivity by immobilized yeast was 30.0 g / l · hr. With the fermentation proceeding, the permeate flux decreased while the selectivity kept unaltered. The deterioration was likely due to membrane fouling caused by culture medium.
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机译：研究了固定化啤酒酵母与膜蒸馏（MD）相结合的乙醇发酵技术。分别与plat MD模块耦合的游离细胞粉化剂和固定化细胞反应器皿。分别对游离细胞和固定细胞的修饰过程以及偶联过程进行了实验评估。在相同的培养条件下，游离细胞的乙醇生产率为2.4 g / l·hr，而固定化细胞的乙醇生产率为22.6 g / l·hr。加上MD，固定化酵母的乙醇生产率为30.0 g / l·hr。随着发酵的进行，渗透通量减少，而选择性保持不变。劣化可能是由于培养基引起的膜污染。
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