[The production of ethyl alcohol in waste sulfite liquor by free and immobilized Candida tropicalis ceppo 571 using batch and continuous systems].

In this study, the free and immobilized cells of Candida tropicalis ceppo 571 yeast were used for the production of ethanol. The yield of ethanol under anaerobic conditions was investigated. Batch technique in flasks and continuous in tubular bioreactor were also applied and the results were compared. It has been shown that the production of ethanol by the free cells was 2.36 times higher than the one by the immobilized cells. The continuous process resulted as the free cells produced ethanol 1.25 times more than the immobilized cells did.