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《中国化学工程学报(英文版)》 1997-01
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L-LACTIC ACID FERMENTATION IN A ROTATING-DISC CONTACTOR WITH SIMULTANEOUS PRODUCT SEPARATION BY ION-EXCHANGE

Lin Jianping Chen Bo Wu Jianping Cen Peilin Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China  
A rotating disk contactor(RDC) was designed to perform L-lactic acid fermentation with a filamentous fungi, Rhizopus oryzae, which was immobilized on the surfaces of the rotating discs. The bioreactor was operated using repeated-batch method as well as continuous feeding method. An anionic resin, D354, slightly basic in nature and of high selectivity and capacity was chosen for lactic acid separation. A coupled process of L-lactic acid fermentation and ion-exchange separation was evaluated experimentally. The results indicated that the pH value of the fermentation broth could be maintained at about 3 - 3.5 without any addition of alkali. The conversion ratio of glucose to L-lactic acid was about 0.7 g·g-1 and the fermentation rate reached as high as 62.5 g·h-1 · m-2.a
【Fund】: Supported by the National Natural Science Foundation of China.
【CateGory Index】: TQ028
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