The study of membrane distillation used for separation of fermenting glycerol solutions

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• 作者：Marek Gryta ; ^{marek.gryta@zut.edu.pl} ; Agata Markowska-Szczupak ; Justyna Bastrzyk ; Wirginia Tomczak
• 关键词：Membrane distillation ; Membrane bioreactor ; Glycerol ; Fermentation
• 刊名：Journal of Membrane Science
• 出版年：2013
• 出版时间：15 March, 2013
• 年：2013
• 卷：431
• 期：Complete
• 页码：1-8
• 全文大小：1155 K

文摘

In this work the fouling of polypropylene membranes during the membrane distillation used for the separation of fermentation broth was studied. The glycerol fermentation was carried out using the following bacteria: Lactobacillus casei, Lactococcus lactis and Leuconostoc mesenteroides. During the process operation a large amount of biomass was deposited on the surface of membranes immersed in the broth, causing a decline of the permeate flux by 50 % . The majority of precipitate was removed using a multiple rinsing of the membranes with water, which restored the initial yield of the MD modules. Nutrients used for the preparation of broth (glycerol, peptone K and yeast extract) did not cause the membrane fouling. The used membranes did not undergo the wettability and a high degree of separation was maintained for 1000 h of membrane bioreactor operation. The application of membrane distillation allowed to separate the acetic acid from fermentation broth, which improved the conditions of bacterial growth.