期刊
LETTERS IN APPLIED MICROBIOLOGY
卷 46, 期 6, 页码 661-666出版社
BLACKWELL PUBLISHING
DOI: 10.1111/j.1472-765X.2008.02362.x
关键词
dual reactor; lactic acid fermentation; Lactobacillus delbrueckii; molasses; packed bed bioreactor; polyurethane foam
Aims: An integrated dual reactor system for continuous production of lactic acid by Lactobacillus delbrueckii using biofilms developed on reticulated polyurethane foam (PUF) is demonstrated. Methods and Results: Lactobacillus delbrueckii was immobilized on PUF, packed in a bioreactor and used in lactic acid fermentation. The rate of lactic acid production was significantly high with a volumetric productivity of 5 g l(-1) h(-1) over extended period of time. When coupled to a bioreactor, the system could be operated as dual reactor for over 1000 h continuously without augmentation of inoculum and no compromise on productivity. Conclusions: Polyurethane foams offer an excellent support for biofilm formation. Significance and Impact of the Study: The system was very robust and could be operated for prolonged period at a volumetric productivity of 4-6 g l(-1) h(-1).
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