Evaluation of Cell Growth and Substrate Consumption Kinetic of Five Different Lactobacilli in a Submerged Batch Whey Culture for Lactic Acid Production
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-28-7_002
تاریخ نمایه سازی: 15 آذر 1394
Abstract:
Cell growth and lactose consumption profile of five Lactobacilli: bulgaricus, casei, lactis, delbrueckii and fermentum were investigated. Cell growth and substrate utilization in a batch submerged culture of whey with added lactose were evaluated. Fitness assessment of experimental data on the cell growthand lactose consumption by Monod and Logistic kinetic models was performed using the curve-fitting tool in Matlab software. Lactobacillus delbrueckii subsp. bulgaricus PTCC1737 and Lactobacillusdelbrueckii subsp. lactis PTCC 1743 didn’t fit with any of the two studied kinetic models.Lactobacillus casei subsp. casei PTCC1608 showed good consistency with Monod and not acceptable fitting with Logistic kinetic model. Lactobacillus delbrueckii subsp. delbrueckii PTCC1333 andLactobacillus fermentum PTCC1744 had acceptable consistency with both studied models.Lactobacillus casei subsp. casei PTCC1608 showed the most consistency following Monod equation with R2, μmax and Ks of 0.965, 0.435 h-1 and 27.05 g L-1, respectively. Lactobacillus delbrueckii subsp. delbrueckii PTCC1333 (R2=0.926) had the most desired capability with Logistic equation with μmax and Xmax evaluated as 0.242 h-1 and 4.84 g L-1, respectively.
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Authors
f Ardestani
Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
f Rezvani
Department of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran
g.d Najafpour
Faculty of Chemical Engineering, Babol Nooshirvani University of Technology, Babol, Iran