سال انتشار: ۱۳۹۱
محل انتشار: چهاردهمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: ۵
Siyamak Pakdel – M.SC student, Department of chemical engineering, Amirkabir university of technology, Tehran, Iran
Farzaneh Vahabzadeh – Professor, Department of chemical engineering, Amirkabir university of technology, Tehran, Iran
Cellulose is the most abundant organic biopolymer on the earth mainly occurs in plants, although certain microorganisms are capable of producing this organic polymer (bacterial cellulose, BC). BC because of its unique structural characteristics is considered a new industrial material and its application in medical usage has been addressed. BC production by Acetobacter xylinum was studied in a batch system. According to the literature the monod kinetic model is not applicable in many fermentations. In the present study the logistic equation as a substrate-independent model was used to describe the growth of cellulose producing bacterial cells. Counting chamber method considering Neubauer ruling was used to measure cellulose producing cells. The cell growth reached to maximal point at ten days(2.905×۱۰۱۰ cells/L) while the cellulose production was highest after twelve days(1.622 g/L). The experimental results were described reasonably well with use of logistic model.