Abstract
The aim of this study was to produce β-fructofuranosidase enzyme by Rhodotorula glutinis SO28, using sugar beet (Beta vulgaris) as carbon source due to its high sucrose content and easy availability. β-Fructofuranosidase production was carried out in submerged fermentation. Taguchi orthogonal array (OA) design of experiment (DOE) method was employed for optimization process of β-fructofuranosidase production by R. glutinis SO28. An OA layout of L16 was constructed with five influential factors on β-fructofuranosidase biosynthesis namely, carbon source (sugar beet), initial pH, incubation temperature, agitation speed and incubation time. The average results of β-fructofuranosidase yield obtained from the determined 16 batches were processed with Minitab® 16.2.3 software at “larger is better” as quality character. The results showed that the maximum β-fructofuranosidase activity was obtained as 21.11 ± 0.47 U/mL, which was close to the predicted result (21.78 ± 0.43 U/mL). Consequently, sugar beet can be suggested as an economical substrate for β-fructofuranosidase production. Besides, use of Taguchi DOE enhanced enzyme activity about 3-fold when compared with unoptimized condition.
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