Journal
BIOCHEMICAL ENGINEERING JOURNAL
Volume 80, Issue -, Pages 19-26Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bej.2013.09.002
Keywords
Bioreactors; k(L)a; Xylanase; beta-Xylosidase; Corncob; Aspergillus
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES/Brazil) [1162/10-1]
- Fundacao para a Ciencia e a Tecnologia (FCT/Portugal) [SFRH/BD/37082/2007]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/37082/2007] Funding Source: FCT
Ask authors/readers for more resources
Oxygenation is an important parameter involved in the design and operation of mixing-sparging bioreactors and it can be analyzed by means of the oxygen mass transfer coefficient (k(L)a). In this study, batch fermentations in stirred tank bioreactor (STB) and airlift bioreactor (ALB) were operated under a range of k(L)a values, in attempts to optimize and compare the activities of extracellular xylanase and beta-xylosidase synthesized by the fungus Aspergillus niger van Tieghem, using corncob as inducer source. The higher xylanase levels were observed on SIB (9000 U l(-1); k(L)a = 30 h(-1)), while the beta-xylosidase production was similar in both bioreactors. However, when the enzymatic activity was compared for the same k(L)a value (12 h(-1)) in SIB and ALB, the xylanase and beta-xylosidase productions were higher in ALB (7000 U l(-1) xylanase; 2100 U l(-1) beta-xylosidase) than SIB (4500 U l(-1) xylanase; 1800 Ul(-1) beta-xylosidase). (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available