Influence of agitation speeds and aeration rates on the Xylanase activity of Aspergillus niger SS7

Brazilian Archives of Biology and Technology

Yasser Bakri²  Alaa Mekaeel¹  Amal Koreih¹ 

[1] ,AECS Department of Molecular Biology and Biotechnology Damascus,Syria

关键词: Aspergillus niger;    agitation;    aeration;    xylanase;   

DOI  :  10.1590/S1516-89132011000400003

来源: SciELO

【 摘 要 】

In this study, the effect of agitation and aeration rates on xylanase activity of Aspergillus niger SS7 in 3-litre stirred tank bioreactor was investigated. The agitation rates tested were 100, 200 and 300 rpm at each airflow rates of 0.5, 1.0 and 1.5 vvm. The maximum xylanase activity in mono- agitator system was at the agitation speed of 200 rpm and aeration rate of 1.0 vvm. In bi-agitator system, at low agitation speed (100 rpm), the xylanase activity was enhanced by 13% compared to mono- agitator system for an aeration rate of 1.0 vvm. Xylanase productivity in continuous culture was higher by approximately 3.5 times than in batch culture.

【 授权许可】

CC BY-NC   
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