Cellulase and xylanase production by Aspergillus niger KKS in various bioreactors

S. W. Kim, S. W. Kang, J. S. Lee

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Aspergillus niger KKS, a laboratory isolate, has previously been shown to have considerable cellulolytic and hemicellulolytic activity when grown on rice-straw. In the present work, we have compared the activities, yields and productivities of cellulase and xylanase obtained in shake-flask, stirred-tank, bubble-column, and air-lift reactors. In general, better yield and productivity were shown in a bubble-column and an external-loop air-lift than in the stirred-tank reactor. The highest yield and productivity of cellulase were 84 FPA IU/g and 9.7 FPA IU/l.h, obtained by fed-batch mode in the bubble-column and in the stirred-tank reactor respectively. In the case of P-glucosidase, the highest yield and productivity were 370 U/g and 26 U/l.h in an external-loop air-lift reactor. For xylanase, the highest yield was 9100 U/g in a bubble-column, and the highest productivity was 823 U/l.h in an extemal-loop air-lift reactor with fed-batch mode.

Original languageEnglish
Pages (from-to)63-67
Number of pages5
JournalBioresource technology
Volume59
Issue number1
DOIs
Publication statusPublished - 1997 Jan

Keywords

  • Aspergillus niger
  • Bioreactors
  • Cellulase
  • Xylanase

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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