Gluconic acid production under varying fermentation conditions by Aspergillus niger

Om V. Singh, Rakesh K. Jain, Rajesh P. Singh

Research output: Contribution to journalArticle

Abstract

The production of gluconic acid with respect to varying substrate concentrations in submerged (SmF), semisolid-state (SmSF), surface (SF), and solid-state surface (SSF) fermentations was analyzed. Under the various fermentation conditions the biomass and specific growth rate varied with different concentrations of glucose. The highest level of gluconic acid (106.5 g dm-3) with 94.7% yield was obtained under SSF conditions. In all cases the maximum degree of gluconic acid conversion was observed at on initial substrate concentration of 120 g dm-3. The rate of glucose uptake increased on increasing the initial glucose concentration and glucose utilization was observed to be highest (89-94%) in the SmSF process and was comparable with the SSF and SF processes. The maximum rate of cell growth was obtained in all processes at an initial glucose concentration of 120 g dm-3. The gluconic acid production and change in pH were analyzed at varying time intervals and it was observed that the SmF and SmSF processes were completed within 6 days of incubation whereas the highest yield was observed after 12 days of incubation and continued thereafter in the SSF process.

Original languageEnglish (US)
Pages (from-to)208-212
Number of pages5
JournalJournal of Chemical Technology and Biotechnology
Volume78
Issue number2-3
DOIs
StatePublished - Feb 2003
Externally publishedYes

Fingerprint

Aspergillus niger
Aspergillus
Surface states
Fermentation
fermentation
Glucose
glucose
Acids
acid
incubation
Cell growth
substrate
Substrates
Growth
Biomass
gluconic acid
biomass

Keywords

  • Aspergillus niger
  • Gluconic acid
  • Semisolid-state fermentation
  • Solid-state surface fermentation
  • Submerged fermentation
  • Surface fermentation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Biotechnology
  • Bioengineering

Cite this

Gluconic acid production under varying fermentation conditions by Aspergillus niger. / Singh, Om V.; Jain, Rakesh K.; Singh, Rajesh P.

In: Journal of Chemical Technology and Biotechnology, Vol. 78, No. 2-3, 02.2003, p. 208-212.

Research output: Contribution to journalArticle

Singh, Om V. ; Jain, Rakesh K. ; Singh, Rajesh P. / Gluconic acid production under varying fermentation conditions by Aspergillus niger. In: Journal of Chemical Technology and Biotechnology. 2003 ; Vol. 78, No. 2-3. pp. 208-212.
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