Carob pod: A new substrate for citric acid production by Aspergillus niger

Authors
Citation
T. Roukas, Carob pod: A new substrate for citric acid production by Aspergillus niger, APPL BIOC B, 74(1), 1998, pp. 43-53
Citations number
31
Categorie Soggetti
Biotecnology & Applied Microbiology","Biochemistry & Biophysics
Journal title
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
ISSN journal
02732289 → ACNP
Volume
74
Issue
1
Year of publication
1998
Pages
43 - 53
Database
ISI
SICI code
0273-2289(199807)74:1<43:CPANSF>2.0.ZU;2-Y
Abstract
The production of citric acid from carob pod extract by A. niger in surface fermentation was investigated. A maximum citric acid concentration (85.5 g /L), citric acid productivity (4.07 g/L/d), specific citric acid production rate (0.18 g/g/d), and specific sugar uptake rate (0.358 g/g/d) was achiev ed at an initial sugar concentration of 200 g/L, pH of 6.5, and a temperatu re of 30 degrees C. Other kinetic parameters, namely, citric acid yield, bi omass yield, specific biomass production rate, and fermentation efficiency were maximum at pH 6.5, temperature 30 degrees C, and initial sugar concent ration 100 g/L. The external addition of methanol into the carob pod extrac t at a concentration up to 4% (v/v) improved the production of citric acid.