title: Citric acid fermentation by magnetic drum contactor: use of methanol and ethanol for higher production.
abstract: Use of methanol or ethanol in the magneto-biotechnological technique was found to be enhance citric acid production in a magnetic drum contactor operation with Aspergillus niger AJ 117173. Continuous and repeated-batch fermentations were conducted with the addition of 2% ethanol. Continuous fermentation for 50 d gave a better citric acid yield (85%) and average productivity (3.8 g.l(-1).d(-1)) than repeated-batch fermentation over 60 d (65%, 2.3 g.l(-1).d(-1)).
authors.affiliation: Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh.
authors.forename: M L
authors.initials: ML
authors.lastname: Saha
authors.forename: Y
authors.initials: Y
authors.lastname: Sakai
authors.forename: F
authors.initials: F
authors.lastname: Takahashi