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Titolo:
EFFECT OF MICRO-AERATION ON THE GROWTH OF CANDIDA-PSEUDOTROPICALIS AND PRODUCTION OF ETHANOL DURING BATCH FERMENTATION OF CHEESE WHEY
Autore:
GHALY AE; ELTAWEEL AA;
Indirizzi:
TECH UNIV NOVA SCOTIA,DEPT AGR ENGN,POB 1000 HALIFAX NS B3J 2X4 CANADA
Titolo Testata:
Bioresource technology
fascicolo: 3, volume: 52, anno: 1995,
pagine: 203 - 217
SICI:
0960-8524(1995)52:3<203:EOMOTG>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PACHYSOLEN-TANNOPHILUS; XYLOSE FERMENTATION; ALCOHOL PRODUCTION; ACID WHEY; YEAST; SHEHATAE; SYSTEMS; OXYGEN;
Keywords:
BATCH FERMENTATION; ETHANOL; CHEESE WHEY; CELL GROWTH; SUBSTRATE UTILIZATION; MICRO-AERATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
A.E. Ghaly e A.A. Eltaweel, "EFFECT OF MICRO-AERATION ON THE GROWTH OF CANDIDA-PSEUDOTROPICALIS AND PRODUCTION OF ETHANOL DURING BATCH FERMENTATION OF CHEESE WHEY", Bioresource technology, 52(3), 1995, pp. 203-217

Abstract

Four pilot-scale batch reactors of 5 l volume each were used to studythe effect of micro-aeration (240-720 ml/min or 0.05-0.15 v/v/min) onthe cell growth rate, substrate utilization and ethanol production during cheese whey batch fermentation using the yeast Candida pseudotropicalis at lactose concentrations ranging from 50 to 200 g/l. The results indicated that micro-aeration had a significant effect on the maximum cell concentration and the specific growth rate. It improved the viability of the yeast cells and enhanced the substrate utilization rateand the ethanol yield. The optimum micro-aeration level was found to be 0.1 v/v/min; further increases in the rate of micro-aeration resulted in an increased biomass concentration and decreased ethanol production as more lactose was utilized for biomass synthesis. The maximum ethanol yield (98.3%) was obtained with the micro-aeration rate of 0.1 v/v/min and the 150 g/l initial substrate concentration. The ethanol productivity (g/l/h) under these conditions was 35% higher than that obtained at 150 g/l initial substrate concentration with no aeration.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/08/20 alle ore 22:39:26