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Titolo:
CONTINUOUS ETHANOL-PRODUCTION FROM CHEESE WHEY FERMENTATION BY CANDIDA-PSEUDOTROPICALIS
Autore:
GHALY AE; ELTAWEEL AA;
Indirizzi:
TECH UNIV NOVA SCOTIA,DEPT AGR ENGN,POB 1000 HALIFAX NS B3J 2X4 CANADA
Titolo Testata:
Energy sources
fascicolo: 10, volume: 19, anno: 1997,
pagine: 1043 - 1063
SICI:
0090-8312(1997)19:10<1043:CEFCWF>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALCOHOL PRODUCTION; SACCHAROMYCES-CEREVISIAE; XYLOSE; BATCH; YEAST; PERFORMANCE; HYDROLYSATE; AERATION; SHEHATAE; SYSTEMS;
Keywords:
CELL GROWTH; CHEESE WHEY; CONTINUOUS FERMENTATION; ETHANOL; INHIBITION; MICROAERATION; SUBSTRATE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
A.E. Ghaly e A.A. Eltaweel, "CONTINUOUS ETHANOL-PRODUCTION FROM CHEESE WHEY FERMENTATION BY CANDIDA-PSEUDOTROPICALIS", Energy sources, 19(10), 1997, pp. 1043-1063

Abstract

Three pilot-scale continuous mix reactors of 5-L volume each were used to study the effect of retention time (18-42 hours) and initial substrate concentration (50-150 g/L) on the cell yield, lactose consumption, and maximum ethanol concentration during continuous fermentation ofcheese whey using the yeast Candida psuedotropicalis. A microaerationrate of 480 mL/min and a nutrient supplement (yeast extract) concentration of 0.1% vol/vol were used. The results indicated that the dissolved oxygen concentration, temperature, cell concentration, lactose utilization rate, and ethanol concentration were affected by hydraulic retention time and initial substrate concentration. The highest cell concentration of 5.46 g/L and the highest ethanol concentration of 57.96 g/L (with a maximum ethanol yield of 99.6% from the theoretical yield)were achieved at the 42-hour hydraulic retention time and the 150 g/Linitial substrate concentration, whereas the highest cell yield was observed at the 50 g/L initial substrate concentration and the 36-hour hydraulic retention time. Lactose utilizations of 98, 91, and 83% wereobtained with 50, 100, and 150 g/L initial substrate concentrations at the 42-hour hydraulic retention time. A pH control system was found unnecessary.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 13:48:04