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Titolo:
KINETIC MODELING OF CONTINUOUS PRODUCTION OF ETHANOL FROM CHEESE WHEY
Autore:
GHALY AE; ELTAWEEL AA;
Indirizzi:
TECH UNIV NOVA SCOTIA,DEPT AGR ENGN,POB 1000 HALIFAX NS B3J 2X4 CANADA
Titolo Testata:
Biomass & bioenergy
fascicolo: 6, volume: 12, anno: 1997,
pagine: 461 - 472
SICI:
0961-9534(1997)12:6<461:KMOCPO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SACCHAROMYCES-CEREVISIAE; ALCOHOL PRODUCTION; CANDIDA-SHEHATAE; FERMENTATION; YEAST; INHIBITION; BIOREACTOR; XYLOSE; PERFORMANCE; AERATION;
Keywords:
KINETICS; CONTINUOUS FERMENTATION; ETHANOL; CHEESE WHEY; INHIBITION; CELL GROWTH; SUBSTRATE; LACTOSE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
A.E. Ghaly e A.A. Eltaweel, "KINETIC MODELING OF CONTINUOUS PRODUCTION OF ETHANOL FROM CHEESE WHEY", Biomass & bioenergy, 12(6), 1997, pp. 461-472

Abstract

A kinetic model for continuous fermentation of ethanol from cheese whey was developed. The model accounts for substrate limitation, substrate inhibition, ethanol inhibition and cell death. Three bioreactors of5 L volume each were operated at different hydraulic retention times (HRT) ranging from 18 to 42 h and initial lactose concentrations ranging from 50 to 150 g/L. The experimental data were used to validate themodel. The model predicted the cell, lactose and ethanol concentrations with high accuracy (R' = 0.96-0.99). The cell concentration, lactose utilization and ethanol production were significantly affected by hydraulic retention time and initial substrate concentration. Lactose utilizations of 98, 91 and 83% were obtained with 50, 100 and 150 g/L initial lactose concentrations at 42 h HRT. The highest cell concentration (5.5 g/L), highest ethanol concentration (58.0 g/L) and maximum ethanol yield (99.6% of theoretical) were achieved at 42 h HRT and 150 g/L initial lactose concentration. (C) 1997 Published by Elsevier Science Ltd.

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Documento generato il 09/07/20 alle ore 22:41:05