TY - JOUR
T1 - Degradation kinetics of phenol by immobilized cells of Candida tropicalis in a fluidized bed reactor
AU - Juárez-Ramírez, C.
AU - Ruiz-Ordaz, N.
AU - Cristiani-Urbina, E.
AU - Galíndez-Mayer, J.
N1 - Funding Information:
C.J.-R., N.R.-O., E.C.-U. and J.G.-M. are fellow holders of a grant from the Comisión de Operación y Fomento de Actividades Académicas, Instituto Politéc-nico Nacional, Mexico City, Mexico. The authors gratefully acknowledge the financial support provided by the National Council for Science and Technology (CONACyT), Mexico.
PY - 2001
Y1 - 2001
N2 - Degradation kinetics of phenol by free and agar-entrapped cells of Candida tropicalis was studied in batch cultures. The initial phenol degradation rate achieved with free cells was higher than that obtained with immobilized cells, when phenol concentrations up to 1000 mg l-1 were used. However, at higher phenol concentrations, the behaviour was quite different. The initial degradation rate of the immobilized yeast cells was about 10 times higher than that of the free cells, at a phenol concentration of 3500 mg l-1. The semicontinuous and continuous degradation of phenol by immobilized yeast cells was also investigated in a multi-stage fluidized bed reactor. The highest phenol removal efficiencies and degradation rates as well as the lowest values of residual phenol and chemical oxygen demand were obtained in the semicontinuous culture when phenol concentrations up to 1560 mg l-1 were used.
AB - Degradation kinetics of phenol by free and agar-entrapped cells of Candida tropicalis was studied in batch cultures. The initial phenol degradation rate achieved with free cells was higher than that obtained with immobilized cells, when phenol concentrations up to 1000 mg l-1 were used. However, at higher phenol concentrations, the behaviour was quite different. The initial degradation rate of the immobilized yeast cells was about 10 times higher than that of the free cells, at a phenol concentration of 3500 mg l-1. The semicontinuous and continuous degradation of phenol by immobilized yeast cells was also investigated in a multi-stage fluidized bed reactor. The highest phenol removal efficiencies and degradation rates as well as the lowest values of residual phenol and chemical oxygen demand were obtained in the semicontinuous culture when phenol concentrations up to 1560 mg l-1 were used.
KW - Candida tropicalis
KW - Fluidized bed reactor
KW - Immobilized cells
KW - Phenol biodegradation
UR - http://www.scopus.com/inward/record.url?scp=0035210565&partnerID=8YFLogxK
U2 - 10.1023/A:1012979100827
DO - 10.1023/A:1012979100827
M3 - Artículo
SN - 0959-3993
VL - 17
SP - 697
EP - 705
JO - World Journal of Microbiology and Biotechnology
JF - World Journal of Microbiology and Biotechnology
IS - 7
ER -