INTERACTIONS BETWEEN BENZENE, TOLUENE AND P-XYLENE (BTX) DURING THEIRBIODEGRADATION

Citation
Ys. Oh et al., INTERACTIONS BETWEEN BENZENE, TOLUENE AND P-XYLENE (BTX) DURING THEIRBIODEGRADATION, Biotechnology and bioengineering, 44(4), 1994, pp. 533-538
Citations number
25
Categorie Soggetti
Biothechnology & Applied Migrobiology
ISSN journal
00063592
Volume
44
Issue
4
Year of publication
1994
Pages
533 - 538
Database
ISI
SICI code
0006-3592(1994)44:4<533:IBBTAP>2.0.ZU;2-H
Abstract
A microbial consortium and Pseudomonas strain (PPO1) were used in stud ying biodegradation of benzene, toluene, and p-xylene under aerobic co nditions. Studies involved removal of each compound individually as we ll as in mixture with the others. Both cultures exhibited a qualitativ ely similar behavior toward each compound. Both the pure culture and t he consortium grew on benzene following Monod kinetics, on toluene fol lowing inhibitory (Andrews) kinetics, whereas neither could grow on p- xylene. Benzene and toluene mixtures were removed under cross-inhibito ry (competitive inhibition) kinetics. In the presence of benzene and/o r toluene, p-xylene was cometabolically utilized by both cultures, but was not completely mineralized. Metabolic intermediates of p-xylene a ccumulated in the medium and were identified. Benzene and toluene were completely mineralized. Cometabolic removal of p-xylene reduced the y ields on both benzene and toluene. Except for cometabolism, kinetic co nstants were determined from data analysis and are compared with value s published recently by other researchers. (C) 1994 John Wiley and Son s, Inc.