Journal
BIODEGRADATION
Volume 12, Issue 6, Pages 465-475Publisher
SPRINGER
DOI: 10.1023/A:1015012913426
Keywords
BTX; intermediates; kinetics; modeling; Pseudomonas putida F1; substrate interactions
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A two-step model is developed for the aerobic biodegradation of benzene, toluene, and p-xylene (BTX) by Pseudomonas putida F1. The model contains three unique features. First, an initial dioxygenation step transforms BTX into their catechol intermediates, but does not support biomass growth. Second, the benzene or toluene intermediates are mineralized, which supports biomass synthesis. Third, BTX exhibit competitive inhibition on each other's transformation, while toluene and benzene noncompetitively inhibit the mineralization of their catechol intermediate. A suite of batch and chemostat experiments is used to systematically measure the kinetic parameters for the two-step transformations and the substrate interactions.
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