title: Biodegradation kinetics of benzene, toluene and xylene compounds: microbial growth and evaluation of models.
abstract: The biodegradation kinetics of BTX compounds (benzene, toluene, and xylene) individually and as mixtures was studied using models with different levels of sophistication. To compare the performance of the unstructured models applied in this work we used experimental data obtained here and some results published in the literature. The system description was based on the material balances of key components for batch operations, where the Monod and Andrews models were applied to predict the biodegradation of individual substrates. To simulate the biodegradation kinetics of substrate mixtures, models of substrate inhibition were applied along with the Sum Kinetics with Interaction Parameters (SKIP) models, where for two-component association toluene-xylene SKIP model presented better performance and for tri-component association benzene-toluene-xylene, the uncompetitive inhibition model was better. The kinetic parameters were estimated via a global search method known as Particle Swarm Optimization (PSO). The main result of this study is that the sophisticated biodegradation kinetics of BTX mixtures can be successfully described by applying the SKIP model, with the main advantage being the consideration of the substrate interactions.
authors: Departamento de Engenharia Química, Laboratório de Transferência de Massa, Universidade Federal de Santa Catarina, PO Box 476, CEP 88, 040-900, Florianópolis, SC, Brazil.
authors: Vódice Amoroz
authors: VA
authors: Feisther
authors: Antônio Augusto
authors: AA
authors: Ulson de Souza
authors: Daniela Estelita Goes
authors: DE
authors: Trigueros
authors: Josiane Maria Muneronde
authors: JM
authors: de Mello
authors: Déborade
authors: D
authors: de Oliveira
authors: Selene M A
authors: SM
authors: Guelli Ulson de Souza
mesh_terms: D001554:Benzene / Q000378:metabolism*; D001673:Biodegradation, Environmental; D007700:Kinetics; D064307:Microbiota; D008956:Models, Chemical; D014050:Toluene / Q000378:metabolism*; D014992:Xylenes / Q000378:metabolism*
chemical_list: D014992:Xylenes; D014050:Toluene; D001554:Benzene