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Titolo:
Comparison of biodegradation kinetic parameters for naphthalene in batch and sand column systems by Pseudomonas putida
Autore:
Park, JH; Zhao, XD; Voice, TC;
Indirizzi:
Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 Engn, E Lansing, MI 48824 USA
Titolo Testata:
ENVIRONMENTAL PROGRESS
fascicolo: 2, volume: 20, anno: 2001,
pagine: 93 - 102
SICI:
0278-4491(200107)20:2<93:COBKPF>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
MASS-TRANSFER; GROWTH-KINETICS; METABOLISM; SOILS; 3-CHLOROBENZOATE; BIOAVAILABILITY; MINERALIZATION; DEGRADATION; CULTURE; ACID;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Park, JH Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 Lansing, MI 48824 USA
Citazione:
J.H. Park et al., "Comparison of biodegradation kinetic parameters for naphthalene in batch and sand column systems by Pseudomonas putida", ENVIRON PR, 20(2), 2001, pp. 93-102

Abstract

Kinetic parameters for the degradation of naphthalene by Pseudomonas putida (ATCC 17484) were estimated in both batch and column assays, in order to evaluate the role of flow, and cell attachment on biodegradation rates. Suspended cells and cells attached to Ottawa sand were used under a variety, of biomass levels, column flow-rates, and substrate concentrations. In batchsystems, degradation followed zero-order kinetics across the entire concentration range, while the columns exhibited decreased rates at concentrations less than 100 (mug/L), describable by Michaelis-Menten kinetics. This is reflected in elevated values of the half-saturation constant, K, in columns. We offer the explanation that this may, have resulted from reactive heterogeneity, within the porous media, imposing a distribution of length-scalesfor transfer of substrate to the cell surfaces. Well-mixed batch systems are expected to have both shorter and more uniform transfer distances. When kinetic parameters obtained in batch system are used for prediction of degradation in columns, at least two factors-exposed reduction of exposed cell surface area and heterogeneity of cell distribution-will likely, reduce overall column degradation rates.

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Documento generato il 22/01/20 alle ore 22:10:27