Kinetic Modeling of Endosulfan Degradation by Mixed Bacterial Culture

A consortium of already isolated strains has been applied to degrade endosulfan. These were identified by 16S rRNA technique as Stenotrophomonas maltophilia EN-1, Pseudomonas sp. TAH and Enterobacter sp EN-2. Batch experiments were conducted to access the endosulfan degradation efficiency of consort...

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Bibliographic Details
Published in:Soil & sediment contamination 2021-08, Vol.30 (6), p.757-770
Main Authors: Zaffar, Habiba, Fareed, Anum, Riaz, Sania, Ali, Muhammad, Ahmed, Raza, Rashid, Azhar, Kamran-ui-Hassan Naqvi, Syed, Alam Naqvi, Tatheer
Format: Article
Language:English
Subjects:
Bacteria
bacterial consortium
Biodegradation
Cell culture
Consortia
Degradation
Endosulfan
first order
Incubation period
kinetic modeling
Kinetics
Least squares method
Microbiological strains
rRNA 16S
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Summary:A consortium of already isolated strains has been applied to degrade endosulfan. These were identified by 16S rRNA technique as Stenotrophomonas maltophilia EN-1, Pseudomonas sp. TAH and Enterobacter sp EN-2. Batch experiments were conducted to access the endosulfan degradation efficiency of consortium while using various concentrations of endosulfan (5, 25, 50, 75, 100 mg/L). Maximum degradation of about 85-90% was observed at a concentration of 100 mg/L after 96 hours of incubation while no degradation was observed in untreated ones (without consortium). Cell growth kinetic models were applied to explain the kinetic behaviors of bacterial consortium in batch study. Various kinetic parameters such as 'µ max ' and 'K s ' were determined having values of 0.9 h −1 and 7.9 mg/L respectively, that depicts the faster rate of endosulfan degradation by the selected bacterial consortium. Conversely, first-order kinetics was also well fitted in the experimental data using least squares regression (R 2 ) ranged from 0.09 to 0.95, which indicates that the endosulfan utilization was stimulated by a synergistic interaction of each bacterial strain in the consortium.
ISSN:1532-0383
1549-7887
DOI:10.1080/15320383.2021.1897082