Cometabolic Degradation of Trichloroethylene by Single- and Two-Phase Systems

The cometabolic degradation of trichloroethylene (TCE) by Pseudomonas putida F1 (strain ATCC 700007) at different concentrations was studied in single- and two-phase systems using 2-undecanone as the second organic phase. Toluene vapors were used as the primary growth substrate for Pseudomonas putid...

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Bibliographic Details
Published in:Soil & sediment contamination 2013, Vol.22 (1), p.85-94
Main Authors: Hamed, Tareq Abu, Bayraktar, Emine, Mehmetoglu, Tanju, Mehmetoglu, Ülkü
Format: Article
Language:English
Subjects:
2-undecanone
Bacteria
Binary systems (materials)
Biodegradation
Biomass
Cometabolic biodegradation
Degradation
Hydrocarbons
microbial biomass
Phase ratio
Pseudomonas putida
Pseudomonas putida F1
Soil contamination
toluene
Trichloroethylene
two-phase system
vapors
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Summary:The cometabolic degradation of trichloroethylene (TCE) by Pseudomonas putida F1 (strain ATCC 700007) at different concentrations was studied in single- and two-phase systems using 2-undecanone as the second organic phase. Toluene vapors were used as the primary growth substrate for Pseudomonas putida F1. The effects of the biomass concentration and the phase ratio on the biodegradation process were investigated. The best biomass concentration and the most suitable phase ratio were found to be 0.462 and 0.025 g/L (vₒᵣg/vₐq), respectively. In the single-phase system, 36.5 mg/L TCE was degraded completely in 15 hours and only 78% of 55 mg/L TCE was degraded in 27 hours, while in the two-phase system 55 mg/L TCE was degraded completely in 14 hours. The use of the two-phase system not only decreased the biodegradation time of TCE but also prevented the inhibition effect of high concentrations of TCE on the microbial biomass.
ISSN:1549-7887
1532-0383
1549-7887
DOI:10.1080/15320383.2012.714422