Simultaneous Degradation of Trichloroethylene and Toluene by Burkholderia cepacia G4 and the Effect of Biotransformation on Bacterial Density. Issue 7 (6th November 2013)

• Record Type: Journal Article
• Authors: Hamid, Shanawar; Amin, Muhammad Tahir; Alazba, Abdulrahman Ali; Manzoor, Umair
• Is Part Of: Clean. Volume 42:Issue 7(2014:Jul.)
• Page Start: 998
• Page End: 1003
• Publication Date: 2013-11-06
• Subjects: Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201300201
• Languages: English
• ISSNs: 1863-0650

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="clen201300201-sec-0001" sec-type="section"> <p>The effect of biomass density, effect of different ratios of trichloroethylene (TCE) and toluene on biomass, and strategies to cope with problems using acclimated <italic>Burkholderia cepacia</italic> G4 were investigated. Complete degradation of TCE was achieved when <italic>B. cepacia</italic> G4 was exposed to 0.5 mg/L TCE and 10 mg/L toluene after starvation of 100 h. Overall results of this study show that degradation rates of toluene decreased as TCE concentration increased. On the contrary, degradation rates of TCE increased up to 10 mg/L TCE and then decreased. Transformation capacity of <italic>B. cepacia</italic> G4 increased as toluene concentration increased but transformation yield decreased showing that excessive substrate supply may not help to improve specific performance parameters. Results of these experiments bear that instead of simultaneous injection of TCE and substrate, the supply of substrate in pulses can increase the efficiency of <italic>B. cepacia</italic> G4 or similar bacterial strains.</p> </sec> </abstract>