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Original Experimental Approach for Assessing Transport Fuel Stability
Published on: October 21, 2016
Biodegradation kinetics of BTE-OX and MTBE by a diesel-grown biomass
K Acuna-Askar1, M A de la Torre-Torres, M J Guerrero-Munoz
1Laboratorio de Biorremediacion Ambiental, Depto de Microbiologia, Facultad de Medicina, UANL, Madero Pte y Dr Aguirre-Pequeno, Monterrey, NL, Mexico. kaskar@fm.uanl.mx
Abstract:
The biodegradation kinetics of BTE-oX and MTBE, mixed all together in the presence of diesel-grown bioaugmented bacterial populations as high as 885 mg/L VSS, was evaluated. The effect of soil in aqueous samples and the effect of Tergitol NP-10 on substrate biodegradation rates were also evaluated. Biodegradation kinetics was evaluated for 54 h, every 6 h. All BTE-oX chemicals followed a first-order two-phase biodegradation kinetic model, whereas MTBE followed a zero-order removal kinetic model in all samples. BTE-oX removal rates were much higher than those of MTBE in all samples. The presence of soil in aqueous samples retarded BTE-oX and MTBE removal rates. The addition of Tergitol NP-10 to aqueous samples containing soil had a positive effect on substrate removal rate in all samples. Substrate percent removals ranged between 64.8-98.9% for benzene, toluene and ethylbenzene. O-xylene and MTBE percent removals ranged between 18.7-40.8% and 7.2-10.3%, respectively.
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