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.
Biodegradation kinetics of BTE-OX and MTBE by a diesel-grown biomass
K. Acuna-Askar, M.A. de la Torre-Torres, M.J. Guerrero-Munoz, M.T. Garza-Gonzalez, B. Chavez-Gomez, I.P. Rodriguez-Sanchez, H.A. Barrera-Saldana; Biodegradation kinetics of BTE-OX and MTBE by a diesel-grown biomass. Water Sci Technol 1 May 2006; 53 (11): 197–204. doi: https://doi.org/10.2166/wst.2006.353
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