Mariano, Adriano Pinto [UNESP]Tomasella, Richard Clayton [UNESP]De Oliveira, Luciano Marcondes [UNESP]Contiero, Jonas [UNESP]De Angelis, Dejanira de Franceschi [UNESP]2014-05-272014-05-272008-05-02African Journal of Biotechnology, v. 7, n. 9, p. 1323-1328, 2008.1684-5315http://hdl.handle.net/11449/70409The biodegradability of pure diesel and biodiesel and blends with different proportions of biodiesel (2% (commercial); 5% and 20%) was evaluated employing the respirometric method and the redox indicator 2,6-dichlorophenol indophenol (DCPIP) test. In the former, experiments simulating the contamination of natural environments (soil from a petrol station or water from a river) were carried out in Bartha biometer flasks (250 ml), and used to measure the microbial CO 2 production. With the DCPIP test, the capability of three inocula to biodegrade the blends was tested. Results show that although biodiesel is more easily and faster biodegraded than diesel oil, among the blends evaluated (2%, 5% and 20%), only the blend with higher concentration of biodiesel presented biodegradability significantly different from diesel and it was not verified an improvement on the biodegradation of the diesel by means of co-metabolism. © 2008 Academic Journals.1323-1328engBiodegradabilityBiodieselBioremediationBlendDiesel2,6 dichlorophenolindophenolbiodieselbiofuelcarbon dioxidediesel fuelgasolinebiodegradabilitybiofuel productionBrazilcontrolled studynonhumanoxidation reduction reactionrespirometryriver ecosystemsoil pollutionwater samplingArtigo10.4314%2Fajb.v7i9.58669Acesso aberto2-s2.0-434491109472-s2.0-43449110947.pdf9859154979447005