Estimation of Biodegradation Potential of Xenobiotic Organic Chemicals
AUTOR(ES)
Larson, Robert J.
RESUMO
A method is described to estimate the biodegradation potential of soluble, insoluble, and unknown organic chemicals. The method consists of two stages: (i) generation of a microbial inoculum in a bench scale semicontinuous activated sludge system during which microorganisms are acclimated to test material and the removal of dissolved organic carbon is monitored and (ii) biodegradability testing (CO2 evolution) in a defined minimal medium containing the test material as the sole carbon and energy source and a dilute bacterial inoculum obtained from the supernatant of homogenized activated sludge generated in the semicontinuous activated sludge system. Removal and biodegradation are measured using nonspecific methods, at initial concentrations of 5 to 10 mg of dissolved organic carbon per liter. Biodegradability data are accurately described by a nonlinear computer model which allows the rate and extent of biodegradation for different compounds to be compared and statistically examined. The evaluation of data generated in the combined removability-biodegradability system allows the biodegradation potential of a variety of xenobiotic organic chemicals to be estimated.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=291261Documentos Relacionados
- Survey of the Anaerobic Biodegradation Potential of Organic Chemicals in Digesting Sludge
- Effect of Concentration of Organic Chemicals on Their Biodegradation by Natural Microbial Communities
- Effects of microbial community interactions on transformation rates of xenobiotic chemicals.
- Biodegradation of halogenated organic compounds.
- Activity of synchronized cells of a steady-state biofilm recirculated reactor during xenobiotic biodegradation.