Modeling of the cometabolic biodegradation of trichloroethylene by toluene-oxidizing bacteria in a biofilm system

Article Abstract:

A mixed culture of toluene-oxidizing bacteria was active in the cometabolic degradation of trichloroethylene (TCE), but it appears the culture was not as effective as using the methanotroph M. trichosporium. The mixed culture used contained only two strains of bacteria that were capable of effecting TCE degradation. Additionally, while TCE did not appear to have a harmful effect on the ability of the mixed culture to remove TCE, it was unclear whether the mixed culture could maintain stability over a long time period.

Research, Trichloroethylene

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Humic substance formation via the oxidative weathering of coal

Article Abstract:

Humic substance producing coal oxidation reactions are found to produce carbon dioxide at 24 degrees centigrade and insoluble organic oxidation products at proportions of 30%-50% and 50%-70% respectively. A longer contact time, such as that in natural conditions, is expected to produce a larger proportion of insoluble organic substances. Computations show that carbonyl groups have marked increases at 50 degrees centigrade with dissolution and oxygen consumption rates accelerated by increases in pH.

Research and Development in the Physical, Engineering, and Life Sciences, Ecological Sciences, Bituminous Coal and Lignite Mining, Coal, Coal Mining, Environmental aspects, Environmental sciences, Oxidation-reduction reaction, Oxidation-reduction reactions

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Model for the cometabolic biodegradation of chlorinated organics

Article Abstract:

A mechanistic model describing the kinetics of cometabolic biodegradation of chlorinated organics is developed. The model shows that chlorinated organics reduces cell activity and conditions cometabolic degradation rates. The kinetics of chlorinated organic degradation are explained through different substrate conditions including resting cells, cells with reducing energy substrate and cells with growth substrate.

Organic compounds, Chlorine compounds

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