A model and reactor for the cometabolic biodegradation of chlorinated organics
- Univ. of California, Berkeley, CA (United States)
The oxidization of chlorinated organics by oxygenase expressing organisms is described by a newly developed kinetic model. The kinetics of the cometabolic oxidation of chlorinated organics have been shown to be affected by product toxicity and/or the depletion of reducing energy. In addition, competition between growth substrate and cometabolic substrate for oxygenase enzymes may significantly influence cometabolic degradation rates. In this study, a modification of Michaelis-Menten/Monod kinetics is proposed that incorporates the effects of product toxicity, reducing energy limitation and competitive inhibition, together with cell growth and decay. This model is able to predict the kinetics of chlorinated organic degradation by resting cells of methane, propane, toluene and phenol oxidizing cultures as well as by methane oxidizers under a range of substrate conditions (resting cells, cells with reducing energy substrate, cells with growth substrate). The proposed model is then used together with experimental data to assess the feasibility of bioreactor systems for the treatment of chlorinated organic waste streams.
- OSTI ID:
- 210545
- Report Number(s):
- CONF-9509139--
- Country of Publication:
- United States
- Language:
- English
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