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Simultaneous Phenol Degradation and Chromium(VI) Reduction in an Anaerobic Fixed-Biofilm Process

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A mathematical model system was developed to describe simultaneous removal of phenol and chromium (VI) in an anaerobic fixed biofilm reactor. The model system incorporates the mechanisms of diffusive mass transport and double Monod kinetics. The model was solved using a combination of orthogonal collocation method and Gear's method. A laboratory-scale column reactor was conducted to verify the model system. Batch kinetic tests were conducted independently to determine the biokinetic parameters used in the model system. The removal efficiencies for phenol and chromium (VI) were approximately 98% and 91%, respectively, at a steady-state condition. The experimental results are in agreement with model simulations. The experimental and model approaches presented in this study could be used to design pilot-scale or full-scale anaerobic fixed-biofilm reactor to remove phenol and chromium (VI) simultaneously in industrial wastewater.
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Keywords: Phenol degradation; biofilm reactor; chromium reduction; model system

Document Type: Research Article

Publication date: 2009-01-01

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