Kinetics of organic compound removal from waste gases with a biological filter

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Abstract
To eliminate organic pollutants in waste gases, a biological filter bed technique with a high self-regenerating capacity and a low pressure drop was developed. The bed consists of an appropriate filling material (mainly peat compost) to let microorganisms grow on the solid surface and to supply them with inorganic nutrients. Most organic compounds are oxidized to CO2 and H2O. The compositions of the solid phase and the viable organisms present are such that aging is prevented, as a result of which a relatively high activity can be maintained during a long period of time (years). Experiments were carried out in laboratory-scale columns with composite gas mixtures at varied concentrations and superficial gas velocities. The (macro) kinetics of the elimination processes were studied, which enables the prediction of the elimination capacity of the filter bed.
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