Abstract
This paper presents the results of basic investigations on reactions and process engineering in the biological purification of exhaust air in a trickle-bed reactor. The biocatalysts used were pollutant-specific bacterial monocultures, which were immobilized on various carriers. By using different pollutants (e.g. acetone, propionaldehyde, naphthalene and toluence, crude gas concentrations: 5–35 ppm), the effect of the water solubility of the gaseous substances on separation efficiency was studied. Furthermore, a combination of monocultures was used for degradation of a mixture of pollutants. The results show that, with suitable combinations of bacteria, pollutants and carriers, conversions of more than 80% at a space velocity of about 1000-1 can be achieved by this method.
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