Abstract
Modelling concepts for biofilters and bioscrubbers are introduced which concern the influence of the gasphase, the fluidphase and the biofilm containing the microorganisms. The verification of the models is done with a testsystem, i.e. a synthetic waste air containing ethanol. The microoganisms used are Saccaromyces cerevisiae. For this system the influence of the hydrodynamics and the concentration of the waste on the reactor performance is shown. For the description of the biokinetics of the ethanol removal in the case of nitrogen limitation, i.e. growth limitation a kinetic model is used which takes into account both the concentration of oxygen and ethanol. Experimental results show these influences. Calculations done with the introduced models demonstrate the influence of the solubility of the waste substance, the mass transfer and the hydrodynamics on the conversion factor and the volume of the biofilter/bioscrubber apparatus.