Recent studies in the area of biological waste air treatment in biotri
ckling filters have addressed fundamental key issues, such as biofilm
architecture, microbiology of the process culture and means to control
accumulation of biomass. The results from these studies have provided
a deeper insight into the fundamental mechanisms involved during biot
rickling filtration. In the coming years, these and future advances sh
ould allow for the design of better reactor controls and the improveme
nt of pollutant removal in these gas phase bioreactors. Ultimately, th
is should lead to a more widespread use of biotrickling filters for ai
r pollution control.