Abstract
The biofiltration technique for the purification of polluted air from volatile compounds was studied. The process was realized in a modified solid-state fermentation system (SSF). The ammonia removal efficiency was investigated in one and two stage systems with inert packing material and hemoautotrofic microorganisms designed DN-1 (Pseudomonas sp.), DN-2 (Nitrisomonas sp.), DN-3 (Nitrobacter sp.) and DN-13 (Sarcina sp.). The investigations were made at different ammonia concentrations in inlet gas and packing loads. A one-stage biofiltration system with the ammonia load 0.41 g/m3h ensured the biological elimination capacity 0.33 g/m3h due to the nitrification processes. A two-stage system increased the total removal efficiency as well as the biodegradation efficiency as the result of the denitrification process
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