ABSTRACT
In situ activity, distribution, and stability of nitrifying and heterotrophic processes were investigated under various air load and water management strategies in a full-scale biotrickling filter designed for the degradation of NH3 and odorous organic compounds in the ventilation air from a pig facility. The filter biofilm was examined through a broad in situ approach combining microscale profiling of O2 and pH by electrochemical sensors, fluorescence in situ hybridization (FISH), calculation of NH3 and NO2
− conversion rates based on air and water analysis, and batch incubation measurements of NH3 oxidation capacities.
