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A bioscrubber for cleaning exhaust air was used in a building housing 30,000 broilers. The bioscrubber system was enhanced to perform at a higher level of efficiency to reduce emissions in consideration of the huge amounts of airflow in poultry production. With regard to pressure, one synthetic filter bank was deployed in a first step. The structure of the filter bank allows a high air flow rate with a low back pressure.

The investigation indicated low ammonia concentrations of the treated gas, less than 5 ppm NH3. The efficiency of reduction for ammonia was 78% and for suspended dust, 45%. The system has to be further developed by providing lower pH values in the washing water for ammonia reduction and by the addition of supplementary equipment for the reduction of suspended dust.