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MEASUREMENT OF AMMONIA EMISSIONS FROM MECHANICALLY VENTILATED POULTRY HOUSES USING MULTIPATH TUNABLE DIODE LASER SPECTROSCOPY
THOMA, E. D., R. C. SHORES, D. BRUCE HARRIS, D. NATSCHKE, R. HASHMONAY, K. D. CASEY, AND R. S. GATES. MEASUREMENT OF AMMONIA EMISSIONS FROM MECHANICALLY VENTILATED POULTRY HOUSES USING MULTIPATH TUNABLE DIODE LASER SPECTROSCOPY. Presented at A&WMA's 98th Annual Conference & Exhibition, Minneapolis, MN, June 21 - 24, 2005.
To inform the public.
Ammonia emissions from mechanically ventilated poultry operations are an important environmental concern. Open Path Tunable Diode Laser Absorption Spectroscopy has emerged as a robust real-time method for gas phase measurement of ammonia concentrations in agricultural settings. This paper presents novel configurations of multipath (OP-TDLAS) that allow near simultaneous measurement of poultry house inlet and exhaust ammonia concentrations. The instrument and its deployment strategy are described and two example applications are presented. In the first case example, an ammonia emission rate from a 25,000-bird tunnel ventilated broiler grow-out house is discussed. From the several hour observation period, an ammonia emission rate of 1.6 g/bird-day was determined for this house. In the second example ammonia emissions from a 106,000-bird high-rise layer house were investigated. This house type produced an ammonia emission rate of 1.3 g/bird-day over the multi-hour observation period.