Modeling of atmospheric ammonia gas from livestock farms with AERMOD

Öz

Ammonia (NH3) emissions play a very important role in the formation of PM2.5 in the atmosphere, which can have significant effects on human health and the environment. In this study, hourly and daily dispersions of NH3 gas for the dairy were modeled by using the NH3 gas emission values emitted from the dairy facility. The emitted NH3 gas from the operation has been modeled using AERMOD (The American Meteorological Society/Environmental Protection Agency Regulatory Model). AERMOD is an USEPA-approved air quality dispersion model employed to determine the impact of air pollutants released from industrial areas as well as livestock facilities. The study area is a commercial dairy farm with approximately 2200 head of animals. As a result of modeling, the hourly immission has been estimated to be approximately 19 µg/m3 and the daily NH3 gas immission has been also estimated to be approximately 4 µg/m3 from the dairy to the nearest residential area. It has been determined that these estimated values are well below both the American and European air quality standards.

Anahtar Kelimeler

• Livestock
• ammonia
• AERMOD

Hayvancılık işletmelerinde atmosferik amonyak gazının AERMOD ile modellenmesi

Öz

Amonyak (NH3) emisyonları, atmosferde insan sağlığı ve çevre üzerinde önemli etkileri olabilecek PM2.5 oluşumunda çok önemli bir rol oynamaktadır. Bu çalışmada, daha önce bir süt sığırcılığı tesisinden atmosfere yayılan NH3 gazı emisyon değerleri kullanılarak, işletme için NH3 gazının saatlik ve günlük dağılımları modellenmiştir. İşletmeden salınan NH3 gazı AERMOD (The American Meteorological Society/Environmental Protection Agency Regulatory Model) ile modellenmiştir. AERMOD günümüzde endüstriyel alanlarla birlikte hayvancılık tesislerinden salınan hava kirleticilerinin etkilerini belirlemek için kullanılan USEPA onaylı bir hava kalitesi dağılım modelidir. Çalışma alanı, yaklaşık 2200 baş hayvana sahip ticari bir süt sığırı işletmesidir. Modelleme sonucunda, işletmeden en yakın yerleşim alanına olan saatlik NH3 imisyon yükü yaklaşık 19 µg/m3 ve günlük NH3 gazı imisyon etkisi yaklaşık 4 µg/m3 olarak tahmin edilmiştir. Bu değerlerin hem Amerikan ve hem de Avrupa hava kalitesi yasal sınır değerlerinin oldukça altında kaldığı tespit edilmiştir.

Anahtar Kelimeler

• Hayvancılık tesisi
• amonyak
• AERMOD

Kaynakça

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