Caracterização da concentração de amônia em sistemas de instalações semi-climatizada por pressão negativa e positiva para frangos de corte em condições de inverno.

Abstract

The gases normally found inside of poultry facilities are NH3, C02 and CO. NH3 is pointed as the main gas that can causes negative effects in birds and workers, being, therefore, the one that needs to be controlled more effectively.. This work aimed to diagnostic the air quality (ammonia concentration) in broilers facilities with two different ventilation systems, negative pressure tunnel ventilation system and positive pressure ventilation system, in winter conditions, in the Souther part of Brazil. The experiment was developed between July and September, 2004, in commercial Poultry Facilities, from Perdigão agroindustrial company, in the city of Videira, west of Santa Catarina State. With the purpose of characterizing the air inside the facilities, measurements of concentrations of ammonia were accomplished, in ppm, at the levei of the birds (0,30 m). The largest gaseous concentrations of NH3 were detected in the period of the moming for the two treatments carried out. Most of time the NH3 concentration leveis was above the ideal limit for the good development of the birds.