عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Background and purpose: The use of local ventilation system is one of methods to collect and control of air pollutants in the cramp unit of industrial poultry slaughterhouse and its subsequent is reduction of the effects of air pollutants on human health. The purpose of this study is to survey the effect of design and proper implementation of local ventilation system and the refiner on the control of dust in industrial slaughterhouse poultry.
Materials and methods: This study was conducted in three steps; evaluation of particulate air pollutants before design, design and implementation of local ventilation system and evaluation of local ventilation system. Sampling of respiratory and inhalational particles was done with the use of nylon cyclone and PVC filter according to the NIOSH 0600 method. Then, local ventilation system was designed and implemented according to velocity pressure procedure of the Committee of Industrial Ventilation America. Finally, the efficiency of local ventilation system and the refiner used were evaluated.
Results: The concentration of dust in a ventilation off system for respirable and inhalable particles, was obtained 13/07 and 1/18 mg/m3, respectively. Previous inefficient efficiency to remove respirable and inhalable particles was about 14 and 18 percent, respectively, which design and implementation of local ventilation systems increased the efficiency to more than 83 and 92 percent. Also, the efficiency of used refiner has been 58/26 and 27/52 percent for respirable and inhalable particles.
Conclusion: Findings of the study showed that design and proper implementation of local ventilation systems can have a great effect on reduction of particles in cramp unit. Also, use of the sedimentation chamber refiner has relatively good efficiency for the control of respiratory particles.