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이합모스타파 ( E. Mostafa ),이인복 ( I. -b. Lee ) 한국농공학회 2010 한국농공학회 학술대회초록집 Vol.2010 No.-
Poultry production is increasingly regarded as a source of air pollutants which can be environmentally harmful. The air in animal housing contains gases, odours, dust and micro-organisms. These pollutants could directly attenuate poultry health which has major consequences on productivity. Moreover, they could also have a drastic influence on the general health of the people living close to poultry enterprises and the labourers working inside these enterprises. Generally dust can be considered as one of the most important sources for air contamination in poultry houses, where it may be generated from feed, litter, dried manure, feathers and building materials. According to environment protection laws and the maximum acceptable dust concentration in the workplace, dust concentration inside poultry houses must be controlled to provide adequate air for the labourers and the animals inside these buildings. The aim of this investigation was to find out the effect of diurnal change, different year seasons, and housing style such as cage and aviary system on dust emission and correlate it with animal activity. The results showed that the different parameters have an effect on indoor dust concentration and its emission rate. The total indoor dust concentration in an aviary system isexceed the cage system by 18.76 %. The total dust emission rates were 2917 and 421 μg h-1hen-1 for aviary and cage housing systems respectively. The seasons also showed a significant difference in the dust emission rate and indoor dust concentration in both breeding systems where they are increasing gradually in both breeding systems. This increase of the dust emission rate correlated with the animal activity where it started in the early hours of the day till it reached its maximum in the middle of the day and then it decreased with low animal activity to a minimum emission at midnight.
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