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首页> 外文期刊>The Journal of Applied Poultry Research >Effect of ventilation on distributions, concentrations, and emissions of air pollutants in a manure-belt layer house
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Effect of ventilation on distributions, concentrations, and emissions of air pollutants in a manure-belt layer house

机译：通风对粪肥带状房屋中空气污染物的分布，浓度和排放的影响

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Air pollutants from poultry operations pose a potential threat not only for bird health, but also for the environment outside. Ventilation is believed to be an effective way of regulating house environment. To improve understanding of ventilation effects on house environment, distributions, concentrations and emissions of ammonia, carbon dioxide, total suspended particulates, and particulate matter 2.5 (fine particles with a diameter of 2.5 mu m or less) were investigated in a manure-belt layer house using 9 ventilation stages (VS) with different ventilation rates (VT). Distributions of pollutants were assessed visually using contour plots and coefficient of variation. Emission rates of pollutants were estimated by multiplying VT by concentration. Spatial distributions of 4 pollutants were not homogeneous throughout the house, regardless of VS, and increased VT aggravated the spatial disparity. In the house, pollutant concentrations were controlled under harmful levels during the 9 VS. Ventilation, as expected, can decrease pollutant concentrations. However concentrations of ammonia and carbon dioxide did not decrease proportionately to increased VT. The highest emission rates of 4 pollutants were observed during VS1, a stage with maximum ventilation, which reflected VT as a key factor determining emission rate. The study indicated that it is difficult to balance house environment and control pollutant concentrations depending only on ventilation. Several additional factors, such as temperature, humidity, manure handling, bird management, and ventilation system design, should be comprehensively considered to control air pollutants from poultry operations.
机译：家禽业产生的空气污染物不仅对鸟类健康构成威胁，而且对外部环境也构成潜在威胁。通风被认为是调节房屋环境的有效方法。为了更好地了解通风对房屋环境的影响，对肥料带层中的氨，二氧化碳，总悬浮颗粒和颗粒物2.5（直径为2.5微米或更小的细颗粒）的分布，浓度和排放进行了研究。房屋使用9个通风等级（VS）和不同的通风速率（VT）。使用等高线图和变异系数直观地评估污染物的分布。通过将VT乘以浓度来估算污染物的排放率。不管VS如何，四种污染物的空间分布在整个房屋中都不均匀，而VT的增加加剧了空间差异。在室内，在9 VS期间，污染物浓度被控制在有害水平以下。如预期的那样，通风可以降低污染物的浓度。但是，氨和二氧化碳的浓度并未随VT的增加而成比例地降低。在通风最大的阶段VS1期间，观察到4种污染物的最高排放率，这反映了VT是确定排放率的关键因素。研究表明，仅依靠通风是很难平衡房屋环境和控制污染物浓度的。应该综合考虑其他几个因素，例如温度，湿度，粪便处理，家禽管理和通风系统设计，以控制禽类经营产生的空气污染物。

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