住宅新风系统过滤器内微生物污染水平与影响因素
Microbial contamination levels and influencing factors in filters for residential outdoor air systems
摘要：
选取寒冷地区不同居住建筑的4个新风系统,对其粗效、中效、高中效过滤器内的细菌和真菌污染水平进行了检测,分析了温湿度、空气质量指数(AQI)对过滤器内细菌和真菌浓度的影响,对室外微生物浓度与空气中污染因子建立了回归模型。结果显示:粗效过滤器内微生物浓度范围为104～1010CFU/m3;中效和高中效过滤器内细菌浓度范围为102～107CFU/m3,真菌浓度范围为10-1～106CFU/m3;过滤器内微生物浓度与温湿度、空气质量指数呈正相关性;室外微生物浓度与NO2、O3、SO2浓度均呈正相关性,O3浓度影响最大;被测试过滤器中主要存在的真菌有曲霉属、青霉属等。
Abstract：
In this paper, four outdoor air systems of different residential buildings in cold zone are selected to detect the bacterial and fungal contamination levels in their primary, medium, and high and medium efficiency filters. The effects of temperature, humidity, and air quality index (AQI) on the bacterial and fungal concentration in the filters are analysed. A regression model is established between outdoor microbial concentrations and air pollution factors. The results show that the microbial concentration in the primary efficiency filter ranges from 104to 1010CFU/m3. The bacterial concentration in the medium and high and medium efficiency filters ranges from 102to 107CFU/m3, and the fungal concentration ranges from 10-1to 106CFU/m3. The microbial concentration in the filters is positively correlated with temperature, humidity, and air quality index. The outdoor microbial concentration is positively correlated with the concentrations of NO2, O3, and SO2, and the impact of O3concentration is the greatest. The main fungi existing in the tested filter includeAspergillus,Penicillium, etc.
Keywords:outdoor air system; filter; microbial contamination; bacterium; fungus; concentration; air quality index; influencing factor