Assessment of microbiological indoor air quality in an Italian office building equipped with an HVAC system
Assessment of microbiological indoor air quality in an Italian office building equipped with an HVAC system
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DOI：
10.1007/s10661-009-0761-8
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发表时间：
2010-02-01
影响因子：
3
通讯作者：
Carraro, E.
中科院分区：
文献类型：
--
作者：
Bonetta, Sa.;Bonetta, Si.;Carraro, E.
本研究的目的是评估一栋配备供暖、通风和空调 (HVAC) 系统的意大利办公楼室内空气中细菌和真菌的水平和成分。在不同季节在三个开放空间办公室收集空气传播的细菌和真菌。利用室外空气、送风散流器、风机盘管气流和空气处理单元加湿水箱中的微生物水平来评估HVAC系统对室内空气质量（IAQ）的影响。室内空气中发现中低水平的细菌污染（50-500 CFU/m(3)）。葡萄球菌和微球菌是最常见的属，可能是由于人类的存在。由于冬季发生洪水，测得真菌浓度较高。真菌属的室内季节性分布与室外真菌分布有关。研究发现空气中的微生物存在显着的季节性和每日变化，强调了与暖通空调系统开关频率的关系。该监测结果凸显了暖通空调系统对 IAQ 的作用，有助于更好地表征办公楼室内空气中的细菌和真菌种群。
The purpose of this study was to evaluate the level and composition of bacteria and fungi in the indoor air of an Italian office building equipped with a heating, ventilation and air conditioning (HVAC) system. Airborne bacteria and fungi were collected in three open-space offices during different seasons. The microbial levels in the outdoor air, supply air diffusers, fan coil air flow and air treatment unit humidification water tank were used to evaluate the influence of the HVAC system on indoor air quality (IAQ). A medium-low level of bacterial contamination (50-500 CFU/m(3)) was found in indoor air. Staphylococcus and Micrococcus were the most commonly found genera, probably due to human presence. A high fungal concentration was measured due to a flood that occurred during the winter. The indoor seasonal distribution of fungal genera was related to the fungal outdoor distribution. Significant seasonal and daily variation in airborne microorganisms was found, underlining a relationship with the frequency of HVAC system switching on/off. The results of this monitoring highlight the role of the HVAC system on IAQ and could be useful to better characterise bacterial and fungal population in the indoor air of office buildings.