Purpose

The concentration and distribution characteristics of airborne bacteria and fungi were assessed at municipal solid-waste processing and disposal facilities (SWPDFs) of Tehran (Arad Kouh Site).

Methods

Air samples were obtained from the indoor air of a laboratory and refectory as well as from the air surrounding a conveyor belt, rotary screen, and bailer. Sampling was conducted according to the standard procedure to determine two bacterial species (Klebsiella spp. and Staphylococcus aureus), total bacteria and fungi, and Aspergillus fumigates.

Results

The maximum concentration of Staphylococcus aureus was in the air surrounding the conveyer belt with the average of 993.2 CFU/m³. The highest concentrations of total fungi (4958.8 CFU/m³) and Aspergillus fumigates (2114 CFU/m³) were measured in the air surrounding the rotary screen. The mean concentrations of bacterial bioaerosols in a more contaminated sampling location in summer and winter were 1687.6 and 1479.4 CFU/m³, respectively.

Conclusions

There were significant differences between the concentration of bioaerosols in cold and warm seasons. The concentrations of bioaerosols in the air surrounding the rotary screen and conveyer belt were significantly more than those in other sampling locations, but were within the recommended maximum of 10³ and 10⁴ CFU/m³.

中文翻译：

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德黑兰城市固体废物处理设施中细菌和真菌生物气溶胶的测定

目的

在德黑兰（Arad Kouh 站点）的城市固体废物处理和处置设施 (SWPDF) 中评估了空气中细菌和真菌的浓度和分布特征。

方法

空气样本取自实验室和食堂的室内空气，以及传送带、旋转筛和料斗周围的空气。根据标准程序进行取样以确定两种细菌种类（克雷伯氏菌属和金黄色葡萄球菌）、总细菌和真菌以及烟曲霉。

结果

金黄色葡萄球菌的最高浓度在输送带周围的空气中，平均为993.2 CFU/m ³。在旋转筛周围的空气中测量到最高浓度的总真菌 (4958.8 CFU/m ³ ) 和烟曲霉(2114 CFU/m ^{3 )。}夏季和冬季污染较重的采样点的细菌生物气溶胶平均浓度分别为 1687.6 和 1479.4 CFU/m ³。

结论

冷暖季节生物气溶胶浓度存在显着差异。旋转筛网和传送带周围空气中的生物气溶胶浓度明显高于其他采样点，但均在建议的最大值 10 ³和 10 ⁴ CFU/m ³之内。