The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant

文献类型： 外文期刊

第一作者： Gao, Min

作者： Gao, Min;Yang, Ziye;Guo, Yajie;Chen, Mo;Qiu, Tianlei;Wang, Xuming;Yang, Ziye;Sun, Xingbin

作者机构：

关键词： Size distribution; Airborne bacteria; Biological diversity; Human pathogenic bacteria; Composting plants

期刊名称：FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING （ 影响因子：4.357； 五年影响因子：3.688 ）

ISSN： 2095-2201

年卷期： 2021 年 15 卷 3 期

页码：

收录情况： SCI

摘要： Composting plants are regarded as one of the important sources of environmental bioaerosols. However, limitations in the size distribution of airborne bacteria have prevented our comprehensive understanding of their risk to human health and their dispersal behavior. In this study, different sizes of airborne bacteria were collected using an eight-stage impactor from a full-scale composting facility. Size-related abundance and communities of airborne bacteria as well as human pathogenic bacteria (HPB) were investigated using 16S rRNA gene sequencing coupled with droplet digital PCR. Our results indicate that the bacterial concentrations from the eight stages were approximately 10(4)-10(5) copies/m(3). Although no statistical correlation was detected between the particle size and the Shannon index, the influence of size on bacterial lineages was observed in both composting and packaging areas. For airborne bacteria from different stages, the dominant phyla were Firmicutes, Proteobacteria, and Actinobacteria, and the dominant genera was Bacillus. Seven out of eight HPB with a small geometric mean aerodynamic diameter had a high concentration in composting areas. Based on diameters of 2.42 to 5.09 mu m, most HPB in the composting areas were expected to be deposited on the bronchus and secondary bronchus. However, in the packaging areas, the deposition of HPB (diameters 3.70 to 8.96 mu m) occurred in the upper part of the respiratory tract. Our results on the size distribution, abundance, and diversity of these bacteria offer important information for the systematic evaluation of bacterial pathogenicity and the potential health impacts on workers in composting plants and the surrounding residents. (c) Higher Education Press 2020

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序