The response and factors of microbial aerosol emission from the sludge bio-drying process

Bibliographische Detailangaben
Veröffentlicht in:	Waste management (New York, N.Y.). - 1999. - 175(2024) vom: 01. März, Seite 294-304
1. Verfasser:	Wang, Ying (VerfasserIn)
Weitere Verfasser:	Li, Lin, Ma, Jiawei, Han, Yunping
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Waste management (New York, N.Y.)
Schlagworte:	Journal Article Bioaerosol emissions Biological drying Excess sludge Microbial community Moisture content Sewage Aerosols

Beschreibung
Zusammenfassung:	Copyright © 2024 Elsevier Ltd. All rights reserved. Exposure to high levels of microbial contaminants during waste disposal leads to the development of various diseases, including respiratory symptoms and gastrointestinal infections. In this study, the emissions of airborne bacteria and fungi during the process of sludge bio-drying were investigated. The recorded emission levels of airborne bacteria and fungi were 2398 ± 1307 CFU/m3 and 1963 ± 468 CFU/m3, respectively. Viable bacteria were sized between 1.1 and 3.3 μm, while fungal particles were concentrated between 2.1 and 4.7 μm. High-throughput sequencing was used to conduct a microbial population assay, and correlation analysis was performed to estimate the relationship between key factors and bioaerosol emissions. The main bacteria identified were Bacillus sp., Lysinibacillus sp. YS11, unclassified Enterobacteriaceae, Brevundimonas olei, and Achromobacter sp.; the primary types of fungi were Aspergillus ochraceus, Gibberella intricans, Fusarium concentricum, Aspergillus qinqixianii, and Alternaria sp.; and the dominant opportunistic pathogens were Bacillus anthracis and Aspergillus ochraceus. At lower moisture and temperature levels, airborne bacterial concentrations were higher, especially the release of fine particles. In addition, moisture content had a significant impact on the microbial population in bioaerosols. This study provides insights into strategies for controlling bioaerosols in the exhaust gases of the sludge bio-drying process
Beschreibung:	Date Completed 29.01.2024 Date Revised 29.01.2024 published: Print-Electronic Citation Status MEDLINE
ISSN:	1879-2456
DOI:	10.1016/j.wasman.2024.01.009