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Bioaerosols emission and exposure risk of a wastewater treatment plant with A~2O treatment process

机译：A〜2O处理工艺的污水处理厂的生物气溶胶排放和暴露风险

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摘要

The characteristics of bioaerosol emissions from wastewater treatment plants (WWTPs) have attracted extensive attention. The anaerobic-anoxic-oxic (A(2)O) process, which uses the activated sludge approach to wastewater treatment, is the most widely used process in WWTPs. Concentration, size distribution, population, and exposure risk from bacteria and fungi in bioaerosols of WWTPs using the A(2)O process were studied in this work. The results showed that the maximum concentration of airborne bacteria (1.00 x 10(4) Colony Forming Units per cubic meter (CFU m(-3))) and fungi (1.44 x 10(4) CFU m(-3)) occurred from the facility's aerobic tank, in summer. As one of the main factors affecting bioaerosol exposure risk, particle size distribution was related to season. The study found that particles larger than 3.3 gm in diameter were detected mainly in spring and summer, while particles less than 3.3 gm were detected mainly in autumn and winter, whether bacterial aerosol or fungal aerosol. In addition, pathogenic bacteria were observed in bioaerosols from WWTPs, with 18 of the 65 species of bacteria detected found to be potentially or opportunistically pathogenic, such as Chryseobacterium, Stenotrophomonas, Alcaligenes, Micrococcus, Pantoea, Enterobacter and Escherichia-Shigella. The presence of these pathogens further increased the exposure risk from bioaerosols. The results of an inhalation risk assessment for airborne bacteria and fungi indicated that potential adverse health risks for adults mainly occurred in spring, summer, and autumn. On this basis, it was concluded that WWTP operators should set up effective bioaerosol controls as soon as possible to protect the health of workers, and of residents near the plant.
机译：废水处理厂（WWTP）排放的生物气溶胶的特性引起了广泛关注。厌氧-缺氧-氧（A（2）O）工艺，采用活性污泥法进行废水处理，是污水处理厂中使用最广泛的工艺。在这项工作中，研究了使用A（2）O工艺对污水处理厂生物气溶胶中细菌和真菌的浓度，大小分布，种群和接触风险。结果表明，空气传播细菌的最大浓度（1.00 x 10（4）CFU m（-3））和真菌（1.44 x 10（4）CFU m（-3））发生于夏季，该设施的有氧水箱。作为影响生物气溶胶暴露风险的主要因素之一，粒径分布与季节有关。研究发现，直径大于3.3克的颗粒主要在春季和夏季被发现，而直径小于3.3克的颗粒主要在秋季和冬季被发现，无论是细菌气溶胶还是真菌气溶胶。此外，在污水处理厂的生物气溶胶中观察到了致病细菌，发现的65种细菌中有18种具有潜在或机会致病性，如金边杆菌，嗜麦芽单胞菌，产碱菌，微球菌，泛菌，肠杆菌和埃希氏菌。这些病原体的存在进一步增加了生物气溶胶的暴露风险。空气中细菌和真菌的吸入风险评估结果表明，成年人的潜在不良健康风险主要发生在春季，夏季和秋季。在此基础上得出结论，污水处理厂的经营者应尽快建立有效的生物气溶胶控制措施，以保护工人和工厂附近居民的健康。

著录项

  • 来源
    《Ecotoxicology and Environmental Safety》 |2019年第3期|161-168|共8页
  • 作者

    Han Yunping; Yang Kaixiong; Yang Tang; Zhang Mengzhu; Li Lin;

  • 作者单位

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|CSD Beijing Water Serv Co Ltd, Beijing 100192, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Airborne bacteria; Airborne fungi; Particle distribution; Microbial population; Exposure risk;

    机译：空气传播的细菌;空气传播的真菌;颗粒分布;微生物种群;接触风险;

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