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Characteristics of Airborne Microorganisms in Wastewater Treatment Plant

机译：废水处理厂空气中微生物特征

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Airborne microorganisms in four different units (rack chamber, aeration tank, sludge thickening tank and sludge dewatering facility) in certain wastewater treatment plant in Beijing were chosen as research object and their distribution characteristics were studied. Results showed that the concentrations of heterotrophic bacteria and fungi in different units had significant differences. The aeration tank unit had the highest concentrations of heterotrophic bacteria and fungi, followed by the sludge dewatering facility unit and the rack chamber unit, and the lowest was in sludge thickening tank. The size distributions of the heterotrophic bacteria in the four different units had no significant difference, and the highest proportions of the size distribution were in the stage 2, stage 3, stage 4 and stage 5. While, the size distribution of fungi was different from that of heterotrophic bacteria, and the highest proportions of the size distribution were in the stage 3, stage 4 and stage 5. It was noteworthy that 30%-33% of heterotrophic bacteria and 31%-37% of fungi were carried by particle with a diameter size of 0.65-2.1μm, which could reach the alveolus and thus pose a major threat to human health.
机译：选择在北京某些废水处理厂的四种不同单位（机架室，曝气罐，污泥加厚罐和污泥脱水设施）作为研究对象，研究了它们的分布特征。结果表明，不同单位的异养细菌和真菌的浓度具有显着差异。曝气罐单元具有最高浓度的异养细菌和真菌，其次是污泥脱水设施单元和齿条室单元，最低的是污泥加厚罐。四种不同单元中异养细菌的尺寸分布没有显着差异，并且尺寸分布的最高比例在第2阶段，第3阶段，第4阶段和第5阶段。虽然，真菌的尺寸分布不同杂养细菌的典型细菌的最高比例在第3阶段，第4阶段和第5阶段。值得注意的是，30％-33％的异养细菌和31％-37％的真菌用颗粒携带直径尺寸为0.65-2.1μm，可以到达肺泡，从而对人类健康构成重大威胁。

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