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Real time detection and characterisation of bioaerosol emissions from wastewater treatment plants.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-02-29 , DOI: 10.1016/j.scitotenv.2020.137629 Jiang-Han Tian 1 , Cheng Yan 2 , Zaheer Ahmad Nasir 1 , Sonia Garcia Alcega 3 , Sean Tyrrel 1 , Frederic Coulon 1
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-02-29 , DOI: 10.1016/j.scitotenv.2020.137629 Jiang-Han Tian 1 , Cheng Yan 2 , Zaheer Ahmad Nasir 1 , Sonia Garcia Alcega 3 , Sean Tyrrel 1 , Frederic Coulon 1
Affiliation
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Bioaerosol emissions from wastewater treatment plants may pose adverse health impact on workers and nearby communities. To detect and characterise bioaerosol emissions from wastewater treatment plant (WWTP), a novel real-time bioaerosol sensor, Spectral Intensity Bioaerosol Sensor (SIBS) was employed at a WWTP and a background site. The SIBS records a range of data (size, shape, and fluorescence emission across 16 wavelength bands from 298 to 735 nm for two excitation wavelengths (285 nm and 370 nm)) on single particles in real time. Additionally, excitation-emission matrix (EEM) of wastewater samples obtained by a spectrofluorometer was compared with SIBS spectra from WWTP. The results showed that the average number concentrations of total particles (NT) and fluorescence particles (NF) were both higher at the WWTP (NT = 2.01 cm-3, NF = 1.13 cm-3) than the background site (NT = 1.79 cm-3, NF = 1.01 cm-3). The temporal variation of NF and NT was highly variable at the WWTP and the concentration peaks were consistent with on-site activities. Moreover, the time-resolved number-size distribution of fluorescent particles revealed the predominance of fine scale particles (<1 μm) and the time-series channel by channel number concentrations demonstrated the temporal variability of dominant bio-fluorophores. Furthermore, the overall and size-segregated fluorescence spectra at two sites were multimodal. In particular, the fluorescence intensity increases with increasing particle size in WWTP spectra, which is not present in the background spectra. In addition, the highly resolved SIBS fluorescence spectra were broadly similar to EEM of wastewater. These findings confirmed that the spectrally resolved fluorescence detected by SIBS is capable of providing reliable bio-fluorophores information of bioaerosol emissions generated from wastewater, thus holding the potential for better characterisation of bioaerosols in real time.
中文翻译：
实时检测和表征废水处理厂中生物气溶胶的排放。
废水处理厂的生物气溶胶排放可能对工人和附近社区造成不利的健康影响。为了检测和表征废水处理厂（WWTP）的生物气溶胶排放，在污水处理厂和背景工地采用了一种新型的实时生物气溶胶传感器，即光谱强度生物气溶胶传感器（SIBS）。SIBS实时记录单个粒子的一系列数据（两个激发波长（285 nm和370 nm）在298至735 nm的16个波长带上的大小，形状和荧光发射）。此外，将通过分光荧光计获得的废水样品的激发发射矩阵（EEM）与WWTP的SIBS光谱进行了比较。结果表明，污水处理厂的总颗粒（NT）和荧光颗粒（NF）的平均浓度均较高（NT = 2.01 cm-3，NF = 1。13 cm-3）比背景部位（NT = 1.79 cm-3，NF = 1.01 cm-3）。污水处理厂中NF和NT的时间变化很大，浓度峰值与现场活动一致。此外，时间分辨的荧光颗粒数尺寸分布显示了细颗粒（<1μm）占优势，而按通道数浓度显示的时间序列通道显示了主要生物荧光团的时间变异性。此外，在两个位置的整体和大小分离的荧光光谱是多峰的。特别是，荧光强度随着WWTP光谱中粒径的增加而增加，而这在背景光谱中是不存在的。此外，高度解析的SIBS荧光光谱与废水的EEM大致相似。
更新日期：2020-03-02
中文翻译：
实时检测和表征废水处理厂中生物气溶胶的排放。
废水处理厂的生物气溶胶排放可能对工人和附近社区造成不利的健康影响。为了检测和表征废水处理厂（WWTP）的生物气溶胶排放，在污水处理厂和背景工地采用了一种新型的实时生物气溶胶传感器，即光谱强度生物气溶胶传感器（SIBS）。SIBS实时记录单个粒子的一系列数据（两个激发波长（285 nm和370 nm）在298至735 nm的16个波长带上的大小，形状和荧光发射）。此外，将通过分光荧光计获得的废水样品的激发发射矩阵（EEM）与WWTP的SIBS光谱进行了比较。结果表明，污水处理厂的总颗粒（NT）和荧光颗粒（NF）的平均浓度均较高（NT = 2.01 cm-3，NF = 1。13 cm-3）比背景部位（NT = 1.79 cm-3，NF = 1.01 cm-3）。污水处理厂中NF和NT的时间变化很大，浓度峰值与现场活动一致。此外，时间分辨的荧光颗粒数尺寸分布显示了细颗粒（<1μm）占优势，而按通道数浓度显示的时间序列通道显示了主要生物荧光团的时间变异性。此外，在两个位置的整体和大小分离的荧光光谱是多峰的。特别是，荧光强度随着WWTP光谱中粒径的增加而增加，而这在背景光谱中是不存在的。此外，高度解析的SIBS荧光光谱与废水的EEM大致相似。
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