Particle size distribution of cultivable airborne microbes and inhalable particulate matter in a wastewater treatment plant facility

Katsivela, Eleftheria; Latos, E.; Raisi, Louiza; Aleksandropoulou, V.; Lazaridis, Mihalis

doi:10.1007/s10453-016-9470-2

Cited by 24 publications

(16 citation statements)

References 41 publications

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“…Katsivela et al found no significant relationship between the fungi and temperature. This suggests that the lack of relationship between temperature and fungi may be due to the temperature changes affected by another meteorological parameter (44). Furthermore, the air microbial and chemical composition of each region and particle concentration are important.…”

Section: Discussionmentioning

confidence: 99%

“…Some studies have indicated that microbial particles in different sizes were not equally affected by climatic conditions. This can be attributed to the existence of microbial particles in different sizes, different species, as well as in different phases of growth (44,48,49). In some studies, fungal particles with 0.65-1.1 µm diameters had a positive correlation with wind speed and negative correlation with the UV index (50,51).…”

Section: Discussionmentioning

confidence: 99%

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Identification of airborne fungi’s concentrations in indoor and outdoor air of municipal wastewater treatment plant

Talepour

Hassanvand

Montazeri

et al. 2020

Environ Health Eng Manag

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Background: Airborne fungi play an important role the quality of indoor and outdoor air. The aim of this study was to investigate the concentration of airborne fungi around different parts of the wastewater treatment plant (WWTP) in the west of Ahvaz and its relationship with some important meteorological parameters. Methods: This study was conducted on a WWTP in the west of Ahvaz during 4 months in both cold and warm seasons. Samples were collected from 2-and 10-m intervals of the grit chamber (GCh), primary sludge dewatering basin (PSDB), and aeration tank (AT), as well as 60 m upstream (US), downstream (DS), and administrative building (AB) of the WWTP. Bioaerosols were collected using passive sampling method. Temperature, humidity, wind speed, wind direction, and ultraviolet index (UV) were also measured at the time of sampling. Results: The total concentration of fungi was 46.1 ± 43 CFU/plate/h. The highest concentration of fungi (92.2 ± 28.12 CFU/plate/h) was found 2 m away from the GCh in the cold season and the lowest one (24.6 ± 6.67 CFU/plate/h) was found at the 10-m distance of the AT in the warm season. The dominant fungal genus included Cladosporium, Alternaria, Yeast, and Aspergillus, respectively. Also, there was a significant relationship between the degree of fungal contamination in different units, the US and DS of the WWTP, and there was a negative relationship between the release of fungi and UV. Conclusion: According to the results, grit chamber plays an important role in releasing airborne fungi. Also, airborne fungi were reduced with an increase in distance and UV.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Identification of airborne fungi’s concentrations in indoor and outdoor air of municipal wastewater treatment plant

Talepour

Hassanvand

Montazeri

et al. 2020

Environ Health Eng Manag

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“…coli in CFU/m 3 were estimated by dividing the number of colonies in CFU by the sampled air volume in m 3 ( Hung et al, 2010 ). Then, the bioaerosol concentration was the sum of the concentrations of the six Petri dish stages of the Andersen six-stage cascade impactor ( Katsivela et al, 2017 ).…”

Section: Methodsmentioning

confidence: 99%

Quantitative microbial risk assessment and sensitivity analysis for workers exposed to pathogenic bacterial bioaerosols under various aeration modes in two wastewater treatment plants

Chen

Yang

et al. 2021

Science of The Total Environment

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Wastewater treatment plants (WWTPs) could emit a large amount of bioaerosols containing pathogenic bacteria. Assessing the health risks of exposure to these bioaerosols by using quantitative microbial risk assessment (QMRA) is important to protect workers in WWTPs. However, the relative impacts of the stochastic input variables on the health risks determined in QMRA remain vague. Hence, this study performed a Monte Carlo simulation-based QMRA case study for workers exposing to S . aureus or E . coli bioaerosols and a sensitivity analysis in two WWTPs with various aeration modes. Results showed that when workers equipped without personal protective equipment (PPE) were exposed to S . aureus or E . coli bioaerosol in the two WWTPs, the annual probability of infection considerably exceeded the U.S. EPA benchmark (≤10E-4 pppy), and the disease burden did not satisfy the WHO benchmark (≤10E-6 DALYs pppy) (except exposure to E . coli bioaerosol for disease health risk burden). Nevertheless, the use of PPE effectively reduced the annual infection health risk to an acceptable level and converted the disease health risk burden to a highly acceptable level. Referring to the sensitivity analysis, the contribution of mechanical aeration modes to the variability of the health risks was absolutely dominated in the WWTPs. On the aeration mode that showed high exposure concentration, the three input exposure parameters (exposure time, aerosol ingestion rate, and breathing rate) had a great impact on health risks. The health risks were also prone to being highly influenced by the various choices of the dose–response model and related parameters. Current research systematically delivered new data and a novel perspective on the sensitivity analysis of QMRA. Then, management decisions could be executed by authorities on the basis of the results of this sensitivity analysis to reduce related occupational health risks of workers in WWTPs.

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“…Different selective microbiological growth media were used for the cultivation of viable airborne microbes (Lazaridis et al, 2015;Lazaridis et al, 2018;Katsivela et al, 2017). Two sequential repetitions on each specific growth medium were done at each site.…”

Section: Bioaerosol Sampling and Measurementsmentioning

confidence: 99%

Viable Airborne and Deposited Microorganisms inside the Historical Museum of Crete

Katsivela

Raisi

Lazaridis

2021

Aerosol Air Qual. Res.

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Measurements of viable ambient microbial levels and of microbial deposits on surfaces were performed in the Historical Museum of Crete for a period of two years. The concentrations of airborne microbes in museum rooms showed a considerable variability, which is mainly related to indoor activities (such as the number of visitors), the regulation of the indoor environmental conditions and air exchange rate, the chemical composition and conservation treatment of the exhibits, as well as the cleaning and storage conditions. An enrichment of acid producing bacteria, heterotrophic bacteria, and autotrophic chemolithotrophic bacteria was encountered indoors. A considerable decrease of the measured viable microbes was measured after the deployment of photocatalytic ionizers in the different indoor sites ranging from 5.5 % to 76 %. The use of photocatalytic ionizers improved the air quality by reducing mainly the presence of acid producing bacteria, which may cause the deterioration of cultural heritage objects. The microbial colonization on 24 different painting materials and surfaces of model essays, without the use of any preservation treatment, was examined for an exposure period of 18 months. The results from the bacterial deposition on paintings showed a gradual colonization, specific to the materials and surfaces, in concentrations ranging from 10 to 300,000 CFU cm-2. Although airborne fungi were measured in the exhibition rooms (yearly average concentration: 143 ± 115 CFU m-3), no growth of fungi could be detected on the majority of the used painting materials of the model essays. Very slow fungal surface colonization could be only determined on tempera, charcoal, wax pastel, and carton board in low concentrations ranging from 70 to 200 CFU cm-2 .

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Particle size distribution of cultivable airborne microbes and inhalable particulate matter in a wastewater treatment plant facility

Cited by 24 publications

References 41 publications

Identification of airborne fungi’s concentrations in indoor and outdoor air of municipal wastewater treatment plant

Identification of airborne fungi’s concentrations in indoor and outdoor air of municipal wastewater treatment plant

Quantitative microbial risk assessment and sensitivity analysis for workers exposed to pathogenic bacterial bioaerosols under various aeration modes in two wastewater treatment plants

Viable Airborne and Deposited Microorganisms inside the Historical Museum of Crete

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