Microbial contamination of the air at the wastewater treatment plant

Vítězová, Monika; Vítěz, Tomáš; Mlejnková, Hana; Lošák, Tomáš

doi:10.11118/actaun201260030233

Cited by 16 publications

(15 citation statements)

References 14 publications

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“…In most cases the wind speed reached from 0.0 to 1.0 m/s (43.6% of all measurements). The above-mentioned microclimatic parameters are similar to numerous literature reports [3,20,21,[24][25][26][27].…”

Section: Resultssupporting

confidence: 86%

“…According to Vítězová et al [27], the most abundant group of microorganisms in the monitored air were psychrophilic and mesophilic bacteria as well as microscopic fungi. The number of psychrophilic bacteria ranged from 14 to 12,000 CFU/m 3 , the number of mesophilic bacteria varied in the range from 20 to 18,500 CFU/ m 3 , and the fungi from 25 to 32,000 CFU/m 3 in the air.…”

Section: Resultsmentioning

confidence: 99%

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Wastewater Treatment Plants as a Source of Bioaerosols

Michałkiewicz¹

2019

Pol. J. Environ. Stud.

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This study presents the results of bioaerosol analyses conducted in the area of 9 wastewater treatment plants (WTTPs) in the Wielkopolska Region (Poland) with different capacities (from 500 to 200,000 m 3 /day). The abundance of mesophilic and psychrophilic bacteria, Staphylococcus, Actinobacteria, Pseudomonas fluorescens, coliform bacteria, and microscopic fungi in different plant sites and the control site were analysed. Microscopic fungi exhibited the highest contribution to air contamination and their highest median value was found in WWTP No. 5, which reached 6,700 colony forming units (CFU/m 3) of air. Psychrophiles and mesophiles were the most abundant bacterial groups. It was established that the highest concentration of bioaerosols was observed during the mechanical treatment of wastewater at sewage sludge treatment sites and near bioreactors. The R av parameter, which represents the ratio of average annual microbial abundance in the air to the average annual microbial abundance in the background at the control site, was a very good indicator of air contamination rate. This parameter may be analysed with respect to bacteria (R av B), microscopic fungi (R av F), and all microorganisms (R av M).

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Wastewater Treatment Plants as a Source of Bioaerosols

Michałkiewicz¹

2019

Pol. J. Environ. Stud.

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“…WWTPs can emit bioaerosols which contribute to the contamination of atmospheric air and pose a public health risk [24]. The microbial contamination of air in the WWTP evaluated by Vítězová et al [25] ranged from 10 1 to 10 4 CFU/m 3 for psychrophilic bacteria and from 10 1 to 10 4 CFU/m 3 for mesophilic bacteria. Air contamination was highest in the proximity of the activated sludge chamber, dried sludge storage and the mechanical segment of the wastewater treatment line.…”

Section: Determination Of Microbiological Air Quality Based On Total mentioning

confidence: 99%

Drug resistance in airborne bacteria isolated from waste management and wastewater treatment plants in Olsztyn

et al. 2019

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Wastewater treatment plants (WWTPs) and municipal waste management plants (MWMPs) emit bioaerosols containing potentially pathogenic biological components which post a threat for human health. Microbiological monitoring supports evaluations of the antibiotic resistance (AR) of airborne microorganisms and the relevant health risks. The aim of this study was to analyze the microbiological quality of air sampled in a WWTP and MWMP in Olsztyn based on total bacterial counts, the presence of bacteria resistant to three antibiotic classes (beta-lactams, tetracyclines and chloramphenicol) and genes encoding resistance to these antibiotics (blaTEM, blaSHV, blaCMY-2, blaAmpC, tet(M), tet(A), tet(X), tet(B), cmlA, floR, fexA, fexB and catA1 ). Bacterial counts were higher in air samples collected from the MWMP (~104 CFU/m3) than from the WWTP (101–103 CFU/m3). A similar trend was noted in the counts of antibiotic resistant bacteria (ARB). The abundance of ARB did not exceed 1.7 x 102 CFU/m3 in WWTP samples, but was higher at up to 4.2 x 103 CFU/m3 in MWMP samples. Bacteria resistant to doxycycline were least prevalent in the analyzed ARB. In the group of 49 tested bacterial strains, 44 harbored at least one of the analyzed antibiotic resistance genes (ARGs). A comparison of ARGs in all bacterial strains isolated from WWTP and MWMP air samples revealed the highest diversity and prevalence of ARGs in the samples collected in the mechanical segment of the waste processing line in MWMP and the biological segment of the wastewater processing line in WWTP. The results of this study point to high microbiological contamination of air in MWMPs and WWTPs which are reservoirs of ARB and ARGs and potential sources of AR.

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“…The moderately high temperature can affect the growth of microorganism due to the tendency of bacteria to die in high temperature, while the moderately high humidity will support the growth of microorganism. Moreover, WWTP's condition can also have effect on the concentration of bioaerosol when bioaerosol may be from the bubbles produced by aeration process or the oxygen produced by degradation process [10], may be pathogenic and develop allergy if inhaled [11]. When the samplings took place in dry season, no aeration occurred, and this caused lower bioaerosol emission.…”

Section: Fig 4 Bioaerosol According To Distance Variancementioning

confidence: 99%

“…The microorganism contained in bioaerosol such as bacteria and fungi are commonly found in the surrounding WWTP [8,9]. Bioaerosol in WWTP comes from bubbles generated from aeration process or oxygen from degradation process [10] which can be pathogenic and can cause allergy if inhaled thus making this bioaerosol existence highly influential in the quality of the ambient air [11]. The magnitude of this bioaerosol emission is influenced by factors such as WWTP capacity, applied treatment plant technology, applied treatment plant machines, applied treatment method, and content of contaminants in wastewater [10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Microbial Air Quality in the Surrounding Hospital’s Wastewater Treatment Plants in Jakarta, Indonesia

Kristanto

Rosana

2017

MATEC Web Conf.

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Abstract.As hospitals require the usage of various hazardous drugs and chemicals in its daily operation, the often contaminated wastewater of health facilities needs to be processed to comply with the quality standards specified in Regulation of the Governor of DKI Jakarta No. 65/2013. However, wastewater treatment plants (WWTP) can also pollute not only water but also the ambient air of facilities. The objective of this research is to identify airborne bacteria and the concentration of fungi due to the presence of WTP and to analyse the types of bacteria that exist through Gram Staining. Microbial air samples taken using EMS E6 showed that the average concentration of bioaerosol at hospital's WWTP was about 810-1,915 CFU/m 3 for bacteria and 1,450-1,955 CFU/m 3 for fungi. Furthermore, the highest concentration of bacteria and fungi found in the surrounding equalization and aeration tanks was 1,915 CFU/m 3 and 1,955 CFU/m 3 , respectively, which far exceeded the background value of 80 CFU/m 3 for bacteria and 440 CFU/m 3 for fungi. Gram staining of the bacteria found in the air surrounding WWTP showed 94% Gram-negative with the bacteria being pathogenic. Therefore, it is pertinent that further action is taken to prevent bioaerosol from spreading around WWTP by building better ventilation surrounding the plants, indicating the technology of the treatment plant to be used, and enforcing personal safety measures on WWTP's employees.

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Microbial contamination of the air at the wastewater treatment plant

Cited by 16 publications

References 14 publications

Wastewater Treatment Plants as a Source of Bioaerosols

Wastewater Treatment Plants as a Source of Bioaerosols

Drug resistance in airborne bacteria isolated from waste management and wastewater treatment plants in Olsztyn

Analysis of Microbial Air Quality in the Surrounding Hospital’s Wastewater Treatment Plants in Jakarta, Indonesia

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