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The variability of the concentration of bioaerosols above the chambers of biological wastewater treatment

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The article presents the results of research over microorganisms (psychrophilic and mesophilic bacteria and microscopic fungi) found in wastewater in denitrification and nitrification chambers and specifies the proportion of these microorganisms in bioaerosol at various levels above wastewater level (20, 50 and 100 cm). In the denitrification chamber (anoxic) in 1 cm3 of sewage there were on average 30.35 · 106 CFU of mesophilic bacteria, 72.88 · 106 CFU of psychrophilic bacteria, and 37.3 · 105 CFU of microscopic fungi. In the nitrification chamber, where the oxygen concentration ranged from 0.37 to 2.32 mg O2·dm−3 of wastewater, the number of microorganisms was lower. In 1 cm3 of wastewater there were on average 20.2 · 106 CFU of mesophilic bacteria, 51.76 · 106 CFU of psychrophilic bacteria, and 15.22 · 105 CFU of microscopic fungi. In sewage bioaerosols above these chambers, higher numbers of psychrophilic bacteria than mesophilic ones and microscopic fungi were reported. At the same time differences in the number of microorganisms at different heights above the surface of wastewater could be observed in bioaerosol, as well as between the chambers of the bioreactor. It was found that most frequently the amount of microorganisms decreased with height. The percentage emission ratio (ER) of microorganisms in bioaerosols coming from wastewater accounted for only a fraction of a percent and ranged from 1.13 · 10−8 % (microscopic fungi over the denitrification chamber) to 24.53 · 10−9 % (psychrophilic bacteria over the denitrification chamber). It was found that the process of mixing, aeration of wastewater, have an effect on the emission of microorganisms.
Rocznik
Strony
267--278
Opis fizyczny
Bibliogr. 31 poz., tab.
Twórcy
  • Institute of Environmental Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland, phone +48 61 665 3496, fax +48 61 665 2439, Michal.Michalkiewicz@put.poznan.pl
  • Institute of Environmental Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland, phone +48 61 665 3496, fax +48 61 665 2439, Izabela.Kruszelnicka@put.poznan.pl
autor
  • Office of Engineering and Design AKPRO, ul. M. Dąbrowskiej 4, 62-050 Mosina, Poland
Bibliografia
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Uwagi
PL
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-1cd48f8e-127a-46ef-b6e8-256b52d46b94
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