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Biological Activated Sludge from Wastewater Treatment Plant before and during the COVID-19 Pandemic.
Roman, Marius-Daniel; Sava, Cornel; Iluțiu-Varvara, Dana-Adriana; Mare, Roxana; Pruteanu, Lavinia-Lorena; Pica, Elena Maria; Jäntschi, Lorentz.
  • Roman MD; Faculty of Building Services Engineering, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
  • Sava C; Faculty of Engineering Materials and the Environment, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
  • Iluțiu-Varvara DA; Faculty of Building Services Engineering, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
  • Mare R; Faculty of Building Services Engineering, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
  • Pruteanu LL; Department of Chemistry and Biology, North University Center at Baia Mare, Technical University of Cluj-Napoca, 76 Victoriei Street, 430122 Baia Mare, Romania.
  • Pica EM; Faculty of Engineering Materials and the Environment, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
  • Jäntschi L; Department of Physics and Chemistry, Technical University of Cluj-Napoca, 103-105 Bd. Muncii, 400641 Cluj-Napoca, Romania.
Int J Environ Res Public Health ; 19(18)2022 Sep 08.
Article in English | MEDLINE | ID: covidwho-2010095
ABSTRACT
The COVID-19 pandemic and the related measures brought a change in daily life that affected the characteristics of the municipal wastewater and further, of the biological activated sludge. The activated sludge process is the most widely used biological wastewater treatment process in developed areas. In this paper, we aim to show the situation of specific investigations concerning the variation of the physicochemical parameters and biological composition of the activated sludge from one conventional wastewater treatment plant from a metropolitan area. The investigations were carried out for three years 2019, 2020 and 2021. The results showed the most representative taxa of microorganisms Microtrix, Aspidisca cicada, Vorticella convallaria, Ciliata free of the unknown and Epistylis and Rotifers. Even if other microorganisms were found in the sludge flocs, their small presence did not influence in any way the quality of the activated sludge and of the wastewater treatment process. That is why we conclude that protozoa (especially Flagellates and Ciliates) and rotifers were the most important. Together with the values and variation of the physicochemical parameters, they indicated a good, healthy, and stable activated sludge, along with an efficient purifying treatment process, no matter the loading conditions.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Water Purification / COVID-19 Type of study: Observational study Limits: Humans Language: English Year: 2022 Document Type: Article Affiliation country: Ijerph191811323

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Water Purification / COVID-19 Type of study: Observational study Limits: Humans Language: English Year: 2022 Document Type: Article Affiliation country: Ijerph191811323