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Efficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric viruses

Kaliakatsos Andreas, Kalogerakis Nikos, Manios Thrassyvoulos, Venieri Danai

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URIhttp://purl.tuc.gr/dl/dias/3E38240A-5F92-4122-975B-BCB1B18E645D-
Identifierhttps://doi.org/10.1002/jctb.6001-
Identifierhttps://onlinelibrary.wiley.com/doi/full/10.1002/jctb.6001-
Languageen-
Extent8 pagesen
TitleEfficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric virusesen
CreatorKaliakatsos Andreasen
CreatorΚαλιακατσος Ανδρεαςel
CreatorKalogerakis Nikosen
CreatorΚαλογερακης Νικοςel
CreatorManios Thrassyvoulosen
CreatorVenieri Danaien
CreatorΒενιερη Δαναηel
PublisherJohn Wiley and Sonsen
Content SummaryPathogenic microorganisms at the effluents of treatment plants entail a potential risk to public health. Enteric viruses such as adenoviruses (AdVs) and enteroviruses (EVs) are responsible for many waterborne diseases. Wastewater treatment methods eliminate successfully the load of indicators but other pathogens such as viruses have been detected in high concentrations at the effluents of wastewater plants. In this perspective, two constructed wetlands (CWs) systems (S1 and S2) were employed and fed with primary wastewater. S1 consists of a free water surface (FWS) wetland and a horizontal subsurface flow (HSSF) wetland working in series, while S2 consists only of the HSSF. Also, both systems included a sand filter (SF) after the HSSF. RESULTS: Results showed that these low-cost systems are capable of eliminating effectively the bacterial indictors (total coliforms, Escherichia coli, Enterococci) achieving removal rates of almost 99% for S1 (3.2–4 Log units) and 89–98% for S2 (1.9–2.7 Log units). Regarding viruses, AdVs, EVs and phages were detected at all sampling points and during all seasons, and they were only partly removed in S1 and/or S2. For example, the virus load was decreased by 2.5 Log units for AdVs and 3.4 Log units for EVs in the case of S1, while the respective values were 4.3 and 1.9 Log units for S2. CONCLUSIONS: Generally, CWs eliminated successfully the bacterial load, while the remaining virus load was significant, thus strengthening the argument that viruses could be a reliable indicator for fecal contamination. © 2019 Society of Chemical Industry.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2020-05-28-
Date of Publication2019-
SubjectBacteriophagesen
SubjectConstructed wetlandsen
SubjectDisinfectionen
SubjectFecal indicatorsen
SubjectVirusesen
Bibliographic CitationA. Kaliakatsos, N. Kalogerakis, T. Manios and D. Venieri, "Efficiency of two constructed wetland systems for wastewater treatment: removal of bacterial indicators and enteric viruses," J. Chem. Technol. Biotechnol., vol. 94, no. 7, pp. 2123-2130, Jul. 2019. doi: 10.1002/jctb.6001en

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