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Publication
Índice de Contaminação Microbiana e de SARS-CoV-2 em efluentes urbanos e águas de recreio na região Algarvia
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Abstract(s)
A presença do SARS-CoV-2 nas águas pode designar uma preocupação e deve ser estudada para compreender melhor a disseminação do vírus e qual o papel que o ciclo urbano da água pode ter na transmissão deste vírus. Este estudo teve como objectivo avaliar os níveis de contaminação fecal das águas residuais com indicadores de contaminação fecal clássicos (Escherichia coli (E. coli) e Enterococos intestinais (IE)) e a eficiência de remoção nas estações de tratamento das ETAR’s menos convencional (colifagos somáticos); bem como a possível detecção ou não de SARS-CoV-2.
O SARS-CoV-2 e os parâmetros microbiológicos foram monitorizados em amostras de águas residuais brutas e tratadas, e amostras ambientais foram colhidas em diversos locais da Ria Formosa. Cinco campanhas de amostragem foram realizadas entre 2020 e 2021. Foram colhidas amostras em três estações ambientais na Ria Formosa (Ilha de Faro, cais comercial de Faro, cais de Olhão) bem como afluentes e efluentes de três Estações de Tratamento de Águas Residuais (ETAR) (Faro-Aeroporto, Olhão e Vilamoura). A presença do SARS-CoV-2 nas águas residuais foi investigada, os resultados revelam alta prevalência de contaminação viral na ETARS da Ria Formosa. O SARS-CoV-2 parece não ter capacidade de sobreviver em áreas costeiras, bem como em estações de tratamento de água na região do Algarve. Este estudo mostrou o potencial de detectar o SARS-CoV-2 em águas residuais como uma ferramenta de alerta precoce e previsão para a propagação da doença.
The presence of SARS-CoV-2 in waters can be a concern and should be studied to better understand the spread of the virus and what role the urban water cycle may play in the transmission of this virus. This study aimed to evaluate the levels of fecal contamination of wastewater with classical fecal contamination indicators (Escherichia coli (E. coli) and intestinal Enterococci (IE)) and the efficiency of removal in the treatment plants of less conventional WWTP's (coliphages somatic). SARS-CoV-2 and microbiological parameters were monitored in raw and treated wastewater samples, and environmental samples were collected at different locations in the Ria Formosa. Five sampling campaigns were carried out between 2020 and 2021. Three environmental stations were sampled in the Ria Formosa (Faro Island, Faro commercial pier, Olhão pier) as well as tributaries and effluents from three Wastewater Treatment Plants (Faro-Aeroporto , Olhão and Vilamoura). The presence of SARS-CoV-2 in wastewater was investigated, the results reveal a high prevalence of viral contamination at the Ria Formosa WWTP. SARS-CoV-2 appears to have no ability to survive in coastal areas as well as in water treatment plants in the Algarve region. This study showed the potential of detecting SARS-CoV-2 in wastewater as an early warning and prediction tool for the spread of the disease.
The presence of SARS-CoV-2 in waters can be a concern and should be studied to better understand the spread of the virus and what role the urban water cycle may play in the transmission of this virus. This study aimed to evaluate the levels of fecal contamination of wastewater with classical fecal contamination indicators (Escherichia coli (E. coli) and intestinal Enterococci (IE)) and the efficiency of removal in the treatment plants of less conventional WWTP's (coliphages somatic). SARS-CoV-2 and microbiological parameters were monitored in raw and treated wastewater samples, and environmental samples were collected at different locations in the Ria Formosa. Five sampling campaigns were carried out between 2020 and 2021. Three environmental stations were sampled in the Ria Formosa (Faro Island, Faro commercial pier, Olhão pier) as well as tributaries and effluents from three Wastewater Treatment Plants (Faro-Aeroporto , Olhão and Vilamoura). The presence of SARS-CoV-2 in wastewater was investigated, the results reveal a high prevalence of viral contamination at the Ria Formosa WWTP. SARS-CoV-2 appears to have no ability to survive in coastal areas as well as in water treatment plants in the Algarve region. This study showed the potential of detecting SARS-CoV-2 in wastewater as an early warning and prediction tool for the spread of the disease.
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Keywords
Águas residuais Águas de recreio Contaminação microbiana SARS-CoV-2