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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2009.tde-29102009-101726
Document
Author
Full name
Patricia Garrafa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Mehnert, Dolores Ursula (President)
Bettiol, Wagner
Marques, Marilis do Valle
Matte, Glavur Rogerio
Sanchez, Petra Sanchez
Title in Portuguese
Avaliação da qualidade virológica do efluente doméstico tratado e disponibilizado para reúso na cidade de São Paulo.
Keywords in Portuguese
Esgotos sanitários
Microbiologia
Reação em cadeia por polimerase
Reúso de água
Rotavírus
Vírus da Hepatite A
Vírus entéricos
Abstract in Portuguese
O objetivo deste estudo foi avaliar a qualidade virológica da água de reúso produzida em uma das estações de tratamento de esgoto da cidade de São Paulo. Para tanto, foram coletadas concomitantemente 177 amostras de esgoto tratado (100L) e bruto (15L) e os vírus concentrados utilizando método Viradel-ultracentrifugação. Em seguida as amostras foram tratadas com Vertrel XF e os ácidos nucléicos extraídos para a detecção de adenovírus (HAdV), rotavírus (RV-A), norovírus e vírus da hepatite A (VHA). A detecção por PCR e/ou RT-PCR evidenciou RV-A (G1-G5), VHA e HAdV incluindo os da espécie F tanto no esgoto bruto quanto no tratado, no entanto norovírus não foram detectados em ambos os efluentes. A infectividade de RV-A e HAdV foi avaliada por cultivo celular e os rotavírus RV-A foram também quantificados por reação de imunoperoxidase direta. PCR em tempo real foi padronizada para quantificação de vírus não cultiváveis ou de difícil cultivo como os VHA. Com base nos resultados obtidos foi verificada a ocorrência e a distribuição anual de cada vírus nas águas de reúso.
Title in English
Evaluation of virological quality of treated wastewater available for urban reuse in Sao Paulo city.
Keywords in English
Enteric viruses
Hepatitis A virus
Microbiology
Polymerase chain reaction
Rotavirus
Sanitary sewer
Water reuse
Abstract in English
The aim of the study was to evaluate the virological quality from one Sewage Treatment Plant in the state of São Paulo. From January/2005 to November/2006, 177 samples (15L) of raw sewage were collected at the entrance and another 177 (100L) at the end of treatment, twice a week. Viruses were concentrated by filtration through positively charged microporous filters, followed by ultracentrifugation. Virus concentrates were treated by using Vertrel-XF and the viral genomes extracted for detection of adenovirus (HAdV), rotavirus (RV-A), norovirus and hepatitis A virus (HAV). PCR and RT-PCR revealed RV-A (G1-G5), HAV and HAdV, including the enteric ones (species F) in sewage and treated wastewater samples. Norovirus was not detected in any samples. The infectivity of HAdV and RV-A was assayed by inoculating onto suitable cell line. Immunoperoxidase assay was used to calculate the rotavirus FFU/L in the samples. Real time-PCR was standardized for enumeration of non-cultivable virus. The occurrence and annual distribution of each virus in reuse water were analyzed.
 
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Publishing Date
2009-12-08
 
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