Wastewater treatment performance in microbiological removal and (oo)cyst viability assessed comparatively to fluorescence decay

Autor(es)

Medeiros, Raphael Correa ; Sammarro Silva, Kamila Jessie ; Daniel, Luiz Antonio

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL TECHNOLOGY; v. 43, n. 7, p. 9-pg., 2020-08-29.

Resumo

Municipal wastewater is a source of pathogenic protozoan (oo)cysts and may play a significant role in spreading waterborne diseases. This scenario becomes more critical as treated sewage from municipal wastewater treatment plants (WWTP) is discharged into springs, which are often used for water supply, irrigation, recreation and, further downstream, indirect potable reuse, quite common in Brazil. This study aimed to elucidate, regarding microbiological quality, the performance of a full-scale WWTP, consisting of preliminary treatment, upflow anaerobic sludge blanket (UASB) reactor, activated sludge system and ultraviolet (UV) radiation disinfection. Pathogenic protozoa (Giardiaspp. cysts andCryptosporidiumspp. oocysts), as well as microbiological indicators (Escherichia coliandClostridium perfringens), were evaluated in terms of their removal. In addition, (oo)cyst viability and fluorescence reduction were assessed. By using the data obtained from this research, the prevalence of infection estimated for the population served by the WWTP was between 7.4% and 14.8% for giardiasis, and between 0.055% and 0.11% for cryptosporidiosis. (AU)

• Processo FAPESP: 12/50522-0 - Contaminação ambiental pelos protozoários Giardia spp. e Cryptosporidium spp. e por Ascaris suum: desafios de detecção, remoção e inativação das formas infectantes
• Beneficiário: Regina Maura Bueno Franco
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/08653-8 - Remoção e inativação de microrganismos indicadores, cistos de Giardia spp. e de oocistos de Cryptosporidium spp. em sistemas de tratamento de esgoto sanitário
• Beneficiário: Luiz Antonio Daniel
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/07902-1 - Avaliação do comportamento dos protozoários Giardia spp. e Cryptosporidium spp. e de microrganismos indicadores frente ao tratamento de esgoto e após o lançamento no corpo receptor.
• Beneficiário: Raphael Corrêa Medeiros
• Modalidade de apoio: Bolsas no Brasil - Doutorado