Uso Da Radiação Solar Na Desinfecção Da Água De Poços Rasos

Amaral, Luiz Augusto do; Nunes, Ana Paula; Castania, J.; Lorenzon, Cíntia Sobue; Barros, Ludmilla Santana Soares e

doi:10.1590/1808-1657v73p0045006

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Resultados semelhantes estão relatados no trabalho de Brandão et al (2000), em que a desinfecção completa de 6,0 L de água com quantidades significativas de E. coli (10 5 UFC/100 mL) foi alcançada após 3 horas de exposição ao sol, em recipientes de vidro de base retangular (20 x 30 cm) com lâmina de água de 5,0 cm. Amaral et al (2006) relataram uma eficiência de 99,9 % de inativação de E. coli (7,5 x 10 2 UFC/100 mL inicial) em um processo de desinfecção solar em garrafas PET de 2,0 L. Após 5 horas de exposição a concentração final de bactérias remanescentes foi de 10 UFC/100 mL, valor ainda acima do estipulado pela Portaria 518 (Ministério da Saúde, 2004) quando se deseja atingir uma desinfecção eficiente de água destinada a consumo humano. Também utilizando garrafas PET, Joyce et al (1996) reportaram que foram necessárias 7 horas para a desinfecção completa de 2,0 L de água contendo 2,0 x 10 8 UFC/100 mL de E. coli, com temperaturas de até 55 °C.…”

Section: Desinfecção Solarunclassified

Estudo Cinético Do Processo De Desinfecção De Água Em Reator Solar

2008

Anais Congresso Brasileiro De Energia Solar - CBENS

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Resumo. Neste trabalho foi realizado um estudo experimental da eficiência de um reator solar na descontaminação de água para consumo humano utilizando a fotólise (UV) e a fotocatálise heterogênea (TiO 2 /UV) com a energia solar como fonte de radiação. Os experimentos foram do tipo batelada, num reator de leito fixo com filme fino (TFFBR), e os parâmetros temperatura do reator e incidência de luz solar foram monitorados on-line durante os experimentos. A eficiência do processo foi avaliada através de análises microbiológicas pelo método de membrana filtrante, pré e pósdesinfecção, utilizando a Escherichia coli como microrganismo indicador. As amostras de água contaminada (7,2x10 3 UFC/100 mL) foram coletadas de um poço artesiano na zona urbana. O sistema empregado foi capaz de promover uma completa desinfecção da água em 150 min usando apenas o efeito fototérmico, e em 120 min com a presença de TiO 2 imobilizado e de concentrador solar. O estudo cinético demonstrou que a inativação de E. coli nos processos de fotólise e fotocatálise seguiu a lei de Chick , sendo obtidas constantes de decaimento iguais a k = 0,063 min -1 para a fotólise, e k = 0,080 min -1 para os ensaios de fotocatálise.

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Section: Desinfecção Solarunclassified

Estudo Cinético Do Processo De Desinfecção De Água Em Reator Solar

2008

Anais Congresso Brasileiro De Energia Solar - CBENS

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“…Amaral et al, 2022) RBRH, Porto Alegre, v. 28, e34, 2023 4/9Evaluation of technical viability for urban rivers revitalization: Arroio Dilúvio case study in Porto Alegre/RS -Brazil Stage 2: Delimitation of premises and intervention layout in the section of watercourse.…”

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Evaluation of technical viability for urban rivers revitalization: Arroio Dilúvio case study in Porto Alegre/RS – Brazil

Medeiros,

Dornelles,

Silva

2023

RBRH

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The degradation of urban rivers is a phenomenon caused by virtually all cities intersected by rivers. Currently, there is a substantial number of revitalization projects in progress. Nonetheless, their execution demands significant investments, particularly for water quality enhancement. Moreover, apart from the cost factor, the scarcity of space along their banks constrains the implementation of improvement systems. This study introduces a simplified methodology aimed at evaluating the technical feasibility of revitalization interventions within urban river segments, with a focus on enhancing water quality and user experience. The method follows a structured framework encompassing four sequential phases: execution of hydraulic, hydrological, and sanitary analyses concerning the watershed; development of foundational principles and intervention strategies pertaining to the riverbed; appraisal of the congruence between proposed interventions and the intrinsic attributes of the river channel; comprehensive assessment of the overall viability of the revitalization initiative. The method's validation was conducted through a case study involving the Dilúvio Stream in Porto Alegre, RS, showcasing its coherent application and adaptability within the predetermined premises. Thus, the methodology emerges as a preliminary decision-making support tool for projects related to the urban river requalification domain, facilitating the identification of met prerequisites and provision of informed guidance.

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Microbiological Quality and Antibiotic Resistance Analysis of a Brazilian Water Supply Source

Silva

Ramos

Dziedzic

et al. 2010

Water Air Soil Pollut

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Water samples of the Passaúna River, Curitiba/Paraná (Brazil), were analyzed to determine total and thermotolerant coliform counts and Escherichia coli in order to provide information on human impacts on the water supply. Samples were collected and analyzed monthly, from March 2006 to February 2007, at five different locations along the river, and the multiple tube method was used to obtain total and thermotolerant coliform counts. The results varied from 130 MPN/100 mL to 1.6×10 6 MPN/100 mL for total coliforms, while for thermotolerant coliforms the variation was between 40 MPN/100 mL and 5× 10 5 MPN/100 mL. The E. coli strains isolated from the samples were tested with 13 different antibiotics to determine their antibiotic resistance. The isolated strains were constantly sensitive to seven of the 13 antibiotics tested, and resistant to at least one of the other antibiotics. The results indicated that two factors could influence the increased contamination on this river, viz., seasonality parameters and domestic wastewater discharges. The determination of antibiotic resistance indices aimed to provide information on the anthropogenic influence. Only one of the locations investigated was considered critical due to the anthropogenic influence, with significant impacts from irregular domestic wastewater discharges.

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Uso Da Radiação Solar Na Desinfecção Da Água De Poços Rasos

Cited by 5 publications

References 16 publications

Estudo Cinético Do Processo De Desinfecção De Água Em Reator Solar

Estudo Cinético Do Processo De Desinfecção De Água Em Reator Solar

Evaluation of technical viability for urban rivers revitalization: Arroio Dilúvio case study in Porto Alegre/RS – Brazil

Microbiological Quality and Antibiotic Resistance Analysis of a Brazilian Water Supply Source

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