Desinfecção de efluentes com tratamento terciário utilizando energia solar (SODIS): avaliação do uso do dispositivo para concentração dos raios solares

Paterniani, José Euclides Stipp; Silva, Marcelo Jacomini Moreira da

doi:10.1590/s1413-41522005000100002

Cited by 8 publications

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“…The climatic characteristics of the weather during the study also influenced the microbial growth of the samples, shown in Tables 4 and 5, the average maximum temperatures reached in the collections were 34.27° and 34.46°, respectively, not being sufficient for disinfection of the samples. Paterniani and Silva (2005) affirmed that water heating and bacterial inactivation are influenced by weather conditions during the time of exposure to the sun, where infrared radiation is responsible for the rise in water temperature, such an increase that after 50°C it helps in disinfecting water and preventing bacterial regrowth.…”

Section: Discussionmentioning

confidence: 99%

“…The solar water disinfection technique has no residual effect, which favors microbial regrowth 24 h after the end of the disinfection process when the water temperature was below 50°C (Paterniani and Silva, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Moringa oleifera is one of the most studied species and considered one of the potential substitutes for chemical coagulants. Paterniani and Silva (2005), in a work carried out at the Sanitation Laboratory of the Faculty of Agricultural Engineering at UNICAMP, in Campinas, SP, using M. oleifera seeds for surface water treatment, obtained medium reductions in turbidity and apparent color of 90% by simple sedimentation and 96% by slow filtration. Amaral et al (2006) also using M. oleifera seed extracts added to water to be disinfected by solar radiation in Polyethylene Terephthalate (PET) bottles and concluded that even for high turbidity values, in the order of 200 to 250 Nephelometric Turbidity Units (NTU), total inactivation of Escherichia coli was obtained after 12 h of exposure to the sun.…”

Section: Introductionmentioning

confidence: 99%

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Alternative water treatment using organic polymers associated with the solar disinfection method

Lima¹,

Barros²

2021

J. Public Health Epidemiol.

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The objective of this study was to carry out an alternative treatment of low-cost water using organic polymers, Moringa oleifera seed, Opuntia cochenillifera and Cereus jamacaru, associated with the technique of solar water disinfection. From July to November 2020, the samples were collected within the university campus of the Federal University of Recôncavo from Bahia. The count of total coliforms, Escherichia coli and aerobic mesophilic microorganisms were performed. The physicochemical analysis was also carried out (pH, color, turbidity, Dissolved Oxygen and temperature). Analyzes were performed at time 0 (before exposure to the sun) and time 1 (after exposure to the sun). The microbiological results were compared, based on the quality criteria established by the Consolidation Ordinance n. 5, of September 28, 2017 from the Ministry of Health. For the control of total coliforms, there was no significant interaction between the levels observed, in both treatments and times. In collection 1, the M. oleifera, after being exposed to the sun, proved to be more efficient in controlling mesophilic microorganisms. The C. jamacaru stood out with satisfactory performance in the two collections in the control of E. coli. In the physicochemical parameters, O. cochenillifera was the species that showed the best performance in decreasing the color and turbidity. We concluded that the polymers were efficient in the control of microbiological and physicochemical characteristics of the water, however, the levels reached were not sufficient to meet the quality parameters established by the current legislation. Therefore, further studies are recommended to improve the technique.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Alternative water treatment using organic polymers associated with the solar disinfection method

Lima¹,

Barros²

2021

J. Public Health Epidemiol.

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“…Para ratificar a eficiência do método utilizamos uma garrafa controle (garrafa sem exposição ao sol) com a amostra no mesmo tempo de exposição das garrafas no sol (6 h), isso proporcionou a verificação da crescimento/decrescimento de bactérias na água sem o uso do método SODIS [5].…”

Section: Materiais E Métodosunclassified

Water Treatment With Sodis for Ribeirinhas Communities

Silva¹,

Gomes²

2017

ITEGAM- Journal of Engineering and Technology for Industrial Applications (ITEGAM-JETIA)

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SODIS (Solar Water Disinfection) is an alternative to traditional methods of water disinfection and consists of exposing under the sun containers filled with water to be disinfected. This research aims to check SODIS efficiency in the representative context of riverine communities which use rainwater for drinking. The analysis included turbidity, pH, temperature, E. coli and total coliforms (MPN/100ml). The samples were raw water at 0h; after 6 hours of sun exposure; and water 24 hours after the use of SODIS for identifying bacterial regrowth. We conducted an experiment on sunny and cloudy days, analyzing the base supporting the bottles and half-face painted bottles. We obtained the following results: a) the experiment conducted in sunny day decreased from 4 to 0NMP/100 ml coliform bacteria and E. coli, resulting in 100% inactivation, without regrowth after 24 hours; the temperature was 55 ° C on average and maximum of 57 ° C in bottles painted with half face black; b) on cloudy day SODIS decreased total coliforms and E. coli from 4 to 0NMP/100 mL after 6 hours of exposure; the temperature was 45°C and maximum 47°C in painted bottles. The results indicated that the metal surface had no positive influence on the water temperature; the pH remained on average 7.3; Turbidity was 2UNT. We concluded that the SODIS method is effective for the household treatment of rainwater.

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“…Estes equipamentos interceptam os raios solares e refletem-nos na placa coletora, aumentando assim a radiação solar captada pelo sistema. A tecnologia de concentradores solares já tem sido explorada para algumas aplicações, como desinfecção biológica de águas em comunidades isoladas (PATERNIANI & SILVA, 2005).…”

Section: Introductionunclassified

Utilização de sistemas fototérmicos com concentradores para higienização de salas de ordenha

Altoé

Filho

2010

Eng. Agríc.

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RESUMO:Neste trabalho, analisou-se a viabilidade do uso de concentradores de radiação solar em sistemas fototérmicos para higienização de salas de ordenha. Foram analisadas três opções para aquecimento de água com reservatório de acumulação: sistema com resistência elétrica, sistema solar com concentrador e sistema solar sem concentrador. Calculou-se o custo total dessas alternativas e o valor presente líquido do sistema solar suplementado por lenha de eucalipto comprada, lenha de eucalipto produzida na propriedade rural, energia elétrica e gás liquefeito de petróleo (GLP). Realizou-se uma análise de sensibilidade do sistema fototérmico variando o número de vacas lactantes, o custo da energia elétrica e da lenha, a taxa de juros, o custo dos componentes do sistema, a vida útil e o subsídio no valor do equipamento. O sistema fototérmico com concentrador suplementado por lenha produzida na propriedade foi a alternativa de aquecimento mais viável economicamente. O uso dos concentradores gera uma redução de cerca de 10% no custo de aquisição do sistema de aquecimento solar. PALAVRAS-CHAVE:energia solar, aquecimento de água, produção de leite. USE OF THE THERMAL SOLAR SYSTEMS WITH CONCENTRATORS FOR THE HYGIENE OF MILKING PARLOR ABSTRACT:In this study, we analyzed the feasibility of using radiation concentrators in thermal solar systems for the hygiene of milking parlors. We analyzed three options for water heating with tank accumulation: system with electric resistance, the solar system with concentrator and the solar system without concentrator. It was calculated the total cost of these alternatives and the net present value of the solar system supplemented by purchased eucalyptus wood, eucalyptus wood produced on the farm, electricity and liquefied petroleum gas (LPG). A sensitivity analysis of the thermal solar system varying the number of dairy cows, the electricity and the firewood costs, the interest rate, the system's components cost, the life expectancy and the subsidy on the equipment value. The thermal solar system with concentrator supplemented by firewood produced on the property was the more feasible heating alternative. The use of concentrators caused a reduction of around 10 % of the purchase cost of solar heating system.

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Desinfecção de efluentes com tratamento terciário utilizando energia solar (SODIS): avaliação do uso do dispositivo para concentração dos raios solares

Cited by 8 publications

References 0 publications

Alternative water treatment using organic polymers associated with the solar disinfection method

Alternative water treatment using organic polymers associated with the solar disinfection method

Water Treatment With Sodis for Ribeirinhas Communities

Utilização de sistemas fototérmicos com concentradores para higienização de salas de ordenha

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