Effect of agitation, turbidity, aluminium foil reflectors and container volume on the inactivation efficiency of batch-process solar disinfectors

Kehoe, S.C.

doi:10.1016/s0043-1354(00)00353-5

Cited by 110 publications

(88 citation statements)

References 10 publications

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“…Table 2 presents its main physico-chemical characteristics before and after phototreatment. Water composition has a great influence on the photodisinfection treatment, and light penetration is minimal in highly turbid water (Joyce et al 1996;Kehoe et al 2001). To realize an efficient photo-disinfection, it is recommended to conduct it in water with less than 30 NTU turbidity (Byrne et al 2011).…”

Section: Resultsmentioning

confidence: 99%

Solar light (hv) and H2O2/hv photo-disinfection of natural alkaline water (pH 8.6) in a compound parabolic collector at different day periods in Sahelian region

Ndounla

Pulgarín

2015

Environ Sci Pollut Res

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The photo-disinfection of natural alkaline surface water (pH 8.6±0.3) for drinking purposes was carried out under solar radiation treatments. The enteric bacteria studied were the wild total coliforms/Escherichia coli (10 4 CFU/ml) and Salmonella spp. (10 4 CFU/ml) naturally present in the water. The photo-disinfection of a 25-l water sample was carried out in a solar compound parabolic collector (CPC) in the absence and in the presence of hydrogen peroxide (H 2 O 2 ). The addition of H 2 O 2 (10 mg/L) to the sample water was sufficient to enhance the photo-disinfection and ensure an irreversible lethal action on the wild enteric bacteria contents of the sample. The inactivation kinetic of the system was significantly enhanced compared to the one carried out without H 2 O 2 addition. The effect of the solar radiation parameters on the efficiency of the photo-disinfection were assessed. The pH has increased during the treatment in all the photodisinfection processes (hv and H 2 O 2 /hv). The Salmonella spp strain has shown the best effective inactivate time in alkaline water than the one recorded under acidic or near-neutral conditions. The evolution of some physico-chemical parameters of the water (turbidity, NO 2 − , NO 3 − , NH 4 + , HPO 4 2− , and bicarbonate (HCO 3 − )) was monitored during the treatment. Finally, the possible mechanistic process involved during the enteric bacteria inactivation was suggested.

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Section: Resultsmentioning

confidence: 99%

Solar light (hv) and H2O2/hv photo-disinfection of natural alkaline water (pH 8.6) in a compound parabolic collector at different day periods in Sahelian region

Ndounla

Pulgarín

2015

Environ Sci Pollut Res

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“…It has been concluded that higher turbidity samples exposed to sunlight had less inactivation of E. coli compared to samples with little or no turbidity. This may be occurred due to the protective effect of particulate matter [22,23,39]. Suspended solids need to be reduced to a maximum of 5 µm in order to achieve effective inactivation.…”

Section: Impuritiesmentioning

confidence: 99%

“…The aim of this literature review is to give information about solar disinfection mechanism, to compare the efficiency of solar disinfection on different microorganisms based on the previous studies, and to discuss the several applications of solar disinfection on the worldwide [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Drinking Water Disinfection by Solar Radiation

Teksoy¹,

Eleren²

2017

eer

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A primary concern of developing countries throughout the world is that of obtaining safe drinking water. Waterborne diseases are still common in developing countries since drinking water sources are contaminated and the conventional rural water treatment plants are often inefficient to produce safe drinking water. This situation in developing countries is a major problem in terms of preventing public health. It is estimated that diarrhea accounted for 99% of the 69 million deaths among children before the age of five. Inadequate operation and maintenance after installations caused by a lack of trained operators, by a treacherous supply of chemicals and spare parts, and by financial problems lead to produce unhealthy drinking water. Since major urban water supplies are also not always capable of maintaining a regular supply of qualitatively good water, the distributed water is often considered unsafe for direct consumption. Treatment of water at the household level (etc. boiling) or purchasing of mineral water for consumption is more real than an exception in urban areas of developing countries. Recently, another small-scale approach using the lethal effect of sunlight has gained importance to sanitary contaminated water. Solar disinfection (SODIS) is one of the simplest methods for providing acceptable quality drinking water and consists of filling transparent containers (plastic bags, plastic bottles or glass bottles) with water and exposing the containers to sunlight for approximately 6 hours. Because of the low cost and easy usage, solar disinfection is commonly used in developing countries in Asia, Africa and South America. The aim of this literature review is to give information about solar disinfection mechanism, to compare the efficiency of solar disinfection on different microorganisms based on the past studies, and to discuss the several applications of solar disinfection in the world.

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“…Em consequência, para a aplicação da desinfecção solar em batelada usando garrafas PET, é recomendada a aeração da água por agitação manual das garrafas. Kehoe et al (2001) sugerem encher a garrafa até 2/3 de sua capacidade, agitá-la durante um minuto para garantir altas concentrações iniciais de oxigênio dissolvido, completar o restante da garrafa e, então, expôr a mesma à radiação solar (Figura 3). Botto et al (2009) no entanto, obtiveram, pesquisando o efeito da agitação manual das garrafas na inativação de coliformes termotolerantes, resultados que indicam não haver diferença significativa na eficiência deste indicador microbiológico comparando os dois métodos estudados, com e sem agitação (p>0,05).…”

Section: Características E Eficiência De Inativaçãounclassified

Captação, Manejo e Uso de Água de Chuva

Santos¹,

Medeiros²,

Brito³

et al. 2015

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Effect of agitation, turbidity, aluminium foil reflectors and container volume on the inactivation efficiency of batch-process solar disinfectors

Cited by 110 publications

References 10 publications

Solar light (hv) and H2O2/hv photo-disinfection of natural alkaline water (pH 8.6) in a compound parabolic collector at different day periods in Sahelian region

Solar light (hv) and H2O2/hv photo-disinfection of natural alkaline water (pH 8.6) in a compound parabolic collector at different day periods in Sahelian region

Drinking Water Disinfection by Solar Radiation

Captação, Manejo e Uso de Água de Chuva

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