Traitement des eaux de pluie par photocatalyse solaire

Blangis, David; Légube, B.

doi:10.1051/wqual/2007002

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Possible disinfection methods include UV light, chlorination, ozonation, and microfiltration. Emerging technologies, such as solar photocatalysis (Blangis and Legube, 2007), may help to further improve the reliability of treatment while reducing its cost.…”

Section: Recent Advances and Trendsmentioning

confidence: 99%

Reuse of Urban Runoff in Australia: A Review of Recent Advances and Remaining Challenges

et al. 2008

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The degradation of aquatic ecosystems due to hydrologic and water quality impacts of urbanization, combined with increasing water scarcity, has generated increasing interest in the harvesting of urban storm water. This paper reviews the rationale for integrated storm water treatment and harvesting and synthesizes recent advances and trends and knowledge gaps that limit its application. Storm water harvesting is shown to be a viable alternative water supply and to provide a potential solution to the increases in runoff frequency and peak flows that occur as a result of catchment urbanization. In general, treatment technologies for storm water harvesting have been adapted from existing "water-sensitive urban design" approaches, with limited use of traditional water supply and wastewater technologies. Risk management is often lacking, in part due to a lack of relevant guidance. Reported performance shows variable levels of potable water savings, with cases of up to 100% substitution recorded. Costs of storm water harvesting systems are shown to be inversely related to their scale. The limited cost data show the importance of context, with the harvested water costing more or less than alternative supplies, depending on the cost of the alternative. Limited data exist on environmental benefits, such as reductions in pollutant loads and flow peaks. Implementation of storm water harvesting systems is impeded by inadequate data on risk, lifecycle costs, externalities, and water-energy tradeoffs. Furthermore, retrofit of storm water harvesting into existing urban areas is proving to be a challenge, creating an urgent need for specific technologies for use in retrofit situations.

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Section: Recent Advances and Trendsmentioning

confidence: 99%

Reuse of Urban Runoff in Australia: A Review of Recent Advances and Remaining Challenges

et al. 2008

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Water Quality Monitoring and Hydraulic Evaluation of a Household Roof Runoff Harvesting System in France

Vialle

Sablayrolles

Lovera

et al. 2012

Water Resour Manage

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ter quality monitoring and hydraulic evaluation of a household roof runoff harvesting system in France. Water Resources Management, Springer Verlag, 2012, vol. 26, pp.2233-2241 AbstractThe quality of harvested rainwater used for toilet flushing in a private house in the south-west of France was assessed over a one-year period. Twenty-one physicochemical parameters were screened using standard analytical techniques. The microbiological quality of stored roof runoff was also investigated and total flora at 22°C and 36°C, total coliforms, Escherichia Coli, enteroccocci, Cryptospridium oocysts, Giardia cysts, Legionella species, Legionella pneumophila, Aeromonas, and Pseudomonas aeruginosa were analysed. Chemical and microbiological parameters fluctuated during the course of the study, with the highest levels of microbiological contamination observed in roof runoffs collected during the summer. Overall, the collected rainwater had a relatively good physicochemical quality but variable, and, did not meet the requirements for drinking water and a microbiological contamination of the water was observed. The water balance of a 4-people standard family rainwater harvesting system was also calculated in this case study. The following parameters were calculated: rainfall, toilets flushing demand, mains water, rainwater used and water saving efficiency. The experimental water saving efficiency was calculated as 87 %. The collection of rainwater from roofs, its storage and subsequent use for toilet flushing can save 42 m 3 of potable water per year for the studied system.

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Monitoring of water quality from roof runoff: Interpretation using multivariate analysis

et al. 2011

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The quality of harvested rainwater used for toilet flushing in a private house in the south-west of France was assessed over a one-year period. Temperature, pH, conductivity, colour, turbidity, anions, cations, alkalinity, total hardness and total organic carbon were screened using standard analytical techniques. Total flora at 22 °C and 36 °C, total coliforms, Escherichia coli and enterococci were analysed. Overall, the collected rainwater had good physicochemical quality but did not meet the requirements for drinking water. The stored rainwater is characterised by low conductivity, hardness and alkalinity compared to mains water. Three widely used bacterial indicators - total coliforms, E. coli and enterococci - were detected in the majority of samples, indicating microbiological contamination of the water. To elucidate factors affecting the rainwater composition, principal component analysis and cluster analysis were applied to the complete data set of 50 observations. Chemical and microbiological parameters fluctuated during the course of the study, with the highest levels of microbiological contamination observed in roof runoffs collected during the summer. E. coli and enterococci occurred simultaneously, and their presence was linked to precipitation. Runoff quality is also unpredictable because it is sensitive to the weather. Cluster analysis differentiated three clusters: ionic composition, parameters linked with the microbiological load and indicators of faecal contamination. In future surveys, parameters from these three groups will be simultaneously monitored to more accurately characterise roof-collected rainwater.

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Traitement des eaux de pluie par photocatalyse solaire

Cited by 3 publications

References 18 publications

Reuse of Urban Runoff in Australia: A Review of Recent Advances and Remaining Challenges

Reuse of Urban Runoff in Australia: A Review of Recent Advances and Remaining Challenges

Water Quality Monitoring and Hydraulic Evaluation of a Household Roof Runoff Harvesting System in France

Monitoring of water quality from roof runoff: Interpretation using multivariate analysis

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