Use of rainwater for non potables purposes in public elementary school: case study in a school in São Bernardo do Campo


The current model of water supply considers potable water for all types of uses, even if some of them don’t need the same quality characteristics. With less waste of water and using alternatives sources for non potables uses, the pressure on demand would be decreased. One of the alternatives sources to water supply for non potables uses is the rainwater catchment. This water can be caught, treated and distributed in the same place of use. Pointing to this perspective this article purposes the use of rainwater for non potables uses in a school of ABC,
region from São Paulo state. According to the studies, adopting the hypothesis of water complementarity and not the complete replacement of sources, it is possible to save more than 50% of the water volume spends on toilets flushing using a rain water catchment system with a reservation of 15m ³. For the case study, the estimated cost of implementing the system is about R$ 60,000.00 with a time to value around 5 years.

CECIN, Jorge Alberto; ZANELLA, Luciano; ALVES, Wolney Castilho. Adoção de fontes alternativas para a conservação de água no meio urbano: aproveitando direto de precipitação de água de chuva em edifícios escolares. In: SIMPÓSIO BRASILEIRO DE RECURSOS HÍDRICOS, 20., 2013, Bento Gonçalves. Atas… Porto Alegre: ABRH, 2013. 8 p.

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