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RAINWATER QUALITY COLLECTED FROM DIFFERENT ROOF TYPES

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Author(s): Oberdan Everton Zerbinatti | Ivan Ulisses Lara de Sousa | Ademir José Pereira | Rosicler Aparecida de Oliveira Reinato

Journal: Engenharia Ambiental : Pesquisa e Tecnologia
ISSN 1678-2178

Volume: 8;
Issue: 3;
Start page: 019;
Date: 2011;
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Keywords: collection | re-utilization | water quality.

ABSTRACT
Re-utilization of water is a technique which aims to preserve a natural resource, seeking for an alternative that is capable of fulfilling the population’s demand while minding the needs of future generations. In such context, the re-utilization of rain water has been proving to be a viable alternative, as far as having sufficient water in feasible quality and quantity so as to fulfil daily demands is concerned. Water collecting and re-utilizing is an ancient technique performed for both home and agricultural-related aims. Such technique became less common as time went by, as the modern piped water systems became increasingly available. Nowadays, due to an increase in water needs, the alternative of re-utilization of water is being brought back and more often used. The number of industrial companies in the process of adapting to environmental laws and granting ISO 14000 certification is increasing. Such adaptations include rain water collecting and re-utilization. In states such as São Paulo and Rio de Janeiro laws oblige industrial companies with areas of 500 square meters or larger to collecting rain water, which not only aims at re-utilizing it but also at decreasing the risks of potential floods. In this context, this work aimed to assessing both the importance of rain water re-utilization and the problem of casual contamination of water by heavy metals which would render any re-use alternatives as not feasible, by carrying out chemical, physical and microbiological analyses. When comparing results, rain water featured higher quality.
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