Influence of roof type on the quality of rainwater collected in riverside communities
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.003.0029Keywords:
Rainfall, Drinking Water, EmissivityAbstract
The island region of Belém/PA is not assisted by the public water supply system, forcing its residents to consume inappropriate water from rivers or movetothe continental area to obtainem drinking water. Faced with this reality and considering the privileged rainfall regimes of the region,Caritas Metropolitana de Belém implemented rainwater harvesting microsystems. The objective of this work was to evaluate the influence of rainfall catchment (straw roof, clay and fiber cement) on the quality of rainwater intended for human consumption in riverside communities of Belém/PA. In 33 rainwater samples collected on clay, straw and fiber cement roofs, the following variables were evaluated: apparent color, turbidity, total dissolved solids, electrical conductivity, total hardness, alkalinity, pH and E.coli., the results were evaluated using descriptive statistics and compared with the Brazilian potability guidelines. All samples presented Values of TD and DT according to national legislation, however among the capture surfaces evaluated, the fiber cement roof presented the best levels of COR, TRB, STD and CE and better microbiological level as a function of its emissivity. All samples presented microbiological levels in disagreement with potability parameters, requiring the implementation of a disinfection system to make it suitable for human consumption.
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