Avaliação da qualidade da água em reservatório influenciada pelas diferentes configurações de saída

Abstract

Water storage reservoirs are important elements of the building supply system, but the quality of stored water is not fully understood when we have different output configurations. Factors such as water stratification, temperature, inlet jet, circulation zones and water mixing within the reservoir may be directly linked to its quality. This work presents how the reservoir outlet configurations and their water retention time can influence the final water quality. For four different exits, analyzes of potability and water quality were carried out (in compliance of the ordinance of Ministry of Health No. 2914/2011) in different storage and circulation cycles of the water inside the reservoir and, in general, met the legal requirements. The best results were obtained for the water inlet configuration at the top of the reservoir and water outlet at the bottom of the reservoir opposite the inlet. It should be noted that the behavior of the flow and mixing of the reservoir, consequently of the water quality, is influenced by the location of the outlet, evidenced in this research by the turbidity difference and the demand for dissolved oxygen between the water of the entrance and the one of the proposed exits.