Caracterização das águas de lavagem dos filtros de uma estação de tratamento de água: estudo de caso na ETA Gavião- CE.

Abstract

Water is a scarce resource in the northeast region of Brazil. With that, the search for technologies that avoid the waste is a necessity. The Water Treatment Plant (WTP) of Gavião, located in Pacatuba-CE, is responsible for supplying the cities of Fortaleza, Eusébio and Maracanaú. The WTP has a water reuse system of washing filters responsible for over 600.000 cubic meter per month returned to the treatment system and with a loss of 450.000.cubic meter per month. The present study sought through a case study, demonstrate the operational procedures of descendants filters of the WTP of Gavião-CE. Through the collection of data provided by the Company of water and sewer of Ceará (CAGECE), in the period of 1 year, quantitative and qualitative analyses were undertaken. The quantitative analysis, was possible to analyze how this volume, previously lost by not owning a return system influences on the supply of other cities in almost their entirety. In the qualitative analysis, it was found that the quality of the waste water is better than the raw water, because the waste water is treated water collected in a pump station and directed to the filters in reverse flow of filtration flow. Finally, if the values were verified quality analysis were in accordance with the Consolidation Ordinance No. 5 of the Ministry of health.