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Vilela, P.A.D. Water reuse of Pinheiros river as recovering element of Billings reservoir [tese de doutorado]. São Paulo: Faculdade de Saúde Pública da USP;2009. Introduction A quality assessment of the water pumped from two experimental floating plants on the Pinheiros River into the Billings Reservoir, located in the Sao Paulo Metropolitan Region. Objective: To analyze quality parameters of the water pumped into the Billings Reservoir, scrutinizing both pollution and toxicity; with focus on the recreational use of the reservoir as well as generating energy at the Henry Borden Plant in the city of Cubatão. Methodology – For the quantitative research, secondary data was collected from August 22, 2007 to May 31, 2008 – the functioning period of the flotation systems. The data was gathered in conventional sampling points as well as pre-established continuous monitoring sampling points. Results The assessment has indicated that the first monitoring point inside the reservoir is affected by the pumping, however, this fact does not occur in distant points located in the reservoir’s central body. Some important pollutants such as lead and chloroform showed levels above allowed by law. Conclusion – Primary contact for Recreational reuse is not indicated for this reservoir; however, the water pumping for energy generation can be kept, since the water for this application must have low quantities of solids. Recommendation – Development of studies that assess both the resulting benefits of the Tiete River Clean-Up Project, implemented by The Sanitation Company of The State of Sao Paulo (SABESP), as well as Flotation Treatment System; Operational adjustments on Flotation System; Identify and eliminate underhand sewage discharged into the reservoir; Strict control of the occupied areas surrounding the Billings reservoir. Descriptors: reuse, flotation, reservoir, water quality.

Reúso de água do Rio Pinheiros como elemento de recuperação da Represa Billings