Rio Pirapozinho's self-depuration after the release of Sewage Treatment Plant's treated sewer

• Grant number: 12/15909-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): October 01, 2012
• Effective date (End): September 30, 2013
• Field of knowledge: Engineering - Sanitary Engineering - Water Resources
• Principal Investigator: Renata Ribeiro de Araújo
• Grantee: Bruno Frias Faga
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

The self-depuration is a process that happens in water bodies without any anthropic intervention in the area, in order to recover their initial state after a release of a toxic/polluted material. Thus, this research proposes to analyze the Rio Pirapozinho's self-depuration process after the release of Sewage Treatment Plant's treated sewer, using the Streeter & Phelps' water quality modeling (1925). According to the current legislation, this water body is a "Classe 2" river, located at Pirapozinho City (São Paulo, Brazil). The researchers will proceed in a way to do semimonthly sampling of six limnological variables in six river's sections, one of them upstream and four downstream, that will be used as control points. Those ones are going to be separated 100 m each and will be placed based of the Sewage Treatment Plant's pipe. The other point will be located at the Sewage Treatment Plant's pipe. It's important to highlight that will be done some samples of the sewer released by the Sewage Treatment Plant.