Julio Cesar Azevedo Luz De Lima,Felipe Henrique Borba Alves,Manuella Lopes Figueiras,Luis Medeiros de Lucena,Sylvana Melo dos Santos,Sávia Gavazza dos Santos Pessoa, UNIVERSIDADE FEDERAL DE PERNAMBUCO, LABORATÓRIO DE SANEAMENTO AMBIENTAL, JULIOCESARAZEVEDO@GMAIL.COM
Abstract
This work evaluates a water deviation device used to remove rainwater pollutants from a collection system formed by roof and pipes, before a cistern. The experiments were carried out during two rain events that had occurred, after a long period of drought (three months without rain). After pass throughout the collection system it was observed an increase in the values of some parameters in rainwater: turbidity, color, heterotrophic bacteria and fecal coliforms. Samples collected before and after the deviation system indicated that the device was efficient in reduce the turbidity (62,4% in 2009 and 49,6% in 2010), total coliforms (94,2% in 2009 and 93,8% in 2010) and heterotrophic bacteria (37,3% in 2009 and 44,8% in 2010). These results indicated that the automatic deviation of first rainwater have important role in avoiding cistern contamination.
Keywords: Cisterns, sanitary barriers, water quality.