Jaime Joaquim Da Silva Pereira Cabral,Dayana Andrade de Freitas,Anderson Luiz Ribeiro de Paiva,Tatiane Barbosa Veras, UFPE, Eng Civil, jcabral@ufpe.br
Abstract
Bank filtration performance has been tested in a tropical environment at Beberibe river at Olinda and Recife municipalities. In Bank Filtration (BF), a well is pumped near surface water, and induces water flow from the river through the porous medium to the well by percolation into the soil. Several physical, chemical and biological processes occurs, providing a natural water treatment along the river banks. The BF system in the Beberibe river comprises a production well and seven observation wells. By monitoring the water level of the river and piezometric groundwater levels, a hydraulic connection between river and aquifer has been verified. Results indicate that BF in Beberibe pilot project provide better water quality than river water, reaching drinking water condition. BF had positively tested for the removal of cyanobacteria. BF is a relatively low cost system, proven as an effective water treatment.
Keys-words: Bank Filtration, interactions stream-aquifer, water quality improvement.