2011-03-232011-03-232006-12-27LIMA, Rosete Ferreira de. Influência do leito de contato na eficiência de remoção de ferro de águas subterrâneas. Orientadora: Luiza Carla Girard Teixeira Machado. 2006. 199 f. Dissertação (Mestrado em Engenharia Civil) - Centro Tecnológico, Universidade Federal do Pará, Belém, 2006. Disponível em: http://www.repositorio.ufpa.br/jspui/handle/2011/1677. Acesso em:.http://www.repositorio.ufpa.br/jspui/handle/2011/1677The present work consisted on the evaluation of the acting of a Pilot Iron Removal Plant (IRP), regarding the presence or absence of contacting surface. The Pilot IRP is composed by an multiple tray aerator, a contact surface by ascending flow and a downflow rapid sand filter, sited at Federal University of Pará, using raw water from underground water deposits, containing high quantity of Iron, around 2mg/L, above the 0.3mg/L established on the 518/2004 law. During the monitoring two experimental phases were made, the first with the contact surface and the second without it, being adopted three filtration rates: 180m/mxday, 270m/mxday and 360m/mxday. In the experimental phases were appraised the following variables: pH, Color, Total Iron, Ferrous Iron and the turbidity. The efficiency of removal of total iron obtained for the rates of filtration of 180m/mxday, 270m/mxday and 360m/mxday with the contact surface was 93% to 94%, 85 % to 95% and 91% to 92%, respectively. Without the contact surface the efficiency of extracting of iron was around 91% to 93%, 91% to 93% and 88% to 93%, respectively. The filtration duration with contact surface for the rates of 180m/mxday, 270m/ mxday and 360m/mxday presented duration of 41h, 30h and 22,7h, respectively, while with the absence of contact surface the medium duration was of 16h, 12h and 4,7h respectively. In that way it can be concluded that the contact surface is an indispensable unit in a IRP, because it improves the system acting, producing effluent of good quality effluent and langers filtrat ons.Acesso AbertoÁguas subterrâneasLeito de contatoRemoção de ferroTaxas de filtraçãoFiltro rápido descendenteUnderground waterContact surfaceIron extractingFiltration ratesContact surfaceDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIASCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO BASICO::TECNICAS DE ABASTECIMENTO DA AGUA