Michelan DG, Sens ML, Dalsasso RL. Comparison on the duration of career between slow sand filter with conventional cleaning and backwashed slow sand filter. Sci. Plena [Internet]. 2015 Nov. 14 [cited 2024 Aug. 24];11(11). Available from: https://scientiaplena.emnuvens.com.br/sp/article/view/2646