Dematte, J. B IRodrigues, N. S.Saito, S. M TTornisielo, V. L.2014-05-272014-05-271987-12-01ENERG. NUCL. AGRIC., v. 8, n. 1-2, 1987.0100-3593http://hdl.handle.net/11449/63831Prototypes A (bidin + broken stones + gravel stones + gross sand + activated coal) and B (bidin + broken stones + gravel stones + gross sand) under hydraulic charge of 35 cm presented outlets that, when extrapolated for larger filters, are sufficient to supply small and medium irrigation projects for vegetables and fruits. (bidin = Rhodia polyester for drainage). Under a charge of 35 cm, filtrate of both prototypes presented a reduction of fecal coliforms, being this reduction higher for A prototypes, but, even in this case, the coliform quantities were superior to the legal limit. Under a decrease of the biochemical oxygen demand an increase of the available oxygen rate; pH and hardness did not present significant changes.porsurface waterfiltrationfruithigher plantland irrigationvegetablewater treatmentArtigoAcesso restrito2-s2.0-0023625682