Protótipos de filtros para água poluida usada para irrigação de hortaliças e frutiferas
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Abstract
Prototypes 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.
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surface water, filtration, fruit, higher plant, land irrigation, vegetable, water treatment
Language
Portuguese
Citation
ENERG. NUCL. AGRIC., v. 8, n. 1-2, 1987.
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