Resumen

RODRIGUEZ-MIRANDA, Juan Pablo; GOMEZ, Esteban; GARAVITO, Laura  y  LOPEZ, Francy. Comparative study of domestic wastewater treatments using common duckweed (Lemna minor) and water hyacint (Eichhornia crassipes) in artificial wetlands. Tecnol. cienc. agua [online]. 2010, vol.1, n.1, pp.59-68. ISSN 2007-2422.

This comparative study of domestic wastewater treatment using natural systems like artificial wetlands shows organic matter (BOD) removal rates between 70% and 86% using water hyacinth and of 58% using common duckweed. The artificial wetland system behaves hydraulically as a piston-flow model regardless of the aquatic plant used. During the experiment, it was observed that common duckweed contributes characteristic elements to water that increase the effluent's pH (> 11), whereas water hyacinth elevates the pH value in the range of 6-8, thus favoring the stabilization of the organic matter within the biological system.

Palabras llave : wetland; BOD₅; wastewater; Eichhornia; Lemna.

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