Fluxos de fósforo em sistema de leitos cultivados utilizando a espécie Vallisneria Gigantea.

Abstract

The inadequate release of sewers in the water courses can increase the shortage of the water resources in an area. The adoption of appropriate techniques for sewer treatment allows the maintainable use of those resources. Among these techniques stand out the system of cultivated beds - simple system that can contribute to the nutrient removal in the final phase of sewer treatment. The removal is accomplished from the plant installation in these beds. This work monitored phosphorus and nitrate removal from the sewers of the College of Agricultural Engineering, State University of Campinas-SP, from a system of cultivated beds, developed at this Institute. The analyzed bed was rectangular (2 m3) and it was cultivated with macrophyte of the gender Vallisneria Gigantea. They were monitored during ten days in January/ February 2006 (01/25; 01/26; 01/27; 01/28; 01/29; 01/30; 01/31; 02/01; 02/03 and 02/04), with inflow and outflow hourly collectings from the bed, as well as inflow and outflw volumetric measurements.