Incorporation of nitrogen and phosphorus in the leaves of Typha domingensis Pers. macrophyte during treat dairy cattle wastewater in constructed wetlands

ABSTRACT

The objective of this study was to evaluate the performance of macrophyte Typha domingensis Pers. in different development stages in the nitrogen and phosphorus removal from a horizontal flow constructed wetland (WCH) applied for dairy cattle wastewater treatment. In this way, growth, nitrogen and phosphorus levels in the leaf tissue of macrophytes were monitored during a 120-day growth period. Typha domingensis Pers. macrophyte was responsible for a mean removal of 5.12 and 3.16% of the applied loads in the WCH, for nitrogen and phosphorus, respectively. The higher nutriens removal rates (30.2 and 6.4 g P kg^-1) were identified when the higher tissue growth rates occurred (24.17 cm week^-1).

Keywords:
constructed wetland; nitrogen; phosphorus; growth rate