Avaliação da capacidade de fitorremediação de um sistema de jardins flutuantes em lagoas de estabilização.

Abstract

The study in question was developed at the Sewage Treatment Station of the city of Campina Grande - PB, in order to develop a system of floating gardens with an efficient and adequate structure to evaluate its capacity to remediate the effluent of the stabilization pond in terms of the parameters pH, turbidity, BOD, COD and Chlorophyll-a, as well as to verify the adaptability of local plants to the system. The floating gardens have support structure made of Styrofoam, as well as a mixed substrate of sugarcane fiber, coconut fiber, crushed Styrofoam and gravel, which are supported by a net. The plants used in the gardens were: Papyrus (Cyperus papyrus), Coração-roxo (Tradescantia zebrina), Basket plant (Callisia fragrans), Biri / Cana da India (Canna x generalis) and Taioba (Xanthosoma sagittifolium). Effluent samples were collected and compared throughout the treatment prior to system installation and weekly for the first five weeks after installation. The analysis were carried out at the Sanitation Laboratory of the Federal University of Campina Grande, following the methodology of the Standard Methods for the Examination of Water and Wastewater. At the end of the monitoring, the structure of the gardens was very efficient and resistant and most of the species of plants used adapted well to the system. The floating gardens presented good results of reductions of the BOD and COD and stabilization of the pH, turbidity and concentration of Chlorophyll-a.