Avaliação da eficiência do capim vetiver na remoção de nutrientes em lagoas de tratamento de efluente industrial

Abstract

The search for new technologies and optimization of processes for the treatment of wastewater is essential to cover the most varied situations of location and availability of resources combined with environmental protection. Aiming at preserving the quality of water resources coupled with economic development. The treatment of effluents by phytoremediation has meeting this need. The assessment of efficiency in remove nutrientes of grass Vetiver hydroponic in hybrid system with the facultative pond of wastewater treatment from a dairy industry is the purpose of this study. The Vetiver System was inserted into the pond in pallet rafts. The plants had 50 days of development, with 21plants.m-2 density. The experiment assess monthly the parameters of total nitrogen, total phosphorus, chemical oxygen demand, pH, dissolved oxygen and 17 temperature of the effluent. The results corresponding to 90 days of vegetative growth, reaching 0.70 m high leaf mass and only 0.20 m of root system. The assessment indicates an improvement of pH and total phosphorus parameters, especially for the last evaluation period, where we observed excellent plant growth. This project will be followed up to obtain a vigorous root system. The efficiency of Vetiver hydroponic system depends on their stage of development, and in this case also suffers the influence of the flow and characteristics of the effluent and climate changes. All these factors will provide further assessment in real conditions, the Vetiver system.