O efeito do tempo de ciclo de operação de filtração sobre a eficiência de wetlands.

Abstract

Despite the advances in technology in several areas, the problems of basic sanitation in Brazil are still notorious. The lack of sewage collection systems and treatment systems to meet the needs of the population make it very clear the need to seek efficient and lowcost alternatives for the treatment of domestic effluents. In this context, Built Wetlands systems technology has emerged as a viable option to help solve this problem. Therefore, this work evaluated the performance of a Built Wetlands system working in periods and cycles of 7-14 days and 3.5 / 4-7 days in control the pH and in the removal BOD5, COD and Ammoniacal Nitrogen in domestic effluents after passing for a pretreatment of a Sewage Treatment Plant. The results concluded that there is no significant difference in the efficiency of the wetlands operating time; the system in both phases removed the pollutants within the same range. However, it was evident that the technology is efficient when compared to the values of pollutant reduction to the raw sewage arriving at the station, that is, this system can be very well applied in the current scenario of the country