Processo de desinfecção por reator de algas dispersas (RAD) em efluente de filtro biológico percolador (FBP)

Abstract

The release of untreated household sewage into water bodies causes serious problems to the quality of life, as well as compromising the water supply of the population, in relation to the quality and availability of water. The use of polishing ponds as post-treatment and also effluent disinfection are widely recognized for their high capacity in the removal of nutrients, pathogens and organic pollutants. Therefore, the present study aimed to disinfection of pretreated effluent anaerobically by a UASB Reactor followed by a Percolator Biological Filter in Dispersed Algae Reactor (RAD). The system was built on bench scale, operating with a useful volume of 12 liters with internal lighting period of 24 hours. The Dispersed Algae Reactor performed well in the process of removing organic and inorganic constituents, as well as in the disinfection process. With satisfactory results regarding the removal of organic matter, nutrients such as phosphorus, ammoniacal nitrogen, nitrite, nitrate and reduction of pathogenic organisms, producing final effluent with sanitary quality that meets the release standards recommended by CONAMA Resolution 357/2005.