This study aimed to evaluate the removal of suspended and total solids in biofilters filled with composted waste, sugar cane bagasse and sawdust submitted to the application rates of domestic sewage of 0.5, 1.0 and 1.5 m³ m-2 d-1 in Viçosa-MG. An experimental test unit was set up in experimental area of the Federal University of Viçosa. The concentrations of suspended and total solids were determined monthly during a period of 153 days. The experiment was arranged in a split split plot design, with the application rates of domestic sewage in the plots, the types of organic material in the splitplots and evaluation period in the split-splitplots, in a completely randomized design with three replications. The results indicated that the biofilter provided removal of suspended and total solids up to 82 and 46% of the domestic waste after 153 days of operation, the sawdust was the type of filter that gave the best performance for the treatment of domestic waste, the application rates of domestic waste of 0.5, 1.0 and 1.5 m ³ m -2 d -1 showed no difference regarding the removal of suspended and total solids and the use of biofilters minimizes the clogging caused by suspended solids when using domestic waste in agriculture via drip irrigation system.
clean technology; wastewater; pollutants
