Characterization of sludge generated in station tramento sewage ete chapecó / sc: preliminary results

Abstract

The sewage sludge can be a source of nutrients for diverse cultures; however, the concentrations of heavy metals and pathogens in its constitution can limit its use in agricultural ground. The objective of this work was to characterize the sludge generated in the station of treatment of effluent (ETE) of the city of Chapecó‐SC, in order to indicate one reuses appropriate for the same, mainly the agricultural recycling. Until the moment, four samplings had been carried through, being analyzed the following parameters: macronutrients, fertility, metals heavy and agents pathogenic. The analyzed heavy metals had been: Cr, Cu, Mn, Fe, Cd, Pb and Zn; being that the gotten texts of these elements meet well below of the values found in literature, what, the principle, indicates that they will not bring alterations of importance when of its application in the ground. The preliminary results of this study had pointed to the necessity of if carrying through the liming of the sludge of the station, that is, to add to whitewash with respect to correction of pH and reduction of the number of pathogens, therefore in accordance with the microbiological analyses the silt was classified as class B, according to resolution 375/06 of the CONAMA.