PÓS-TRATAMENTO DE LIXIVIADO ESTABILIZADO POR CICLO COMPLETO, ADSORÇÃO E OXIDAÇÃO QUÍMICA.

The leachate from landfill has high concentrations of organic matter, humic and nitrogenous compounds, heavy metals and inorganic salts, which requires proper treatment for its final destination and does not cause damage to the environment. Studies show that the biologically treated effluent requires an association of physical-chemical techniques.This study aimed to evaluate the application of complementary techniques to the biological treatment such as coagulation-flocculation-sedimentation (CFS) and Fenton's reaction oxidation (FR), followed by adsorption. The CFS with ferric chloride and FR post-treatments isolated had 100% and 87,9%, organic matter correlated with true color removal and 53,6% and 67,0% of COD removal,which meet with the requirements of CONAMA 357/05 e 430/11 for disposal in water bodies. The adsorption after Fenton reaction resulted in 84,5% organic matter correlated with true color removal and 67,0% of COD removal. Adsorption after coagulationflocculation- sedimentation was able to reduce 76,9% of COD. CFS showed higher removal efficiency of organic matter correlated to the true color, while RF obtained higher removal efficiency of NKT, Nammoniacal and COD parameters. The biologically treated leachate did not show significant toxicity acute to the test organism saline artemia, however, after the post-treatment, acute ecotoxicity in the limits established by CEMA 81/10. [ABSTRACT FROM AUTHOR]