Comparison of four physicochemical treatments for leachate treatment
Por:
Novelo, RIM, Borges, ERC, Riancho, MRS, Franco, CAQ, Vallejos, GG, Cisneros, BJ
Publicada:
1 ago 2009
Resumen:
Results from four physicochemical treatments applied to the leachate of a sanitary landfill of Merida, Mexico, are presented: coagulation-flocculation, flotation, adsorption and Fenton oxidation. Coagulation-flocculation and flotation processes consist on the removal of suspended particles by means of the addition of chemical substances (coagulants). Both processes were not efficient since the leachates treated had low suspended solids content. No successful applications of these treatments were found in literature since leachates from other landfills also have low suspended solids content, which explains the low efficiency of these treatments. In the leachates studied, most sizes of the suspended particles ranged from 0 to 75 mu m, with an average of 23 mu m, which correspond to color producing colloidal particles. Removal of these particles is carried out at low pH. For this reason, the best results obtained were 40% at pH < 2 for the coagulation-flocculation process, and 37 % at pH
Filiaciones:
Cisneros, BJ:
Univ Nacl Autonoma Mexico, Inst Ingn, Subdirecc Ingn Ambiental & Hidraul, Mexico City 04510, DF, Mexico
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