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Variaveis no processo de coagulação /floculacao/decantacao de lixiviados de aterros sanitarios urbanos

2012; Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi); Volume: 7; Issue: 2 Linguagem: Inglês

10.4136/ambi-agua.861

1980-993X

Victor Fernandes Bezerra Mello, Juliana Prazeres da Gama Abreu, Joelma Morais Ferreira, José Fernando Thomé Jucá, Maurı́cio Alves da Motta Sobrinho,

Advanced oxidation water treatment

The careless disposal of waste may generate tremendous environmental and social impacts. For the treatment of landfill leachate, biological and physic-chemical treatments are routinely used. Chemical precipitation using calcium hydroxide has been used with great effectiveness in treating effluent with high concentrations of organic compounds and heavy metals. The leachate used in this study was collected from a flow box of the Muribeca landfill, located in the city of Jaboatao Guararapes, PE. Commercial calcium hydroxide was used as coagulant in aqueous solution. The experiment was implemented using a fractional factorial design, followed by a complete planning 24. It was observed that the lowest turbidity and color were obtained at the highest flocculation speeds. Color removal was favored by long flocculation time whereas this did not occur for turbidity removal. For the optimal point, a reduction of 52% of the color and a NTU turbidity within the standards established in Brazilian Laws (CONAMA 357/05 and CONAMA 430/11) were obtained.