Avaliação do efeito da condutividade na eletro-coagulação-flotação aplicada ao tratamento físico-químico de águas residuárias

Mário Luiz Rodrigues Foco; Francisco Javier Cuba Terán

doi:10.5433/1679-0375.2007v28n2p99

Condutivity effect in electro-coagulation-flotation applied to physico-chemical wastewater treatment

Authors

Mário Luiz Rodrigues Foco Universidade Estadual de Campinas
Francisco Javier Cuba Terán Universidade Estadual Paulista

DOI:

https://doi.org/10.5433/1679-0375.2007v28n2p99

Keywords:

Electro-coagulation-floatation, Wastewater treatment, Chemical coagulation.

Abstract

This study reports on the effect of conductivity on the simultaneous applicability of water electrolysis , chemical coagulation and flotation fundamentals in the treatment of wastewater with large amounts of suspended matter, characterizing electro-coagulation-flotation (ECF) . Results from experiments carried out in a pilot study implanted and operated in the Laboratory of Environment Control (LCA), at the State University of Campinas in Limeira are presented. ECF was developed in an electrolytic reactor where water passed through aluminum electrodes connected to a power supply. Electrochemical reactions promoted Al3+ ions emission from anode, neutralizing repulsive pollutant forces, forming flakes. An evolution of micro hydrogen bubbles occurred, carrying the flakes to the top of the solution, causing flotation and polluter removal. System monitoring aimed at reaching optimal operation conditions regarding time of liquid permanence in the reactor, influence of the NaC1 addition on the increase of affluent conductivity, and influence of polarity inversion over cathodic passivation. Results from carwash wastewater treatment reported 86% efficiency rate for color, 90,15% for turbidity and 85,43% for oil and axle-grease removal.

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Author Biographies

Mário Luiz Rodrigues Foco, Universidade Estadual de Campinas

Graduado em Tecnologia em Saneamento Ambiental, com ênfase em Saneamento Básico pela Universidade Estadual de Campinas. Aluno regular do Programa de Pós-graduação, nível Mestrado, em Engenharia Civil na área de concentração em Saneamento e Ambiente, também pela Unicamp. Tem experiência em pesquisa na área de Engenharia Sanitária em Tratamento de Águas de Abastecimento e Residuárias, atuando principalmente nos seguintes temas: eletro-coagulação-flotação, esgoto sanitário, reatores anaeróbios.

Francisco Javier Cuba Terán, Universidade Estadual Paulista

Licenciado em Engenharia Civil pela Universidad Mayor de San Andrés, grau revalidado pela Escola Politécnica da Universidade de São Paulo. Possui Mestrado e Doutorado em Engenharia Civil na área de Hidraulica e Saneamento pela Universidade de São Paulo e Pós-doutorado em Engenharia Urbana pela Universidade Federal de São Carlos. Atualmente é professor da Universidade Estadual Paulista Júlio de Mesquita Filho. Tem experiência na área de Engenharia Ambiental, com ênfase em monitoramento e controle da poluição hídrica e atmosférica.

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Published

2007-12-15

How to Cite

Foco, M. L. R., & Cuba Terán, F. J. (2007). Condutivity effect in electro-coagulation-flotation applied to physico-chemical wastewater treatment. Semina: Ciências Exatas E Tecnológicas, 28(2), 99–106. https://doi.org/10.5433/1679-0375.2007v28n2p99

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Issue

Vol. 28 No. 2 (2007)

Section

Original Article

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