Resumo

FORERO, J. E; DIAZ, J  e  BLANDON, V. R. DISEÑO DE UN NUEVO SISTEMA DE FLOTACIÓN PARA TRATAMIENTO DE AGUAS INDUSTRIALES. C.T.F Cienc. Tecnol. Futuro [online]. 1999, vol.1, n.5, pp.67-75. ISSN 0122-5383.

The air flotation is a process of physical separation for the industrial wastewater treatment, that removes oils and suspended solids. Although methods different from flotation have been used in petroleum industry, their application is subjected to numerous operational and economic limitations. In this work some comparisons of these flotation techniques are discussed and, a new system for the treatment of residual waters by flotation is the developed. This system is the result of several years of research both in laboratory and in pilot plants. The new design uses characteristics from other techniques, it is based on a modification of a system of induced air flotation as to operate like a system of dissolved air flotation, which improves its performance at lower costs and reduces operational problems associated with equipment maintenance. The developed system has several characteristics that improve its operation, including the use of nozzles for gas injection and dispersion in the liquid phase. As opposed to conventional systems, there is no need to use motorized bubble generating equipment for each flotation cell, diminishing therefore power requirements.

Palavras-chave : flotation; water treatment; sewage; oily water; bubble size.

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