Dissolved-air flotation associated with an anaerobic reactor, as applied to sewage treatment
by M.A.P. Reali, R.G. Penetra, J.R. Campos
International Journal of Environment and Pollution (IJEP), Vol. 30, No. 2, 2007

Abstract: This paper presents the results of a study performed with a pilot sewage treatment plant consisting of an aerobic reactor followed by a flotation unit. To coagulate the anaerobic effluent, different ferric chloride dosages were applied by adopting two approaches: applying constant dosages during the essay and varying the dosages according to the anaerobic effluent turbidity. To obtain more than 95% TSS, 90% COD and 70% phosphorous removals a critical chemical ratio ranging 0.012-0.013 (in terms of Fe/Turbidity ratio) was required. When aiming higher phosphorous removal (above 95%) the required Fe/Turbidity ratio range rose to 0.016–0.018.

Online publication date: Thu, 26-Jul-2007

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