SciELO - Scientific Electronic Library Online

vol.17 issue4-7Mathematical modeling of polystyrene particle size distribution produced by suspension polymerizationThe inclusion of surface characteristics in equations for turbulence closure author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383


PUGET, F.P.; MELO, M.V.  and  MASSARANI, G.. Wastewater treatment by flotation. Braz. J. Chem. Eng. [online]. 2000, vol.17, n.4-7, pp.407-414. ISSN 0104-6632.

This work deals with the performance analysis of a separation set-up characterized by the ejector-hydrocyclone association, applied in the treatment of a synthetic dairy wastewater effluent. The results obtained were compared with the results from a flotation column (cylindrical body of a hydrocyclone) operated both batch and continuously. As far as the experimental set-up studied in this work and the operating conditions imposed to the process, it is possible to reach a 25% decrease in the total effluent chemical oxygen demand (COD). This corresponds approximately to 60% of the COD of the material in suspension. The best results are obtained for ratios air flow rate-feed flow rate (Qair/QL) greater then 0.15 and for ratios underflow rate-overflow rate (Qu/Qo) lower than 1.0.

Keywords : flotation; ejectors; effluent treatment; dairy wastewater effluent.

        · text in English


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License