Open AccessWastewater treatment by flotation
Author(s) -
F. P. Puget,
M. V. Melo,
G. Massarani
Publication year - 2000
Publication title -
brazilian journal of chemical engineering/brazilian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.313
H-Index - 52
eISSN - 1678-4383
pISSN - 0104-6632
DOI - 10.1590/s0104-66322000000400005
Subject(s) - hydrocyclone , arithmetic underflow , effluent , wastewater , volumetric flow rate , chemical oxygen demand , pulp and paper industry , environmental science , chemistry , environmental engineering , suspension (topology) , waste management , chromatography , engineering , mathematics , mechanics , computer science , physics , homotopy , pure mathematics , programming language
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/Q L) greater then 0.15 and for ratios underflow rate-overflow rate (Qu/Qo) lower than 1.0