Removal of motor oil by continuous multistage froth flotation: Effect of operational parameters |
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| Authors: | P Kanokkarn T Shiina T Suttikul S Chavadej |
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| Affiliation: | 1. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, Thailandsumaeth.c@chula.ac.th;3. Faculty of Horticulture, Graduate School of Horticulture, Chiba University, Chiba, Japan;4. National Food Research Institute, National Agriculture and Food Research Organization, Ibaraki, Japan;5. Division of Chemical Process Engineering Technology, Faculty of Engineering and Technology, King Mongkut’s University of Technology North Bangkok (Rayong Campus), Rayong, Thailand;6. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, Thailand;7. Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, Thailand |
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| Abstract: | A continuous multistage froth flotation column was employed to remove motor oil from water at a low concentration (500 mg/L) using an extended surfactant – branched alcohol propoxylate sulphate sodium salt (C14-15–8PO–SO4–Na) – as a frother. The highest separation efficiency (97% motor oil removal with the enrichment ratio of 16 for motor oil) was obtained at a foam height of 60 cm, an air flow rate of 40 L/min, a feed flow rate of 60 mL/min, a surfactant concentration of 0.3% (w/v), and an NaCl concentration of 1.5% (w/v). The process performance increased with increasing tray number but beyond 4 trays, the system could only offer lower concentrations of motor oil and surfactant in the effluent. |
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| Keywords: | Multistage froth flotation motor oil removal extended surfactant |
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