Concentration of glycerol from dilute glycerol wastewater using sweeping gas membrane distillation |
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| Affiliation: | 1. National Research Council Institute on Membrane Technology (ITM-CNR), Via Pietro BUCCI, c/o The University of Calabria, Cubo 17C, 87036 Rende, CS, Italy;2. The University of Calabria, Department of Environmental and Chemical Engineering, Rende, CS, Italy;3. Hanyang University, WCU Energy Engineering Department, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea;4. Center of Excellence in Desalination Technology, King Abdulaziz University, Saudi Arabia;1. Technology Division Environment & Energy, Ingredient Business Unit, Daesang Co., Ltd., 208, Oehang -gil, Gunsan-si, Jeollabuk-do 54008, Republic of Korea;2. Civil Engineering Department, Kyungnam University, 7 Kyungnamdaehak-ro, Masanhappo-gu, Changwon, Gyeonsangnam-do 51767, Republic of Korea;3. School of Civil and Environmental Engineering, University of Technology Sydney, Post Box 129, Broadway, NSW 2007, Australia;1. Laboratoire Génie Civil Génie Mécanique, INSA de Rennes et Université de Rennes 1, France;2. Laboratoire d''Energétique Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop de Dakar, Sénégal;3. Institut des Sciences Chimiques de Rennes (UMR CNRS 6226), Université de Rennes 1, ENSCR, France |
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| Abstract: | In this work, experimental results for the concentration of dilute glycerol wastewater using membrane distillation (MD) with a microporous hydrophobic flat-sheet PTFE membrane are reported. Experiments were performed using the sweeping gas mode of the MD (SGMD) process. The effects of various operating variables, such as feed temperature, glycerol concentration in aqueous phase, feed flow rate and sweeping gas flow rate were studied. A Taguchi analysis has been performed on the experimental results which determined the effects and contribution of each of the factors on the distillate flux and the interactions between the operating variables. Results showed that the most influential factor was feed temperature. The second significant contribution was observed for the sweeping gas flow rate. Feed concentration had a negative effect on the distillate flux. At optimum conditions (i.e. 65 °C, 400 mL/min, 1 mass%, and 0.453 Nm3/h), the Taguchi model predicted the value of the response (the distillate flux) as 20.93 L/m2 h, which had good agreement with the experimental results. |
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| Keywords: | Sweeping gas membrane distillation SGMD Glycerol Distillate flux PTFE membrane Taguchi method |
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