Role of backpulsing in fouling minimization in crossflow filtration with ceramic membranes |
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| Affiliation: | 1. Membrane Science, Engineering and Technology Center and Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309-0427, USA;2. Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309-0596, USA;1. University of Johannesburg, Faculty of Science, Department of Applied Chemistry, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa;2. University of Swaziland, Faculty of Science Department of Chemistry, Kwaluseni Campus, Private Bag 4, Kwaluseni M201, Swaziland;3. University of South Africa, Nanotechnology and Water Sustainability Research Unit, College of Engineering, Science and Technology, Florida Science Campus, Roodepoort, South Africa;4. Ghent University, Faculty of Bioscience Engineering, Department of Applied Analytical and Physical Chemistry, Coupure Links 653, B-9000 Ghent, Belgium;1. Department of Chemical Engineering, Faculty of Engineering Technology Al-Balqa Applied University, P.O. Box 15008, 11134, Amman, Jordan;2. Water Authority of Jordan, Laboratories and Quality Affairs, Environmental Isotope Section, Amman, Jordan;1. Gas Processing Center, Qatar University, PO Box 2713, Doha, Qatar;2. Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar;3. Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar;4. Department of Chemical Engineering, Qatar University, PO Box 2713, Doha, Qatar;5. Cranfield University, Cranfield, Beds, MK43 0AL, UK;1. LEQUIA, Institute of the environment, University of Girona, Campus Montilivi, Girona, Spain;2. UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Australia;3. Ghent University, Faculty of Bioscience Engineering, Department of Applied Analytical and Physical Chemistry, Particle and Interfacial Technology Group (PaInT), Coupure Links 653, B-9000 Gent, Belgium |
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| Abstract: | Effect of backpulsing on crossflow filtration of different process streams was studied. Laboratory scale experiments were conducted with synthetic electroplating wastewater containing Cr(OH)3 suspension. Porous ceramic membranes of various pore sizes (0.05–5.0 μm) were evaluated. Filtration experiments with and without backpulsing show that backpulsing is effective in minimizing membrane fouling. Up to five-fold increase in steady-state permeate flux and 100% flux recovery were observed. Theoretical aspects are reviewed to develop a better understanding of the critical parameters associated with high-pressure backpulsing.Pilot and commercial scale operating results on several industrial applications, such as yeast filtration, process slurry filtration and oily wastewater filtration are presented. Data analysis shows the critical importance of backpulsing in reducing long-term membrane fouling while allowing the realization of high product recovery. Optimization of process parameters with backpulsing typically results in higher flux and reduces the total capital cost required to achieve the desired production rate. |
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