In this work, we address the mechanical response of the flat sheet polymeric water treatment membranes under the assumed operational loading conditions. Firstly, we perform quasi-static analyses of the membranes under normal pressure loads, which is the condition that resembles the actual loading for flat sheet membranes in the submerged membrane bioreactors. Then, the long-term deformation of the membranes is studied under the assumed filtration durations for the same loading conditions by utilizing the viscoelastic material models. The quasi-static and viscoelastic membrane simulations are performed by a commercial finite element code ANSYS. Finally, the mechanical fatigue life predictions are carried out based on the stress distributions from the quasi-static analyses and the long-term effects from the viscoelastic analyses.
Citation: Murat Ozdemir, Selda Oterkus, Erkan Oterkus, Islam Amin, Abdel-Hameed El-Aassar, Hosam Shawky. Mechanical analyses of flat sheet water treatment membranes[J]. AIMS Materials Science, 2022, 9(6): 863-883. doi: 10.3934/matersci.2022052
In this work, we address the mechanical response of the flat sheet polymeric water treatment membranes under the assumed operational loading conditions. Firstly, we perform quasi-static analyses of the membranes under normal pressure loads, which is the condition that resembles the actual loading for flat sheet membranes in the submerged membrane bioreactors. Then, the long-term deformation of the membranes is studied under the assumed filtration durations for the same loading conditions by utilizing the viscoelastic material models. The quasi-static and viscoelastic membrane simulations are performed by a commercial finite element code ANSYS. Finally, the mechanical fatigue life predictions are carried out based on the stress distributions from the quasi-static analyses and the long-term effects from the viscoelastic analyses.
| [1] | Judd S (2010) MBR Book, 2Eds., Oxford: Butterworth-Heinemann. |
| [2] | Madaeni SS, Ghaemi N, Rajabi H (2015) Advances in polymeric membranes for water treatment, Advances in Membrane Technologies for Water Treatment, Cambridge: Woodhead Publishing, 3–41. |
| [3] | Childress AE, Le-Clech P, Daugherty JL, et al. (2005) Mechanical analysis of hollow fiber membrane integrity in water reuse applications. Desalination 180: 5–14. |
| [4] | Wang K, Abdalla AA, Khaleel MA, et al. (2017) Mechanical properties of water desalination and wastewater treatment membranes. Desalination 401: 190–205. |
| [5] | Ejaz Ahmed F, Lalia B, Hilal N, et al. (2014) Underwater superoleophobic cellulose/electrospun PVDF-HFP membranes for efficient oil/water separation. Desalination 344: 48–54. |
| [6] | Hou D, Wang J, Sun X, et al. (2012) Preparation and properties of PVDF composite hollow fiber membranes for desalination through direct contact membrane distillation. J Membrane Sci 405: 185–200. |
| [7] | Hong J, He Y (2012) Effects of nano sized zinc oxide on the performance of PVDF microfiltration membranes. Desalination 302: 71–79. |
| [8] | Chartoff RP, Menczel JD, Dillman SH (2008) Dynamic mechanical analysis (DMA), In: Menczel JD, Prime RB, Thermal Analysis of Polymers: Fundamentals and Applications, John Wiley & Sons. |
| [9] | Chung TS, Qin JJ, Gu J (2000) Effect of shear rate within the spinneret on morphology, separation performance and mechanical properties of ultrafiltration polyethersulfone hollow fiber membranes. Chem Eng Sci 55: 1077–1091. |
| [10] | Lalia BS, Guillen-Burrieza E, Arafat HA, et al. (2013) Fabrication and characterization of polyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP) electrospun membranes for direct contact membrane distillation. J Membrane Sci 428: 104–115. |
| [11] | Mackin TJ, Vernon PJ, Matthew RB (2004) Fatigue testing of polymer membranes. Polym Composite 25: 442–450. |
| [12] | Hartinger M, Napiwotzki J, Schmid EM, et al. (2020) Influence of spacer design and module geometry on the filtration performance during skim milk microfiltration with flat sheet and spiral-wound membranes. Membranes 10: 57. |
| [13] | Aerts PEM, Backwash efficiency in IPC® membrane modules for MBR, 2019. Available from: https://www.linkedin.com/pulse/backwash-efficiency-ipc-membrane-modules-mbr-peter-e-m-aerts/. |
| [14] | ANSYS Inc, 2018. ANSYS mechanical APDL basic analysis guide. |
| [15] | Emori K, Miura T, Kishida H, et al. (2019) Creep deformation behavior of polymer materials with a 3D random pore structure: Experimental investigation and FEM modeling. Polym Test 80: 106097. |
| [16] | ANSYS Inc., 2018. ANSYS mechanical APDL material reference. |
| [17] | MATLAB, Curve Fitting Toolbox. Mathworks, 2022. Available from: https://uk.mathworks.com/products/curvefitting.html. |
| [18] | Tng KH (2018) Mechanical failure in potable reuse plants: Component and system relibality considerations[PhD Thesis]. University of New South Wales, Sydney. |
| [19] | Solvay, 2018. Solef PVDF design and processing guide. Solef-PVDF-Design-and-Processing-Guide_EN-v2.7_0.pdf |
| [20] | Fane AG (2008) Submerged membranes, Advanced Membrane Technology and Applications, New Jersey: Jonh Wiley & Sons, 239–270. |
| [21] | ANSYS Inc., 2018. ANSYS mechanical APDL structural analysis guide. |
Figures(17) / Tables(2)
Murat Ozdemir, Selda Oterkus, Erkan Oterkus, Islam Amin, Abdel-Hameed El-Aassar, Hosam Shawky. Mechanical analyses of flat sheet water treatment membranes[J]. AIMS Materials Science, 2022, 9(6): 863-883. doi: 10.3934/matersci.2022052
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