Ultrafiltration of municipal wastewater: study on fouling models and fouling mechanisms

Ultrafiltration (UF) with hollow fiber membranes is a proven membrane technique that can achieve high water quality standards as a tertiary treatment in municipal wastewater treatment plants. However, UF has a major drawback, membrane fouling, which causes losses of productivity and increases operation costs. Thus, the aim of this work is to model membrane fouling in the UF of a secondary treatment effluent. The tests were carried out with a model wastewater solution that consisted of bovine serum albumin and dextran. Three different transmembrane pressures and three different crossflow velocities were tested. Several fouling models available in the literature, and new models proposed, were fitted to permeate flux decline experimental data. The models studied by other authors and considered in this study were: Hermia s models (complete, intermediate, standard pore blocking and gel layer) and Belfort s model. The new models proposed in this work were: modified Belfort s model, quadratic exponential model, logarithmic inversed model, double exponential model and tangent inversed model. The fitting accuracy of the models was determined in terms of the R-squared and standard deviation. The results showed that the model that had the higher fitting accuracy was the logarithmic inversed model. Among the Hermia s models, the model that had the higher fitting accuracy was the intermediate pore blocking model. Therefore, the predominant fouling mechanism was determined and it was the intermediate pore blocking modelThe authors wish to gratefully acknowledge the financial support of the Generalitat Valenciana through the project "Ayudas para la realizacion de proyectos I+D para grupos de investigacion emergentes GV/2013".Soler Cabezas, JL.; Tora Grau, M.; Vincent Vela, MC.; Mendoza Roca, JA.; Martínez Francisco, FJ. (2014). Ultrafiltration of municipal wastewater: study on fouling models and fouling mechanisms. Desalination and Water Treatment. 1-11. doi:10.1080/19443994.2014.969320S111Gadani, V., Irwin, R., & Mandra, V. (1996). Ultrafiltration as a tertiary treatment: Joint research program on membranes. Desalination, 106(1-3), 47-53. doi:10.1016/s0011-9164(96)00091-4Illueca-Muñoz, J., Mendoza-Roca, J. A., Iborra-Clar, A., Bes-Piá, A., Fajardo-Montañana, V., Martínez-Francisco, F. J., & Bernácer-Bonora, I. (2008). Study of different alternatives of tertiary treatments for wastewater reclamation to optimize the water quality for irrigation reuse. Desalination, 222(1-3), 222-229. doi:10.1016/j.desal.2007.01.157Muthukumaran, S., Jegatheesan, J. V., & Baskaran, K. (2013). Comparison of fouling mechanisms in low-pressure membrane (MF/UF) filtration of secondary effluent. Desalination and Water Treatment, 52(4-6), 650-662. doi:10.1080/19443994.2013.826324Delgado, S., Dı́az, F., Vera, L., Dı́az, R., & Elmaleh, S. (2004). Modelling hollow-fibre ultrafiltration of biologically treated wastewater with and without gas sparging. Journal of Membrane Science, 228(1), 55-63. doi:10.1016/j.memsci.2003.09.011Qin, J.-J., Oo, M. H., Lee, H., & Kolkman, R. (2004). Dead-end ultrafiltration for pretreatment of RO in reclamation of municipal wastewater effluent. Journal of Membrane Science, 243(1-2), 107-113. doi:10.1016/j.memsci.2004.06.010Konieczny, K. (1998). Disinfection of surface and ground waters with polymeric ultrafiltration membranes. Desalination, 119(1-3), 251-258. doi:10.1016/s0011-9164(98)00166-0Madaeni, S. S., Fane, A. G., & Grohmann, G. S. (1995). Virus removal from water and wastewater using membranes. Journal of Membrane Science, 102, 65-75. doi:10.1016/0376-7388(94)00252-tArnal Arnal, J. M., Sancho Fernández, M., Martín Verdú, G., & Lora García, J. (2001). Design of a membrane facility for water potabilization and its application to Third World countries. Desalination, 137(1-3), 63-69. doi:10.1016/s0011-9164(01)00205-3Arévalo, J., Garralón, G., Plaza, F., Moreno, B., Pérez, J., & Gómez, M. Á. (2009). Wastewater reuse after treatment by tertiary ultrafiltration and a membrane bioreactor (MBR): a comparative study. Desalination, 243(1-3), 32-41. doi:10.1016/j.desal.2008.04.013Katsoufidou, K., Yiantsios, S. G., & Karabelas, A. J. (2008). An experimental study of UF membrane fouling by humic acid and sodium alginate solutions: the effect of backwashing on flux recovery. Desalination, 220(1-3), 214-227. doi:10.1016/j.desal.2007.02.038Muthukumaran, S., Nguyen, D. A., & Baskaran, K. (2011). Performance evaluation of different ultrafiltration membranes for the reclamation and reuse of secondary effluent. Desalination, 279(1-3), 383-389. doi:10.1016/j.desal.2011.06.040Henderson, R. K., Subhi, N., Antony, A., Khan, S. J., Murphy, K. R., Leslie, G. L., … Le-Clech, P. (2011). Evaluation of effluent organic matter fouling in ultrafiltration treatment using advanced organic characterisation techniques. Journal of Membrane Science, 382(1-2), 50-59. doi:10.1016/j.memsci.2011.07.041Xiao, D., Li, W., Chou, S., Wang, R., & Tang, C. Y. (2012). A modeling investigation on optimizing the design of forward osmosis hollow fiber modules. Journal of Membrane Science, 392-393, 76-87. doi:10.1016/j.memsci.2011.12.006Kaya, Y., Barlas, H., & Arayici, S. (2011). Evaluation of fouling mechanisms in the nanofiltration of solutions with high anionic and nonionic surfactant contents using a resistance-in-series model. Journal of Membrane Science, 367(1-2), 45-54. doi:10.1016/j.memsci.2010.10.037Amin Saad, M. (2004). Early discovery of RO membrane fouling and real-time monitoring of plant performance for optimizing cost of water. Desalination, 165, 183-191. doi:10.1016/j.desal.2004.06.021Yu, C.-H., Fang, L.-C., Lateef, S. K., Wu, C.-H., & Lin, C.-F. (2010). Enzymatic treatment for controlling irreversible membrane fouling in cross-flow humic acid-fed ultrafiltration. Journal of Hazardous Materials, 177(1-3), 1153-1158. doi:10.1016/j.jhazmat.2010.01.022Gao, W., Liang, H., Ma, J., Han, M., Chen, Z., Han, Z., & Li, G. (2011). Membrane fouling control in ultrafiltration technology for drinking water production: A review. Desalination, 272(1-3), 1-8. doi:10.1016/j.desal.2011.01.051Jayalakshmi, A., Rajesh, S., & Mohan, D. (2012). Fouling propensity and separation efficiency of epoxidated polyethersulfone incorporated cellulose acetate ultrafiltration membrane in the retention of proteins. Applied Surface Science, 258(24), 9770-9781. doi:10.1016/j.apsusc.2012.06.028Qu, F., Liang, H., Wang, Z., Wang, H., Yu, H., & Li, G. (2012). Ultrafiltration membrane fouling by extracellular organic matters (EOM) of Microcystis aeruginosa in stationary phase: Influences of interfacial characteristics of foulants and fouling mechanisms. Water Research, 46(5), 1490-1500. doi:10.1016/j.watres.2011.11.051Wang, C., Li, Q., Tang, H., Yan, D., Zhou, W., Xing, J., & Wan, Y. (2012). Membrane fouling mechanism in ultrafiltration of succinic acid fermentation broth. Bioresource Technology, 116, 366-371. doi:10.1016/j.biortech.2012.03.099Zator, M., Ferrando, M., López, F., & Güell, C. (2007). Membrane fouling characterization by confocal microscopy during filtration of BSA/dextran mixtures. Journal of Membrane Science, 301(1-2), 57-66. doi:10.1016/j.memsci.2007.05.038Sheng, G.-P., Yu, H.-Q., & Li, X.-Y. (2010). Extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems: A review. Biotechnology Advances, 28(6), 882-894. doi:10.1016/j.biotechadv.2010.08.001Nguyen, S. T., & Roddick, F. A. (2011). Chemical cleaning of ultrafiltration membrane fouled by an activated sludge effluent. Desalination and Water Treatment, 34(1-3), 94-99. doi:10.5004/dwt.2011.2790Xiao, K., Wang, X., Huang, X., Waite, T. D., & Wen, X. (2009). Analysis of polysaccharide, protein and humic acid retention by microfiltration membranes using Thomas’ dynamic adsorption model. Journal of Membrane Science, 342(1-2), 22-34. doi:10.1016/j.memsci.2009.06.016Suh, C., Lee, S., & Cho, J. (2013). Investigation of the effects of membrane fouling control strategies with the integrated membrane bioreactor model. Journal of Membrane Science, 429, 268-281. doi:10.1016/j.memsci.2012.11.042Duclos-Orsello, C., Li, W., & Ho, C.-C. (2006). A three mechanism model to describe fouling of microfiltration membranes. Journal of Membrane Science, 280(1-2), 856-866. doi:10.1016/j.memsci.2006.03.005Davis, R. H. (1992). Modeling of Fouling of Crossflow Microfiltration Membranes. Separation and Purification Methods, 21(2), 75-126. doi:10.1080/03602549208021420Bhattacharjee, S., & Bhattacharya, P. K. (1992). Flux decline behaviour with low molecular weight solutes during ultrafiltration in an unstirred batch cell. Journal of Membrane Science, 72(2), 149-161. doi:10.1016/0376-7388(92)80195-pMallubhotla, H., & Belfort, G. (1996). Semiempirical Modeling of Cross-Flow Microfiltration with Periodic Reverse Filtration. Industrial & Engineering Chemistry Research, 35(9), 2920-2928. doi:10.1021/ie950719tSalahi, A., Abbasi, M., & Mohammadi, T. (2010). Permeate flux decline during UF of oily wastewater: Experimental and modeling. Desalination, 251(1-3), 153-160. doi:10.1016/j.desal.2009.08.006Field, R. W., Wu, D., Howell, J. A., & Gupta, B. B. (1995). Critical flux concept for microfiltration fouling. Journal of Membrane Science, 100(3), 259-272. doi:10.1016/0376-7388(94)00265-zVincent Vela, M. C., Álvarez Blanco, S., Lora García, J., & Bergantiños Rodríguez, E. (2009). Analysis of membrane pore blocking models adapted to crossflow ultrafiltration in the ultrafiltration of PEG. Chemical Engineering Journal, 149(1-3), 232-241. doi:10.1016/j.cej.2008.10.027Hasan, A., Peluso, C. R., Hull, T. S., Fieschko, J., & Chatterjee, S. G. (2013). A surface-renewal model of cross-flow microfiltration. Brazilian Journal of Chemical Engineering, 30(1), 167-186. doi:10.1590/s0104-66322013000100019ANG, W., & ELIMELECH, M. (2007). Protein (BSA) fouling of reverse osmosis membranes: Implications for wastewater reclamation. Journal of Membrane Science, 296(1-2), 83-92. doi:10.1016/j.memsci.2007.03.018Muthukumaran, S., & Baskaran, K. (2013). Comparison of the performance of ceramic microfiltration and ultrafiltration membranes in the reclamation and reuse of secondary wastewater. Desalination and Water Treatment, 52(4-6), 670-677. doi:10.1080/19443994.2013.826333Tasselli, F., Cassano, A., & Drioli, E. (2007). Ultrafiltration of kiwifruit juice using modified poly(ether ether ketone) hollow fibre membranes. Separation and Purification Technology, 57(1), 94-102. doi:10.1016/j.seppur.2007.03.007Chung, T.-S., Qin, J.-J., & Gu, J. (2000). Effect of shear rate within the spinneret on morphology, separation performance and mechanical properties of ultrafiltration polyethersulfone hollow fiber membranes. Chemical Engineering Science, 55(6), 1077-1091. doi:10.1016/s0009-2509(99)00371-1Swaminathan, T., Chaudhuri, M., & Sirkar, K. K. (1979). Anomalous flux behavior in initial time stirred protein ultrafiltration through partially permeable membranes. Journal of Applied Polymer Science, 24(6), 1581-1585. doi:10.1002/app.1979.070240620Ahmad, A. L., & Hairul, N. A. H. (2009). Protein–membrane interactions in forced-flow electrophoresis of protein solutions: Effect of initial pH and initial ionic strength. Separation and Purification Technology, 66(2), 273-278. doi:10.1016/j.seppur.2008.12.027Gu, Z. (2007). Across-sample Incomparability of R2s and Additional Evidence on Value Relevance Changes Over Time. Journal of Business Finance & Accounting, 34(7-8), 1073-1098. doi:10.1111/j.1468-5957.2007.02044.xVincent, T., Parodi, A., & Guibal, E. (2008). Pt recovery using Cyphos IL-101 immobilized in biopolymer capsules. Separation and Purification Technology, 62(2), 470-479. doi:10.1016/j.seppur.2008.02.025Daufin, G., Merin, U., Labbé, J. P., Quémerais, A., & Kerhervé, F. L. (1991). Cleaning of inorganic membranes after whey and milk ultrafiltration. Biotechnology and Bioengineering, 38(1), 82-89. doi:10.1002/bit.260380111Daufin, G., Merin, U., Kerherve, F.-L., Labbe, J.-P., Quemerais, A., & Bousser, C. (1992). Efficiency of cleaning agents for an inorganic membrane after milk ultrafiltration. Journal of Dairy Research, 59(1), 29-38. doi:10.1017/s0022029900030211Morão, A., Nunes, J. C., Sousa, F., Amorim, M. T. P. de, Escobar, I. C., & Queiroz, J. A. (2009). Development of a model for membrane filtration of long and flexible macromolecules: Application to predict dextran and linear DNA rejections in ultrafiltration. Journal of Membrane Science, 336(1-2), 61-70. doi:10.1016/j.memsci.2009.03.007Ouammou, M., Tijani, N., Calvo, J. I., Velasco, C., Martín, A., Martínez, F., … Hernández, A. (2007). Flux decay in protein microfiltration through charged membranes as a function of pH. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 298(3), 267-273. doi:10.1016/j.colsurfa.2006.11.006Mohammadi, T., Kazemimoghadam, M., & Saadabadi, M. (2003). Modeling of membrane fouling and flux decline in reverse osmosis during separation of oil in water emulsions. Desalination, 157(1-3), 369-375. doi:10.1016/s0011-9164(03)00419-3Ng, C. Y., Mohammad, A. W., Ng, L. Y., & Jahim, J. M. (2014). Membrane fouling mechanisms during ultrafiltration of skimmed coconut milk. Journal of Food Engineering, 142, 190-200. doi:10.1016/j.jfoodeng.2014.06.005Mah, S.-K., Chuah, C.-K., Cathie Lee, W. P., & Chai, S.-P. (2012). Ultrafiltration of palm oil–oleic acid–glycerin solutions: Fouling mechanism identification, fouling mechanism analysis and membrane characterizations. Separation and Purification Technology, 98, 419-431. doi:10.1016/j.seppur.2012.07.020Said, M., Ahmad, A., Mohammad, A. W., Nor, M. T. M., & Sheikh Abdullah, S. R. (2015). Blocking mechanism of PES membrane during ultrafiltration of POME. Journal of Industrial and Engineering Chemistry, 21, 182-188. doi:10.1016/j.jiec.2014.02.023Amin, I. N. H. M., Mohammad, A. W., Markom, M., Peng, L. C., & Hilal, N. (2010). Analysis of deposition mechanism during ultrafiltration of glycerin-rich solutions. Desalination, 261(3), 313-320. doi:10.1016/j.desal.2010.04.01