Park, Chanhyuk Lee, Young Haeng Lee, Sanghyup Hong, Seungkwan 2024-01-20T23:33:48Z 2024-01-20T23:33:48Z 2021-09-03 2008-03-01 0011-9164 https://pubs.kist.re.kr/handle/201004/133661 A series of reverse osmosis (RO) membrane filtration experiments was performed systematically in order to investigate the effects of various hydrodynamic and physicochemical operational parameters on a cake layer formation in colloidal and particulate suspensions. Bench-scale fouling experiments with a thin-film composite RO membrane were performed at various combinations of trans-membrane pressure (TMP), cross-flow velocity (CFV), particle size, pH, and ionic strength. In this study, silica particles with two different mean diameters of 0.1 and 3.0 mu m were used as model colloids. Membrane filtration experiments with colloidal suspensions under various hydrodynamic operating conditions resulted that more significant permeate flux decline was observed as TMP increased and CFV decreased, which was attributed to the higher accumulative mass of particles on the membrane surface. Results of fouling experiments under various physicochemical operating conditions demonstrated that the rate of flux decline decreased significantly with an increase of the ionic strength as well as particle size, while the flux decline rate did not vary when solution pH changed. The experimentally measured cake layer thickness increased with a decrease in particle size and solution ionic strength. Furthermore, the model estimation of cake layer thickness by using a cake filtration theory based on the hydraulic resistance of membrane and cake layer was performed under various ionic strength conditions. The primary model parameters including accumulated mass and specific cake resistance were calculated from the cake layer resistance. This result indicated that the formation of cake layer could be closely related with solution water chemistry. The model estimated cake layer thickness values were in good agreement with the experimentally measured values. English ELSEVIER SCIENCE BV MONTE-CARLO-SIMULATION PERMEATE FLUX DECLINE CROSS-FLOW FILTRATION CONCENTRATION POLARIZATION MODEL DEVELOPMENT PORE BLOCKAGE MICROFILTRATION DIFFUSION ULTRAFILTRATION PERFORMANCE Effect of cake layer structure on colloidal fouling in reverse osmosis membranes Article 10.1016/j.desal.2007.01.038 1 DESALINATION, v.220, no.1-3, pp.335 - 344 DESALINATION 220 1-3 335 344 scie scopus 000254024800032 2-s2.0-38349016917 Engineering, Chemical Water Resources Engineering Water Resources Article; Proceedings Paper MONTE-CARLO-SIMULATION PERMEATE FLUX DECLINE CROSS-FLOW FILTRATION CONCENTRATION POLARIZATION MODEL DEVELOPMENT PORE BLOCKAGE MICROFILTRATION DIFFUSION ULTRAFILTRATION PERFORMANCE cake layer thickness colloidal fouling cake filtration theory reverse osmosis