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Mitigation of Membrane Fouling in Microfiltration by Ozone Pretreatment: A Comparative Study on Flux Recovery, Fouling Reversibility, and Cake Layer Morphology | ||
| Chemical Process Design | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 29 شهریور 1405 | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22111/cpd.2026.55413.1089 | ||
| نویسندگان | ||
| Mahdi Elyasi Kojabad* 1؛ Heidar Jafari2 | ||
| 1Department of Chemical Engineering, Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran. | ||
| 2Persian Gulf Bidboland Gas Treating Company, Behbahan 63661-16314, Iran. | ||
| چکیده | ||
| Membrane fouling remains the primary operational bottleneck limiting the efficiency of microfiltration (MF) processes in water treatment. This study introduces ozonation as a chemical pretreatment strategy to mitigate fouling in a custom-fabricated ceramic MF membrane. An alumina-based membrane with a peak pore size of 350 nm was successfully fabricated via gel-casting and characterized using FESEM and FTIR, revealing a homogeneous microstructure with a narrow pore size distribution. The integrated ozone-MF (O3-MF) system was evaluated using surface water from the Maroon River. The membrane showed an initial pure water flux of 1100 L.m-2.h-1. In the absence of ozone, rapid and irreversible flux decline occurred, with hydraulic backwashing failing to restore performance. With ozone pretreatment, the membrane exhibited improved flux stability, achieving near-complete flux recovery after each backwash cycle. Based on these flux recovery data and visual observation of the membrane surface, ozonation appeared to alter the fouling layer characteristics, resulting in a less compact and more hydraulically reversible deposit compared to operation without ozone. The O₃-MF system also achieved 71% turbidity reduction, reduced total coliforms and E. coli to below the detection limit of the analytical method (<1.1 MPN/100 mL), and reduced the Silt Density Index (SDI) from 0.25 to below detectable limits, indicating improved effluent quality for downstream applications. These results suggest that the integration of ozonation with MF separation offers an effective low-pressure pretreatment strategy for enhancing membrane operational stability and reducing cleaning frequency. | ||
| کلیدواژهها | ||
| Microfiltration؛ Membrane fouling؛ Ozonation؛ Ceramic membrane | ||
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