New and practical mathematical model of membrane fouling in an aerobic submerged membrane bioreactor
| Autor: | Huu Hao Ngo, Yi Liu, Mst Fazana Rahman Zuthi, Siqing Xia, Jixiang Li, Jianxin Li, Wenshan Guo, Faisal I. Hai, Duc Long Nghiem |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Materials science Bioengineering 02 engineering and technology 010501 environmental sciences Membrane bioreactor 01 natural sciences Bioreactors Bioreactor Pressure Waste Management and Disposal 0105 earth and related environmental sciences Suspended solids Mathematical model Fouling Renewable Energy Sustainability and the Environment Membrane fouling Environmental engineering Membranes Artificial General Medicine Models Theoretical 021001 nanoscience & nanotechnology Membrane Chemical engineering Biofilms Aeration 0210 nano-technology |
| Zdroj: | Bioresource technology. 238 |
| ISSN: | 1873-2976 |
| Popis: | This study aimed to develop a practical semi-empirical mathematical model of membrane fouling that accounts for cake formation on the membrane and its pore blocking as the major processes of membrane fouling. In the developed model, the concentration of mixed liquor suspended solid is used as a lumped parameter to describe the formation of cake layer including the biofilm. The new model considers the combined effect of aeration and backwash on the foulants’ detachment from the membrane. New exponential coefficients are also included in the model to describe the exponential increase of transmembrane pressure that typically occurs after the initial stage of an MBR operation. The model was validated using experimental data obtained from a lab-scale aerobic sponge-submerged membrane bioreactor (MBR), and the simulation of the model agreed well with the experimental findings. |
| Databáze: | OpenAIRE |
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