Hydrodynamic control of bioparticle deposition in a MBR applied to wastewater treatment
| Autor: | V Geaugey, J Manem, Alain Grasmick, E Tardieu |
|---|---|
| Přispěvatelé: | Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM) |
| Rok vydání: | 1998 |
| Předmět: |
Chromatography
Fouling Membrane reactor Chemistry Membrane fouling Filtration and Separation 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 6. Clean water Membrane technology Flux (metallurgy) Membrane Activated sludge Chemical engineering [CHIM]Chemical Sciences General Materials Science Sewage treatment Physical and Theoretical Chemistry 0210 nano-technology ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Journal of Membrane Science Journal of Membrane Science, Elsevier, 1998, 147 (1), pp.1-12. ⟨10.1016/S0376-7388(98)00091-X⟩ |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/s0376-7388(98)00091-x |
| Popis: | The study of fouling for tubular ceramic ultrafiltration (MWCO 300 kD) membranes during activated sludge filtration under constant flux conditions led to the experimental identification of two fouling processes: (1) At low recirculation velocity (0.5 m/s; Re ∼1200), sludge floc particles were deposited on the membrane surface and this cake layer provoked a very quick increase of hydraulic resistance (>10 9 m −1 s −1 ). (2) However, under the usual recirculation conditions (4 m/s; Re ∼9000), floc was not deposited. Filtration was stable for several days even with high fluxes (75–150 l/h m 2 ). Progressive membrane fouling resulted in a linear increase of transmembrane pressure over a certain time, and could be described by an increase in the hydraulic resistance, with d R /d t varying between 10 5 and 10 8 m −1 s −1 depending on hydrodynamic and biological conditions. Mechanism models (shear induced diffusion, inertial lift, surface transport) led to a very good qualitative description of these results, and revealed the major role of convective backtransport phenomena in fouling processes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect