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Pilot plant study of a new rotating hollow fibre membrane module for improved performance of an anaerobic submerged MBR
- Ruigómez, Ignacio, Vera, Luisa, González, Enrique, Rodríguez-Sevilla, Juan
- Journal of membrane science 2016 v.514 pp. 105-113
- artificial membranes, filtration, fouling, membrane bioreactors, specific energy
- A new rotating hollow-fibre module has been designed in order to reduce membrane fouling in submerged anaerobic membrane bioreactors. Filtration performance under different permeate flux conditions was evaluated on a short-term pilot-scale basis. Results were compared with those obtained with a conventional gas-sparging module operating at similar specific energy demand. The experimental assessment of critical flux showed a 17–20% improvement with the membrane rotation. This technique not only reduced the fouling rate but also removed the fouling cake previously formed at the membrane. In sub-critical flux conditions, module rotation substantially extended cleaning-free filtration. It also permitted stable operation at a moderate supra-critical flux (16L/hm²), enhancing backwashing efficiency and providing high net permeate fluxes (11.7–12.3L/hm²).