     Downloads - Reports
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| D19 - Evaluation of the MBR technology from A3 Water solutions | |
| Project | AMEDEUS |
| Date | 14.6.2009 |
| Abstract | The trials performed at Anjou Recherche enabled to optimize the operating conditions and the cleaning strategy for the MBR filtration technology of A3 Water Solutions. The results showed that the A3 technology can operate at a flux of 25.5 L/h.m2 at 20°C for a relatively low membrane air flow rate of 0.2 Nm3/h.m2 under typical biological operating conditions (MLSS= 11g/L; SRT=28 d; F/M ration= 0.12 kg COD/kg MLSS.d). Compared with the original single-deck design, this led to a 40% flux increase (less membrane surface required), 70% footprint reduction for the filtration system (more compact process), and more than 80% reduction of the membrane air demand per permeate volume produced, leading to significant energy savings. The new concept outperforms now the performances of the current market leaders for MBR applications. It could be also demonstrated that the novel concept can support fouling events resulting from daily peak flow or biological disturbances for MLSS concentrations in the membrane tank inferior to 20 g/L. Few intensive cleanings will be required to maintain or recover the membrane performances that will limit the maintenance operations and costs and will make easier the operators work. The lab-scale tests showed that chlorine was efficient for all types of fouling. Two other cleaning reagents could be considered to clean the membrane if the use of chlorine is forbidden: hydrogen peroxide at pH 11 and the Filmzym p enzyme reagent. With these reagents, the soaking conditions have to be optimized and the cleaning costs would be more important. Further demonstration of the novel operation strategy will be performed at pilot- and full scale to validate the results obtained at Anjou Recherche, while considering the decrease of energy consumption. The triple deck module arrangement will be also tested in order to decrease more the membrane aeration per square meter of membrane and therefore further decrease the energy demand of the system. |
| Pages | 32 |
| Download | pdf (2.00 MB) |
