Enhanced biological phosphorus removal (Bio-P) in a membrane bioreactor (MBR) promises several advantages but was never attempted as not compatible with high sludge ages. This article includes description and results of bench-scale investigations on Bio-P removal in an MBR. An MBR bench-scale plant (210 L) was operated in parallel to a conventional WWTP under comparable process conditions. The results show that Bio-P removal is possible in MBR. The effluent qualities of the plants were comparable. The effluent P-concentration was always lower than 0.2 mg PT/L. In the MBR bench-scale plant P-uptake occurred mainly in the anoxic zone. Investigations with P-spiking showed higher Bio-P potential as P-removal increased up to 20-25 mg/L while P/TS rose up to >6%.
Enhanced biological phosphorus removal in membrane bioreactors
C. Adam, R. Gnirss, B. Lesjean, H. Buisson, M. Kraume; Enhanced biological phosphorus removal in membrane bioreactors. Water Sci Technol 1 August 2002; 46 (4-5): 281–286. doi: https://doi.org/10.2166/wst.2002.0606
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