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Greywater treatment in a submerged membrane sequencing batch reactor (SM-SBR)

Gildemeister R., Drews A., Kraume M.

Environment Protection Engineering

2005

Vol. 31, nr 3-4

39-52

Greywater reuse will play an important role in the sustainable water management approach. Depending on its intended use, different treatment technologies are needed. This study focuses on the performance of a submerged membrane sequencing batch reactor (SM-SBR) for biological treatment of synthetic greywater. Two different reactors are operated: the first one, a 27 dm3 lab-scale reactor, and the second one, a commercial 1 m3 MBR manufactured by the BUSSE company. In terms of COD removal, the first analyses show a good performance under different operating conditions, e.g. varying cycle time (tc) and the volumetric exchange ratio (VER). The ammonium utilisation rate (AUR) and the nitrate utilisation rate (NUR) are evaluated and compared to data found in literature. The NUR shows limitations due to slowdegrading COD of synthetic greywater, resulting in the question whether an additional carbon source should be used to enhance the process.