Investigating the effect of colloids on the performance of a biofilm membrane reactor (BF-MBR) for treatment of municipal wastewater

T Leiknes, I Ivanovic, H Ødegaard
2009 Water S.A  
Performance of membrane reactor in combination with moving-bed-biofilm reactor (BF-MBR) for treatment of municipal wastewater was investigating in relation to different organic loading rates; high and low rate. Membrane was operated with constant flux 50 LMH and 96% recovery. The fouling rate was evaluated as development of the transmembrane pressure (TMP) during the operational time. Suspended solids concentrations (SS), organic matter (COD/FCOD), particle size distributions (PSD), capillary
more » ... (PSD), capillary suction time (CST) and time to filter (TTF) were daily measured and further related to TMP in order to determinate major fouling factor. A higher fouling potential was observed for high rate operating conditions. Fraction of organic matter below 1.2 µm was mostly related to the changes in TMP. Furthermore higher amount of particulate fraction below 0.1 µm in membrane reactor during the high rate presented a dominant contribution to membrane fouling -colloidal fouling.
doi:10.4314/wsa.v32i5.47861 fatcat:3r76wa43hjgv5c6lvebynfk5re