AWWA MTC61197

This slide presentation outlines information on membrane fouling at high organic loading rates in the submerged membrane bioreactor treating municipal wastewater. Topics covered include: two kinds of membrane bioreactors (MBR), modified activated sludge process and ultrafiltration (UF) / microfiltration (MF) membrane; external and submerged configurations; flow schemes for the SMBR and conventional activated sludge process; process limitation; rationale; effect of F/M on steady-state fouling rate; equipment and apparatus; membrane operation and characteristics; experimental methods; biological foaming - nocardioform; illustration of surfacing wasting for biological foam control; resistance in-series model; membrane performance at 10-d MCRT (F/M=0.50 gCOD/gVSS·d); membrane performance at 2-d MCRT (F/M=2.34 gCOD/gVSS·d); steady-state membrane fouling rates; membrane resistance terms; R_F and R_C from literature; cake resistance R_c; batch filtration results; fouled membrane FTIR results; and, conclusions. Includes figures.