Keywords: ceramic membrane bioreactors, wastewater treatment, membrane fouling, aeration, filtration, washing agents, flux recovery
Wastewater treatment using bioreactor with dual functional ceramic membrane
A novel bioreactor including a group of dual functional ceramic membranes was developed and used for wastewater treatment. The ceramic membranes could be used for both aeration and filtration alternately, so fouling to ceramic membrane would be palliated effectively as its dual functions. For 100 days operation, COD removal ratio was 88∼97% for influent COD of 154∼1389 mg/L, and NH4+-N removal ratio was 98% for influent NH4+-N of 7.52∼51.35 mg/L. Some washing methods aiming at foul were discussed, experimental results indicated that surface foul is main factor to ceramic membrane and NaClO is better washing agent for the flux recover.