抄録
In conventional Membrane BioReactor (MBR) systems, aeration is needed not only to provide oxygen to activated sludge but also to prevent submerged membranes from fouling. It is essential to reduce the aeration rate in order to develop cost–effective MBR systems because blowers consume a lot of energy. In this study, we present a new cakeremoval strategy toward more cost-effective MBR systems. This strategy is based on the cake–removal by uplifting water flow, which is generated by mixers or pumps. We demonstrated that Trans Membrane Pressure (TMP) did not increase without aeration when the uplifting flow is >0.55 m/s in laboratory scale examinations. Pilot scale experiments where aeration rate was exactly equal to biological Actual Oxygen Required (AOR) were also conducted, TMP jumps have not been observed. To explore feasibility of full–scale plant, fluid dynamics simulations were conducted.
