Cross-Flow Microfiltratioin of Activated Sludge Using Submerged Membrane with Air Bubbling

概要

論文の詳細を見る
For the purpose of developing a wastewater treatment membrane bioreactor system, cross-flow microfiltration of intermittently aerated activated sludge was carried out, as a part of the solid-liquid separation process in the bioreactor. The tubular alumina microfiltration membrane, having a pore size of 0.5 μm, was submerged in the activated sludge. A cross-flow steam over the membrane surface was produced by air bubbling, generated by a diffuser situated underneath the membrane. An expotential relationship between the steady-state flux, J_<SS>, and the causative factors such as operating parameters and fluid characteristics was found and expressed as J_<SS>=V_L=K'u^<1.0>MLSS^<-0.5>, where V_L, K', u and MLSS are the lift velocity, filtration constant, air-liquid two-phase flow velocity and MLSS, respectively. The relationship, as expressed by the equation, is consistent with that for conventional cross-flow filtration using a circulation pump.
公益社団法人日本生物工学会の論文
1996-01-25