중공사분리막 모듈이 침지된 고액분리조를 이용한 활성슬러지의 고액분리

Solid Liquid Separation 0f A ctivated Sludge Using Solid—Liquid Separation Basin Containing Hollow Fiber Membrane Modules(SLSBM )

In this study, solid-liquid separation of permeates from the final aerobic basin was performed using solid-liquid separation basin containing hollow fiber m em brane m odules(S L S B M ). The M L S S value of the final aerobic basin and the S L S B M w as about 5,500 m g /L in both cases. W hen the air flow was increased from 30 N m3/hr to 45 Nm 3 /hr, the water flux(£/m 2 • hr) w as increased 20% and the fouling of the m em brane was reduced. The water flux w as also measured at various operating conditions such as suction time, idle time and backw ashing time. W hen the backw ashing time was increased twice w ithout an idle time, the flux w as increased 20%. W hen the backw ashing time was increased twice w ith 10 or 20 sec. idle time, the flux w as increased 30%. T he experimental results indicated that suspended solids(SS) and turmdity were removed about 99%. In addition, the organic(CODMn) removal efficiency of SLSBM was 2 times higher than that of the conventional activated sludge process.