A Study on the Wastewater Treatment Characteristics according to Operating Condition of the Indirectly Aerated Fluidized Bed

간접(間接) 포기식 유동상(流動床)의 운전조건(運轉條件) 변화에 따른 처리(處理) 특성(特性)에 관한 연구 -오니전환율 및 산소이용속도를 중심으로-

The characteristics of wastewater treatment according to operating condition of indirectly aerated fluidized bed filled with sand media were studied experimentally, and the obtained results were as follows; 1. During be operated under the BOD loading rate, $4.5kg-BOD/m^3{\cdot}day$, effluent SS according to the increase of recirulation velocities was gradually decreased. 2. According to the increase of media concentration, sludge convertion rate was gradually increased. 3. Under the same BOD loading rate, according to the increase of recirulation velocities, F/M ratio was gradually increased, however, sludge convertion rate was greatly decreased. On the other hand, inffluent BOD concentration has not an important effect. 4. Under the constant recirulation velocities, according to the increase of BOD loading rate, sludge convertion rate was gradually increased. 5. Under the same BOD loading rate, according to the increase of recirulation velocities, oxygen consumpion rate of microorgnism was gradually increased.