A Study on the Optimal Operation of the Intermittently Aerated Fluidized Bed

The effect of nonaeration/aeration ratio and cycle on the intermittently aerated fluidized bed were studied experimentally. and the obtained results were as follows : 1. Under the intermittent aeration. BOD removal rate was from 98.3% to 88.6% in the range of non-aeration rate 0.4 to 0.75. and the most economic non-aeration rate was 0.5. 2. Under the non-aeration rate of 0.5, effluent BOD improved from 4.2 mg/l to 2.5 mg/l as a non-aeration/aeration period was reduced. Effluent SS was getting better from 4.2 mg/l to 2.5 mg/l, too. 3. The repeating stress such as interception of air supply seems to promote the activity of a microorganism. 4. ratio (0.56) of the intermittent aeration was alike with 0.55 of continuous aeration, and oxygen consumption rate () of a microorganism in intermittent aeration was lower than 0.55 of continuous aeration. 5. Even though a non-aeration/aeration period was reduced to 10/20 min. the prosperity of filamentous bacteria was restrained nicely.