| 摘要 |
<p>PURPOSE:To minimize the consumption of oxygen required for microorganisms to effect endogenous respiration in order to contrive a remarkable energy conservation by automatically holding to the minimum the amt. of air to be fed into a treating tank for aeration based on the calculated minimum amt. of air necessary for aeration. CONSTITUTION:Organic waste liq. is introduced into a treating tank 1 as the waste liq. A to be treated, the aeration is effected within or directly below a center draft tube 2 by an air diffusing device 3 and the organic waste liq. is purified with aerobic microorganisms while the liq. A and bioparticles being circulated in the directions of arrow in the treating tank 1 due to the air lifting effect accompanied by the rise of the air bubbles caused by the aeration. After separation from the particles at BP separating part 4, the liq. A, together with floating sludge, is allowed to flow into a settling tank 5 in order for SS content 6 such as floating sludge to be separated therefrom, thereby producing finally treated liq. In doing so, the amt. of air required for the aeration by the air diffusing device 3 is automatically held to the minimum based on the minimum amt. of air necessary for aeration calculated using the rate at which the carbon material is removed, nitrification rate of NH4-N and MLSS concn.</p> |
