液旋回硫を伴うエアレーションタンク内液存酸素交換抵抗

概要

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In an activated sludge areation tank, gas bubbles fed into water exist only in the part of the tank where oxygen tranfer from bubbles to liquid occurs. Dissolved oxygen in the bubbling part is carried together with the spiral liquid flow, caused by the air-lift action of the fed gas, to the bubble-free part of the tank. It was deduced that, upon determination of the volumetric oxygen transfer coefficient, K_La, by the unsteady-state method, the contribution of dissolved oxygen conentration difference will be negligible between the bubbling part and the bubble-free part of the aeration tank in practice. This postulation was also more clearly shown by the fact that the entire oxygen transfer resistance is expressed as a linear combination of the resistance through the gas-liquid interface and of that associated with the dissolved oxygen exchange in the tank, in which oxygen is steadily consumed.
社団法人日本生物工学会の論文
1979-05-25