Evaluation of Biological Tower Design Methods,
OKLAHOMA STATE UNIV STILLWATER DEPT OF CIVIL ENGINEERING
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The first-order kinetic relationships and total organic loading relationship have been evaluated as design methods for biological towers. The data used in these evaluations were obtained over several years in the Bioenvironmental Engineering Laboratories at Oklahoma State University. This evaluation has shown the BOD removal with depth of tower does occur as first-order kinetics. However, it has also been shown that at some depth in the tower the removal rate changes and at least two first-order removal rates exist. It was also observed that the removal rate or reaction rate varies with influent BOD, hydraulic loading, and type of waste-water however, variation due to influent BOD and hydraulic loading can create a serious design problem if this variation is not considered in the design process.