本文介绍了在加利福尼亚州拉凡尔纳市南加州大都会水区F.E.韦茅斯过滤厂进行的更全面的中试规模调查中所进行的示踪剂和臭氧氧化试验的结果。臭氧氧化试验旨在研究分散对水柱中臭氧浓度分布的影响。根据示踪剂和臭氧氧化试验的结果，开发并校准了计算机模型。然后，该模型用于预测接触器内部观察到的臭氧浓度分布，以及在大都会试点调查期间进行的其他几项实验中接触器废水中的残余物。示踪试验的实验结果和模型预测表明，在典型操作条件范围内，臭氧鼓泡器扩散器接触器内的混合条件可能从高混合变为接近塞流。 一般来说，对于恒定的气体和水流量，分散度与接触器中水柱的高度无关。

This article presents the results of tracer and ozonation tests performed as part of a more comprehensive pilot-scale investigation conducted at the F.E. Weymouth Filtration Plant, Metropolitan Water District of Southern California, La Verne, California. The ozonation tests were designed to study the effect of dispersion on ozone concentration profiles in the water column. A computer model was developed and calibrated with the results from the tracer and ozonation tests. The model was then used to predict observed ozone concentration profiles inside the contactor, and residuals in the contactor effluent for several other experiments performed during the Metropolitan pilot investigation. Experimental results and model predictions for tracer tests indicated that mixing conditions inside the ozone bubbler-diffuser contactors could change from high-mixing to close to plug-flow within the range of typical operating conditions. In general, dispersion was independent of the height of the water column in the contactor for constant gas and water flow rates.