大多数臭氧氧化/生物工艺都是作为一个单程系统应用的，在生物处理之前，在该系统中应用臭氧。在这种情况下，一些本来可以被生物降解的有机物会被臭氧氧化，从而增加臭氧需求。单通系统的另一个缺点是，经生物处理的水可能会被臭氧进一步氧化，从而降低可生物降解有机物的浓度并稳定经处理的水。然而，当在这种组合系统中使用再循环时，反应器的停留时间随着再循环率的增加而减少。这将是降低系统效率的一个因素。众所周知，臭氧和过氧化氢（称为Peroxone系统）的组合可以提高羟基自由基的浓度，并且由于其非选择性，羟基自由基可以有效地氧化天然有机物（NOM）。 因此，如果Peroxone系统能够去除可生物去除的部分NOM，预计流化床处理（FBT）系统的保留时间可以缩短。因此，在循环臭氧层/FBT系统中，Peroxone是臭氧的替代品。本文研究了臭氧氧化和Peroxone与生物流化床处理相结合去除三卤甲烷（THM）前体。该系统在有再循环和无再循环的情况下运行。包括6个参考文献、图表。

Most ozonation/biological processes have been applied as a single pass system inwhich ozone is applied prior to biological treatment. In such cases, some of theorganic matter that could otherwise have been degraded biologically is oxidizedby ozone, thereby increasing the ozone demand. Another disadvantage of singlepass systems is that the biologically treated water could likely be furtheroxidized by ozone, thereby reducing the concentration of biodegradable organicmatter and stabilizing the treated water. However, when the recirculation isutilized in this combined system, the retention time of the reactors decreases asthe recirculation rate increases. This would be a factor in decreasing systemefficiency. It has been well established that the combination of ozone andhydrogen peroxide (known as the Peroxone system) can enhance the hydroxyl radicalconcentration and that the hydroxyl radical can effectively oxidize naturalorganic matter (NOM) due to its nonselectivity. Therefore, it is expected thatthe retention time of the fluidized bed treatment (FBT) system can be reduced ifthe Peroxone system can remove some portion of the NOM that can be removedbiologically. Thus, Peroxone is an alternative to ozone in recirculatingozone/FBT systems. Ozonation and Peroxone in combination with biologicalfluidized bed treatment was investigated for the removal of trihalomethane (THM)precursors in this study. The system was operated both with and withoutrecirculation. Includes 6 references, figures.