通过预曝气增加进水DO含量，改进了生物处理装置的实际运行效果。试验采用常用的陶粒滤池工艺，安装两套相同的反应器，一套反应器采用传统的曝气方法供氧，原水直接进入反应器，另一套反应器的原水先进行纯氧预曝气，使之DO达到超饱和状态，反应器内不再进行曝气。试验结果表明，原水预先充氧达到超饱和状态后进行生物处理，原水中的DO可以满足微生物的需求，各项污染物的去除效果优于采用传统曝气方法供氧的生物处理装置。试验结果表明，开发适用于饮用水生物处理的无泡供氧装置具有现实意义。

The purpose of this study was to investigate the performance of a biofilter in which aeration process was not performed while adequate pure oxygen was dissolved into the influent before it was pumped to the biofilter. Two bio-ceramic filters were used in the experiment. The conventional aeration means was used in one bio-ceramic filter (BF-A) and raw water was pumped directly to the filter. At the same time, raw water was oversaturated by pure oxygen before it was pumped to another bio-ceramic filter (BF-B) and aeration was not performed in the filter. It was shown that dissolved oxygen in the influent of BF-B met the demand of microorganism in BF-B and the capability of BF-B to remove pollutants in raw water was superior to BF-A. This result indicated the significance of developing appropriate bubbleless aeration device fitting for oxygenation in biological treatment process of drinking water from the point of view of the biological treatment performance.