鼓泡填料塔中清水的氧传质研究

Study on Oxygen Mass Transfer in Bubbling Packed Tower

城市污水多采用好氧生物处理技术,曝气是污水好氧生化处理系统中最重要的工艺环节,曝气过程中的传质过程是当前污水处理的重要课题,而氧传质是传质的重要过程。利用溶质渗透模型对生物填料塔中的氧传质过程进行了理论分析与推倒,通过定义气液接触时间,导出鼓泡填料塔中清水的氧传质系数与操作条件和填料特征之间的关系式。并通过实验确定关系式中的特征参数。

Aerobic biological treatment is widely used in municipal wastewater treatment. Aeration is the most important process in operation. Research and exploitation of oxygen mass transfer in aeration process is still an important task in wastewater engineering. The feature of oxygen mass transferin water in bubbling packed tower was studied theoretically and experimentally. Equations for calculation liquidphase volumetric oxygen transfer coefficient in the bubbling packed tower were obtained by defining the contact time between gas and liquid. The parameter was confirmed from the experimental result.