Clarification of Effects of Parameters on the Water Purification Using Micro bubbles

为了弄清微气泡对水净化或水本身的影响，我们通过改变微气泡产生过程的相关参数，对水中添加微气泡的效果进行了实验。测量是在实验室进行的，始终控制以免干扰影响结果。研究了微气泡产生方式、气体种类、气泡直径及其分布、孔隙率和温度等参数对微气泡生成的影响。实验测量值为zeta电位、液相DO、COD、ph值、微气泡对管流的减阻、洗涤能力。结果表明，在微气泡的作用下，DO值保持饱和值，COD值也有所增加。在微气泡的洗涤能力方面，发现共享法产生的气泡具有一定的洗涤能力。另一方面，通过共享方式产生的气泡对管道流的减阻也很有效。微气泡的产生方式和气体种类对zeta电位也有一定的影响。

In order to make clear the effect of micro bubbles on the water purification or the water itself, we made experiments on what effect appears when adding micro bubbles on water with changing the parameters relating to the producing processes of micro bubbles. Measurements were performed in the laboratory consistently controlled lest the disturbances should affect the results. The effects of parameters were investigated under changing the producing method of micro bubbles, gas species, bubble diameter and its distribution, void fraction and temperature. The measured values in the experiments were the zeta potential, the DO, the COD and the ph values of liquid phase, the drag reduction of pipe flow caused by micro bubbles, and the washing capability.As a result, the DO value kept a saturation value when micro bubbles were supplied, the COD value also increased. On the washing ability of micro bubbles, it was found that the bubbles produced by the sharing method have some ability in washing. On the other hand, the bubbles produced by the sharing method were also effective on the drag reduction of pipe flow. The zeta potential was also affected by the producing method of micro bubbles, and the gas species in some degree.