Development of Advanced Risk-Free Process for Restoring Environmental Water Using Micro・Nano Bubbles

(1)利用1号L鼓泡塔反应器对稀溶于水中的酚类化合物进行臭氧降解实验，验证了微泡处理相对于传统微泡处理的优越性。结果表明，臭氧降解酚类化合物的微泡处理所需的臭氧体积流量仅为微泡处理的1/5，这是因为微泡具有极高的比表面积和优越的臭氧吸收效率。(2)测量了直径约为20~60μm的微泡分散体的气泡尺寸分布、索特平均直径DVS、体积传质系数Kla和吸氧效率。比表面积和气体吸收效率的数值明显大于常规微泡分散的数值。

(1) The superiority of the micro-bubble treatment over the conventional milli-bubble treatment was experimentally verified based on the ozone degradation of phenolic compounds thinly dissolved in water in a 1 L bubble column reactor. The results showed that the volumetric flow rate of ozonated oxygen required for the micro-bubble treatment of ozone degradation of phenolic compounds was only 1/5 of that for the milli-bubble treatment, due to the extremely high specific interfacial area and superior ozone absorption efficiency.(2) The bubble size distribution, the Sauter mean diameter dvs, the volumetric mass transfer coefficient kLa, and the oxygen absorption efficiency were measured for micro-bubble dispersion including about 20～60μm diameter bubbles. The values of the specific interfacial area and the values of gas absorption efficiency are markedly greater than those for the conventional milli-bubble dispersion.