摘要
Ultrasonic field was applied in the treatment of oil emulsification wastewater by ZrO2 ceramic mem-brane. The permeate flux, rejection ratio in the filtration process and recovery ratio of flux in the membrane cleaning process were measured. Great improvement in the permeate flux and rejection ratio have been observed for the membrane process enhanced by the ultrasonic field. The permeate flux of water through the membrane was about 210L.m^-2.h^-1 and the oil rejection ratio was over 99.9% under the optimal ultrasonic treatment conditions, which were 8W of ultrasonic power, 7cm of ultrasonic probe length introduced into the membrane channel and the same ultrasonic radiation direction as the wastewater flow. The resistance of the membrane process was compared between the cases with and without ultrasound, and the total resistance was reduced 68% by the use of ultrasound, Four methods including water cleaning, water cleaning under sonication, chemical cleaning and chemical cleaning under sonication were used to recover membrane flux. It was found that the flux recovery ratio increased with the increase of ultrasonic cleaning power. In addition, the use of chemical agents combining with ultrasonic irradiation showed a synergistic effect, which resulted in the highest cleaning efficiency and the shorter cleaning time.
超声的地被 ZrO2 陶器的膜在油乳化废水的处理使用。permeate 流动，在过滤过程的拒绝比率和在清洗过程的膜的流动的恢复比率被测量。在 permeate 流动和拒绝比率的大改进为由超声的域提高的膜进程被观察了。通过膜的水的 permeate 流动关于 210L · m -2 · h-1，油拒绝比率在最佳的超声的处理条件下面是超过 99.9% ，它是超声的力量的 8W，超声的探查长度的 7cm 作为废水流动介绍了进膜隧道和一样的超声的放射方向。膜过程的抵抗有或没有超声在盒子之间被比较，并且全部的抵抗被减少 68% 由超声的使用。包括清洗的水的四个方法，在 sonication 下面清洗的水，化学清洗和在 sonication 下面清洗的化学药品被用来恢复膜流动。随超声的清洗的增加增加的流动恢复比率驱动，这被发现。另外，与超声的照耀结合的化学代理人的使用显示出 synergistic 效果，它导致了最高的清洗效率和更短的清洗时间。
基金
Supported by the Special Funds for Major State Basic Research Program of China （973 Program, No.2003CB615707） and the National Natural Science Foundation of China （No.20436030）.
