Research On Kinetics Of Ultrasonic Degradation To Organic Wasterwater

The mechanism of sono-degradation to organic contamination from the point of kinetics and the way of degradation was firstly dissertated in this paper. Some basic factors which can effect the efficiency of degradation, such as viscidity, surface tension steam pressure, temperature, dissolved gas, ultrasonic frequency , power, pH and the physical and chemical characters of organic contamination were analyzed; It was also described that the developmental and using prospect of ultrasound in the field of water disposal,especially, in the aspect of treating with hard-destructed, toxic waste water when cooperated with biology method. The kinetic formulation, which induced from ideal cavitating bubbles, not only enlarge our knowledge on mechanism of sonochemistry, but also be propitious to process control of sonication. Based on the two models of De Visscher et al, the paper bring a assumption on the center of resonant cavitating bubbles and construct a novel kinetic model. This model, which differenced from the models mention above in mechanism, leads to an equal mathematical formulation and broaden the applicable area of model.The sonication experiment to high-concentration glutamic acid in aqueous solution was studied in this paper.The study focused on the effects of initial-concentration, pH value, blast or puff,on the degradation kinetic of glutamic acid, and the decomposing mechanism was discussed here. At the same time, Ultrasonic degradation to coke plant wastewater and phenol,the main component in coke plant wastewater, are examined. The result indicates: during the process of ultrasound,the phenol has relatively fast degradation rate, and the biodegrability of coke plant wastewater is improved in some degree. All the results of experiments enhance our knowledge on the mechanism of sonication, and provide theoretics parameters for engineering application.