A new liquid whistle ultrasonic generator has been studied. The effects of liquid whistle nozzle structure on the sound intensity are discussed,and liquid whistle combined with bactericide is adopted for circulating water sterili-zation. The experimental results show that the sound intensity of conical nozzle is the best,and the best cone angle is 45°. When the initial bacteria content is 1.2×106mL-1,and the water pressure 0.3 MPa,the sterilization rate of singly used liquid whistle can reach 39%in 90 min. Liquid whistle ultrasound and bactericide have good synergistic effect. It can reduce 41%-45%of bactericide dosage in 30 min with liquid whistle ultrasound. This method has good environ-mental and economic benefits.

研究了通过将溴丙基三苯基溴化固载到黏土陶粒填料表面而制备的新型抗菌陶粒填料在循环水杀菌中的应用。通过杀菌实验确定初始异养菌浓度大约为1010mL-1时的杀菌工艺条件:抗菌陶粒用量不少于0.3g/mL,间歇搅拌50 min,杀菌率可达99.3%。清洗并再生5次,杀菌率仍达74.2%以上;陶粒填充柱模拟工业循环水抗菌,100 g抗菌陶粒填料连续6 h处理水量3.6 L时,异养菌浓度控制在5×105mL-1以下。通过实验对比,再生时加入超声辐照后杀菌效果更好。