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Fundamental study of sterilization effects on marine Vibrio sp in a cylindrical water chamber with supply of only underwater shock waves
Wang JZ(王静竹); Abe A; Wang YW(王一伟); Huang CG(黄晨光)
2018-04-01
发表期刊ULTRASONICS SONOCHEMISTRY
卷号42页码:541-550
ISSN1350-4177
摘要The effect of shock sterilization on marine Vibrio sp. is investigated by carrying out a bio-experiment based on a bubble-shockwave interaction. In the experiments, underwater shock waves with different strength and frequencies are produced by a high-voltage power supply in a cylindrical water chamber. The bio-experimental results show marine Vibrio sp. is completely inactivated in a short time by a 1.0-Hz electric discharge. However, a high sterilization effect requires a strong and high frequency of the bubble motion, and it also depends on the lifetime of the bubble. Subsequently, by an experiment with an air gap to prevent the underwater shock waves entering the cell suspension, it is found that the introduction of a strong shock pressure is not entirely required to obtain the effective sterilization. On the other hand, the direct effect of the sterilization by rebound shock wave resulting from the bubble-shock wave interaction is examined in the experiments. The results suggest that free radicals mainly contribute to killing marine bacteria, and direct mechanical effects of the bubble motion are not responsible. In addition, the creation of the OH radical is indirectly confirmed by measuring the H2O2 concentration. Finally, the Herring equation is solved to investigate the condition of free radical generation when considering the effect of thermal conductivity at the bubble interface. As a result, the effective sterilization conditions based on the bubble-shock wave interaction are clearly obtained.
关键词Ship's ballast water Bubble-shock wave interaction Free radicals Rebound shock wave Sterilization effect Cylindrical water chamber
DOI10.1016/j.ultsonch.2017.11.047
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000426021200058
关键词[WOS]MICROBUBBLES ; LITHOTRIPSY ; BUBBLE
WOS研究方向Acoustics ; Chemistry, Multidisciplinary
WOS类目Acoustics ; Chemistry
项目资助者JSPS KAKENHI Japan [16H04600, 16K14512] ; National Natural Science Foundation of China - China [11772340, 11332011]
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77815
专题流固耦合系统力学重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
3.Kobe Univ, Grad Sch Maritime Sci, 5-1-1 Fukaeminami Machi, Kobe, Hyogo 6580022, Japan
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Wang JZ,Abe A,Wang YW,et al. Fundamental study of sterilization effects on marine Vibrio sp in a cylindrical water chamber with supply of only underwater shock waves[J]. ULTRASONICS SONOCHEMISTRY,2018,42:541-550.
APA 王静竹,Abe A,王一伟,&黄晨光.(2018).Fundamental study of sterilization effects on marine Vibrio sp in a cylindrical water chamber with supply of only underwater shock waves.ULTRASONICS SONOCHEMISTRY,42,541-550.
MLA 王静竹,et al."Fundamental study of sterilization effects on marine Vibrio sp in a cylindrical water chamber with supply of only underwater shock waves".ULTRASONICS SONOCHEMISTRY 42(2018):541-550.
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