Effect of hydrodynamic cavitation on zooplankton: A tool for disinfection
Effect of hydrodynamic cavitation on zooplankton: A tool for disinfection
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DOI：
10.1016/j.bej.2008.08.001
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发表时间：
2008-12-01
影响因子：
3.9
通讯作者：
Pandit, Aniruddha Balchandra
中科院分区：
文献类型：
--
作者：
Sawant, Subhash Shivram;Anil, Arga Chandrashekar;Pandit, Aniruddha Balchandra
水力空化在水消毒中的应用正在获得动力，因为它提供了环境和经济上合理的选择。在这项努力中，描述了由差压泵阀打开产生的空化条件和由流过空化元件（孔板）产生的空化条件对微生物（海水中的浮游动物）的影响。实验结果与空化条件的建模进行了比较，空化条件包括腔动力学、单个振荡腔产生的湍流、细胞壁强度以及空化装置的几何和操作参数。建立了空化产生的湍流剪切和微生物消毒程度的定量理论模型。实验结果表明，空化和/或湍流流体剪切主要起源于空化是有效的工具，海水消毒的浮游动物在海水中存在的80%以上被杀死。还观察到，由于空化产生的冲击波不是浮游动物破坏的唯一原因。正确的物理机制，考虑流体湍流和剪切，产生稳定振荡的空腔，显着贡献的中断。对模型的进一步改进将为进一步提高消毒效果提供依据，为海水消毒提供实用工具。(C)2008 Elsevier B.V.保留所有权利。
Application of hydrodynamic cavitation for disinfection of water is gaining momentum, as it provides environmentally and economically sound options. In this effort, the effect of cavitating conditions created by differential pump valve opening and that created by flowing through a cavitating element (orifice plates) on the microbes (zooplankton in sea water) is described. The experimental results are compared with modelling of cavitating conditions that includes cavity dynamics, turbulence generated by individual oscillating cavity, cell wall strength and geometrical and operating parameters of cavitation device. Theoretical model for quantifying the cavitationally generated turbulent shear and extent of microbial disinfection has been developed. Experimental results indicated that cavitation and/or turbulent fluid shear dominantly originating from cavitation are effective tools for sea water disinfection as more than 80% of the zooplankton present in the sea water were killed. It was also observed that shock waves generated due to cavitation is not the sole cause for zooplankton disruption. A correct physical mechanism accounting fluid turbulence and shear, generated from stable oscillation of cavity, significantly contribute towards the disruption. Further refinement of the model presented will serve as a basis for higher degree of disinfection and provide a practical tool for sea water disinfection. (C) 2008 Elsevier B.V. All rights reserved.