Inactivation of Algae and Plankton by Ultrasonic Cavitation
Inactivation of Algae and Plankton by Ultrasonic Cavitation
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DOI：
10.3390/su13126769
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发表时间：
2021-06
期刊：
影响因子：
3.9
通讯作者：
A. Honda;Fumiya Sugino;Ken Yamamoto
中科院分区：
文献类型：
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作者：
A. Honda;Fumiya Sugino;Ken Yamamoto
超声波微生物处理技术由于不使用特殊的化学品，设备简单，作为一种有用的水处理技术而备受关注。此外，由于微生物细胞在处理过程中被破坏，因此可以应用于成分提取技术。虽然超声空化气泡被认为参与了处理机制，但该机制的细节仍不清楚。本研究旨在探讨超声波对藻类、微囊体及浮游生物的破坏机制。用超声波在宽的频率范围内照射每个样品，并且在所有样品中观察到频率依赖性。对于藻类和微胶囊，我们匹配的频率对共振频率计算的基础上，使用相邻的超声空化气泡的机械共振模型。结果发现，在超声波照射后，浮游生物的形状发生了部分破坏，这说明气泡引起的局部作用即剪切应力的作用。通过基于气泡振动方程估计剪切应力值，确认趋势匹配。
Microbial treatment by ultrasonic waves has been attracting attention as a useful water treatment technology because it does not use special chemicals and the equipment is simple. In addition, because microbial cells are destroyed during treatment, it can be applied to ingredient extraction technology. Although ultrasonic cavitation bubbles are thought to be involved in the processing mechanism, the details of the mechanism remain unclear. The purpose of this study was to elucidate the destruction mechanism of algae, microcapsules, and plankton by ultrasonic waves. Each sample was irradiated with ultrasonic waves over a wide range of frequencies, and frequency dependence was observed in all the samples. For algae and microcapsules, we matched the frequencies against the resonance frequency calculated based on the mechanical resonance model using adjacent ultrasonic cavitation bubbles. As a result, a good match was found. For plankton, partial damage to the shape was observed after ultrasonic irradiation, suggesting that shear stress, which is a local action caused by bubbles, was involved. By estimating the shear stress value based on the vibration equation of bubble, it was confirmed that the tendencies match.