Sonication of bacteria, phytoplankton and zooplankton: Application to treatment of ballast water
Sonication of bacteria, phytoplankton and zooplankton: Application to treatment of ballast water
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DOI：
10.1016/j.marpolbul.2008.02.007
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发表时间：
2008-06-01
影响因子：
5.8
通讯作者：
Burkholder, JoAnn M.
中科院分区：
文献类型：
--
作者：
Holm, Eric R.;Stamper, David M.;Burkholder, JoAnn M.
我们研究了频率为19 kHz的高功率超声波对细菌、浮游植物和浮游动物存活的影响，以获得可用于设计压载水超声波处理系统的有效暴露时间和能量密度的估计。超声治疗的效果随受试生物的大小而变化。浮游动物只需要3-9秒的暴露时间和6-19 J/mL的超声波能量，就可以实现90%的存活率降低。相比之下，细菌和浮游植物的十进制还原时间为1 ~ 22 min，十进制还原能量密度为31 ~ 1240 J/mL。我们的研究结果表明，压舱水的独立超声波处理系统，工作频率为19 - 20 kHz，可能对体积为100 - 100克的浮游生物有效，但较小的浮游生物，如浮游植物和细菌，将需要额外或替代系统进行处理。(c) 2008 Elsevier Ltd.版权所有。
We investigated the effect of high power ultrasound, at a frequency of 19 kHz, on the survival of bacteria, phytoplankton and zooplankton, in order to obtain estimates of effective exposure times and energy densities that could be applied to design of ultrasonic treatment systems for ballast water. Efficacy of ultrasonic treatment varied with the size of the test organism. Zooplankton required only 3-9 s of exposure time and 6-19 J/mL of ultrasonic energy to realize a 90% reduction in survival. In contrast, decimal reduction times for bacteria and phytoplankton ranged from I to 22 min, and decimal reduction energy densities from 31 to 1240 J/mL. Our results suggest that stand-alone ultrasonic treatment systems for ballast water, operating at 19 20 kHz, may be effective for planktonic organisms > 100 gm in size, but smaller planktonic organisms such as phytoplankton and bacteria will require treatment by an additional or alternative system. (c) 2008 Elsevier Ltd. All rights reserved.