Disinfection of Wastewater Using a 20‐kHz Ultrasound Unit
Disinfection of Wastewater Using a 20‐kHz Ultrasound Unit
复制标题
使用 20 kHz 超声波装置对废水进行消毒
DOI：
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发表时间：
2002
影响因子：
3.1
通讯作者：
J. N. Jensen
中科院分区：
文献类型：
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作者：
B. Madge;J. N. Jensen
本研究探索了20 kHz超声仪在生活污水消毒中的应用。实验是用超声波探头批量进行的。随着超声波功率从70W/L的0.003对数杀灭/分钟增加到1250W/L的1.8对数杀灭/分钟，粪大肠菌群的消毒效率提高，消毒数据符合以超声波功率代替化学浓度的Chick-Watson消毒模型(稀释系数n=2.0)。水质对消毒效果影响不大。超声波治疗引起的体温升高非常显著。试图控制温度导致消毒效率显著下降。为量化热机制的作用而设计的实验表明，在超声波产生的总杀伤力中，约52%归因于热，36%归因于与超声诱导空化相关的机械应力，12%归因于未确定的协同效应。使用9.3-L中试规模的超声波装置，在直通条件下操作，展示了成功的放大。
The present study explored the application of a 20‐kHz ultrasound unit for the disinfection of domestic wastewater. Experiments were conducted in batch with an ultrasound probe. The disinfection efficiency of fecal coliform increased with ultrasound power input from 0.003 log kill/min at 70 W/L to 1.8 log kill/min at 1250 W/L. Disinfection data are well‐described by the Chick–Watson disinfection model (coefficient of dilution, n = 2.0) using ultrasound power in place of chemical concentration. Water quality did not affect disinfection efficiency significantly. Temperature increases experienced with ultrasonic treatment were significant. Attempts to control the temperature resulted in a marked decrease in disinfection efficiency. Experiments devised to quantify the role of thermal mechanisms revealed that of the total kill produced by ultrasound approximately 52% was attributed to heat, 36% to mechanical stresses associated with ultrasonically induced cavitation, and 12% to uncharacterized synergistic effects. Successful scale‐up was demonstrated using a 9.3‐L pilot‐scale ultrasound unit, operated under flow‐through conditions.
超声波体外细胞毒性作用取决于气体含量、频率、自由基清除剂和附着。
影响因子：
3.4
作者：
Armour,EP;Corry,PM
通讯作者：
Corry,PM