Dehghani Mohammad Hadi, Mahvi Amir Hossein, Jahed Gholam Reza, Sheikhi Razieh
Department of Environmental Health Engineering, School of Public Health, Medical Sciences/University of Tehran, PO Box 14155-6145, Tehran, IR Iran.
J Zhejiang Univ Sci B. 2007 Jul;8(7):493-7. doi: 10.1631/jzus.2007.B0493.
The objective of the investigation was to study the application of ultrasound reactor technology (USRT) as a disinfectant for reduction of fungi from sewage effluent. Fungi are carbon heterotrophs that require preformed organic compounds as carbon sources. USRT is an attractive means to improve water quality because of the system simplicity and no production of toxic by-products. An ultrasound reactor produces strong cavitation in aqueous solution causing shock waves and reactive free radicals by the violent collapse of the cavitation bubble. These effects should contribute to the physical disruption of microbial structures and inactivation of organisms. There was significant reduction in fungal growth, with decreased fungal growth with increasing USRT. In this study, ultrasound irradiation at a frequency of 42 kHz was used to expose suspensions of fungi to evaluate the disinfection efficacy of the ultrasound reactor. Also, this study showed that in this system more than 99% reduction of sewage fungi was achieved after 60 min.
该研究的目的是探讨超声反应器技术（USRT）作为一种消毒剂用于减少污水中真菌的应用。真菌是碳异养生物，需要预先形成的有机化合物作为碳源。由于系统简单且不产生有毒副产物，USRT是改善水质的一种有吸引力的方法。超声反应器在水溶液中产生强烈的空化作用，通过空化气泡的剧烈坍塌产生冲击波和活性自由基。这些效应应有助于对微生物结构进行物理破坏并使生物体失活。真菌生长显著减少，随着USRT增加真菌生长减少。在本研究中，使用42kHz频率的超声辐照使真菌悬浮液暴露，以评估超声反应器的消毒效果。此外，该研究表明，在该系统中，60分钟后污水真菌减少了99%以上。
