摘要
作为高级氧化技术,超声空化产生无选择性的强氧化性自由基,具有较大优势,但由于超声空化机理的特点使得有机物的完全矿化受到限制,而提高超声效率的常见方法有:优化频率、声强,与其他技术组合等。文章主要从超声波参数,添加剂,超声-高级氧化技术、超声-活性炭、超声-微生物处理、超声-石墨、超声-气浮、超声-膜处理、超声-混凝、超声-消毒技术等方面综述了超声强化技术原理及其在水处理中的应用研究进展。其中研究较少的方法有间歇超声、多频超声、充入多种气体以及超声与各工艺组合,如超声与活性炭、等离子体技术等组合,这些强化技术都一定程度的强化了超声效果。有些组合暂时未用于水处理,但经过完善也将大大催进水处理事业的发展。虽然超声波具有较大优势,但是由于其成本高,反应器生产技术限制,超声波大规模用于实际生产还需要较长一段时间。
As an advanced oxidation process, ultrasonic cavitation creating radicals, which have great advantage of nonselective strong oxidization. However it limits the complete mineralization of organics resulting from its characteristics. The common ways to improve the ultrasonic efficiency includes optimizing ultrasonic frequency and intensity and some other combined technologies else. This article mainly summarizes the mechanism and application progresses in application of ultrasonic enhancement technology in water treatment from the respects such as parameters of the ultrasound, additives, ultrasonic advanced oxidation technology, ultrasonic activated carbon, ultrasonic microbial treatment, ultrasonic graphite, ultrasonic flotation, ultrasonic membrane, ultrasonic coagulation and ultrasonic disinfection, which includes some seldom researched respects such as intermittent ultrasound, multi-frequency ultrasound, process by adding multi-gas as well as ultrasound combining with other processes such as ultrasound-activated carbon and ultrasound-plasma technology which strengthen the ultrasonic technology. Although some of them haven＇t been used in water treatment, with development and improvement, they will promote the development of the water treatment. In spite that the ultrasonic technology has great advantage in water treatment, it is restricted by its high cost and limitation of reactor manufacture. Therefore, there is stiff a long way to widely apply ultrasonic technology in water treatment.
出处
《四川环境》
2011年第6期133-138,共6页
Sichuan Environment
基金
高藻
高有机物湖泊型原水处理技术集成与示范(2008ZX07421-002)
关键词
高级氧化技术
强化超声
超声波组合
技术组合
Advanced oxidation process
ultrasonic enhancement technology
combination of ultrasound
combined technology
