Enhancing cavitating treatment intensity with optimized temperature for bacterial removal in waterbodies

doi:10.3850/978-90-833476-1-5_iahr40wc-p0077-cd

科研成果详情

题名	Enhancing cavitating treatment intensity with optimized temperature for bacterial removal in waterbodies
作者	Ge，Mingming 1,2; Lee，Joseph H.W.1; Li，Ruipeng 2; Fan，Dixia 2
发表日期	2023
会议录名称	Proceedings of the IAHR World Congress
ISSN	2521-7119
页码	2180-2185
摘要	Hydrodynamic or acoustic cavitation combined with advanced oxidation processes (AOPs) is a promising alternative to the technologies of wastewater treatment technologies in use today. Cavitation combined with AOPs shows their effectiveness in water disinfection and oxidizing organic contaminants such as pharmaceuticals, organic dyes, and insecticides. The analysis of the economics of the treatment processes performed to evaluate the possibility of scaling up reveals that the economic operations should be based on hydrodynamic cavitation. Venturi-type cavitation reactors can be one of the most promising candidates for industrial-scale production due to their cheapness and ease of construction, scaling, and replicability. The effects of temperature on hydrodynamic cavitating flow in a Venturi section are investigated to find the optimum reacting conditions enhancing cavitating treatment intensity. The flow conditions are varied with different flow rates and a wide range of temperatures between 28 °C to 63 °C. Results show that both the cavitation length and the transition between sheet and cloud cavitation regimes are influenced by a combination of the pressure drop (indicated by the cavitation number σ), the inertial/viscous effects (controlled by the Reynolds number Re), and the thermal effect (indicated by the thermodynamic parameter). As the temperature is elevated, both the cavitation length and thickness increase first, and then decrease. The cavitation intensity peaks at a transition temperature of 58 °C. With the rise of cavitation length and thickness, the regimes tend to switch earlier from the attached sheet cavity to periodical cloud shedding, and the shedding frequency decreases accordingly. This study allows us to understand the instability, size evolution, and shedding regime transition of partial cavities considering thermodynamic effects. Recommendations are provided to water treatment industries that working under a 55 °C to 60 °C temperature range will attain the highest cavitation intensity.
关键词	Cavitation intensity Cavitation shedding regimes Hydrodynamic cavitation Thermodynamic effects Water treatment
DOI	10.3850/978-90-833476-1-5_iahr40wc-p0077-cd
URL	查看来源
语种	英语English
Scopus入藏号	2-s2.0-85187679651
引用统计
文献类型	会议论文
条目标识符	https://repository.uic.edu.cn/handle/39GCC9TT/12296
专题	个人在本单位外知识产出
通讯作者	Ge，Mingming
作者单位	1.Macau University of Science and Technology,MSARC,999078,China 2.Westlake University,Hangzhou,310030,China
推荐引用方式 GB/T 7714	Ge，Mingming,Lee，Joseph H.W.,Li，Ruipenget al. Enhancing cavitating treatment intensity with optimized temperature for bacterial removal in waterbodies[C], 2023: 2180-2185.