A review on hydrodynamic cavitation disinfection: The current state of knowledge

Xun Sun; Jingting Liu; Li Ji; Guichao Wang; Shan Zhao; Joon Yong Yoon; Songying Chen

doi:10.1016/j.scitotenv.2020.139606

A review on hydrodynamic cavitation disinfection: The current state of knowledge

Sci Total Environ. 2020 Oct 1:737:139606. doi: 10.1016/j.scitotenv.2020.139606. Epub 2020 May 27.

Authors

Xun Sun¹, Jingting Liu², Li Ji³, Guichao Wang⁴, Shan Zhao⁵, Joon Yong Yoon⁶, Songying Chen⁷

Affiliations

¹ Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education at Shandong University, School of Mechanical Engineering, Shandong University, 17923, Jingshi Road, Jinan, Shandong Province 250061, People's Republic of China. Electronic address: xunsun@sdu.edu.cn.
² Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education at Shandong University, School of Mechanical Engineering, Shandong University, 17923, Jingshi Road, Jinan, Shandong Province 250061, People's Republic of China. Electronic address: liujingting@sdu.edu.cn.
³ Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education at Shandong University, School of Mechanical Engineering, Shandong University, 17923, Jingshi Road, Jinan, Shandong Province 250061, People's Republic of China. Electronic address: liji@sdu.edu.cn.
⁴ Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education at Shandong University, School of Mechanical Engineering, Shandong University, 17923, Jingshi Road, Jinan, Shandong Province 250061, People's Republic of China. Electronic address: wanggc@sdu.edu.cn.
⁵ Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University,72 Jimobinhai Road, Qingdao, Shandong Province 266237, People's Republic of China. Electronic address: szhao@sdu.edu.cn.
⁶ Department of Mechanical Engineering, Hanyang University, 55, Hanyangdaehak-ro, Ansan, Gyeonggi-do 15588, Republic of Korea. Electronic address: joyoon@hanyang.ac.kr.
⁷ Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, National Demonstration Center for Experimental Mechanical Engineering Education at Shandong University, School of Mechanical Engineering, Shandong University, 17923, Jingshi Road, Jinan, Shandong Province 250061, People's Republic of China. Electronic address: chensy66@sdu.edu.cn.

PMID: 32783818
DOI: 10.1016/j.scitotenv.2020.139606

Abstract

Disinfection, which aims to eliminate pathogenic microorganisms, is an essential step of water treatment. Hydrodynamic cavitation (HC) has emerged as a promising technology for large-scale disinfection without introducing new chemicals. HC, which can effectively induce sonochemistry by mechanical means, creates extraordinary conditions of pressures of ~1000 bar, local hotspots with ~5000 K, and high oxidation (hydroxyl radicals) in room environment. These conditions can produce highly destructive effects on microorganisms in water. In addition, the enhancements of chemical reactions and mass transfers by HC produce the synergism between HC and disinfectants or other physical treatment methods. HC is generated by hydrodynamic cavitation reactors (HCRs), therefore, their performance basically determines the effectiveness, economical efficiency, and applicability of HC disinfection. Therefore, developing high-performance HCRs and revealing the corresponding disinfection mechanisms are the most crucial issues today. In this review, we summarize the fundamental principles of HC and HCRs and recent development in HC disinfection. The energy release from cavitation phenomenon and corresponding mechanisms are elaborated. The performance (effectiveness, treatment ratio, and cost) of various HCRs, effects of treatment conditions on performance, and applicability of HC disinfection are evaluated and discussed. Finally, recommendations are provided for the future progress based on the analysis of previous studies.

Keywords: Applicability; Hydrodynamic cavitation reactor; Microorganisms; Treatment conditions; Water disinfection.

Publication types

Review

MeSH terms

Disinfectants*
Disinfection
Hydrodynamics
Water Microbiology
Water Purification*

Substances

Disinfectants