10 0

Experimental investigation of the thermal and disinfection performances of a novel hydrodynamic cavitation reactor

Title
Experimental investigation of the thermal and disinfection performances of a novel hydrodynamic cavitation reactor
Author
엄애선
Keywords
Hydrodynamic cavitation; Water disinfection; Escherichia coli; Treatment rate; Thermal performance; Economy
Issue Date
2018-12
Publisher
ELSEVIER SCIENCE BV
Citation
ULTRASONICS SONOCHEMISTRY, v. 49, page. 13-23
Abstract
In the present study, we proposed an effective, efficient, and economical approach to disinfect water using a novel, advanced, rotational hydrodynamic cavitation reactor (HCR). First, analyses of the flow field and cavitation generation mechanism in the HCR were conducted through visualization of the reactor flow field using a high-speed camera. Second, the thermal performance was tested in 20 experiments with various rotational speeds of the rotor (2700, 3000, 3300, and 3600 rpm) and pump pressure settings (0.0, 0.5, 0.7, 1.0, and 1.5 bar gauge pressure). The HCR maximally achieved a heat generation rate of 48.15 MJ/h and thermal efficiency of 82.18%. Then, the disinfection effect was evaluated using water that simulated an effluent containing Escherichia coli (E. coli) for various flow rates (8, 11, and 14 L/min), a pump pressure setting fixed at 0.5 bar, and a rotational speed of 3600 rpm. In addition, an economical assessment of the disinfection processes was performed by considering the measured electric consumption. The thermal effect generated by the HCR was the dominant factor affecting the concentration of E. coll. The HCR achieved a 100% disinfection rate with a 4.3 L/min treatment rate and a cost of US $ 3.019/m(3) at the optimal flow rate. The effects of the pressure setting and rotational speed on the performance were discussed in detail. Finally, compared to the recent studies, the treatment rate of the HCR is several hundred times greater than that obtained by the HCRs utilized in those studies, and also has a reasonable cost.
URI
https://www.sciencedirect.com/science/article/pii/S1350417718303006?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/121095
ISSN
1350-4177; 1873-2828
DOI
10.1016/j.ultsonch.2018.02.039
Appears in Collections:
COLLEGE OF HUMAN ECOLOGY[S](생활과학대학) > FOOD & NUTRITION(식품영양학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE