WANGJia-le,LIMeng-kai,SUNZhe,et al.Comparison between Biodosimetry and Model Simulation for Determining Fluence of UV Disinfector[J].China Water & Wastewater,2023,39(9):33-38.
Comparison between Biodosimetry and Model Simulation for Determining Fluence of UV Disinfector
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第9期
Page:
33-38
Column:
Date of publication:
2023-05-01
- Keywords:
- UV disinfector; determination of fluence; biodosimetry; computational fluid dynamics model simulation
- Abstract:
- Ultraviolet (UV) disinfection has been widely used in water treatment. To ensure the reliability of UV disinfection, sufficient UV fluence should be delivered in UV disinfector to meet the standard requirement, in which the accurate determination of fluence is the key. Biodosimetry and computational fluid dynamics (CFD) model simulation are the main methods for determining fluence in UV disinfector. However, their testing principles, accuracy, cost, and applications are different, which urgently need to be expounded with practical cases to provide references for domestic engineers and technicians. Biodosimetry and model simulation were applied to determine the fluence in a U-shaped UV disinfector. Their testing processes were systematically explained. The results showed that the tested UV disinfector achieved 2.74-lg, 2.38-lg, and 2.15-lg reductions of the challenge microorganism (i.e., MS2 phage), with biodosimetry determined fluences at 50.7 mJ/cm2, 44.1 mJ/cm2, and 39.7 mJ/cm2 for flow rates of 90 L/h, 106 L/h and 120 L/h, respectively. The results from CFD model simulation and biodosimetry were in good agreement. Furthermore, the errors, advantages and disadvantages, application objectives, potential optimization and improvement of the two methods were discussed. In practical applications, various impact factors should be comprehensively considered, and the appropriate method should be selected to improve the reliability of UV disinfection.
Last Update:
2023-05-01