The impact of UV treatment on microbial control and DBPs formation in full-scale drinking water systems in northern China

Ao, Xiuwei; Chen, Zhongyun; Li, Simiao; Li, Chen; Lù, Zhongwen; Sun, Wenjun

doi:10.1016/j.jes.2019.08.003

Cited by 20 publications

(4 citation statements)

References 41 publications

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“…Moreover, research has found that combining UV and chloramine is more effective than using UV or chloramine alone, significantly reducing disinfection by-products, lowering genetic toxicity, and enhancing the disinfection efficacy against both protozoa and chlorine-resistant pathogenic bacteria ( Sun et al, 2019 ). Combined with chlorine disinfection, compared to traditional UV disinfection, improves the safety of water quality in the network ( Ao et al, 2020 ).…”

Section: Uv Technology Applications In Drinking Water Disinfectionmentioning

confidence: 99%

“…This shift highlights the increasing importance of UV disinfection technology in China's water supply sector. The ability of UV disinfection to improve the safety of water supplies compared to traditional methods recognizes the growing role of this technology in meeting the evolving needs of water treatment and water supply systems in China ( Ao et al, 2020 ). In recent years, research on advanced oxidation processes based on UV (UV-AOPs) has become more profound, with the mature implementation of the UV/H 2 O 2 technology in engineering applications in China ( Song et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultraviolet technology application in urban water supply and wastewater treatment in China: Issues, challenges and future directions

Sun,

Ao,

et al. 2024

Water Research X

Self Cite

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Section: Uv Technology Applications In Drinking Water Disinfectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultraviolet technology application in urban water supply and wastewater treatment in China: Issues, challenges and future directions

Sun,

Ao,

et al. 2024

Water Research X

Self Cite

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“…Different from other disinfection method, UV, as a physical disinfection method, is a promising green method and have positive effect on disinfection process when combined with other disinfection method such as UV/Cl 2 , 96,97 UV/SO 3 2− , 98,99 and UV/H 2 O 2 . 97,100 Ao et al 101 investigated the impact of UV treatment on microbial control in DWTPs, the results showed that UV treatment showed high efficacy in inactivating chlorine-resistant microorganisms, and can mitigate microbial re-growth to some extent. Proteobacteria (relative abundance: 8.02–92.34%) and Firmicutes (1.38–86.87%) were the dominant phyla in UV irradiation samples.…”

Section: Impact On Microbial Diversity In Full-scale Water Supply Systemmentioning

confidence: 99%

Microbial diversity in full-scale water supply systems through sequencing technology: a review

Zhou

Chen

et al. 2021

RSC Adv.

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“…1. Ao et al (2020) observed that UV treatment can alleviate microbial re-growth to some extent. Additionally, UV treatment had a minimal effect on the development of DBPs.…”

Section: Introductionmentioning

confidence: 99%

Computational analysis of three lamp close conduit water disinfection UV reactor

Sultan

Ahmad

Hayat

et al. 2021

Int. J. Environ. Sci. Technol.

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The purpose of ultraviolet (UV) disinfection is to bring to end the growth and procreation of microorganism. UV reactors are used for the UV disinfection of the drinking water. Our goal of the current research work was properly locating the positions of the UV lamps in a three-lamp close conduit water disinfection UV reactor. Three positions of UV lamps are based on vertices of the four basic types of triangles (Equilateral, Right angle, Scalene and Isosceles). The objective function for optimized lamp positioning was Reduction Equivalent Dose (RED). To ascertain efficient UV dose delivery to pathogen, water disinfection UV reactors was simulated with the aid of computational fluid dynamics. The computational investigation was achieved employing ANSYS ® Fluent 15.0 academic version. The turbulent flow was modeled using standard k−ε model, fluence rate (FR) was modeled using UVCalc3D model and pathogen transport was modeled using discrete phase model. The scalene lamp positioning results in highest RED value and isosceles lamp positioning results in lowest RED value. There is meager difference between the RED values of equilateral and scalene lamp positioning. Moreover, we found two lamps on the upstream side and one lamp on the downstream side results in better UV disinfection. The proposed methodology for the three-lamp model provides useful insights to the design and optimization of close conduit water disinfection UV reactor. This research work has evaluated, for the first time, a systematic methodology for three-lamp positioning to ameliorate the performance of UV reactor and has revitalized the comprehension about the contribution of FR distribution within the UV reactor. KeywordsCFD • Fluence rate • Reactor design • Turbulence modeling • UV lamp • Water disinfection List of symbols A and B Constants in logarithm microbial inactivation rate function dt Pathogens residing time (s) I Irradiance of UV radiation (W m −2 ) k Inactivation rate constant (m 2 J −1 ) K in Turbulent kinetic energy (m 2 s −2 ) N Pathogen influent ( −) N 0 Pathogens effluent ( −) N/N 0 Log inactivation ( −) p Means pressure ( −) t Time (s) u i and u j Velocity components (m s −1 ) u in Velocity at inlet (m s −1 ) u i u j Reynolds stress tensor (m 2 s −2 ) ij Kronecker delta function ε in Turbulent dissipation at inlet (m 2 s −3 ) Laminar kinematic viscosity (m 2 s −1 ) t Turbulent kinematic viscosity (m 2 s −1 ) Density (kg m −3 ) k Prandtl-Schmidt number for K in ( −) Prandtl-Schmidt number for K (−) Subscripts i, j Position of a cell in Inlet Abbreviations CFD Computational fluid dynamics DBPs Disinfection-by-products DPM Discrete phase model FR Fluence rate RED Reduction equivalent dose SURF Simultaneous UV FR and fluid dynamics Editorial responsibility: Samareh Mirkia.

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The impact of UV treatment on microbial control and DBPs formation in full-scale drinking water systems in northern China

Cited by 20 publications

References 41 publications

Ultraviolet technology application in urban water supply and wastewater treatment in China: Issues, challenges and future directions

Ultraviolet technology application in urban water supply and wastewater treatment in China: Issues, challenges and future directions

Microbial diversity in full-scale water supply systems through sequencing technology: a review

Computational analysis of three lamp close conduit water disinfection UV reactor

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