| Title |
Development of an UV Distribution Model for the Design of a Submerged UV Disinfection Reactor and Its Application |
| Authors |
박창연(Park, Changyeun) ; 김성홍(Kim, Sunghong) ; 최영균(Choi, Younggyun) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.5.0505 |
| Keywords |
UV3D; 자외선 강도; MPSS 모델; 자외선 살균 UV3D; Ultraviolet intensity; MPSS model; UV disinfection |
| Abstract |
A 3D model was developed to calculate the UV intensity of a submerged-type UV disinfection reactor. Numerical experiments were conducted by inputting the design factors of an open channel?type disinfection reactor and a pipe-type disinfection reactor that were
installed in an actual sewage treatment plant. The following data were obtained: The average UV intensity of the installed open channel?type reactor and pipe-type reactor was 7.87 mW/cm2 and 13.09 mW/cm2, respectively; the UV dose reflecting the UV irradiation time and taking into account attenuation effects such as mixing imbalance, lamp aging, temperature, and fouling, was expected to be 21.1 mJ/cm2 and 24.8 mJ/cm2, respectively, and these values are 5 % and 24 % higher than the target UV dose of 20 mJ/cm2, respectively.
By using the UV3D model, the optimal lamp position, which maximizes the average UV intensity without changing the size of the disinfection reactor or lamp output power, can be found. In this case, by only adjusting the lamp position, the average UV intensity can
be increased by 0.9 % for the open channel?type and 0.5 % for the pipe-type, respectively. A better average UV intensity can be obtained by model simulation. By adjusting the horizontal and vertical ratio of the open channel?type reactor and by moving the lamp position, the average UV intensity can be increased by 7.4 % more than the present case. |