| Title |
Effect of Particulate Matter on the UV-Disinfection of Virus and Risk Assessment |
| Authors |
신유리 ( Yu Ri Shin ) ; 윤춘경 ( Chun Gyeong Yoon ) ; 이한필 ( Han Pu Rhee ) ; 이승재 ( Seung Jae Lee ) |
| Keywords |
MS2; Particulate matter; Suspended solid; Turbidity; Ultraviolet inactivation |
| Abstract |
Wastewater reuse for agricultural irrigation needs treatment and control of pathogens to minimize risks to human health and the environment. In order to evaluate the water quality of UV-treated reclaimed water, this study focused on the relationship between micro-pathogens and particulate matters. MS2 was selected as an index organism because it has similar characteristics to human enteric virus and strong resistance to UV disinfection. The turbidity and suspended solid (SS) were selected for test parameters. In this study, it was performed with different UV doses (30 and 60 mJ/cm2) for estimation of the MS2 inactivation rate using collimated beam batch experiments in the laboratory. The experiment results by turbidity or SS concentration presented that the increased concentration of them lowered MS2 inactivation. At the turbidity (below 4.27 NTU) and SS (below 1.47 mg/L) of the low level range, the inactivation of 60 UV dose is higher than 30 UV dose. However, at the turbidity and SS of the high level, the increasing UV dose did not show apparent increasing the MS2 inactivation. In quantitative microbial risk assessment (QMRA), it can confirm the trend that P(D) and turbidity concentrations have positive correlationship at the low concentration, which was also observed in SS. The QMRA can be helpful in communication with public for safe wastewater reuse and be recommended. |