Evaluation of disinfection efficacy and chemical formation using MPUV ballast water treatment system (GloEn-PatrolTM)

This study was undertaken to evaluate the efficacy of inactivation of several indigenous marine species and the formation of oxidants and other by-products using medium-pressure ultraviolet (MPUV) ballast water treatment. The ballast water treatment system (BWTS) used in this study was composed of filtration modules as a pretreatment process, followed by a UV irradiation process equipped with a polychromatic MPUV lamp. The experiments were performed on seawater (Busan,>32 PSU) and brackish water (Nakdong River, 20–22 PSU) with flow rates of 50 and 250 m3/h. The disinfection efficacy of the system was evaluated using indigenous species (>50 μ m and 10–50 μ m) and surrogate microorganisms (E. coli and Enterococci group). The test results successfully met the D-2 regulation of the IMO (International Marine Organization). In addition, oxidants, such as H2O2, total residual oxidants (TRO) and OH radicals, and potential halogenated by-products, such as haloacetic acids, trihalomethanes and total organic halides...