| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 151117 | Chemical Engineering Journal | 2011 | 5 Pages |
Ballast water transfers aquatic species among ports and poses biological threat to the world's oceans. This work investigated the use of combined ultraviolet (UV)/Ag–TiO2 + ozone (O3) processes for ballast water treatment using Escherichia coli and Vibrio alginolyticus as indicator microorganisms. In all tests, the V. alginolyticus cells are more resistant to UV/O3 inactivation than are the E. coli cells. Bacterial cells under stressing stimulated activities of antioxidants for their protection. The combined UV + O3 and UV/Ag–TiO2 + O3 tests yield synergistic removal of both strains compared with individual tests. The combined UV/Ag–TiO2 + O3 process is potentially applicable for onboard treatments for ballast waters.
► We investigated the use of combined ultraviolet (UV)/Ag–TiO2 + ozone (O3) processes for ballast water treatment using Escherichia coli and Vibrio alginolyticus as indicators. ► The combined UV + O3 and UV/Ag–TiO2 + O3 tests yield synergistic removal of both strains compared with individual tests. ► V. alginolyticus cells are more resistant to UV/O3 inactivation than are the E. coli cells. ► Direct damage by oxidation or irradiation rather than action of yielded total residual oxidants in activated cells in ballast waters.
