Abstract
The ballast water of oceanic ships is the main cause for worldwide transfer of non-indigenous aquatic species. The use of hydroxyl radicals is an efficient method for killing the aquatic species in ballast water. For practical application, a 250 t/h ·OH ballast water-treatment system was designed and installed on the ship Yulong (ten thousand tons) in Dalian harbor. On this ship, a series of experiments were carried out. As a result, the concentration of total oxidants declined over time. Harmful aquatic organisms and pathogens in the ballast water were rapidly killed after ·OH treatment and no re-growth was observed during a storage time of 5 days. The quality of the ballast water was considerably improved. Therefore, the D-2 ballast water discharge standard of the International Maritime Organization was satisfied. Compared with current methods, ·OH treatment is a potentially effective technology which can be practically applied in the ballast water-treatment of oceanic ships in the future.
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Acknowledgments
The work was supported by Projects of Distinguished Young and General Program from National Natural Science Foundation of China (NSFC: 61025001; 50877005), “Cheung Kong Scholars” Program and National 863 Program (No. 2012AA062609) from Education Ministry of China.
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Bai, M., Zhang, Z., Zhang, N. et al. Treatment of 250 t/h Ballast Water in Oceanic Ships Using ·OH Radicals Based on Strong Electric-Field Discharge. Plasma Chem Plasma Process 32, 693–702 (2012). https://doi.org/10.1007/s11090-012-9369-9
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DOI: https://doi.org/10.1007/s11090-012-9369-9