A pilot-scale experiment of 20 t/h for the treatment of ship’s ballast water is re-ported in this paper. When the concentration of the dissolved OH· was 0.68 mg/L during theexperiment, the rate of destroying bacteria, mono-algae, protozoan reached 100% within 2.67 s.The effect of hydroxyl radicals on biochemical processes was also studied. The attenuation rateof photosynthesis pigment was 100%. And the main reason for the cells’ death was the strongdestruction of the monose, amylose, protein, DNA and RNA in the cells. As an advanced oxida-tion method, the procedure can destroy invasive marine species when a ship is in the process ofdischarging its ballast water.
The high ratio concentration hydroxyl solution is produced by strong discharge, and applied to the prevention of invasive species in ship ballast water and red tide. This paper introduces the plasma process of hydroxyl radical production, the production process of high ratio hydroxyl solution, and the application to treating ballast water and red tide.
