To control non-indigenous species invasion via ship ballast water

the International Maritime Organization（IMO）had adopted the International Convention for the Control and Management of Ship’s Ballast Water and Sediments in 2004

stated that all ships are required to install ballast water treatment systems approved by IMO.However

the treati

ng effects of ballast water treatment systems installed in ships do not always reach the IMO standard till now. It is necessary to develop the emergency technology for ballast water treatment. In this study

the partition simulated plasma generator based on the strong electric-field discharge formed by glow and streamer at atmospheric pressure were used to prepare high concentration of active particles

which could result in the efficient generation of hydroxyl radical in water collaborating with hydrodynamic cavitation technology. A treating equip-ment consisted of the high concentration of active particles preparing unit

hydrodynamic cavitation unit

liquid dissolving unit and residual oxidant removing unit

was developed to prevent and control non-indigenous marine organism invasion risk in case of emergency. The treating equipment was used to run the field experimentsof seawater in Dalian Port. The results show that when the water volume was 30

4

0 t/h and phytoplankton concentration was2.6×10

4

cells/L

3

.77 ×10

4

cells/m L

the killing rate for phytoplankton about the size of more than 10 microns was100%. The water quality were improved significantly

and the treatment effect met the discharge standard of IMO.The treating equipment can provide effective technical means for preventing and controlling non-indigenous marine organism invasion in China.