摘要: |
Maritime transport is of fundamental importance to Europe and the rest of the world. Over 90% of the European Union's external trade goes by sea and more than 1 billion tons of freight a year are loaded and unloaded in EU ports (European Maritime Safety Agency). The transfer of species in ballast water has been going on for as long as the shipping trade. The movement of some 3 to 12 billion tons of ballast water in ships internationally each year has been responsible for the settlement of about 100 million tons of sediment. Its cleaning and the disposal of the ballast sludge produced involve enormous costs as well as job hazards and time. Furthermore, as the sediment cannot be removed, the freight capacity of the ship decreases with time and stability problems arise. Besides these economic aspects, ballast water (BW) has been recognized as a major vector for the translocation of aquatic species across biogeographical boundaries. It is estimated that as many as 10 000 alien species of plants and animals are transported per day in ships around the world. As ships travel faster and world trade grows, organisms are better able to survive the journey, using the settled sediments as a substrate, but the threat of invasive species from ballast water increases. Thus with a reduction of sediment settlement in ballast tanks, a significantly reduced danger from alien organisms can be expected. The aim of the project is the development of a new hybrid BW treatment technology (UV, filters and electrolysis) into a self-controlled BW treatment system. The main objective of the proposed project is the invention of an effective treatment technology incorporating non permanent, seawater-generated active substances as a necessary measure to UV and Filter treatment technology. By producing active substances through electrolysis of sea water, there will be no need to carry or store hazardous and corrosive chemicals onboard ships. It also represents a more economical alternative to using chemicals for treating large volume of ballast water onboard ships. |