8/21/2019 0.12. Equipsent http://slidepdf.com/reader/full/012-equipsent 1/7 04/09/2014 1 1 What Treatment Systems are on the Market? SAFEMED III – Ballast Water Training EMSA, Lisboa - 3 rd /4 th September 2014 Brian Elliott Senior Project Officer for Environmental Protection EMSAWhy Ballast Water Management? • Approximately 3-4000 million t discharged every year in ports • More than 10000 marine species transported every day in ballast water accross the oceans • Serious disturbance or alteration of ecosystems by invasive alien species (IAS) • Ballast water most significant pathway of unintentional introduction of IAS • Possible major socio-economic damage • Possible threats to human health, e. g. through consumption of contaminated food 2
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
8/21/2019 0.12. Equipsent
http://slidepdf.com/reader/full/012-equipsent 1/7
04/09/2014
1
1
What Treatment Systems are on theMarket?
SAFEMED III – Ballast Water Training
EMSA, Lisboa - 3rd/4th September 2014
Brian Elliott
Senior Project Officer for Environmental Protection
EMSA
Why Ballast Water Management?
• Approximately 3-4000 million t discharged every year in ports
• More than 10000 marine species transported every day in ballastwater accross the oceans
• Serious disturbance or alteration of ecosystems by invasive alienspecies (IAS)
• Ballast water most significant pathway of unintentionalintroduction of IAS
• Possible major socio-economic damage
• Possible threats to human health, e. g. through consumption of
contaminated food
2
8/21/2019 0.12. Equipsent
http://slidepdf.com/reader/full/012-equipsent 2/7
04/09/2014
2
Why Ballast Water Treatment?
• Considered BW reception facilities
• Large amount of Ballast Water
• High cost for providing infrastucture
• Not all BW is discharged in ports
• Ships need to discharge at see to maintain stability andsafety.
• Ships need to discharge BW to enter shallow seas
• Ships need to discharge ballast water to enter port
• In order to catch and reduce all risks then treatment onship is the only option
Ultraviolet irradiation: most well established method; wellknown to be effective against wide range of micro-organisms(e. g. viruses and cysts); relies on good UV transmissionthrough the water ―> clear water and unfouled clean quartzsleeves needed for effectiveness; removal of water turbidityessential; UV can be enhanced by combining with anotherreagent, such as ozone, hydrogen dioxide or titanium dioxide
Deoxygenation: takes a couple of days to come into effectdue to the length of time it takes organisms to beasphyxiated
Cavitation: acts at the surface of the micro-organism anddisrupts the cell wall through the collapse of micro bubbles