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Development of the method for ballast water treatment on sea vessels for the protection of marine ecosystems from the inroduction of alien species : doctoral dissertation
Cvetković, Martina (Author), Kompare, Boris (Mentor) More about this mentor... This link opens in a new window, Steinman, Franci (Co-mentor), Turk, Valentina (Co-mentor), Mikoš, Matjaž (Thesis defence commission member), Toman, Mihael Jožef (Thesis defence commission member), Faganeli, Jadran (Thesis defence commission member), Dular, Matevž (Thesis defence commission member)

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Abstract
Ballast water is considered as one of the most important factors of the worldwide transfer of invasive alien species in aquatic ecosystems. With the aim of preventing and stopping the spread of the transfer of invasive organisms in aquatic ecosystems and in accordance with IMO’s International Convention for the Control and Management of Ships Ballast Water and Sediments, different systems for ballast water treatment have been developed so far. While existing technologies for ballast water treatment have their own advantages and disadvantages, the application of hydrodynamic cavitation (HC), successfully used technology in many different areas with the aim of destroying the organisms or disinfection, remained insufficiently researched. As a part of the doctoral thesis, the detailed research of possibilities for use of hydrodynamic cavitation in ballast water treatment area was conducted. Based on the experiences with the hydrodynamic cavitation presented in the literature, three new pilot systems whose operation included combination of hydrodynamic cavitation as a main step of the treatment and separation as a pre-treatment phase were constructed. The pilot system which showed the highest effectiveness was chosen for the continuation of the experiments to determine the impact on destroying the selected marine organisms. Biological experiments were performed to evaluate the morphological changes and viability of the representatives of zooplankton (copepods), Artemia salina cysts, and the growth potential of marine bacteria after the exposure to the treatment in different duration. The results of the tests confirmed a significant efficiency of the treatment on all tested organisms.

Language:English
Keywords:environment protection, thesys, invasive species, ballast water management, ballast water treatment systems, International Convention for the Control and Management of Ships Ballast Water and Sediments, hydrodynamic cavitation, separation, zooplankton, marine bacteria
Work type:Dissertation (m)
Tipology:2.08 - Doctoral Dissertation
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2016
Publisher:[M. Cvetković]
Number of pages:XXIV, 148 str.
UDC:628.16.628.3:629.123.4:(043)
COBISS.SI-ID:7679329 Link is opened in a new window
Views:164
Downloads:162
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Secondary language

Language:Slovenian
Title:Razvoj metode obdelave balastnih vod na morskih plovilih s ciljem zaščite morskih ekosistemov pred vnosom tujerodnih vrst : doktorska disertacija
Abstract:
Balastne vode so eden najpomembnejših dejavnikov prenosa invazivnih tujerodnih vrst v vodnih ekosistemih po svetu. Za preprečevanje in zaustavljanje obsega širjenja invazivnih organizmov v vodnih ekosistemih so se, v skladu z IMO Mednarodno konvencijo za nadzor in ravnanje z ladijskimi balastnimi vodami in sedimenti, doslej razvili že različni sistemi za obdelavo balastnih voda. Ker pa imajo obstoječe tehnologije za obdelavo balastnih voda svoje prednosti in slabosti, se je raziskala še uporabnost hidrodinamične kavitacije, ki je bila doslej sicer uspešno uporabljena že na različnih področjih za uničevanje organizmov ali dezinfekcije. Ker pa še ni dovolj raziskana na področju obdelave balastnih voda, je bila v okviru doktorske disertacije opravljena poglobljena raziskava o možnostih uporabe hidrodinamične kavitacije na tem področju. Na podlagi znanih teorij in izkušenj s hidrodinamično kavitacijo iz razpoložljive literature so bile konstruirane tri nove pilotne naprave, katerih delovanje povezuje proces hidrodinamične kavitacije kot glavnega koraka obdelave, in separacije kot predobdelave balastnih voda. S serijo meritev in opazovanjem intenzivnosti kavitacijskih pojavov je bil poiskan pilotni sistem, ki je pokazal največjo učinkovitost. Na slednjem je potekala druga (biološka) faza poizkusov, v kateri se je določal učinek, tj. obseg poškodovanja izbranih vrst morskih organizmov. Biološki eksperimenti so podali ugotovljene morfološke spremembe in preživetje predstavnikov zooplanktona (kopepodov) in cist Artemie saline, ter oceno rastnega potenciala morskih bakterij, ki so bili izpostavljeni različnim časom trajanja obdelave. Rezultati so potrdili veliko učinkovitost razvitega načina obdelave na vseh testiranih organizmih.

Keywords:varstvo okolja, disertacije, invazivne vrste, upravljanje z balastnimi vodami, sistemi za obdelavo balastnih voda, mednarodna konvencija za nadzor in upravljanje z ladijskimi balastnimi vodami in sedimentom, hidrodinamična kavitacija, separacija, zooplankton, morske bakterije

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