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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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EL
| URI | http://purl.tuc.gr/dl/dias/76343D97-D4D6-4E95-BC24-252BBAF48FC6 | - |
| Identifier | https://doi.org/10.1002/jctb.7385 | - |
| Identifier | https://scijournals.onlinelibrary.wiley.com/doi/10.1002/jctb.7385 | - |
| Language | en | - |
| Extent | 10 pages | en |
| Title | Ballast water treatment by ozone nanobubbles | en |
| Creator | Seridou Petroula | en |
| Creator | Σεριδου Πετρουλα | el |
| Creator | Kotzia Eleftheria | en |
| Creator | Κοτζια Ελευθερια | el |
| Creator | Katris Konstantinos | en |
| Creator | Κατρης Κωνσταντινος | el |
| Creator | Kalogerakis Nikos | en |
| Creator | Καλογερακης Νικος | el |
| Publisher | Wiley | en |
| Description | This research was co-financed by Greece and the European Union (European Social Fund- ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning» in the context of the project ‘Strengthening Human Resources Research Potential via Doctorate Research’ (MIS-5000432) implemented by the State Scholarships Foundation (ΙΚΥ). | el |
| Content Summary | BACKGROUND The uncontrolled discharge of untreated ballast water, which is essential for a ship's optimal operation, is one of the major causes of sea environmental pollution by shipping. Among the disinfection methods available for ballast water treatment, ozonation is a commonly used method, but its performance is limited by the rapid ozone auto-decomposition rate. Nanobubbles (NBs) technology has attracted much scientific interest as it is characterized by a long residence time in the aqueous phase and a high surface area; therefore, ozone nanobubbles (OzNBs) are expected to enhance disinfection capacity and residual activity. The present study was designed to provide further insight into the inactivation of heterotrophic bacteria in saline water and to examine the use of OzNBs for disinfection of saline water. RESULTS The survival rate of Escherichia coli (E. coli), which was used as indicator microorganism, along with the ozone consumption at different salinities (1.5, 4, 8 and 15 PSU) and bacterial concentrations (107, 106, and 105 CFU mL−1) with and without supplementation of OzNBs were investigated. The results indicated a statistical difference in the residual concentration of total residual oxidants (TRO) with the presence of OzNBs at salinity level 1.5 PSU and at 4 PSU only at the lowest bacterial content. At a low salinity and high bacterial concentration, the concentration of TRO was 6-fold higher in the presence of OzNBs. CONCLUSION The salinity of water has a strong impact on the residual concentration of ozone. When salinity is increased, ozone reacts more rapidly with the bromide and chloride ions. The use of OzNBs exhibited a greater disinfection performance and higher residual activity. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by-nc-nd/4.0/ | en |
| Date of Item | 2025-03-28 | - |
| Date of Publication | 2024 | - |
| Subject | Ozone nanobubbles | en |
| Subject | Seawater disinfection | en |
| Subject | E. coli | en |
| Bibliographic Citation | P. Seridou, E. Kotzia, K. Katris and N. Kalogerakis, “Ballast water treatment by ozone nanobubbles,” J. Chem. Technol. Biotechnol., vol. 99, no. 10, pp. 2139–2148, Oct. 2024, doi: 10.1002/jctb.7385. | en |
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