| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Removal of pathogens by ultrafiltration from sea water
|
| Autores: |
Cordier, Clémence
Stavrakakis, Christophe
Morga, Benjamin
Degrémont, Lionel
Voulgaris, Alexandra
Bacchi, Alessia
Sauvade, Patrick
Coelho, Franz
Moulin, Philippe
|
| Data: |
2020-09
|
| Ano: |
2020
|
| Palavras-chave: |
Ultrafiltration
Biosecurisation
Pathogen retention
Sea water
OsHV-1
Shellfish production
|
| Resumo: |
Among water treatment processes, ultrafiltration is known to be efficient for the elimination of micro-organisms (bacteria and viruses). In this study, two pathogens were targeted, a bacterium, Vibrio aestuarianus and a virus, OsHV-1, with the objective to produce high quality water from seawater, in the case of shellfish productions. The retention of those microorganisms by ultrafiltration was evaluated at labscale. In the case of OsHV-1, the protection of oysters was validated by in vivo experiments using oysters spat and larvae, both stages being highly susceptible to the virus. The oysters raised using contaminated seawater which was then subsequently treated by ultrafiltration, had similar mortality to the negative controls. In the case of V. aestuarianus, ultrafiltration allowed a high retention of the bacteria in seawater with concentrations below the detection limits of the 3 analytical methods (flow cytometry, direct seeding and seeding after filtration to 0.22 µm). Thus, the quantity of V. aestuarianus was at least, 400 times inferior to the threshold known to induce mortalities in oysters. Industrial scale experiment on a several months period confirmed the conclusion obtained at lab scale on the Vibrio bacteria retention. Indeed, no bacteria from this genus, potentially harmful for oysters, was detected in permeate and this, whatever the quality of the seawater treated and the bacteria concentration upstream of the membrane. Moreover, the resistance of the process was confirmed with a stability of hydraulic performances over time for two water qualities and even facing an algal bloom. In terms of retention and resistance, ultrafiltration process was validated for the treatment of seawater towards the targeted pathogenic microorganisms, with the aim of biosecuring shellfish productions.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00634/74576/74466.pdf
DOI:10.1016/j.envint.2020.105809
https://archimer.ifremer.fr/doc/00634/74576/
|
| Editor: |
Elsevier BV
|
| Formato: |
application/pdf
|
| Fonte: |
Environment International (0160-4120) (Elsevier BV), 2020-09 , Vol. 142 , P. 105809 (12p.)
|
| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
|
|
