H. Taligrot, M. Monnot, J. Ollivier, C. Cordier, N. Jacquet, et al.. Retention of the Tulane virus, a norovirus surrogate, by ultrafiltration in seawater and production systems. Aquaculture, 2022, 553, pp.738096. ⟨10.1016/j.aquaculture.2022.738096⟩. ⟨hal-04063881⟩ Plus de détails...
Shellfish as a foodstuff must meet sanitary quality objectives for the protection of consumers and this quality is closely linked to the water. The oyster industry considered this challenge related to contaminations and currently, the major risk of disease is due to the presence of norovirus (NoV) since all oyster-consuming countries report outbreaks of gastroenteritis linked to the presence of this microorganism. Ultrafiltration has already demonstrated to be efficient for viral protection of oyster farms in previous studies. In this work, retention by ultrafiltration of Tulane virus, a NoV surrogate, was evaluated. The effect of virus concentration in the feed on the ultrafiltration efficiency has been assessed. Low retentions of about 1 log were observed at the lowest viral concentrations. At higher concentrations, an increase of retention up to 5 log was obtained. These results highlight the potential overestimation of UF efficiency during laboratory experiments realized at high concentrations, compared to low concentrations found in environmental resources. In agreement with other studies, higher retentions at high concentrations could be explained by formation of viral aggregates, which could facilitate the steric exclusion but also modify the electrostatic and hydrophobic interactions between isolated viruses/aggregates and membrane. Virus retentions with a fresh mineral water (Evian water) and seawater were compared. Seawater achieved higher retention rates for Tulane virus due to the membrane fouling.
H. Taligrot, M. Monnot, J. Ollivier, C. Cordier, N. Jacquet, et al.. Retention of the Tulane virus, a norovirus surrogate, by ultrafiltration in seawater and production systems. Aquaculture, 2022, 553, pp.738096. ⟨10.1016/j.aquaculture.2022.738096⟩. ⟨hal-04063881⟩
H. Taligrot, M. Monnot, J. Ollivier, C. Cordier, N. Jacquet, et al.. Retention of the Tulane virus, a norovirus surrogate, by ultrafiltration in seawater and production systems. Aquaculture, 2022, 553, pp.738096. ⟨10.1016/j.aquaculture.2022.738096⟩. ⟨hal-03967224⟩ Plus de détails...
Shellfish as a foodstuff must meet sanitary quality objectives for the protection of consumers and this quality is closely linked to the water. The oyster industry considered this challenge related to contaminations and currently, the major risk of disease is due to the presence of norovirus (NoV) since all oyster-consuming countries report outbreaks of gastroenteritis linked to the presence of this microorganism. Ultrafiltration has already demonstrated to be efficient for viral protection of oyster farms in previous studies. In this work, retention by ultrafiltration of Tulane virus, a NoV surrogate, was evaluated. The effect of virus concentration in the feed on the ultrafiltration efficiency has been assessed. Low retentions of about 1 log were observed at the lowest viral concentrations. At higher concentrations, an increase of retention up to 5 log was obtained. These results highlight the potential overestimation of UF efficiency during laboratory experiments realized at high concentrations, compared to low concentrations found in environmental resources. In agreement with other studies, higher retentions at high concentrations could be explained by formation of viral aggregates, which could facilitate the steric exclusion but also modify the electrostatic and hydrophobic interactions between isolated viruses/aggregates and membrane. Virus retentions with a fresh mineral water (Evian water) and seawater were compared. Seawater achieved higher retention rates for Tulane virus due to the membrane fouling.
H. Taligrot, M. Monnot, J. Ollivier, C. Cordier, N. Jacquet, et al.. Retention of the Tulane virus, a norovirus surrogate, by ultrafiltration in seawater and production systems. Aquaculture, 2022, 553, pp.738096. ⟨10.1016/j.aquaculture.2022.738096⟩. ⟨hal-03967224⟩
N. Jacquet, S. Wurtzer, G. Darracq, Yvan Wyart, L. Moulin, et al.. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production. Journal of Membrane Science, 2021, 634, pp.119417. ⟨10.1016/j.memsci.2021.119417⟩. ⟨hal-03514692⟩ Plus de détails...
Removal of pathogenic microorganisms as viruses during drinking water production was evaluated by ultrafiltration. Two enteric viruses (ADV 41 and CV-B5) were compared to the MS2 bacteriophage, largely used in literature and by membrane producers as enteric virus surrogate. The effect of feed concentration of viruses on the ultrafiltration efficiency has been assessed. For the three viruses, low retentions about 1 log were observed at the lowest concentrations. At higher concentrations, an increase of removal up to 3.0 log for CV-B5 and MS2 phage and 3.5 log for ADV 41 was observed. These results highlight the potential overestimation of UF efficiency during laboratory experiments realized at high concentrations, compared to low concentrations found in environmental resources used for drinking water production. Virus removals with Evian water and real groundwater were compared and groundwater achieved similar or slightly higher removals for the three viruses. Finally, impact of membrane ageing after chlorine exposure was checked. It was observed that membrane degradations, visible by a water permeability increase with exposure dose did not affect the removal of viruses at low feed concentrations.
N. Jacquet, S. Wurtzer, G. Darracq, Yvan Wyart, L. Moulin, et al.. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production. Journal of Membrane Science, 2021, 634, pp.119417. ⟨10.1016/j.memsci.2021.119417⟩. ⟨hal-03514692⟩
N. Jacquet, S. Wurtzer, G. Darracq, Yvan Wyart, L. Moulin, et al.. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production. Journal of Membrane Science, 2021, 634, pp.119417. ⟨10.1016/j.memsci.2021.119417⟩. ⟨hal-03597528⟩ Plus de détails...
Removal of pathogenic microorganisms as viruses during drinking water production was evaluated by ultrafiltration. Two enteric viruses (ADV 41 and CV-B5) were compared to the MS2 bacteriophage, largely used in literature and by membrane producers as enteric virus surrogate. The effect of feed concentration of viruses on the ultrafiltration efficiency has been assessed. For the three viruses, low retentions about 1 log were observed at the lowest concentrations. At higher concentrations, an increase of removal up to 3.0 log for CV-B5 and MS2 phage and 3.5 log for ADV 41 was observed. These results highlight the potential overestimation of UF efficiency during laboratory experiments realized at high concentrations, compared to low concentrations found in environmental resources used for drinking water production. Virus removals with Evian water and real groundwater were compared and groundwater achieved similar or slightly higher removals for the three viruses. Finally, impact of membrane ageing after chlorine exposure was checked. It was observed that membrane degradations, visible by a water permeability increase with exposure dose did not affect the removal of viruses at low feed concentrations.
N. Jacquet, S. Wurtzer, G. Darracq, Yvan Wyart, L. Moulin, et al.. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production. Journal of Membrane Science, 2021, 634, pp.119417. ⟨10.1016/j.memsci.2021.119417⟩. ⟨hal-03597528⟩
Eric Serre, Sandrine Hugues, Emilia Crespo del Arco, Anthony Randriamampianina, Patrick Bontoux. Axisymmetric and three-dimensional instabilities in an Ekman boundary layer flow. International Journal of Heat and Fluid Flow, 2001, 22 (1), pp.82-93. ⟨hal-01023080⟩ Plus de détails...
Eric Serre, Sandrine Hugues, Emilia Crespo del Arco, Anthony Randriamampianina, Patrick Bontoux. Axisymmetric and three-dimensional instabilities in an Ekman boundary layer flow. International Journal of Heat and Fluid Flow, 2001, 22 (1), pp.82-93. ⟨hal-01023080⟩
Journal: International Journal of Heat and Fluid Flow
