Impact of granular filtration on ultrafiltration membrane performance as pre-treatment to seawater desalination in presence of algal blooms
| Type | Article | ||||||||
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| Date | 2018-06 | ||||||||
| Language | English | ||||||||
| Author(s) | Sabiri Nour-Eddine1, Sechet Veronique 2, Jaouen Pascal1, Pontie Maxime1, Masse Anthony1, Plantier Severine1 |
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| Affiliation(s) | 1 : Univ Nantes, GEPEA, UMR CNRS 6144, 37 Bd Univ,BP 406, St Nazaire, France. 2 : Ctr Nantes, IFREMER, Lab Phycotoxines, BP 21105, F-44311 Nantes, France. |
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| Source | Journal Of Water Reuse And Desalination (2220-1319) (Iwa Publishing), 2018-06 , Vol. 8 , N. 2 , P. 262-277 | ||||||||
| DOI | 10.2166/wrd.2017.114 | ||||||||
| WOS© Times Cited | 5 | ||||||||
| Keyword(s) | algal bloom, fouling, granular filtration, pre-treatment, seawater, ultrafiltration | ||||||||
| Abstract | To mitigate fouling of the ultrafiltration (UF) membrane and improve permeate quality, we coupled granular filters (GF) with UF membrane as a pre-treatment for reconstituted seawater in the presence of algal bloom. Mono and bilayer granular filtrations were led at a mean velocity of 10 m h(-1) over a 7-hour period. Both GF gave the same algal cell retention rate (similar to 63%) after 7 hours of filtration. Turbidity reduction rate was 50% for the monolayer filter and 75% for the bilayer filter. Resulting organic matter removal rate was 10% for the monolayer filter and 35% for the bilayer filter. Dissolved organic carbon removal was low (20%) with the bilayer filter and non-existent with the monolayer filter. GF-coupled UF reduced humic acids in the permeate (20%) compared with UF alone. Peak pressure of 3 bars was reached at the end of 30 minutes of UF in both direct UF or UF after monolayer GF. The filtrate from the bilayer GF enables UF over a longer period (7 hours). |
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