Impact of granular filtration on ultrafiltration membrane performance as pre-treatment to seawater desalination in presence of algal blooms

Type Article
Date 2018-06
Language English
Author(s) Sabiri Nour-Eddine1, Sechet VeroniqueORCID2, Jaouen Pascal1, Pontie Maxime1, Masse Anthony1, Plantier Severine1
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.
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 1
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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Sabiri Nour-Eddine, Sechet Veronique, Jaouen Pascal, Pontie Maxime, Masse Anthony, Plantier Severine (2018). Impact of granular filtration on ultrafiltration membrane performance as pre-treatment to seawater desalination in presence of algal blooms. Journal Of Water Reuse And Desalination, 8(2), 262-277. Publisher's official version : https://doi.org/10.2166/wrd.2017.114 , Open Access version : https://archimer.ifremer.fr/doc/00442/55315/