Removal of iron using an oxidation and ceramic microfiltration hybrid process for drinking water treatment
Résumé
In this study, we investigated a hybrid oxidation/microfiltration (MF) process for the continuous treatment of water containing iron. Synthetic iron waters were continuously added to an aerated tank and filtered using a Kerasep ceramic membrane (Novasep, France) coupled to the aerated reactor. The iron removal and the filtration flux were measured for several parameters: pH and iron concentration of the feed solution and transmembrane pressure (TMP). The results obtained showed a very high iron removal whatever the conditions used, as well as a constant filtration flux versus time.
It is suggested that the mechanisms of iron removal are related to steric rejection of the ferric hydroxide particles formed. The constant filtration flux suggested low membrane fouling which may be due to the large size of the ferric hydroxide particles. Dead-end filtration was also performed with acetate cellulose and polycarbonate membranes showing a strong effect of the membrane material. Finally, a groundwater from Gremda location (Sfax, Tunisia) was treated successfully since a quasi-constant permeate flux around 900 L/h•m 2 was obtained and a total iron removal was achieved.
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Fakhfekh et al. - 2017 - Removal of iron using an oxidation and ceramic mic.pdf (1.43 Mo)
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