title: Adsorption combined with ultrafiltration to remove organic matter from seawater.
abstract: Organic fouling and biofouling are the major severe types of fouling of reverse osmosis (RO) membranes in seawater (SW) desalination. Low pressure membrane filtration such as ultrafiltration (UF) has been developed as a pre-treatment before reverse osmosis. However, UF alone may not be an effective enough pre-treatment because of the existence of low-molecular weight dissolved organic matter in seawater. Therefore, the objective of the present work is to study a hybrid process, powdered activated carbon (PAC) adsorption/UF, with real seawater and to evaluate its performance in terms of organic matter removal and membrane fouling. The effect of different PAC types and concentrations is evaluated. Stream-activated wood-based PAC addition increased marine organic matter removal by up to 70% in some conditions. Moreover, coupling PAC adsorption with UF decreased UF membrane fouling and the fouling occurring during short-term UF was totally reversible. It can be concluded that the hybrid PAC adsorption/UF process performed in crossflow filtration mode is a relevant pre-treatment process before RO desalination, allowing organic matter removal of 75% and showing no flux decline for short-term experiments.
authors: Université de Toulouse, INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, France.
authors: Chatkaew
authors: C
authors: Tansakul
authors: Stéphanie
authors: S
authors: Laborie
authors: Corinne
authors: C
authors: Cabassud
mesh_terms: D000327:Adsorption; D057219:Biofouling; D002244:Carbon / Q000032:analysis; D002606:Charcoal / Q000737:chemistry; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D009930:Organic Chemicals / Q000302:isolation & purification*; D010539:Permeability; D011208:Powders; D012212:Rheology; D012623:Seawater / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties; D013997:Time Factors; D014462:Ultrafiltration / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification
chemical_list: D008567:Membranes, Artificial; D009930:Organic Chemicals; D011208:Powders; D014874:Water Pollutants, Chemical; D002606:Charcoal; D002244:Carbon