Investigating submerged ultrafiltration (UF) and microfiltration (MF) membranes for seawater pre-treatment dedicated to total removal of undesirable micro-algae

被引：83

作者：

Castaing, J. -B. ^{[1
,3
]}

Masse, A. ^{[1
]}

Pontie, M. ^{[1
]}

Sechet, V. ^{[2
]}

Haure, J. ^{[3
]}

Jaouen, P. ^{[1
]}

机构：

[1] Univ Nantes, CRTT,UMR 6144, CNRS,GEPEA, Lab GEnie Procedes Environm & Agroalimentaire, F-44602 St Nazaire, France

[2] Ctr Nantes, Lab Phycotoxines, IFREMER, F-44311 Nantes, France

[3] IFREMER, Lab Conchylicole Pays Loire, F-85230 Polder Des Champs, Bouin, France

来源：

DESALINATION | 2010年 / 253卷 / 1-3期

关键词：

Toxic micro-algae; Submerged membranes; Microfiltration; Ultrafiltration; Fouling; Autopsy; FLOW FILTRATION SYSTEMS; HARMFUL ALGAL BLOOMS; ALEXANDRIUM-MINUTUM; HETEROCAPSA-TRIQUETRA; FOULING PHENOMENON; TOXIN COMPOSITION; RED-TIDE; WATER; BIOREACTOR; MANAGEMENT;

D O I：

10.1016/j.desal.2009.11.031

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, an original use of low-energy-consuming submerged MF/UF membranes was investigated for the total removal of toxic micro-algae (Alexandrium sp.) from seawater Experimentally, a non-toxic micro-alga (Heterocapsa triquetra) which has morphological and dimensional (15-20 mu m) similarities with Alexandrium sp. one of the smallest toxic micro-algae in seawater, was ultra- and micro-filtered A lab-scale membrane screening was operated on 10 kDa. 300 kDa and 0 2 mu m membranes by filtration of 30,000 cells mL(-1) of H triquetra suspension (equivalent to a major natural phytoplanktonic bloom) The most promising results were obtained with microfiltration membrane (0 2 mu m). the highest steady state permeate flux reached 29 L h(-1) m(-2) under 0 3 bar of transmembrane pressure after 180 min of filtration. More than 99%, 87% and 98% of micro-algae, Total Suspended Solid (TSS). and turbidity were eliminated. respectively. Combining hydraulic permeability versus time with modified fouling index (MFI) determination and membrane autopsy (FEG-SEM and AFM observations), it is observed that fouling is mainly due to cake formation (C) 2009 Elsevier B V All rights reserved

引用

页码：71 / 77

页数：7