Pilot-Scale Evaluation of GAC Adsorption Using Low-Cost, High-Performance Materials for Removal of Pesticides and Organic Matter in Drinking Water Production

2013 ◽  
Vol 139 (7) ◽  
pp. 958-965 ◽  
Author(s):  
Thi Thuy Pham ◽  
Viet Anh Nguyen ◽  
Bart Van der Bruggen
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
High Performance ◽  
Low Cost ◽  
Pilot Scale ◽  
Water Production ◽  
Scale Evaluation ◽  
Drinking Water Production ◽  
Gac Adsorption

Coagulation/flocculation/ultrafiltration for natural organic matter removal in drinking water production

2004 ◽  
Vol 4 (5-6) ◽  
pp. 215-222 ◽  
Author(s):  
A.R. Costa ◽  
M.N. de Pinho
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Surface ◽  
Water Production ◽  
Cellulose Acetate Membranes ◽  
Wide Range ◽  
Drinking Water Production

Membrane fouling by natural organic matter (NOM), namely by humic substances (HS), is a major problem in water treatment for drinking water production using membrane processes. Membrane fouling is dependent on membrane morphology like pore size and on water characteristics namely NOM nature. This work addresses the evaluation of the efficiency of ultrafiltration (UF) and Coagulation/Flocculation/UF performance in terms of permeation fluxes and HS removal, of the water from Tagus River (Valada). The operation of coagulation with chitosan was evaluated as a pretreatment for minimization of membrane fouling. UF experiments were carried out in flat cells of 13.2×10−4 m2 of membrane surface area and at transmembrane pressures from 1 to 4 bar. Five cellulose acetate membranes were laboratory made to cover a wide range of molecular weight cut-off (MWCO): 2,300, 11,000, 28,000, 60,000 and 75,000 Da. Severe fouling is observed for the membranes with the highest cut-off. In the permeation experiments of raw water, coagulation prior to membrane filtration led to a significant improvement of the permeation performance of the membranes with the highest MWCO due to the particles and colloidal matter removal.

Removal of natural organic matter by ultrafiltration and nanofiltration for drinking water production

Desalination ◽  
2004 ◽  
Vol 169 (3) ◽  
pp. 223-230 ◽  
Author(s):  
I. Mijatović ◽  
M. Matošić ◽  
B. Hajduk Černeha ◽  
D. Bratulić
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Water Production ◽  
Drinking Water Production

Removal of natural organic matter by ultrafiltration and nanofiltration for drinking water production

Desalination ◽  
2004 ◽  
Vol 169 (3) ◽  
pp. 223-230 ◽  
Author(s):  
I MIJATOVIC ◽  
M MATOSIC ◽  
B HAJDUKCERNEHA ◽  
D BRATULIC
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Water Production ◽  
Drinking Water Production

The role of pH on the ultrafiltration for drinking water production in Algarve (Portugal)

2002 ◽  
Vol 2 (5-6) ◽  
pp. 367-371 ◽  
Author(s):  
M. Ribau Teixeira ◽  
H. Lucas ◽  
M.J. Rosa
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Surface Waters ◽  
Membrane Fouling ◽  
Electrostatic Repulsion ◽  
Water Production ◽  
Ph Values ◽  
Drinking Water Production

The effect of the pH on the ultrafiltration performance of natural surface waters with moderate NOM content was evaluated at a laboratory scale using a plate-and-frame polysulphone membrane of 47 kDa MWCO. The results at three different pH values (acid, neutral and basic) demonstrated the important role of the pH on the ultrafiltration (UF) performance controlling the membrane - fouling matter interactions. The higher fluxes and lower natural organic matter (NOM) rejections obtained, at basic pH when compared to acid pH, are explained in terms of the variation of membrane and NOM charge, due to electrostatic repulsion and adsorption effects.

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