scholarly journals Effect of pre-treatment on membrane fouling of PVDF (Polyvinylidene Fluoride) microfiltration membrane with different structures in a pilot-scale drinking water production system

2007 ◽  
Vol 5 (2) ◽  
pp. 79-85 ◽  
Author(s):  
S. R. Chae ◽  
H. Yamamura ◽  
K. Ikeda ◽  
G. Ozawa ◽  
Y. Watanabe
Keyword(s):  
Drinking Water ◽  
Membrane Fouling ◽  
Production System ◽  
Polyvinylidene Fluoride ◽  
Pilot Scale ◽  
Water Production ◽  
Microfiltration Membrane ◽  
Drinking Water Production ◽  
Pre Treatment

Pilot plant trials: management of membrane concentrate

2010 ◽  
Vol 10 (4) ◽  
pp. 591-599
Author(s):  
N. Vigneron-Larosa ◽  
A.-S. Lescourret ◽  
A. Bignon ◽  
C. Breda ◽  
B. Bozkaya-Schrotter ◽  
...  
Keyword(s):  
Drinking Water ◽  
Natural Organic Matter ◽  
Contact Time ◽  
Suspended Solids ◽  
Fixed Bed ◽  
Pilot Scale ◽  
Water Production ◽  
Drinking Water Production ◽  
Pre Treatment ◽  
Plant Trials

In surface water nanofiltration (NF) for drinking water production, 15 to 25% of the feed is rejected by the membranes. Two complementary approaches are investigated in order to manage concentrates. On one hand, an additional NF stage allows an increase in the yield of drinking water production from 85 to 94%. Thirty-days filtration cycles are achieved. Conductivity, natural organic matter (NOM) and micropollutant contents of permeate fully satisfy drinking water standards. On the other hand removal of phosphonates, micropollutants and NOM is investigated in order to treat the concentrate before disposal. Phosphorus is removed by adsorption on pre-treatment sludge: removal reaches 82% with 100 ppm of suspended solids. To eliminate pesticides and NOM, adsorption on granular activated carbon (GAC) is studied with pilot scale fixed bed columns. Within 20 minutes contact time, selected pesticides are completely eliminated. NOM removal is approximately 30% with wood based GAC.

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.

Membrane fouling control in ultrafiltration technology for drinking water production: A review

Desalination ◽  
2011 ◽  
Vol 272 (1-3) ◽  
pp. 1-8 ◽  
Author(s):  
Wei Gao ◽  
Heng Liang ◽  
Jun Ma ◽  
Mei Han ◽  
Zhong-lin Chen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Membrane Fouling ◽  
Water Production ◽  
Fouling Control ◽  
Drinking Water Production

scholarly journals Adsorption/Coagulation/Ceramic Microfiltration for Treating Challenging Waters for Drinking Water Production

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 91
Author(s):  
Margarida Campinas ◽  
Rui M. C. Viegas ◽  
Rosário Coelho ◽  
Helena Lucas ◽  
Maria João Rosa
Keyword(s):  
Drinking Water ◽  
Membrane Fouling ◽  
Complete Removal ◽  
Pilot Scale ◽  
Quality Parameters ◽  
Substantial Improvement ◽  
Aromatic Rings ◽  
Log Reduction ◽  
Trihalomethane Formation Potential ◽  
Drinking Water Production

Pressurized powdered activated carbon/coagulation/ceramic microfiltration (PAC/Alum/MF) was investigated at pilot scale for treating low turbidity and low natural organic matter (NOM) surface waters spiked with organic microcontaminants. A total of 11 trials with clarified or non-clarified waters spiked with pesticides, pharmaceutical compounds, or microcystins were conducted to assess the removal of microcontaminants, NOM (as 254 nm absorbance, A254, and dissolved organic carbon, DOC), trihalomethane formation potential (THMFP), aerobic endospores as protozoan (oo)cysts indicators, bacteriophages as viruses indicators, and regular drinking water quality parameters. PAC/(Alum)/MF achieved 75% to complete removal of total microcontaminants with 4–18 mg/L of a mesoporous PAC and 2 h contact time, with a reliable particle separation (turbidity < 0.03 NTU) and low aluminium residuals. Microcontaminants showed different amenabilities to PAC adsorption, depending on their charge, hydrophobicity (Log Kow), polar surface area and aromatic rings count. Compounds less amenable to adsorption showed higher vulnerability to NOM competition (higher A254 waters), greatly benefiting from DOC-normalized PAC dose increase. PAC/Alum/MF also attained 29–47% NOM median removal, decreasing THMFP by 26%. PAC complemented NOM removal by coagulation (+15–19%), though with no substantial improvement towards THMFP and membrane fouling. Furthermore, PAC/Alum/MF was a full barrier against aerobic endospores, and PAC dosing was crucial for ≥1.1-log reduction in bacteriophages.

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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