Particle adsorption on a polyether sulfone membrane: how electrostatic interactions dominate membrane fouling

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65383-65391 ◽  
Author(s):  
D. Breite ◽  
M. Went ◽  
I. Thomas ◽  
A. Prager ◽  
A. Schulze
Keyword(s):  
Membrane Fouling ◽  
Electrostatic Interactions ◽  
New Method ◽  
Polyether Sulfone ◽  
Microfiltration Membranes ◽  
Particle Adsorption

This study presents a new method focussing on electrostatic interactions during fouling of microfiltration membranes.

Influence of a new method of applying adsorbents on membrane fouling in MBR systems

2019 ◽  
Vol 34 (S1) ◽  
pp. 355-366 ◽  
Author(s):  
Siavash Mohamadi ◽  
Hossein Hazrati ◽  
Jalal Shayegan
Keyword(s):  
Membrane Fouling ◽  
New Method

The importance of measuring the sludge filterability at an MBR – introduction of a new method

2012 ◽  
Vol 66 (1) ◽  
pp. 9-14 ◽  
Author(s):  
C. Thiemig
Keyword(s):  
Membrane Fouling ◽  
Reliable Method ◽  
Membrane Bioreactors ◽  
New Method ◽  
Strong Impact ◽  
Laboratory Equipment ◽  
Filtration Performance ◽  
Sludge Properties ◽  
Operational Aspects ◽  
General Method

Sludge properties have a strong impact on the operational aspects of membrane bioreactors (MBRs). Poor sludge properties cause stronger membrane fouling and reduce the filtration performance of MBRs. Up to now there is no general method used to measure the fouling or filtration relevant sludge properties in MBRs. The aim of this work was to develop a simple but reliable method to supply operators a tool to monitor the important sludge properties for their application and to compare this method with existing techniques. Through extensive research a new method called the sludge filtration index (SFI) has been developed to indicate the appropriate sludge parameters for MBR systems in a cheap and easy manner. The SFI can be measured with simple laboratory equipment and offers operators a powerful tool to monitor the conditions of their sludge, independent of the membrane conditions.

scholarly journals Influence of Membrane Vibration on Particles Rejection Using a Slotted Pore Membrane Microfiltration

Membranes ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 709
Author(s):  
Asmat Ullah ◽  
Kamran Alam ◽  
Saad Ullah Khan ◽  
Victor M. Starov
Keyword(s):  
Membrane Fouling ◽  
Produced Water ◽  
Separation Efficiency ◽  
Membrane Surface ◽  
Water Separation ◽  
Oil Droplet ◽  
Pore Blockage ◽  
Oil Water Separation ◽  
Microfiltration Membranes ◽  
Membrane Vibration

A new method is proposed to increase the rejection in microfiltration by applying membrane oscillation, using a new type of microfiltration membrane with slotted pores. The oscillations applied to the membrane surface result in reduced membrane fouling and increased separation efficiency. An exact mathematical solution of the flow in the surrounding solution outside the oscillating membrane is developed. The oscillation results in the appearance of a lift velocity, which moves oil particles away from the membrane. The latter results in both reduced membrane fouling and increased oil droplet rejection. This developed model was supported by the experimental results for oil water separation in the produced water treatment. It was proven that the oil droplet concentration was reduced notably in the permeate, due to the membrane oscillation, and that the applied shear rate caused by the membrane oscillation also reduced pore blockage. A four-times lower oil concentration was recorded in the permeate when the membrane vibration frequency was 25 Hz, compared to without membrane vibration. Newly generated microfiltration membranes with slotted pores were used in the experiments.

scholarly journals Fabrication of Tween-20 coated PVDF membranes for wastewater treatment: optimization of preparation parameters, removal and membrane fouling control performance

RSC Advances ◽  
2019 ◽  
Vol 9 (35) ◽  
pp. 20035-20043 ◽  
Author(s):  
Daoji Wu ◽  
Weiwei Zhou ◽  
Xiaoxiang Cheng ◽  
Congwei Luo ◽  
Peijie Li ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Vinylidene Fluoride ◽  
Tween 20 ◽  
Treatment Optimization ◽  
Sorbitan Monolaurate ◽  
Coating Agent ◽  
Hydrophilic Modification ◽  
Fouling Control ◽  
Poly Vinylidene Fluoride ◽  
Microfiltration Membranes

In the present study, polyoxyethylene (20) sorbitan monolaurate (Tween-20) was employed as a surface coating agent for hydrophilic modification of poly(vinylidene fluoride) microfiltration membranes.

A new method of measuring and presenting the membrane fouling potential

Desalination ◽  
2002 ◽  
Vol 150 (1) ◽  
pp. 31-43 ◽  
Author(s):  
Etienne Brauns ◽  
Erwin Van Hoof ◽  
Bart Molenberghs ◽  
Chris Dotremont ◽  
Wim Doyen ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
New Method

scholarly journals Microbial Adhesion and Biofilm Formation on Microfiltration Membranes: A Detailed Characterization Using Model Organisms with Increasing Complexity

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
L. Vanysacker ◽  
C. Denis ◽  
P. Declerck ◽  
A. Piasecka ◽  
I. F. J. Vankelecom
Keyword(s):  
Membrane Fouling ◽  
Biofilm Formation ◽  
Bacterial Community Composition ◽  
Microbial Interactions ◽  
Model Systems ◽  
Model Organisms ◽  
Microbial Adhesion ◽  
Membrane Biofouling ◽  
Microfiltration Membranes ◽  
Cell Densities

Since many years, membrane biofouling has been described as the Achilles heel of membrane fouling. In the present study, an ecological assay was performed using model systems with increasing complexity: a monospecies assay usingPseudomonas aeruginosaorEscherichia coliseparately, a duospecies assay using both microorganisms, and a multispecies assay using activated sludge with or without spikedP. aeruginosa. The microbial adhesion and biofilm formation were evaluated in terms of bacterial cell densities, species richness, and bacterial community composition on polyvinyldifluoride, polyethylene, and polysulfone membranes. The data show that biofouling formation was strongly influenced by the kind of microorganism, the interactions between the organisms, and the changes in environmental conditions whereas the membrane effect was less important. The findings obtained in this study suggest that more knowledge in species composition and microbial interactions is needed in order to understand the complex biofouling process. This is the first report describing the microbial interactions with a membrane during the biofouling development.

Effect of multicomponent fouling during microfiltration of natural surface waters containing nC60 fullerene nanoparticles

2017 ◽  
Vol 3 (4) ◽  
pp. 744-756 ◽  
Author(s):  
R. Floris ◽  
G. Moser ◽  
K. Nijmeijer ◽  
E. R. Cornelissen
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Surface Waters ◽  
Membrane Fouling ◽  
Industrial Water ◽  
Water Composition ◽  
Water Treatment Plants ◽  
Fullerene Nanoparticles ◽  
Microfiltration Membranes

To understand and mitigate the role of surface water composition and associated membrane fouling in the removal of nC60 nanoparticles by low-pressure membranes, experiments were carried out with microfiltration membranes using natural feed waters, mimicking separation in real industrial water treatment plants.

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