Efficacy of selected pretreatment processes in the mitigation of low-pressure membrane fouling and its correlation to their removal of microbial DOM

Chemosphere ◽  
2021 ◽  
Vol 277 ◽  
pp. 130284
Author(s):  
Panitan Jutaporn ◽  
Rose M. Cory ◽  
Philip C. Singer ◽  
Orlando Coronell
Keyword(s):  
Membrane Fouling ◽  
Low Pressure ◽  
Pretreatment Processes

scholarly journals Coagulation/flocculation prior to low pressure membranes in drinking water treatment: a review

2020 ◽  
Vol 6 (11) ◽  
pp. 2993-3023
Author(s):  
Tyler A. Malkoske ◽  
Pierre R. Bérubé ◽  
Robert C. Andrews
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Membrane Fouling ◽  
Drinking Water Treatment ◽  
Low Pressure ◽  
Floc Properties ◽  
The Impact

Coagulation/flocculation has been grouped into three typical configurations and the impact of each examined in terms of floc properties and membrane fouling.

scholarly journals NOM (HA and FA) Reduction in Water Using Nano Titanium Dioxide Photocatalysts (P25 and P90) and Membranes

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 249
Author(s):  
Mariola Rajca
Keyword(s):  
Titanium Dioxide ◽  
Membrane Fouling ◽  
Active Surface ◽  
Fulvic Acids ◽  
Low Pressure ◽  
Organic Substances ◽  
Permeate Flux ◽  
Medium Pressure ◽  
Surface Areas ◽  
Nano Titanium Dioxide

This study examined the removal of natural organic substances (humic acids-HA, and fulvic acids-FA) from model solutions using photocatalysis and ultrafiltration. The effect of two nano titanium dioxide types (P25 and P90) with different active surface areas and two UV lamps (low-pressure and medium-pressure) on the effectiveness of FA and HA removal during photocatalysis was tested. An integrated photocatalytic + ultrafiltration system was also analyzed to determine the effectiveness of FA and HA removal and the changes in the relative permeate flux (Ultrafiltration Membrane Fouling-UF). We observed that photocatalysis using the P90 nano titanium dioxide was more efficient than the P25 due to the larger surface area (2×). The decomposition of organic substances proceeded efficiently up to 30 min of solution exposure, and the use of a medium-pressure lamp accelerated compound decomposition relative to the low-pressure lamp. The applied photocatalysis + ultrafiltration system was characterized by a high degree of FA removal while improved hydraulic efficiency was observed during ultrafiltration.

Modeling NOM fouling of low pressure membranes: impact of membrane properties and NOM characteristics

2008 ◽  
Vol 8 (1) ◽  
pp. 75-83
Author(s):  
NoHwa Lee ◽  
John Pellegrino ◽  
Gary Amy
Keyword(s):  
Membrane Fouling ◽  
Membrane Filtration ◽  
Principal Component ◽  
Low Pressure ◽  
Time Frame ◽  
Membrane Properties ◽  
Flux Decline ◽  
Cake Layer ◽  
Highly Correlated ◽  
Significant Flux

This research attempted to identify characteristic coordinates responsible for significant flux decline in low pressure membrane filtration, and to explain relationships among those coordinates with a modeling approach. A Pearson's correlation matrix supported that significant flux decline over a short time frame (low delivered DOC) is highly correlated with high molecular weight (MW) components of NOM. Simulations of flux decline by model equations were close to the experimental results revealing that low pressure membrane fouling is dominantly affected by NOM characteristics and membrane properties. One source water, exhibiting the highest flux decline, showed mostly cake formation as a fouling mechanism. The results indicate that significant flux decline is caused by high MW components leading to formation of a cake layer. Principal component analysis (PCA) revealed that high MW polysaccharides are the most important NOM component affecting significant membrane fouling.

Identification of effluent organic matter fractions responsible for low-pressure membrane fouling

2012 ◽  
Vol 46 (17) ◽  
pp. 5531-5540 ◽  
Author(s):  
Emmanuelle Filloux ◽  
Hervé Gallard ◽  
Jean-Philippe Croue
Keyword(s):  
Organic Matter ◽  
Membrane Fouling ◽  
Low Pressure ◽  
Effluent Organic Matter ◽  
Organic Matter Fractions

scholarly journals Characterization of secondary treated effluents for tertiary membrane filtration and water recycling

2012 ◽  
Vol 2 (2) ◽  
pp. 74-83 ◽  
Author(s):  
C. Ayache ◽  
M. Pidou ◽  
W. Gernjak ◽  
Y. Poussade ◽  
J.-P. Croué ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Low Pressure ◽  
Hollow Fibre ◽  
Feed Water ◽  
Chemical Cleaning ◽  
Characterization Methods ◽  
Secondary Effluents

This study evaluates the impacts of water quality from three different secondary effluents on low pressure membrane fouling. Effluent organic matter (EfOM) has been reported by previous studies as responsible for membrane fouling. However, the contribution of the different components of EfOM to membrane fouling is still not well understood. In order to improve and optimize treatment processes, characterization and quantification of the organic matter are important. The characterization methods used in this study are liquid chromatography coupled with an organic detector (LC-OCD) and excitation emission matrix fluorescence spectroscopy (EEM). A bench-scale hollow fibre membrane system was used to identify the type of fouling depending on the feed water quality. Results showed no measurable dissolved organic carbon removal by the membranes for the three secondary effluents. Biopolymers and humic-like substances found in different proportions in the three effluents were partially retained by the membranes and were identified to contribute significantly to the flux decline of the low pressure membranes. The observed fouling was determined to be reversible by hydraulic backwashing for two effluents and only by chemical cleaning for the third effluent.

Mechanisms of membrane fouling during ultra-low pressure ultrafiltration

2011 ◽  
Vol 377 (1-2) ◽  
pp. 42-53 ◽  
Author(s):  
Maryna Peter-Varbanets ◽  
Jonas Margot ◽  
Jacqueline Traber ◽  
Wouter Pronk
Keyword(s):  
Membrane Fouling ◽  
Low Pressure

scholarly journals A novel approach using a fouling index to evaluate NOM fouling behavior in a low pressure ultrafiltration process

2013 ◽  
Vol 14 (2) ◽  
pp. 196-204 ◽  
Author(s):  
Ping Xiao ◽  
Weijun Zhang ◽  
Feng Xiao ◽  
Zhe Bi ◽  
Dongsheng Wang
Keyword(s):  
Natural Organic Matter ◽  
Membrane Fouling ◽  
Low Pressure ◽  
Mass Balances ◽  
Novel Approach ◽  
Initial Interaction ◽  
Alkaline Cleaning ◽  
Short Time ◽  
Ultrafiltration Process ◽  
Fast Stage

A fouling index (FI) was introduced as a novel approach to investigate natural organic matter (NOM) fouling behavior in a low pressure membrane ultrafiltration process. Humic acid (HA), bovine serum albumin (BSA) and sodium alginate (SA), were used in the experiments. According to FI values, fouling was caused by NOM in two steps: a fast fouling process followed by a slow one. FI of the fast stage (FIF) was much greater than that of the slow one (FIS), showing the initial interaction would play a significant role in the fouling process over a short time. The results of mass balance suggested that a small fraction of DOC was responsible for membrane fouling caused by adsorption. Furthermore, both hydrophobic interaction and electrostatic interaction between NOM and the membrane determined the fouling behavior. Only a portion of foulants was removed after hydraulic washing. The sequence of NOM causing irreversible fouling was BSA > HA > SA, and the sequence of irreversible fouling after alkaline cleaning was SA > BSA > HA. The variations of FI values were consistent with the results of mass balances and flux recovery, which confirmed the FI was a simple and effective tool to describe the membrane fouling process.

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