NAMS 2002 Workshop - ICOM 2008

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Membrane Fouling - General Topics – 6 Monday July 14, 12:15 PM-12:45 PM, O’ahu Visual Characterization of Fouling Behaviour By Activated Sludge Model Solutions Y. Marselina, University of New South Wales, Sydney, Australia P. Le-Clech, (Speaker) University of New South Wales, Sydney, Australia R. Stuetz, University of New South Wales, Sydney, Australia V. Chen, University of New South Wales, Sydney, Australia, v.chen@unsw.edu.au Fouling can be easily characterized with the hydraulic performances of the membrane, such as transmembrane pressure (TMP), flux and resistances. Better insight of fouling can also be obtained by using visualization methods, which include invasive and non-invasive techniques. The non-invasive techniques provide some advantages over the invasive techniques, by analyzing the membrane without removing it from its membrane module. Direct observation (DO), which consists of modified crossflow module, microscope and video camera, is one of the non-invasive techniques that can be used to visualize the fouling deposition and removal on the hollow fibre membrane. In this paper, the DO technique will be used to further characterize the fouling behaviour for extracellular polymeric substances (EPS) in activated sludge for membrane bioreactor (MBR) application. Recent research based on the effect of the feed on MBR fouling has been conducted by using model solutions to mimic the major foulants found in the mixed liquor. The bentonite particulate can be used to approximate the behaviour of biomass particles and flocs. The alginate and xanthan gum can be used to model the carbohydrate fraction and bovine serum albumin (BSA) used to model the protein fraction of the EPS material in the biomass. The glycerol was used to change the viscosity property of the fluid and model the Newtonian fluid. Moreover, the xanthan gum was used to model the non-Newtonian fluid. During the filtration of the bentonite - alginate mixture, the fouling deposition mechanisms were showed by the formation of the stagnant and fluidised layer on the membrane surface. When the concentration of alginate in the bentonite - alginate mixture was increased, the TMP and specific cake resistance increased but the stagnant fouling thickness (Hc) decreased, indicating dense fouling layer. Although the Hc decreased with the alginate concentration in the mixture, the cleaning time required to remove most of the reversible fouling increased. This showed that the addition of alginate contributed to the changes in the fouling layer morphology by increasing the cohesion bonding between deposited foulants and the adhesion bonding between foulants and membrane. It was observed that the fouling removal mechanisms in the presence of alginate were
observed in two subsequence phenomena: (1) cake expansion and gradual erosion, followed by (2) gradual erosion and removal in agglomerates. The effects of different biopolymer natures and feed viscosities on particulate fouling were also studied by observing the fouling deposition and removal of the mixtures in the presence of bentonite, alginate, BSA, glycerol and xanthan gum. The cake properties were better characterized with the TMP, resistances, visualization during fouling deposition and removal. The observation during fouling removal showed how the cohesivity of the fouling structures formed during the filtration. The presentation of this work will include videos of the fouling deposition and removal obtained during our experiments.
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ICOM 2008 Oral Presentation Proceed
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Professor Yoram Cohen Professor Joh
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ICOM 2008 Staff: The University of
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ICOM 2008 Workshop Schedule: Saturd
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Monday, July 14 - Afternoon Session
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Tuesday, July 15 - Afternoon Sessio
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8:15AM 8:35AM EMS Barrer Prize (Mau
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Friday, July 18 - Morning Sessions
Page 17 and 18: Oral Presentation Abstracts Morning
Page 19 and 20: Gas Separation I - 1 - Keynote Mond
Page 21 and 22: esulting permeability selectivity o
Page 23 and 24: chain packing. To ensure a well pha
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Page 27 and 28: satisfactory way the corresponding
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Page 35 and 36: an adjusted water management in the
Page 37 and 38: prospect for new energy sources as
Page 39 and 40: oxygen removal to the desired pH. C
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Page 43 and 44: [1] R. Lima de Miranda, J. Kruse, K
Page 45 and 46: Polymeric Membranes I - 4 Monday Ju
Page 47 and 48: Polymeric Membranes I - 5 Monday Ju
Page 49 and 50: Biomedical and Biotechnology I - 1
Page 53 and 54: Acknowledgments The Authors acknowl
Page 55 and 56: isolation of CD34+ cells was achiev
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Page 71 and 72: Membrane Modeling I - Fundamental A
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Page 81 and 82: Arora, M.B., J.A. Hestekin, S.W. Sn
Page 83 and 84: Conclusions Reverse electrodialysis
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Page 89 and 90: Nanofiltration and Reverse Osmosis
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Page 99 and 100: [4] L. M. Robeson, Journal of Membr
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Page 105 and 106: Nanostructured Membranes I - 5 Mond
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Page 115 and 116: investigated at first. As a result,
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Desalination I - 3 Monday July 14,
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Composite Polymeric Membrane Format
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NAMS Alan S. Michaels Award - 1a Tu
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NAMS Alan S. Michaels Award - 2 Tue
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opportunities for improving membran
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NAMS Alan S. Michaels Award - 4b Tu
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Nanofiltration and Reverse Osmosis
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[4] K. Vanherck et al. Accepted for
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accumulation had a strong effect on
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and, if so, to develop correlations
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non-porous and porous membranes are
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[2] Palmeri, J., Sandeaux, R. Sande
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fouling. Information obtained from
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This work performed under the auspi
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etween Ru(bi-pyridine)3 2+ and meth
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[1] M. Barboiu, C. Luca, C. Guizard
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Nanostructured Membranes II - 5 Tue
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Nanostructured Membranes II - 6 Tue
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than 10 nm. XRD data suggest that t
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Pervaporation and Vapor Permeation
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ethanol/butanol (non solvent) combi
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forward osmosis, the RO process is
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Osmotically Driven Membrane Process
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References: [1] Stupp, S. I.; Lebon
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temperatures might bring about the
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References [1] S. Benita, Microenca
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solvent, were investigated (where a
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ease of manipulation as this allows
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Horizontal shrinkage does not have
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Absorption of water was determined
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Gas Separation II - 1 - Keynote Tue
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Gas Separation II - 2 Tuesday July
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concentration. These results are co
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Gas Separation II - 5 Tuesday July
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will be shown that homogeneous film
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which can adsorb on the surface of
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Drinking and Wastewater Application
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were collected, the viable bacteria
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pressure, and permporosimetry with
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Inorganic Membranes I - 3 Tuesday J
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Membrane Fouling - UF & Water Treat
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Membrane Modeling II - Gas Separati
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[10] Wang BG, Lv HL, Yang JC. Chem
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Membrane and Surface Modification I
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Oral Presentation Abstracts Morning
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Gas Separation III - 1 - Keynote We
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Gas Separation III - 2 Wednesday Ju
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separation was next blended with di
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Polymeric Membranes II - 1 - Keynot
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Polymeric Membranes II - 3 Wednesda
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5. Erdodi, G.; Kennedy, J. P.; Prog
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observed for different locations in
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Biomedical and Biotechnology II - 3
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applied in the first two fields wil
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distribution of SBMA units within t
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5500 ppm (15 mM) was lowered to 30
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increasing the effective size of th
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etween 0 and 1), the automatic feed
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Membrane Modeling III - Process Sim
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Membrane Modeling III - Process Sim
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models developed suggests that ther
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start level has a huge impact on th
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Ultra- and Microfiltration I - Tran
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all three binary protein UF systems
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Synthetic solutions of ±-lactalbum
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Oral Presentation Abstracts Morning
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Gas Separation IV - 2 Thursday July
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6. T. C. Merkel, Z. He, I. Pinnau,
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EMS Barrer Prize - 1b Thursday July
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EMS Barrer Prize - 3 Thursday July
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EMS Barrer Prize - 4b Thursday July
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EMS Barrer Prize - 5 Thursday July
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therapy options have been modelled
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Ultra- and Microfiltration II - Pro
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in the vicinity of the rising bubbl
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of feed water ionic strength) on re
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technology that has gained growing
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Optimize polymeric membranes for sa
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Inorganic Membranes II - 2 Thursday
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confirms that the carbon dioxide pe
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permeability, stability issues comp
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Fuel Cells II - 2 Thursday July 17,
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5. Conclusion In this work, the evo
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Oral Presentation Abstracts Afterno
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an essentially pure H2 product is c
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In the presentation, we will presen
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was observed, indicative of the sim
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References Arora, M.B., J.A. Hestek
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performance of fibers is analyzed a
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Membrane Fouling III - RO & Biofoul
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[4] H. Noureddini, Book of Abstract
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component (PX, OX) separation via p
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Generally these results were in goo
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introduction of methyl groups into
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separation quality (10 µS/cm) and
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Desalination II - 3 Thursday July 1
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drop are linearly related (although
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antiscalant oxidation has been limi
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oth 15±5 kDa, which suggests that
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Atomic Force Microscopy (AFM), and
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y single gas permeation experiments
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PDMS toplayers were only partially
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noting that cross-linking agents co
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such extended parameter space in th
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Hybrid Membranes - 6 Thursday July
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Plenary Lecture III Friday July 18.
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Gas Separation V - 1 - Keynote Frid
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References: [1] H. Lin, E. Van Wagn
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elative contributions of Fickian di
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Gas Separation V - 4 Friday July 18
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Gas Separation V - 6 Friday July 18
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Electron Microscopy (TEM) analyses
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- Hybrid RO train: A hybrid RO trai
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concentration as well as on the sod
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scaling deposits in the DCMD device
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Silica colloidal solution with diff
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Membrane Fouling IV - RO & Desalina
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Polyacrylonitrile (PAN) UF membrane
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the polymer dope was PEI (12 wt%),
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Inorganic Membranes III - 1 - Keyno
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Inorganic Membranes III - 2 Friday
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CO2/H2 selectivity at high temperat
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ammonia complexes in aqueous soluti
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possible to have a membrane capable
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fired boiler flue gas, SOx and merc
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EPR/Ago/p-benzoquinone composite sh
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elated to the presence of free elec
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surroundings. When the temperature
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that no absorbent was detected in t
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days of filtration from 120 to 7-10
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was performed to restore membrane f
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with the SRT of 65 days, no correla
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Results Critical flux measurements
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MLSS is not directly proportional t
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Fuel Cells III - 2 Friday July 18,
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Fuel Cells III - 4 Friday July 18,
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Ultra- and Microfiltration III - Me
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can be deduced from the imaginary p
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membranes. The analysis of the ligh
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Membrane Contactors - 2 Friday July
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absorption liquid in the pores of t
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Packaging and Barrier Materials - 1
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Historically, all the approaches de
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