ICWES15 - Reclamation of Oilfield Produced Water using Hydrophilic Pervaporative Membrane. Presented by May N Sule, Imperial College, London, United Kingdom
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The document summarizes a study evaluating a hydrophilic pervaporative membrane for reclaiming oilfield produced water. Produced water is a large waste stream from oil and gas extraction containing salts, hydrocarbons like benzene and arsenic. Current treatment methods have disadvantages. The study aims to experimentally and mathematically model using the membrane to remove contaminants for potential water reuse. Initial results show the membrane sorbs water and retains salts and organic compounds, indicating potential for treating produced water. Further experiments and modeling will assess membrane performance under various conditions for field implementation.
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https://www.sciencedirect.com/science/article/pii/S0011916417315229
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Thesis cover
This thesis investigates the removal of trace organic contaminants (TrOCs) using three integrated membrane processes for indirect potable water recycling applications. The document summarizes that a combination of membrane bioreactor (MBR) with nanofiltration (NF) or reverse osmosis (RO) membrane filtration can efficiently remove a wide range of TrOCs. It also shows that forward osmosis (FO) combined with an MBR in an osmotic membrane bioreactor (OMBR) demonstrates potential as a low energy process for producing high quality treated effluent, especially when using seawater as the draw solution. Testing found that an MBR removes hydrophobic and biodegradable TrOCs
Article 3.pdf
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Article 2.pdf
This document describes a study that evaluated a hybrid membrane bioreactor process for removing hydrogen sulfide (H2S) from biogas. The process used a polydimethylsiloxane membrane to first absorb H2S from biogas into an alkaline liquid, followed by biological oxidation of H2S in the liquid. The effects of absorption liquid pH, biogas flowrate, and dissolved oxygen concentration on H2S removal efficiency and selectivity were investigated. The results showed that pH 7 performed better than pH 8.5, and H2S removal exceeded 97% at flowrates below 148 g H2S/m3d and dissolved oxygen below 1 mg/L. This novel hybrid process provides an effective and low-cost
Investigation Of Hydrogen Production By Using Composite Membrane (Nafion/Zro2...
In the present study, Composite materials based on perfluorinated cation-exchange membrane incorporating particles of Zirconium and Nafion is synthesized .With this membrane the performance of the electrolysis cell improved considerably at room temperature and atmospheric pressure. In addition, by using catalysts and membranes, the performance of this Composite membrane is studied by varying voltage range with respect to hydrogen yield and at current density 0.1, 0.2, 0.3, 0.4, and 0.5(A cm-2), With a Nafion 115 membrane as a reference electrolyte. Experiments have shown that 99.9% purity of hydrogen Gas is evolved The physicochemical properties of the composite membranes such as thermogravimetric analyzer (TGA), Scanning Electron Microscope (SEM), XRD (X-ray powder diffraction), Fourier transform infrared spectroscopyand and Ion Exchange Capacity is determined. The fabricated composite membranes have shown the significant improvement of all tested properties compared to that of pure Nafion membrane.
Article 4.pdf
This document summarizes a study that evaluated using an autotrophic denitrification process to remove hydrogen sulfide (H2S) from biogas produced by anaerobic digestion of chicken manure. A laboratory upflow fixed bed reactor was fed scrubbed H2S from the biogas and nitrate. Over 95% H2S and 90% nitrate removal were achieved. When fed directly scrubbed H2S, the reactor experienced clogging from elemental sulfur particles. Feeding scrubbed H2S from biogas at pH 8-9 achieved 98% H2S and 97% nitrate removal without clogging. This process biologically converted H2S to elemental sulfur while denitrifying wastewater.
Article 5 bioelectrochemistry.pdf
This study investigated using a bio-electrochemical system (BES) for the simultaneous removal of nitrate and sulfide from different sources without mixing the sources. The anode chamber of the BES was fed with effluent from a sulfate reducing reactor as an electron donor source, while the cathode chamber was fed with nitrate-rich groundwater as an electron acceptor source. The BES was effective at simultaneously removing 10 gS/m3/d of sulfide and 7.26 gN/m3/d of nitrate without mixing the sources. Denitrification in the cathode chamber was supported by electrons from sulfide oxidation in the anode chamber passing through the membrane, and possibly from corrosion of
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2 application of moving bed biofilm reactor (mbbr) and integrated fixed activ...
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Influence of carrier_type_on_nitrification_in_the_
Estimation of the_specific_surface_area_for_a_poro
Estimation of the_specific_surface_area_for_a_poro
Investigation Of Hydrogen Production By Using Composite Membrane (Nafion/Zro2...
Investigation Of Hydrogen Production By Using Composite Membrane (Nafion/Zro2...
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Thesis seminar
https://www.nature.com/articles/s41598-018-19172-w
https://www.sciencedirect.com/science/article/pii/S0011916417315229
1 s2.0-s0894177718301973-main
Frictional pressure drop of aqueous-organic two-phase flow through packed and unpacked rectangular serpentine millichannel
Synthesis, Evaluation, Modeling and Simulation of Nano-Pore NAA Zeolite Membr...
ABSTRACT
Zeolite membranes have uniform and molecular-sized pores that separate molecules based on the differences in the molecules’ adsorption and diffusion properties. Strong electrostatic interaction between ionic sites and water molecules (due to its highly polar nature) makes the zeolite NaA membrane very hydrophilic. Zeolite NaA membranes are thus well suited for the separation of liquid-phase mixtures by
pervaporation. In this study, experiments were conducted with various Ethanol–water mixtures (1–20 wt. %) at 25 °C. Total flux for Ethanol–water mixtures was found to vary from 0.331 to 0.229 kg/m2 .h with increasing Ethanol concentration from 1 to 20 wt.%. Ionic sites of the NaA zeolite matrix play a very important role in water transport through the membrane. These sites act both as water sorption and transport sites. Surface diffusion of water occurs in an activated fashion through these sites. The precise Nano-porous structure of the zeolite cage helps in a partial molecular sieving of the large solvent
molecules leading to high separation factors. A comparison between experimental flux and calculated flux using Stephan Maxwell (S.M.) correlation was made and a linear trend was found to exist for water flux through the membrane with Ethanol concentration. A comprehensive model also was proposed for the Ethanol/water pervaporation (PV) by Finite Element Method (FEM). The 2D model was masterfully capable of predicting water concentration distribution within both the membrane and the feed side of the pervaporation membrane module.
KEYWORDS
Nano pores; Pervaporation; Ethanol separation; Zeolite NaA membrane; FEM simulation
SYNTHESIS, EVALUATION, MODELING AND SIMULATION OF NANO-PORE NAA ZEOLITE MEMBR...
Zeolite membranes have uniform and molecular-sized pores that separate molecules based on the
differences in the molecules’ adsorption and diffusion properties. Strong electrostatic interaction between
ionic sites and water molecules (due to its highly polar nature) makes the zeolite NaA membrane very
hydrophilic. Zeolite NaA membranes are thus well suited for the separation of liquid-phase mixtures by
pervaporation. In this study, experiments were conducted with various Ethanol–water mixtures (1–20 wt.
%) at 25 °C. Total flux for Ethanol–water mixtures was found to vary from 0.331 to 0.229 kg/m2
.h with
increasing Ethanol concentration from 1 to 20 wt.%. Ionic sites of the NaA zeolite matrix play a very
important role in water transport through the membrane. These sites act both as water sorption and
transport sites. Surface diffusion of water occurs in an activated fashion through these sites. The precise
Nano-porous structure of the zeolite cage helps in a partial molecular sieving of the large solvent
molecules leading to high separation factors. A comparison between experimental flux and calculated flux
using Stephan Maxwell (S.M.) correlation was made and a linear trend was found to exist for water flux
through the membrane with Ethanol concentration. A comprehensive model also was proposed for the
Ethanol/water pervaporation (PV) by Finite Element Method (FEM). The 2D model was masterfully
capable of predicting water concentration distribution within both the membrane and the feed side of the
pervaporation membrane module.
Lazko biobased waterborne pu - isgc - 2015 vfinal
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Ceramic membrane coating with graphene oxide for tannery wastewater treatment
The document summarizes a study on using a graphene oxide coated ceramic membrane for treating tannery wastewater. Key points:
- Tannery wastewater is highly contaminated and poses risks to the environment. A ceramic membrane was coated with graphene oxide using dip coating to treat this wastewater.
- Experiments were conducted at different pressures from 0.7 to 3 bar to evaluate the coated membrane's rejection of contaminants like total solids, salts, and conductivity.
- Results showed the coating improved the membrane's rejection performance. Rejection percentages increased for parameters like total solids, dissolved solids, suspended solids, salinity and conductivity compared to an uncoated membrane.
Linked in
Ultrafiltration is used in waste water treatment and process water purification to reduce pollution and costs. Membrane fouling reduces flux over time. Chemical cleaning can restore flux but may degrade membranes through chemical aging. This study examined the chemical resistance of four polymeric membranes to alkaline and acidic cleaning agents over time periods simulating one and two years of industrial use. Polyethersulfone and polysulfone membranes withstood all exposures with no degradation detected. Cellulose-based membranes showed minor changes at high alkaline pH, indicating hydrolysis of their chemical structure. Alkaline cleaning was compatible with cellulose membranes at pH below 11. All membranes were resistant to acids. The results showed the tested cleaning agents were suitable for polyeth
DNAPL Remediation with ClO2_UV-published paper
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Influence of Organic Solvents on the Preparation of Composite Membranes-Epoxy...
Influence of Organic Solvents on the Preparation of Composite Membranes-Epoxy...Marcello Pojucan Magaldi Santos
In this work, membrane based activated carbon have been studied, and because of the large surface area and, consequently, adsorption of pores, has a wide use for purification of liquids or gases in its entirety. The basic idea is the refinement of the technological expertise of obtaining organic resin composite membranes - activated carbon with porosity characteristics typical of type UF membranes. The membranes were prepared with 40% vol. epoxy resin and 60% vol. Commercial activated carbon micro and mesoporous MADECARBO®, crude, evaluating three types of solvents (toluene, ethyl acetate and ethanol). Physical characterizations such as density Archimedes demonstrated an apparent porosity of 47% - 70% for raw coal and 49% - 62% for dry coal. The microstructure of the specimens was evaluated by scanning electron microscopy, indicating good homogeneity of the resin-carbon interaction for both formulations with raw coal, and for dry coal. The flow tests were conducted in a test cell to tubular membranes that simulates parallel flow type filter. As for the flow, the formulation with the lowest result of this property was a coal dry amid ethyl acetate. As for the raw coal, the lowest flow was obtained from the coal of the same nature, but amid absolute ethyl alcohol. From the results, it was concluded that this type of media is strongly influenced by the process for obtaining the formulation and, consequently, the microstructure of the specimens, plays an important role for the type of filtration obtained.Use of natural occurring organic matter to clean up groundwater
This document describes the design, construction, and operation of a funnel and gate permeable reactive barrier used to remediate petroleum hydrocarbons in groundwater. A white spirit spill contaminated groundwater near a factory, which flowed into a nearby river. A funnel and gate system was constructed, with an impermeable barrier funnel directing groundwater through an air sparging unit and blended peat gate for treatment before entering the river. Monitoring over 10 months showed the system effectively reduced contaminant concentrations below regulatory limits and prevented further pollution of the river.
Easy-handling carbon nanotubes decorated poly(arylene ether nitrile).pdf
This document describes the development of a novel carbon nanotube decorated poly(arylene ether nitrile) nanofibrous composite absorbent for efficient removal of methylene blue and congo red dyes. The absorbent was fabricated through decoration of acidified multi-walled carbon nanotubes onto a polydopamine-modified poly(arylene ether nitrile) nanofibrous membrane, followed by co-deposition of tannic acid and carboxylated chitosan. Characterization showed the absorbent had an average pore diameter of 19.21 nm. Adsorption tests found it could achieve maximum capacities of 633 and 589 mg/g for methylene blue and congo red
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Polyethersulfone (PES) is a polymeric permeable material used in ultrafiltration (UF)
membranes due to its high thermomechanical and chemical stability. The hydrophobic nature of
PES membranes renders them prone to fouling and restricts the practical applications of PES in the
fabrication of water treatment membranes. The present study demonstrates a non-solvent-induced
phase separation (NIPS) approach to modifying PES membranes with different concentrations of
discrete TiO2 nanotubes (TNTs). Zeta potential and contact angle measurements showed enhanced
hydrophilicity and surface negative charge in TNTs/PES nanocomposite membranes compared to
unmodified PES membranes. To discern the antifouling and permeation properties of the TNTs/PES
membranes, steam assisted gravity drainage (SAGD) wastewater obtained from the Athabasca oil
sands of Alberta was used. The TiO2 modified polymer nanocomposite membranes resulted in a
higher organic matter rejection and water flux than the unmodified PES membrane. The addition of
discrete TNTs at 1 wt% afforded maximum water flux (82 L/m2 h at 40 psi), organic matter rejection
(53.9%), and antifouling properties (29% improvement in comparison to pristine PES membrane).
An enhancement in fouling resistance of TNTs/PES nanocomposite membranes was observed in
flux recovery ratio experiments.
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Polyethersulfone (PES) is a polymeric permeable material used in ultrafiltration (UF) membranes due to its high thermomechanical and chemical stability. The hydrophobic nature of PES membranes renders them prone to fouling and restricts the practical applications of PES in the fabrication of water treatment membranes. The present study demonstrates a non-solvent-induced phase separation (NIPS) approach to modifying PES membranes with different concentrations of discrete TiO 2 nanotubes (TNTs). Zeta potential and contact angle measurements showed enhanced hydrophilicity and surface negative charge in TNTs/PES nanocomposite membranes compared to unmodified PES membranes. To discern the antifouling and permeation properties of the TNTs/PES membranes, steam assisted gravity drainage (SAGD) wastewater obtained from the Athabasca oil sands of Alberta was used. The TiO 2 modified polymer nanocomposite membranes resulted in a higher organic matter rejection and water flux than the unmodified PES membrane. The addition of discrete TNTs at 1 wt% afforded maximum water flux (82 L/m 2 h at 40 psi), organic matter rejection (53.9%), and antifouling properties (29% improvement in comparison to pristine PES membrane). An enhancement in fouling resistance of TNTs/PES nanocomposite membranes was observed in flux recovery ratio experiments. View Full-Text
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
This document describes a study on incorporating discrete titanium dioxide (TiO2) nanotubes into polyethersulfone (PES) membranes using a non-solvent induced phase separation approach to modify the membranes. Different concentrations of TiO2 nanotubes were added to create nanocomposite membranes. Characterization showed the nanocomposite membranes had enhanced hydrophilicity and negative surface charge compared to unmodified PES membranes. Testing also found the TiO2 nanotube modified membranes had higher water flux, better organic matter rejection, and improved antifouling properties when filtering real wastewater compared to the unmodified PES membrane. Adding 1 wt% TiO2 nanotubes provided the best performance.
Electrospn 18 casasola-full
This document summarizes a study on the effect of different solvent systems on poly(lactic acid) (PLA) nanofibres produced through electrospinning. PLA solutions were prepared using various single solvents and mixed solvent systems. Of the single solvents tested, only acetone produced continuous nanofibres, while the others resulted in beads. The addition of acetone to other solvents in a 50/50 mixture improved fibre production. Solutions of acetone/dimethylformamide and acetone/dimethylacetamide produced smooth, bead-free nanofibres with the narrowest diameter distribution. The mixed solvent systems had lower viscosity and surface tension but higher conductivity than single solvents, enabling better fibre formation
ACE 15 Poster
This document summarizes a study that used fluorescence spectroscopy to detect microplastics in water and wastewater streams. The researchers found that polyethylene and polystyrene microplastics could be detected in wastewater based on their unique fluorescence peaks. Testing showed that polyethylene and polystyrene leached the most organic matter into ultrapure water, whereas polypropylene and PVC leached very little. The results indicate fluorescence spectroscopy is a potential method for tracking microplastics in various aquatic environments.
Sdm presentation
1) The document discusses pervaporation separation of water-dioxane mixtures through poly(vinyl alcohol)-silicone based hybrid membranes as a more efficient and eco-friendly alternative to conventional separation processes.
2) The key advantages of using these membranes for pervaporation separation are that they are environmentally clean, energy efficient, have low capital investment, and can successfully break azeotropic points.
3) Experimental results showed that the membranes exhibited higher flux and selectivity at higher temperatures, and the activation energy and heat of sorption values indicated that Langmuir sorption was the predominant mechanism.
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
Membranes have wide uses in industry and medicine applications. Polymer membranes are important materials
because of their high chemical resistance, but they are of weak mechanical resistance against high pressures. Therefore, it was
essential to modify a permeability measuring technique free from high pressure application. The current work represented a
modification for the permeability measuring technique of membranes, where ionic salt was added with known concentration
to water as common solvent and the electrolyte current was measured behind the membrane. The electrolysis current was
correlated to the flow rate of water across a polyvinyl alcohol (PVA) membrane. Some other problems were raised such that
polarization on electrodes and changes in electrolyte contents during the long time of the slow process. Pulsed potential on
electrodes resolved these problems and other associated problems like rush in current and the double layer capacitance effect.
An empirical equation was suggested to evaluate the permeability of polymer membranes by this modified method. Easy and
accurate measurement of permeability helped authors to change the permeability of PVA membranes by adding copper nano
particles in membrane to reduce its permeability, and adding silicone dioxide micro particles to the PVA membranes to
increase its permeability. Authors suggested a mechanism for these permeability changes. Scanning electron microscope
images for the filled PVA membranes supported the suggested mechanism
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
Membranes have wide uses in industry and medicine applications. Polymer membranes are important materials because of their high chemical resistance, but they are of weak mechanical resistance against high pressures. Therefore, it was essential to modify a permeability measuring technique free from high pressure application. The current work represented a modification for the permeability measuring technique of membranes, where ionic salt was added with known concentration to water as common solvent and the electrolyte current was measured behind the membrane. The electrolysis current was correlated to the flow rate of water across a polyvinyl alcohol (PVA) membrane. Some other problems were raised such that polarization on electrodes and changes in electrolyte contents during the long time of the slow process. Pulsed potential on electrodes resolved these problems and other associated problems like rush in current and the double layer capacitance effect. An empirical equation was suggested to evaluate the permeability of polymer membranes by this modified method. Easy and accurate measurement of permeability helped authors to change the permeability of PVA membranes by adding copper nano particles in membrane to reduce its permeability, and adding silicone dioxide micro particles to the PVA membranes to increase its permeability. Authors suggested a mechanism for these permeability changes. Scanning electron microscope images for the filled PVA membranes supported the suggested mechanism.
Similar to ICWES15 - Reclamation of Oilfield Produced Water using Hydrophilic Pervaporative Membrane. Presented by May N Sule, Imperial College, London, United Kingdom (20)
Performance of aromatic polyamide RO membranes synthesized by interfacial.pdf
Performance of aromatic polyamide RO membranes synthesized by interfacial.pdf
Innovation Technology for Water Desalination Based on RO-NF Membrane
Innovation Technology for Water Desalination Based on RO-NF Membrane
Synthesis, Evaluation, Modeling and Simulation of Nano-Pore NAA Zeolite Membr...
Synthesis, Evaluation, Modeling and Simulation of Nano-Pore NAA Zeolite Membr...
SYNTHESIS, EVALUATION, MODELING AND SIMULATION OF NANO-PORE NAA ZEOLITE MEMBR...
SYNTHESIS, EVALUATION, MODELING AND SIMULATION OF NANO-PORE NAA ZEOLITE MEMBR...
Ceramic membrane coating with graphene oxide for tannery wastewater treatment
Ceramic membrane coating with graphene oxide for tannery wastewater treatment
Influence of Organic Solvents on the Preparation of Composite Membranes-Epoxy...
Influence of Organic Solvents on the Preparation of Composite Membranes-Epoxy...
Use of natural occurring organic matter to clean up groundwater
Use of natural occurring organic matter to clean up groundwater
Easy-handling carbon nanotubes decorated poly(arylene ether nitrile).pdf
Easy-handling carbon nanotubes decorated poly(arylene ether nitrile).pdf
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
Robust Polymer Nanocomposite Membranes Incorporating Discrete TiO2 Nanotubes ...
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
New Technique for Measuring and Controlling the Permeability of Polymeric Mem...
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ICWES15 - Reclamation of Oilfield Produced Water using Hydrophilic Pervaporative Membrane. Presented by May N Sule, Imperial College, London, United Kingdom
- 1. Reclamation of Oilfield Produced Water using a Hydrophilic Pervaporative Membrane May Sule (PhD Candidate)*, Dr Michael R. Templeton (Supervisor) Department of Civil and Environmental Engineering, Imperial College London m.sule08@imperial.ac.uk
- 5. What is Pervaporation? Membrane Evaporation Permeate vapour Feed liquid Dissolution δ Diffusion
- 8. Physical properties of solvents at 25 o C Ref: Haxo and Lahey, 1988, Peng et al., 2003, Islam and Rowe, 2009 Material Molecular weight (g/mol) Solubility in water (mg/L) Molar volume (cm 3 /G.Mole) Water Benzene Toluene Ethylbenzene o-Xylene m-Xylene p-Xylene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethylene 18 78.11 92.13 106.17 106.17 106.17 106.17 133 133 132 1,780 515 152 175 196 190 1,320 1,318 1,100 18 89.11 106.847 123.064 121.193 123.456 123.919 99.2 92.4 90.4
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- 13. Initial Results Volume sorbed using NaCl Volume sorbed using humic acid solution
- 14. Initial Results Volume sorbed using MgCl 2 Volume sorbed using NaCl
- 17. Questions???