membrane separation Articles

  • Energetics for gas separation in microporous membranes

    Gas separation by inorganic membranes has proven to be effective at laboratory scales, but is now facing challenges in developing for industrial scales. A particular type of inorganic membrane is the class of porous molecular sieves formed by sol-gel method deposited on ceramic substrates. These molecular sieve silica (MSS) membranes are ideally suited to high temperature He, H2, CO2 and CH4 ...


    By Inderscience Publishers

  • Functionalised mesoporous silica membrane for the separation of carbon dioxide

    Defect-free mesoporous silica membranes (MCM-41 and MCM-48) were obtained by spin-coating and the solution growth method; 3-aminopropylsilyl groups were attached to the surface of these silica membranes. The pore size control in these novel silica membranes was achieved by direct synthesis employing cationic surfactants and post-synthesis silylation procedure using silane coupling agents. The SEM ...


    By Inderscience Publishers

  • Separating micro pollutants by an innovative membrane process.

    Combined adsorption of micro pollutants on activated carbon and membrane filtration of MICRODYN-NADIR has proven an alternative to the established activated carbon/precipitation/sand filtration process. Contamination of the environment by micro pollutants has clearly been proved by now. Due to the high concentration of microorganisms and the contamination by antibiotics coming from animal ...


    By Microdyn-Nadir GmbH

  • Low Pressure Separation Membrane: Purification Of Landfill Gas

    Summary: The paper is presenting preliminary results of the on-site trial of the gas purification pilot plant based on membrane separation technology, operating at relatively low pressure- This trial is an initial phase of a bigger project aiming at production of clean and high calorific value gas that could be used as a substitute of fossil fuel. e.g. for powering vehicles. The objectives of the ...


    By Biogas Technology Limited

  • Oxygen-separation membranes could aid in CO2 reduction

    Ceramic membranes may reduce carbon dioxide emissions from gas and coal-fired powerplants. Written by Jennifer Chu, MIT News Office.You can read the original new in MIT NewsIt may seem counterintuitive, but one way to reduce carbon dioxide emissions to the atmosphere may be ...

  • Novel Separations by a Charged NF/UF Membrane

    Introduction Separation characteristics of a novel, thin-layer composite (TLC®) membrane bearing an anionic surface charge are elucidated using three distinct approaches. These include solute challenges to demonstrate apparent molecular weight cut-off (MWCO), affinity chromatography to demonstrate surface force interactions between solute and membrane, and pilot scale operations using industrial ...


  • Membrane filtration

    Membrane is a thin layer of material that is capable of separating compounds as a function of physical and chemical properties when a driving force is applied across the membrane, which has been widely used in a wide range of applications in water industry [1]. Membrane can be classified by the range of compounds separated and the driving forces employed. For example, microfiltration (MF), ...


    By IWA Publishing

  • Dissolved air flotation separation for pretreatment of membrane bioreactor in domestic wastewater treatment

    Due to requiring higher water quality standards over time, new technologies are being employed for wastewater treatment. Dissolved air flotation (DAF) and membrane bioreactor (MBR) technologies are widely employed as new technologies in wastewater treatment. DAF is used due to its excellent separation capability of suspended solids as well as oily material. MBR is used because it may provide a ...


    By IWA Publishing

  • Separation of zinc oxide nanoparticles in water stream by membrane filtration

    Zinc oxide (ZnO) nanoparticles are used for the synthesis of various materials. The nanoparticles, when entering into the environment, affect aquatic life. Their antibacterial properties deter the biological treatment process of wastewater treatment plants. The study focuses on the effectiveness of ultrafiltration (UF) membranes for the removal of ZnO nanoparticles. In this study, a commercial ...


    By IWA Publishing

  • Treatment of dyeing effluent from tannery using membrane separation processes

    Treatment of a dyeing bath of a tannery was carried out using a hybrid membrane-based separation scheme consisting of Nanofiltration (NF) followed by Reverse Osmosis (RO). Experiments were conducted using a cross-flow cell in continuous mode. The performance criteria of the separation scheme were evaluated in terms of dye concentration, Chemical Oxygen Demand (COD), Biological Oxygen Demand ...


    By Inderscience Publishers

  • Membranes and theoretical modelling of liquid–gas membrane separation for aromatic compounds removal from water: a review

    Liquid–gas membrane separation techniques - namely, vacuum membrane distillation, membrane air–stripping/sweeping and pervaporation - are non–equilibrium membrane separation processes emerging for the removal of aromatic compounds from industrial wastewater and polluted ground waters. This review focuses on polymeric hydrophobic membranes which are commonly employed in the liquid–gas membrane ...


    By Inderscience Publishers

  • Proteins causing membrane fouling in membrane bioreactors

    In this study, the details of proteins causing membrane fouling in membrane bioreactors (MBRs) treating real municipal wastewater were investigated. Two separate pilot-scale MBRs were continuously operated under significantly different operating conditions; one MBR was a submerged type whereas the other was a side-stream type. The submerged and side-stream MBRs were operated for 20 and 10 ...


    By IWA Publishing

  • Nanostructured phospholipid membranes

    This review describes a simple high-throughput method for producing laterally nanostructured monolayer and bilayer films on planar surfaces based on the Langmuir-Blodgett transfer of a phase-separated phospholipid mixture from the air/water interface to a solid support. Applications of the patterned lipid films to spatially direct the adsorption of proteins and to demonstrate stereoselective ...


    By Inderscience Publishers

  • Picking Their Membranes - Part I -

    Membrane use by water suppliers may not be new, but suppliers are considering membranes in new ways -- by number and variety of applications. Membranes can work on a wider range of resource waters, more efficiently and for less cost than before. Among membranes' attractions as substitutes for conventional water-treatment technologies, such as filtration, distillation and ion-exchange are: ...


  • Membrane Free Volume Characterization

    Free Volume in Reverse Osmosis Membrane Reverse Osmosis (RO) is the leading technique for water desalination. RO membranes have been optimized over the past three decades. Typically, commerical RO membranes can produce drinking water from seawater. Water and salt transport through RO membrane follows the so-called Solution-Diffusion Model. Particularly, during separation, ...


    By IWA Publishing

  • Membrane Bioreactor for Sanitary Landfill

    The Problem The county of Warren NJ owns and operates a sanitary landfill in Oxford Twp, NJ. The facility generates an average of 50,000 gallons per day of leachate, with peaks to 100,000 gallons per day. The facility was discharging to a local POTW from their lagoon, but they were facing requirements for nitrogen removal from the POTW and needed a new system to provide ...


    By Dynatec Systems Inc.

  • A history of chemically resistant membranes

    The use of polymeric membranes for filtration of non-aqueous solutions started around 1960 and has been developed significantly since then [1]. Today, non-aqueous membrane filtration applications in chemical and pharmaceutical processing account for more than 25% of the global total polymeric membrane market [2]. ...


    By Sterlitech Corporation

  • Membrane Bioreactors for RO Pretreatment

    ABSTRACTCurrently, treated municipal wastewater is typically discharged to the environment in most parts of the world. It is, however, a potential water resource from which high quality water for reuse can be produced. Reuse applications include both non-potable applications such as irrigation and production of industrial process water, and indirect potable reuse including aquifer recharge. For ...

  • Meet Roman A. Membrane

    I was born in 1964 in San Diego, CA to a researcher at UCLA who worked on a project called reverse osmosis and an engineer who worked with nuclear reactors. In the early 1970’s I found my true calling in a process called separation. Some thought that I invented it so they called it Membrane Separation. I studied electronics and was named the top process in my class electronics is where I ...


    By Avista Technologies

  • Membranes, the Finest Filtration

    Introduction The notion that salt could be removed from seawater without a phase change took hold of Dr. Sourirajan's imagination in the late 1950's. The actual invention of the reverse osmosis (RO) membrane took place in his laboratory at UCLA around 1960. (Thus Sourirajan could be called not only the 'Father of Reverse Osmosis,' but the initiator of all crossflow membrane technology.) The full ...


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