water filtration membrane Articles

  • 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

  • Air filtration applications for membranes

    Given their unique performance attributes membranes are finding use in a growing number of high efficiency air filtration applications. One example is in respirators and personal protective equipment. Applications where intense physical demands and risk of exposure to harmful contaminants are present demand the high efficiency / low pressure drop combination of expanded polytetrafluoroethylene ...

  • 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 ...


  • Crossflow Membrane Filtration High-Purity Water Systems

    INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

  • Fabrication of catalytic ceramic membranes for water filtration

    The paper describes the use of the layer-by-layer technique to coat ceramic membranes with iron and manganese oxide nanoparticles. The coatings are thin ...


    By IWA Publishing

  • MEDIA FILTRATION, MEMBRANES, OZONE, AND UV

    ABSTRACT For reclaimed water disinfection, pathogen reduction to acceptable public health risk levels is theprimary objective. A second emerging objective is the ability to destroy trace pollutants(endocrine disrupters (EDCs), pharmaceutically active compounds (PhACs)) at a reasonably lowcost.The WateReuse Foundation’s Innovative Reclaimed Water Treatment Project ...

  • What Is Zero Liquid Discharge and How Does It Work?

    Not every industrial facility that produces wastewater will require zero liquid discharge (ZLD). It is usually looked to as a last resort because it can be a complex process that requires a high initial investment. If a facility is located on a site that has severe water scarcity issues and/or astronomical discharge fees, it might be ...


    By SAMCO Technologies, Inc.

  • Advanced treatment of WWTP effluent with filtration leading to a pretreatment technique for membrane filtration

    In 2000 the European Union introduced the Water Framework Directive (WFD). The aim of the WFD is having an ecological and chemical balance for all surface waters in Europe in 2015. The European Commission identified 33 priority substances and their maximum allowable concentrations, FHI-values (Fraunhofer Institute), which are specified in the Annex of the WFD. The objective of this research is to ...


    By IWA Publishing

  • Advanced treatment of WWTP effluent with filtration leading to a pretreatment technique for membrane filtration

    In 2000 the European Union introduced the Water Framework Directive (WFD). The aim of the WFD is having an ecological and chemical balance for all surface waters in Europe in 2015. The European Commission identified 33 priority substances and their maximum allowable concentrations, FHI-values (Fraunhofer Institute), which are specified in the Annex of the WFD. The objective of this research is to ...


    By IWA Publishing

  • Intrinsic properties and performances of NF270 and XLE membranes for water filtration

    Nanofiltration and low pressure reverse osmosis membranes are well-known in the field of drinking water production and their separation performance is very strongly related to their intrinsic characteristics. The membrane characterization (scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential …) was realized on a NF270 and extra-low energy (XLE) membrane. SEM results ...


    By IWA Publishing

  • Effects of recycling flocculation membrane filtration on drinking water treatment

    Recycling flocculation membrane filtration (RF-MF) and coagulation membrane filtration (C-MF) were investigated for removal of natural organic matter (NOM) from Luan river in this study. The effectiveness of recycling flocculation pretreatment on both NOM removal and membrane filtration were assessed under different concentrations of coagulant and reflux flocs. Under the conditions of coagulant ...


    By IWA Publishing

  • Prediction of permeate flux decline in crossflow membrane filtration

    Microfiltration (MF) and ultrafiltration (UF) are pressure-driven membrane processes which are widely used in order to remove colloidal particles and microorganisms in water and waste water treatment systems. The filtration performance is, however, often hampered by the buildup of retained particulate matters on the membrane surfaces, which causes the deleterious permeate flux decline. ...


    By Toray Chemical Korea

  • Self-Cleaning Filtration for Pretreatment of Membrane, UV and Ozone Water Treatment Systems

    Recent field data has shown the effectiveness of automatic self-cleaning filters in removing suspended solids down to less than 3 microns in size without flocculents, pre-coats or granulated media. Pre-treatment of ozone systems is often needed to remove organic solids that would utilize high amounts of ozone during oxidation leaving little for complete disinfection. Selfcleaning screen filters ...

  • 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

  • Self-Cleaning Pre-Filtration for RO Membrane Systems

    ABSTRACT A few years ago physical processes could only remove suspended solids from a water stream. Recent advances in technology now allow the removal of selected molecules and ions from a water stream by physical means using membranes. The membrane process has recently become very efficient and economically feasible for many industrial, commercial, municipal and even residential customers. ...

  • Crossflow Membrane Filtration Applications in the Beverage Industry

    Abstract The use of crossflow membrane separation technology in the beverage industry has gone from a 'unique processing' approach to a standard unit process for many manufacturers. Applications such as replacement of troublesome diatomaceous earth (DE) filters for juice clarification have been highly successful. Employing reverse osmosis (RO) for apple juice concentration produces potential ...


  • Membrane filtration and sonication for industrial wastewater reuse

    This paper presents an experimental study aimed at estimating the efficiency of the innovative process of ultrafiltration (UF) combined with sonication (Son.) for the refinement of treated effluent to be reused in wet textile processes. Such a novel approach, which has not yet been employed on a full industrial scale, has been experienced at pilot scale on the secondary effluent of the ...


    By IWA Publishing

  • Membrane cleaning skids prolong operating life of costly membrane filtration units

    Considered one of the most important and costly components of a reverse osmosis purification system, membrane filtration elements (a thin semi-permeable layer which desalinates seawater) collect mineral buildup, organic materials and bacterial agents. The Lifestream Membrane Cleaning Skid cleans, flushes out and preserves the membrane, reviving efficiency and prolonging membrane life.Designing a ...

  • Application of chlorine resistant polyamide RO membrane for household water filtration device

    Chlorine attacks the polyamide RO membrane to cause membrane failure as measured by enhanced passage of both salt and water. For this reason, activated carbon pre-filters that remove chlorine are typically placed ahead of RO membranes in home drinking water treatment RO system. A general home drinking water treatment system employing RO is composed of preliminary sediment filter, activated carbon ...


    By Toray Chemical Korea

  • Structure changes and water filtration properties of electrospun polyamide nanofibre membranes

    Nanofibre membranes are studied extensively in water treatment. Inappropriate storage, however, could alter their performance, e.g. regarding water filtration. This shows the need for investigating this effect in more detail so as to offer a solution for long-term behaviour and stability. In this study, polyamide nanofibre membranes were treated under different conditions, simulating the ...


    By IWA Publishing

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you