membrane filtration technology Articles

  • Reverse Osmosis and Nanofiltration Membrane Filtration Systems: Common Problems and How to Fix Them

    Reverse osmosis (RO) and nanofiltration (NF) are membrane filtration technologies that are designed to remove solute ions and molecules from a pretreated liquid stream. Well-designed RO/NF units are compact and demand relatively little maintenance, making them an attractive alternative to conventional treatment trains. Even despite the merits of today’s efficient RO/NF technologies, it pays ...


    By SAMCO Technologies, Inc.

  • How Do You Choose the Best Reverse Osmosis and Nanofiltration Membrane System for an Industrial Facility?

    As global demands for clean water increase, more and more industrial facilities are looking toward membrane filtration solutions, such as reverse osmosis (RO) and nanofiltration (NF), to help manage intake, process, and waste water treatment. Using membrane filtration can help your facility reuse wastewater and virtually eliminate discharge fees, and depending on the industry or required use, it ...


    By SAMCO Technologies, Inc.

  • 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 ...


  • 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 ...

  • Caustic Recovery Using Membrane Filtration

    Abstract Food and beverage processors that use dilute caustic solutions for cleaning process equipment have shown increased interest in recovering the used caustic. The primary reason is that the price of caustic has increased significantly in the past year or so. Membrane filtration technology can be used to remove suspended solids (clarify with microfiltration) and/or dissolved ...


    By GEA Filtration

  • Benefits of membrane technology

    For years, coagulation and flocculation, along with settling and granular media filtration, sand filters, and precoat filters using diatomaceous earth, have been the “standard” for removing contaminants from water sources. However, since the early 1990’s membrane filtration has gained momentum and is now considered mainstream technology for this purpose. Advances in material science and membrane ...


    By Pall Corporation

  • Membrane contactors: an introduction to the technology

    Over the last 3 years, the designs of microporous membrane contactors for gastransfer applications have rapidly developed. These newly designed contactors have moved the technology from small Iaboratory-scale devices, hmited to 5to ...

  • A Membrane Pretreatment Technology

    Nearly all membrane systems, no matter what their raw water source, must utilize some form of pretreatment to remove unwanted organic and inorganic suspended solids. Bag and cartridge filters are efficient at removing suspended solids but must be replaced on a frequent and often costly basis. Some form of suspended solids removal system that cleans itself, maintains high flow rates and stays ...

  • UV Minimises Risks for Major Food Retailers

    For many years, one of the UK’s largest food manufacturers has made it their business to be the best at producing all manner of bespoke cooked and raw, ready-to-eat vegetables and carbohydrates for their customers, who include chilled food manufacturers, food-to-go operators and, of course, major supermarkets. Being the best means not only complying with food quality standards set by ...


    By atg UV Technology

  • Membranes: TOC reduction using membrane technology

    Honeywell’s Solid State Electronics Centre (SSEC) in Plymouth, Minn., had been trying to reduce the level of total organic carbon (100) in its high-purity deionized water system for many ...

  • 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 ...


  • Treating Industrial Water with Membrane Technology

    A variety of industries are finding that it makes sense to reevaluate the way they treat industrial process water, both to improve the quality of their products and increase the efficiency of their processes. Purification systems utilizing crossflow membrane filtration, such as reverse osmosis (RO), nanofiltration (NF) or ultrafiltration (UF) can be a good alternative to traditional filtration ...


  • 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 ...

  • 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

  • Economic and Environmental Benefits Flow From Filtration Technology

    Crossflow filtration operations typically fall into one of four categories: microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and hyperfiltration more commonly known as reverse osmosis (RO). The most common of the operations is reverse osmosis due to its ability to remove dissolved impurities including dissolved salts. Crossflow filtration machines typically include the membrane ...


  • Membrane treatment of the bleaching plant (EPO) filtrate of a kraft pulp mill

    The objective of this study was to evaluate the use of membrane technology to treat oxygen and peroxide-reinforced extraction stage (EPO) filtrate from a kraft pulp mill bleach plant. Three different types of tubular membranes were tested in a pilot plant: (i) tight ultrafiltration (UF); (ii) open UF followed by nanofiltration (UF + NF); and (iii) nanofiltration (NF). According to the ...


    By IWA Publishing

  • Select Engineering Principles of Crossflow Membrane Technology

    Introduction Since the 1959 development by Sourirajan of the first viable RO membrane, crossflow membrane technology has been applied to an ever increasing range of liquid separation processes and markets. In food and beverage applications, crossflow membrane technology is used to purify the liquids we drink, concentrate and reconstitute juices, dewater and purify dairy products, and to help ...


  • Self-Cleaning Pre-Filtration for RO and Other 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. ...

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