reverse osmosis membrane failure Articles

  • A study of the physical and chemical damage on reverse osmosis membranes detected by autopsies

    Abstract Water treatment by reverse osmosis technology has as main aim to reject the maximum percentage of ions from raw water, giving as much treated water flow as possible. When there is a loss in these two parameters performance, it is essential to find the source of the failure, in order to use the necessary tools for its recovery. At this point, membrane autopsies are a very ...

  • Reverse Osmosis Technology – KURIVERTER RC - Case Study

    Summary Applications using Reverse Osmosis membrane technologies are everywhere in our lives – from tiny under counter units polishing our drinking water through industrial units preparing water for processes or purifying effluents for reuse and massive seawater desalination plants producing thousands of m³ of drinking and irrigation water every day. The membranes used in this ...


    By Kurita

  • Suitability of cationic flocculants for RO membranes performance improvement

    Abstract As it has already been published and demonstrated, one of the main causes of membranes failures is related to a poor plant pre-treatment. Data from more than 600 autopsies demonstrated that both biofilm and colloidal matter are the most common components on RO (reverse osmosis) membranes fouling, therefore, main lack on membranes pre-treatment is related to disinfection and ...

  • Results from 99 seawater ro membrane autopsies

    Abstract This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors discuss historical results of membrane autopsies and link recent trends and changes in plant design to potential fouling and ...

  • Removing biofilm from membranes – a practical approach

    Abstract Within the lifetime of most reverse osmosis (RO) systems some fouling will adversely affect membrane performance.One of the major foulants identified on lead membranes during a decade of membrane autopsy at the Genesys Membrane laboratory is biological fouling (biofouling). All raw water sources contain microorganisms such as algae, bacteria and fungi. They also contain ...

  • Application of Membrane Technology for the Recovery and Reuse of Water

    Abstract As water and sewer costs are expected to increase over the next decade, membrane technology will continue to be a viable and economical option in the recovery and reuse of water. This paper describes the mechanism of membrane effected separation (specifically reverse osmosis, ultrafiltration and microfiltration), membranes commercially available, membrane element configurations, and how ...


  • 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

  • Conception and optimization of a membrane electrode assembly microbial fuel cell (MEA-MFC) for treatment of domestic wastewater

    A membrane electrode assembly (MEA) for microbial fuel cells (MEA-MFC) was developed for continuous electricity production while treating domestic wastewater concurrently. It was optimized via three upgraded versions (noted α, β and γ) in terms of design (current collectors, hydrophilic separator nature) and operating conditions (hydraulic retention time, external resistance, aeration rate, ...


    By IWA Publishing

  • Micro-media filtration: superior pre-filtration for desalination systems

    Introduction To ensure trouble free-operation of seawater desalination systems, membrane manufacturers recommend removal of suspended solids to negligible levels, as even small amounts of solids adhering to the surface of the membrane elements may adversely foul the membranes, deteriorate permeate quality and reduce membrane life. The past two decades have seen a dramatic increase in the ...


    By Eco-Tec Inc.

  • Nanofiltration: properties and uses

    Untitled Document Koch Membrane Systems' Henia and Jorge Yacubowicz outline the uses and benefits of nanofiltration. ...

  • HS-200 Stands the test of heavy manufacturing

    A manufacturer of aircraft component generates a free and emulsified oily wastewater, which results from their machining, milling, cutting, and other operations. Presently, they are using skimmers and dissolved air flotation to remove oil from the water. To remove their heavy metals they follow up with flocculation, precipitation and clarification. Due to the rapidly ...


    By Hydrosil International

  • Desalination pre‐treatment with LFNano

    EconoPure Water Systems EconoPure Water Systems designs and manufactures highly economical, scalable, low‐fouling. membrane systems. The Company leverages the proprietary low‐fouling nanofiltration. (“LFNano”) system consisting of a unique membrane element that is designed to avoid. particulate fouling, biofouling, and scaling. As the name suggests, the LFNano ...

  • Sea Water Desalination - Technical Article

    Sea Water Desalination is a specific process involving molecular separation via membrane technology to reduce the dissolved salt and mineral content of sea water to a level suitable for human and animal consumption, commercial/industrial and irrigation uses. This process involves three water streams namely sea water as the intake source, Product / Permeate water of potable drinking water quality ...

  • Power Plant Improves Operating Efficiency with Culligan Matrix Solutions

    Challenge A large chemical manufacture was challenged with boiler tube failures in its power plant, resulting in costly repairs and down time. The boiler tube failures were a result of the incoming water quality to the power plant. Until recently, the boiler make-up water was treated with a combination of carbon media filtration and softening. As a result less than 50% of condensate was ...


    By Culligan Matrix Solutions

  • Methods of Water Purification

    This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface water or groundwater. The majority of public or ...

  • Advanced Water Treatment Technologies May Bring Purified Water to San Diego

    'In four years, half of San Diego may be filling its glasses with tap water that once ran through its toilets,' reported the San Diego Union-Tribune recently. A plan to mix 'repurified water' with the City's raw drinking water reservoir could become a reality, thanks to the wonders of water treatment technology. Such a possibility elicits various reactions including disgust, marvel and fear. ...

  • What Is a Boiler Feed Water Treatment System and How Does It Work?

    For industrial companies using a boiler for its facility, some type of boiler feed water treatment system is usually necessary to ensure an efficient process and quality steam generation. The most appropriate boiler feed water treatment system will help the facility avoid costly plant downtime, expensive maintenance fees, and boiler failure as a result of scaling, ...


    By SAMCO Technologies, Inc.

  • Aquantum Slides to Victory with Xylem

    When it comes to winter sports, some things are essential but nothing perhaps more so than snow and, in this instance, ice. As with many sports, conditions have to be right, with too many moisture and temperature fluctuations posing a real risk to the safety of athletes. For engineering company Aquantum, this was a primary concern for the bobsleigh track in Sochi, ...


    By LOWARA S.r.l.- a Xylem brand

  • Common Boiler Feed Water Treatment Issues and How to Avoid Them

    When treating boiler feed water (the combination of boiler makeup and condensate return water), several issues can arise that cause boiler scaling, corrosion, fouling, and system failure. Below, we break down the most common boiler feed water issues and how to avoid them to help ensure system efficiency and operational safety. While treating boiler feed water is extremely ...


    By SAMCO Technologies, Inc.

  • Is Green a Color or an Objective?

    “Environmentally friendly” is a term that is applied with a spatula in today’s products’ labels in ever increasing numbers.   What does it mean?  Does it mean it’s better for nature, people, pets, or for the profit line of the company offering it?    In the industry and elsewhere, we see a marked ...

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