Seawater Reverse Osmosis Articles

  • Boron removal from brackish water by reverse osmosis and nanofiltration membranes: application of Spiegler–Kedem model and optimization

    Drinking water should contain certain chemicals only in limited quantities. Boron, one of these chemicals which is considered as a threatening compound and is difficult to eliminate from water. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) process which can contribute to the removal of this inorganic element from brackish water. For this ...


    By IWA Publishing

  • QUA`s Q-SEP Ultrafiltration Membranes Utilized at Hinduja Power Plant

    Overview Visakhapatnam (also known as Vizag) is a city located in the state of Andhra Pradesh in India that has a growing need for a wider electricity network to serve its citizens and industrial activity. To address this need, Hinduja Power decided to build a 1040 MW coal fired power plant to provide power not only to Visakhapatnam, but also throughout the state and to other states in ...


    By QUA Group LLC

  • 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 ...

  • Innovations in the inhibition and cleaning of reverse osmosis mebrane scaling and fouling - Case Study

    Abstract: Scaling and fouling of membranes are an on-going performance issue for most plants This presentation outlines innovations in speciality chemicals designed to inhibit membrane scaling and fouling and to clean membranes where deposition has occurred. High phosphate waste water reuse RO plant – There is an increasing trend to treat recycled waste water and use ...

  • Commercial RO Package, Jordan

    INTRODUCTION In April 2013, Pure Aqua, Inc. designed and manufactured a commercial RO package to a major hotel in Jordan to remove, chlorine, TDS, and odor from well water. The package consisted of pre and post treatments including a multimedia filter and chemical dosing systems. The brackish ...


    By Pure Aqua, Inc.

  • Commercial SWRO Machine, Philippines

    INTRODUCTION In April 2013, Pure Aqua successfully manufactured and supplied a commercial SWRO machine to a major company in the Philippines. The machine came complete with an advanced microprocessor control along with pretreatments consisting of a ...


    By Pure Aqua, Inc.

  • Evaluating impact of fouling on reverse osmosis membranes performance

    Abstract Membrane fouling is commonly defined as an undesirable formation of deposits on mem- brane surfaces and it is considered a major problem in most brackish, seawater, and waste water reclamation applications. Depending on nature of the scale and foulant, fouling pro- cesses will lead to decreased membrane fluxes, increased pressures needs, and/or increased permeate conductivity. ...

  • Preservation of reverse osmosis membranes with non oxidizing biocides – comparison with SMBS

    Sodium metabisulphite (SMBS) is the current standard preservation chemical used in RO plants during shut down. It is a cheap and efficient preservative, but its tendency to oxidize easily has several drawbacks. The use of a non-oxidizing biocide instead could solve some of the issues currently seen with the SMBS, but little has been reported about membrane compatibility and preservation ...


    By IWA Publishing

  • Removal of micropollutants and NOM in carbon nanotube-UF membrane system from seawater

    One of the main problems for seawater reverse osmosis desalination is membrane fouling associated with natural organic matter. Bisphenol-A (BPA) and 17α-ethinylestradiol (EE2) are well-known endocrine-disrupting compounds that have been detected in wastewater and seawater. In this study, the contribution of carbon nanotubes (CNTs, single-walled carbon nanotubes) to membrane fouling control and ...


    By IWA Publishing

  • Study on performance of ultrafiltration membrane-based pretreatment for application to seawater reverse osmosis desalination

    The objective of the work was to study at lab-scale the efficiency of hybrid process- coupling powdered activated carbon (PAC) adsorption or FeCl3 coagulation and UF- for marine organic matter removal. Regenerated cellulose membrane with 30 kDa and actual seawater from Mediterranean Sea were used. The coagulant was FeCl3 and adsorbents were two PAC types, with different surface area and pore ...


    By IWA Publishing

  • Study on performance of ultrafiltration membrane-based pretreatment for application to seawater reverse osmosis desalination

    The objective of the work was to study at lab-scale the efficiency of hybrid process- coupling powdered activated carbon (PAC) adsorption or FeCl3 coagulation and UF- for marine organic matter removal. Regenerated cellulose membrane with 30 kDa and actual seawater from Mediterranean Sea were used. The coagulant was FeCl3 and adsorbents were two PAC types, with different surface area and pore size ...


    By IWA Publishing

  • High performance boron removal from seawater by two-pass SWRO system with different membranes

    Boron in the desalinated water produced by the seawater reverse osmosis (SWRO) system is one of the most challenging issues for drinking or irrigation water uses. In recent years, many post-treatment methods and designs for boron elimination have emerged and attracted lots of attention, but only a few cases have demonstrated high performance and economic efficiency. The main aim of this work was ...


    By IWA Publishing

  • Depth exposed membrane for water extraction (DEMWAX) for seawater desalination

    Introduction The Depth Exposed Membrane for Water Extraction (DEMWAX) is a novel approach to both fresh surface water treatment and seawater desalination that deploys a system directly within the source water body. The DEMWAXTM system is configured to take advantage of the natural (free) pressure of the source water body to drive a membrane process. This configuration has many advantages ...


    By EconoPure Water Systems, LLC

  • Cogenerative seawater reverse osmosis. Part 1: elements characteristics

    This work is a part of an extensive study performed in the area of cogenerative seawater Reverse Osmosis (RO) design, appraisal and rehabilitation. It is concerned with large-scale contiguous seawater RO systems, focusing on the 8040-type membranes of high-flow and high-salt rejection ranging in area from 300 to 400 ft². Seventeen types of membranes are selected between large- and medium-sized ...


    By Inderscience Publishers

  • On the performance limitation of reverse osmosis water desalination systems

    The performance of Reverse Osmosis (RO) water desalination processes was investigated using a simulated brackish water plant based on spiral-wound membranes. A semi-rigorous mathematical model was employed in the simulation to calculate the water and salt fluxes at any point along the filtration channel. The effects of two key parameters, namely the transmembrane pressure and membrane surface ...


    By Inderscience Publishers

  • Fouling and cleaning of seawater reverse osmosis membranes in Kalpakkam nuclear desalination plant

    A seawater reverse osmosis plant of 1800 m³/day capacity is part of the 6300 ³/day capacity nuclear desalination demonstration project at Kalpakkam. The plant was commissioned in October 2002 and is in continuous operation. This paper deals with types of foulants, membrane cleaning procedures and the improvement in the reverse osmosis system after cleaning. This paper also describes the analysis ...


    By Inderscience Publishers

  • Experiences in the construction and operation of a nuclear desalination demonstration plant

    A hybrid desalination system of 6300 m³/day capacity has been envisaged, comprising 4500 m³/day Multi-Stage Flash (MSF) and 1800 m³/day Seawater Reverse Osmosis (SWRO) plants, and sharing basic utilities with Madras Atomic Power Station. The SWRO plant has been commissioned and has been operating for more than two years. The MSF plant is under construction. The construction of the MSF plant has ...


    By Inderscience Publishers

  • Features of Reverse Osmosis (RO)

    1. Removal of dissolved salts  Reverse osmosis can stably and effectively remove dissolved salts, dissolved organic substances (trihalomethane, its precursors, agricultural chemicals, etc.), and micro fine particles (living germs, dead germs, and many other micro fine particles) from water. Thus it is ideal for a wide area of applications ranging from production of ultra pure water to ...


    By Toray Membrane Europe

  • Seawater feed reverse osmosis preheating appraisal, Part I: leading element performance

    This paper is concerned with the seawater reverse osmosis preheating process, and presents a parametric study of the process. The basic transport equations describing the leading element are exhibited and appraised. The leading element, which governs the whole system performance, is studied and analysed. The incorporated and investigated operating parameters are the feed pressure and the ...


    By Inderscience Publishers

  • Evaluation of new generation brackish water RO

    Since the development of brackish water reverse osmosis (RO) membranes their use has seen rapid development.  All major RO membrane manufacturers have developed one or more brackish water RO membranes.  In the last ten years these membranes have seen a large decrease in price and an increase in productivity making brackish groundwater desalination an attractive option in water scarce regions.  ...


    By Toray Chemical Korea

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