reverse osmosis chemical Articles

  • 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

  • Reverse osmosis system to reclaim wastewater

    The Facility Pragati Power Corporation Limited, formerly Delhi Vidyut Board (DVB), was formed by the Government of National Capital Territory (NCT) of Delhi in 1997 for the purpose of generation and distribution of power to the entire area of NCT of Delhi. To bridge the gap between demand and supply and to have reliable power supply to the capital city of Delhi, a 330 MW combined cycle Gas ...

  • Reverse Osmosis Technology - Kuriverter Rc.

    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

  • 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 concentrate treatment by chemical oxidation and moving bed biofilm processes

    In the present work, four oxidation techniques were investigated (O3, O3/UV, H2O2/O3, O3/H2O2/UV) to pre-treat reverse osmosis (RO) concentrate before treatment in a moving-bed biofilm reactor (MBBR) system. Without previous oxidation, the MBBR was able to remove a small fraction of the chemical oxygen demand (COD) ...


    By IWA Publishing

  • Innovative seawater intake for reverse osmosis desalination plants

    Seawater desalination plants typically consist of four major unit operations: seawater intake, pretreatment, Reverse Osmosis (RO) stage, and posttreatment and brine discharge. The best way is to go through vertical beach wells, but the increase of the production capacity of the plants built in recent years makes open intake the only solution. These open ocean intakes draw seawater through the ...


    By Inderscience Publishers

  • 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

  • Electronic Water Treatment Reduces Fouling In Reverse Osmosis

    Reverse Osmosis (RO) is used in processes requiring high-quality, purified water, such in semi-conductor processing or biochemical applications and can be used to treat boiler feed water, industrial wastewater or process water. A water purification technique, it reduces the quantity of dissolved solids in solution. RO uses waterline pressure together with energy consuming pressurizing pumps that ...

  • Control of metal oxide fouling in reverse osmosis

    High levels of iron and manganese, along with large quantities of dissolved gases in the wells created concern for the viability of a conventional desalination design for the proposed City of Camarillo groundwater desalination facility. To identify viable pre-treatment process(es) for the control of metal oxide fouling in reverse osmosis, a 12-month pilot study was undertaken. The pilot study ...


    By Toray Chemical Korea

  • Innovations in the inhibition of reverse osmosis membrane scaling and fouling

    Abstract: Scaling and fouling of membranes is an on-going performance issue for most plants. There are continual improvements in membrane technology and plant design which increase efficiency, water quality and utilise different raw water supplies to produce clean pure water. This presentation outlines innovations in laboratory services and speciality chemicals designed to inhibit membrane ...

  • Improvement of Electrodeposition Paint Processes with Reverse Osmosis

    Abstract For over 15 years, membrane separation processes have been very effectively utilized as essential components of electrodeposition (ED) paint processes. ED is the accepted method of applying the undercoat paint layer to new automobiles and appliances. As cross-flow membrane and ED paint technologies mature, new applications combining the two have been developed. A major American ...


  • Reverse osmosis system reclaims 86% wastewater in singapore

    The Problem Singapore, a small island-state with few natural resources, currently imports about half of the country’s potable water supply from neighboring Malaysia and efforts are being made by the Singapore government o reduce dependence on imports. The increased success of recycling and reuse of waste water in Singapore is a key strategy to Singapore’s increased self ...

  • Reverse Osmosis and Electrodeionization Alternate to Service DI

    Electrodeionization (EDI) is a chemical free water treatment technology that eliminates the need for off line chemical regeneration. EDI has gone from an unproven and unknown commodity to one that has revolutionized the industry in the past 20 years. Much has been written and discussed about the use of EDI systems for industrial applications such as power plants and semiconductors, where flows ...


    By Agape Water Solutions, Inc.

  • Control of metal oxide fouling in reverse osmosis

    High levels of iron and manganese, along with large quantities of dissolved gases in the wells created concern for the viability of a conventional desalination design for the proposed City of Camarillo groundwater desalination facility. To identify viable pre-treatment process(es) for the control of metal oxide fouling in reverse osmosis, a 12-month pilot study was undertaken. The pilot study ...


    By Toray Chemical Korea

  • Influence of feed quality on seawater reverse osmosis performance

    The trouble-free operation of a Reverse Osmosis (RO) plant relies on the quality of the treated feed water, which highlights the need for optimisation of the pre-treatment steps. The quality of raw seawater varies with time in terms of suspended and colloidal load, along with the dissolved salt content. In a conventional pre-treatment scheme, consisting of clarification and particulate and micron ...


    By Inderscience Publishers

  • CSM fouling resistant reverse osmosis membranes

    This paper particularly deals with new fouling resistant RO membranes which are made more hydrophilic and less changed or charged with the same charge as the foulants to reduce hydrophobic interaction and charge attraction or to increase charge repulsion, respectively. The fouling resistant membranes manufactured by Woongjin Chemical in Korea are coated with hydrophilic monomers followed by ...


    By Toray Chemical Korea

  • Chemicals in reverse osmosis-treated wastewater: occurrence, health risk, and contribution to residual dissolved organic carbon

    The quality and safety of reverse osmosis (RO)-treated secondary wastewater (WW), for indirect potable re-use, was assessed using a dataset of 375 chemicals measured in RO-treated WW. A screening health risk assessment indicated that four N-nitrosamines were of potential concern, although median concentrations of these chemicals were always below health values. The most frequently detected ...


    By IWA Publishing

  • Experiences with the conventional pretreatment system in the seawater reverse osmosis plant at Kalpakkam

    A 1800 m³/day Seawater Reverse Osmosis (SWRO) plant was commissioned in October 2002 at Kalpakkam, India, as part of the Nuclear Desalination Demonstration Project (NDDP). The conventional pretreatment scheme was adopted consisting of a lamella clarifier, pressurised sand filter, activated carbon filter and cartridge filter. The dosing of pretreatment chemicals, ferrous sulphate and ...


    By Inderscience Publishers

  • Nutrient removal in reverse osmosis concentrates using a biological aerated filter

    The aim of this study is to employ a biological aerated filter (BAF) in the treatment of reverse osmosis (RO) concentrate received from reuse of treatment plant wastewater. Furthermore, the influence of chemical oxygen demand (COD)/N ratio on the nutrient removal was analyzed to find the detailed removal pathways of nutrients. The result was found to be high efficiency for biochemical oxygen ...


    By IWA Publishing

  • 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

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