electrodialysis reversal Articles

  • Low energy/cost desalination: low dose and low mean ion resident time in concentrate stream of electro-dialysis reversal

    Species, dose, and mean ion resident time (MIRTc) in the concentrate of electro-dialysis reversal (EDR) desalination are analysed. In the classical EDR, dimensions, flow, and velocity of dilute and concentrate are equal; Langelier saturation index (LSI) and CaSO4 saturation are used to control the scaling and fouling processes in concentrate, as such LSI ...


    By IWA Publishing

  • Seawater desalination technologies

    The distribution of the total water available in various places on the earth is delineated in this paper. This paper discusses various desalination technologies like membrane technology and thermal technology. Membrane technology includes Reverse Osmosis and Nanofiltration, Electrodialysis and Electrodialysis Reversal, whereas thermal technology includes Multi-Stage Flash (MSF) Distillation, ...


    By Inderscience Publishers

  • Brackish water desalination technologies

    This paper classifies various types of water according to their total dissolved salt content. It then discusses various technologies for brackish water desalination and their advantages and disadvantages. These technologies include different thermal processes as well as membrane processes. The thermal processes include Multistage Flash (MSF), Multieffect Distillation (MED) and Vapour Compression ...


    By Inderscience Publishers

  • Role of membranes and activated carbon in the removal of endocrine disruptors

    As part of an American Water Works Association Research Foundation (AwwaRF) research project to evaluate conventional and advanced treatment processes for the removal of endocrine disruptors and pharmaceuticals (Project #2758), several experiments were conducted using membranes and activated carbon. A series of dynamic flow-through membrane experiments were performed at pilot- and full-scale to ...


    By Toray Chemical Korea

  • Spiral wound EDI technology part 1

    Water purification by reducing the concentration of ionic impurities has been an area of considerable technical interest. Water treatment technologies have rapidly advanced in recent years to where a myriad of options have been developed for this purpose. The most well-known processes include electrodialysis, electrodeionization (EDI), liquid chromatography, membrane filtration, and ion exchange. ...


    By Agape Water Solutions, Inc.

  • Mild desalination of various raw water streams

    For chemical industries, fresh water availability is a pre-requisite for sustainable operation. However, in many delta areas around the world, fresh water is scarce. Therefore, the E4Water project (www.e4water.eu) comprises a case study at the Dow site in Terneuzen, The Netherlands, which is designed to develop commercial applications for mild desalination of brackish ...


    By IWA Publishing

  • Selection and economical evaluation of solar desalination technologies via DesalSolar software

    Worldwide projection indicated that in 2020 the situation of water resources in Iran reach to scarcity. Besides, global warming and energy crisis have forced countries to use renewable energy resources. Solar desalination technologies particularly in remote area of Iran could be a method to emancipate from this crisis. In this paper, all kind of desalination technologies were reviewed. Then, ...


    By Inderscience Publishers

  • Existing & emerging concentrate minimization & disposal practices for membrane systems

    As water demand increases and freshwater sources are becoming increasingly stressed in the U.S., there is an impetus for water utilities to treat impaired water sources such as brackish groundwater, irrigation return water, and seawater to meet increasing demands. The efficiency of desalination technology used to treat such waters has improved over the last decade, but there are currently certain ...


    By Lesico CleanTech

  • Defluoridation of drinking water using metal embedded biocarbon technology

    The water that circulates in contact with fluorinated ores is particularly rich in fluoride. The beneficial and the harmful effects of fluoride consumption are well documented. The dental and skeletal fluorosis is the widespread harmful effects of a long consumption of fluoride. WHO recommended level of fluoride in drinking water is 1.5 mg/L. Different methods have been tested for defluoridation ...


    By Inderscience Publishers

  • Efficient Biodestruction of Wastewater-Blended, Oxidant-Laden Residual Streams

    A disadvantage of using separation-based oxidant (i.e., perchlorate, nitrate, bromate) treatment technologies (e.g. ion exchange or membranes) is that they produce an oxidant-laden concentrate that must be disposed or further treated. “Conventional” biological processes can be used to treat oxidant residuals but typically require a dedicated deoxygenation step, inoculation with exogenous ...

  • Evaluation and Testing of Technologies for Brine Minimization at Eastern Municipal Water District

     ABSTRACT Eastern Municipal Water District (Eastern) in Southern California is facing increasing brine disposal challenges at its two inland desalter facilities. In most cases at inland sites, the disposal of brine involves either the dilution of the waste stream in another receiving body or the concentration of brine solutions (Truesdall et al., 1995). In the case of Eastern, brine ...

  • Fluoride sorption using morringa indica –based activated carbon

    Fluoride is an important micro nutrient for the production and maintenance of healthy bones and teeth. Although a certain amount of fluoride gives good protection against dental decay, excess intake of fluoride ions cause dental fluorosis. When the concentration of fluoride is more than 4 mg/L it causes softening of bones, ossification of tendons and ligaments and neurological damage in severe ...


    By University of Tehran

  • Evaluating Traditional and Innovative Concentrate Treatment and Disposal Methods for Water Recycling at Big Bear Valley, California

    ABSTRACT The Big Bear Area Regional Wastewater Agency (BBARWA) recently completed a study of advanced water reclamation as a means to augment existing potable water supplies for the residents and visitors of Big Bear Valley. Potable water is provided by local groundwater (GW); during periods of drought or prolonged dry weather water demand can exceed supply. The use of recycled water, ...

  • Picking Their Membranes - Part I -

    Membrane use by water suppliers may not be new, but suppliers are considering membranes in new ways -- by number and variety of applications. Membranes can work on a wider range of resource waters, more efficiently and for less cost than before. Among membranes' attractions as substitutes for conventional water-treatment technologies, such as filtration, distillation and ion-exchange are: ...


  • 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 ...

  • Innovative Approaches to RO Concentrate Management: Beneficial Reuse and Concentrate Minimization

    ABSTRACTDesalination of brackish waters and reclaimed waters using reverse osmosis (RO) is often limited by the options available for concentrate disposal, particularly in inland areas. Dewatering the concentrate is alternative approach to disposal but the available thermal and membrane technologies are still cost prohibitive for most applications. Beneficial reuse of the RO concentrate ...

  • Case study: How to purify Hexavalent Chrome Wastewater

    We all talk about priority pollutants, about hazardous substances and discharge to the atmosphere etc. which are dangerous for our environmental. Day by day we adopt new laws and regulations to protect our green future. So, what is that “priority pollutants”? Priority pollutants are highly toxic chemicals. The list of these chemicals is quite large and includes thousands of items but ...


    By PC GlobeCore

  • Utilizing unconventional water sources for industrial reuse

    Reclamation and reuse of unconventional wastewater sources for plant raw water, cooling water and process pre-treatment has increased substantially due to increases in the cost of drinking water, recurring water shortages that can impact business operations, and tightening government regulation. Water is required in almost every industrial sector for the processing and manufacture of products. ...


    By WesTech Engineering, Inc.

  • San Joaquin Valley California - Arsenic removal from ground water

    Background The San Joaquin Valley of California is approximately 220 miles long and varies in width to a maximum distance of approximately 80 miles. The occurrence of groundwater over the entire extent of the valley is abundant. Recharge for the varied depths of aquifers is from precipitation in the form of rain and the snow pack from the western Sierra Nevada Mountain Range. High ...


    By Filtronics, Inc.

  • ASTM Standards Help Meet Need for Clean Water

    The new ASTM Water Portal provides a single access point to standards and related information about ASTM International’s diverse committees working to protect and monitor this vital global resource. Clean and safe water is the underpinning of the quality of life for people around the world. Global economies depend on water, whether it’s to support the manufacturing of goods ...


    By ASTM International

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