ultrapure water treatment system Articles

  • A Case for Point-of-Use RO Ultrapure Water Systems

    ULTRAPURE WATER CRITERIA - AN OVERVIEW 'Pure water' is a relative term. Practically speaking, no water, naturally occurring or treated by man, consists solely of H2O molecules. Forever in pursuit of achieving equilibrium with its surroundings, water has unique characteristics that result in its ability to dissolve most matter. This property of water to dissolve and transport materials is ...

  • 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 ...

  • Water, Wastewater, and Filtration: World Markets Report

    Forecasts of the $183 billion market for water and wastewater treatment and filtration products and services including outsourcing. Also included are world forecasts for chemicals, cartridges, macro filtration, membranes, sedimentation, centrifugation, and ultrapure water ...


    By The McIlvaine Company

  • Add polish to high purity water

    Electrodeionization (EDI) has recently gained widespread acceptance by water treatment companies and end users alike for almost all applications requiring high-purity water. EDI has proven to be a reliable, cost-effective solution for both end users and water treatment companies. End users purchasing capital equipment can eliminate on-site chemical regeneration. Water treatment companies selling ...


    By Agape Water Solutions, Inc.

  • River water is filtered for use in an electronic disk manufacturing facility in Hokkaido, Japan

    New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) Phase I system in July, 1997, and the Phase II system in August 1998 at a major international electronic disk manufacturing facility at Hokkaido Island located in Northern Japan. The VSEP is used for treatment of river water for ultrapure water production at this facility. The VSEP system uses an ultrafiltration ...


    By New Logic Research, Inc.

  • VSEP treats well and surface water to provide ultra clean drinking water

    New Logic Research manufactures a proprietary vibrating membrane filtration system that is uniquely suited for treatment of commercial and domestic drinking water. The use of a vibrating membrane mechanism to avoid membrane fouling is new and is just the kind of improvement needed to make the use of membrane filtration an effective and economical treatment solution for drinking water. New Logic ...


    By New Logic Research, Inc.

  • Methods of Water Purification

    This article is excerpted from 'Pure Water Handbook' published by OsmonicsĀ®, 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 ...

  • 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 ...


  • Spiral wound electrodeionization

    Electrodeionization (EDI) is typically used in combination with RO systems to produce pure or ultrapure water, continuously and without chemicals. This combination eliminates the need for regeneration chemicals and the inherent cost, safety and inconveniences of storage, handling, treatment and discharge associated with ion exchange systems. Power plants, electronics manufacturers and ...


    By Agape Water Solutions, Inc.

  • VSEP takes reverse osmosis where it has never been before, further concentrating RO reject (brine) streams to increase overally recovery to 99%.

    Conventional spiral wound membrane systems using reverse osmosis or nano-filtration membranes are increasingly being used to treat well water from underground sources to supplement local drinking water supplies. Many of the remaining underground water sources are 'Brackish' water sources where the dissolved solids can be 5,000 mg/L or even higher. One of the difficult engineering aspects of ...


    By New Logic Research, Inc.

  • Experimental study of the degradation of 2,4-D induced by vacuum-UV radiation

    Vacuum-UV (VUV) photoinduced degradation of the herbicide 2,4-D was studied. A flow-through VUV photoreactor was used (i) in batch mode to study the kinetics of degradation and (ii) in continuous mode under steady state to analyze the potential utilization of this process in commercial applications. In both cases, the reactants were recycled to minimize diffusive resistances. Experimental results ...


    By IWA Publishing

  • Membrane fouling

    The Problem: Membrane water treatment is costly and complex due to the systems required to mitigate membrane fouling. Membranes have, therefore, been relegated to high value applications such as desalination and ultra-pure water needs. The systems used to mitigate fouling have a history of underperformance and high cost. EconoPure Solution: EconoPure has ...


    By EconoPure Water Systems, LLC

  • Organics Monitoring: A Practical Guide

    Preventing product loss, lowering waste treatment costs, and reducing system maintenance and energy consumption through organics monitoring in the chemical, refining, food, and wastewater treatment industries. Summary Process water and steam condensate contamination includes organic, inorganic, and biological components. Sources of organic contamination include process ...


    By GE Analytical Instruments

  • Kurita chemical deal solves sales dilemma

    The Japanese company has drastically ramped up its presence abroad with its first foreign acquisition in 16 years. The European sales boost will see the overseas chemicals business streak ahead of the facilities division. Kurita Water Industries has made a crucial step away from a sluggish home market in Japan with its first overseas acquisition since buying Hansu Technical Service in 1998. It ...


    By Kurita

  • Reverse Osmosis Element Design

    Introduction  TORAY REVERSE OSMOSIS MEMBRANE ELEMENTS are functional membrane elements with excellent quality and high performance developed with the polymer engineering expertise Toray has gained over the years. Toray Reverse Osmosis Membrane Elements are high rejection and high flux RO elements that have been meeting the high level requirements of our customers in many applications: ...


    By Toray Membrane Europe

  • RO Feedwater: Treat It Right

    Summary Crossflow membrane filtration systems, such as reverse osmosis (RO), nanofiltration (NF) or ultrafiltration (UF), are good alternatives to traditional filtration and chemical treatment. However, to get the best performance from them, careful attention must be paid to feedwater conditions. Pretreating feedwater can lengthen the life of membrane elements, improve the quality of the ...

  • Chloramines

    OVERVIEW When chlorine is added to a water supply containing certain organics, the formation of halogenated organics occurs. Called 'trihalogenated methanes' (THM's) these reaction products are suspected carcinogens and maximum allowable limits in municipal supplies are imposed by the U.S. Environmental Protection Agency (EPA). To reduce the potential for the formation of THM's, many U.S. ...

  • The Benefits Of UV Disinfection In The Pharmaceutical Industry

    The quality standards required for purified water in the production of pharmaceuticals have never been stricter, with manufacturers having to conform to an ever increasing number of international standards. Craig Howarth, Managing Director of Hanovia Limited, introduces a number of interesting new developments in UV technology for disinfection and dechlorination. ...

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