Water purification is the removal of contaminants from untreated water to produce water that ispureenough for a specific purpose. Most water is disinfected for human consumption (drinking water) but water purification is also required for a variety of chemical, industrial, medical and pharmaceutical processes. General methods are:
physical filtration which includes media filtration, microfiltration, nanofiltration, ultrafiltration and reverse osmosis.
chemical filtration which includes coagulation, flocculation, ion exchange (demineralization, water softening), disinfection, electrodeionization
biological treatment
Electrodeionization
The EDI process produces industrial process water of very high purity, using less than 95% of the chemical products used in the conventional ion exchange processes. Two separation technologies, membranes and ion exchange, are combined into one sealed, self-contained unit. The distinct spiral-wound design of DOW™ EDI modules offer a chemical-free alternative to mixed-bed ion exchange resins for polishing RO permeate—an ideal choice for high purity water needs when combined with RO membranes and ion exchange resins.
Dow Water & Process Solutions is a recognized world leader in RO technology offering FILMTEC™ and HYPERSHELL™ reverse osmosis (RO) and nanofiltration (NF) elements for a variety of industries and applications including industrial water treatment, power generation, food & beverage processing, municipal desalination and water reuse, and home drinking water devices. The FT30 membranes which have long been the industry standard feature a spiral wound design and are thin film composite elements.
Contact us for:
• Membrane replacement
• Increased output and water recovery
• Improved quality
• Lower energy costs
A complete range of water treatment plants and equipments to meet your water purification needs. Our capabilities include plant design, monitoring, maintenance, troubleshooting and technical support services.
• Reverse Osmosis
• Nanofiltration
• Ultrafiltration
• Ion Exchange
• EDI Systems
• Filters Housings
• Multimedia Filters
• RO Pressure Vessels
Dow offers the world’s most comprehensive line of ion exchange resins under the AMBERLITE™, AMBERJET™, DOWEX™, MARATHON™, and MONOSPHERE™ brands for applications from industrial water softening, demineralization, production of ultrapure water, condensate polishing, sweetener purification and metal recovery (mining).
• Industrial Water Resins
• Power Generation Resins
• Ultrapure Water Grade Resins
• Food Grade Resins
• Chemical Process & Mining
• Drinking Water Grade Resins
Ultrafiltration (UF) is becoming the preferred process for water filtration over conventional technology such as media filtration in many applications. Ultrafiltration provides safe, high quality effluent that can be used for a multitude of applications. Typically, ultrafiltration will remove bacteria, viruses colloidal materials, and silt from water.
Dow’s ultrafiltration modules (UF), features high clean-ability, low chemical consumption, high recovery, superior combination of mechanical properties and chemical resistance set the standard for RO pre-treatment, drinking water production, and wastewater treatment applications. The SFP/SFD series offers customers a proven product with a long list of installations world-wide.
