DESALINATION CASE STUDIES
Case Study: Chemplast Chooses Aquatech’s HERO™ & ZLD The Chemplast Mettur plant uses the Cauvery River as their main fresh water source. A strong industrial growth in recent years has resulted in water scarcity in the region. Industries are also required to follow strict environmental norms for discharging effluents. The intent of a Waste Water Treatment Plant was to have complete treatment, recycle and reuse of the combined waste water streams to reduce intake from the Cauvery River while not discharging any liquid waste streams. By Aquatech International Corporation
Case Study: Metropolitan Council Seeks Phosphorus Treatment Options In February 2004, Siemens Water Technologies, formerly USFilter, commenced a three-month service contract with the City of Rosemount, Minnesota for treatment of phosphorus in the effluent discharge from the city’s wastewater treatment facility.
Case Study: Membrane Filtration System Improves Water Sustainability At NEWater Plant In Changi, Singapore
Due to continuous growth in population and industry, wastewater management and reclamation is an important topic for Singapore to ensure a future sustainable water supply. Although water is precious for this city-state, so is space.
DESALINATION PRODUCTSMore Products
DESALINATION APPLICATION NOTES
Desalination Plants: YSI Instruments Monitor Flow & Water Quality At Multiple Stages Desalination is the process of removing salt from sea water or brackish river or groundwater to make potable water. By YSI
Membrane Degassing And Debubbling Of High Viscous Fluids With Liqui-Cel® And SuperPhobic® Membrane Contactors
DESALINATION WHITE PAPERS
Water Reuse Strategies: Steel Industry Case Studies
The steel industry has historically presented challenges for effective water treatment because it is a high water user and the applications may involve high heat, critical noncontact cooling, direct contact cooling, high suspended solids waters, oil and grease contamination, and complicated cascading. By Dave Christophersen, Veolia Water Solutions & Technologies
Recycling of gray wastewater as boiler make- up water was the challenge where silica value was typically 85 ppm in this secondary treated wastewater. This paper describes a new design called the High-Efficiency Reverse Osmosis selected for that task, discusses the project technical considerations and highlights the actual performance of the system.
Amiad Water Systems Amiad Water Systems has more than 40 years experience as an industry-leading supplier of automatic self-cleaning filters, valves and accessories.
Aquatech International Corporation Established in 1981, Aquatech International Corporation is a global leader in water purification technology for industrial and infrastructure markets with a focus on desalination, water reuse, and zero liquid discharge.
Filtronics, Inc. Filtronics has manufactured water and waste water treatment systems for industrial and municipal applications since 1974
PEPCON Systems PEPCON Systems (PEPCON) designs, manufactures and services equipment that utilizes a proven electrochemical process to safely and economically treat water and control odor in a variety of applications. These systems are marketed under the names ChlorMaster® and OdorMaster® and are available worldwide.
QUA® headquartered in USA, is a developer and manufacturer of leading-edge advanced membrane products used in the water, wastewater, and water reuse markets. Sold exclusively through a global network of qualified OEM's, QUA's product offering includes their innovative Fractional Electrodeionization (FEDI®) stack, which has superior hardness tolerance compared to the other electro-deionization products on the market and their NSF Certified Q-SEP® Ultrafiltration (UF) membranes.
Severn Trent Services
Severn Trent Services is a leading supplier of water and wastewater treatment solutions. We provide our clients with some of the industry’s brightest minds, advanced technologies, and quality products to provide you with truly efficient, cost-effective solutions to your water and wastewater challenges
Siemens Industry, Inc. - Water Technologies
Siemens is the world leader in products, systems, and services for water and wastewater treatment for industrial, institutional, and municipal customers
Veolia Water Solutions & Technologies
Veolia Water Solutions & Technologies offers comprehensive water and wastewater solutions for industrial and municipal customers. With unique technologies and process expertise, Veolia specializes in engineering, design, and project management, construction and execution.
Leopold -- A Xylem Brand
Leopold - A Xylem Brand has long been a worldwide leader a in the water and wastewater treatment industry supplying both filtration and clarification systems. Since its establishment in 1924, Leopold has pioneered and acquired a number of innovative technologies aimed at improving the quality of water while reducing costs.
DESALINATION VIDEOSMore Videos
Desalination is the process of removing salt and other minerals from saline water. In regions of the world where water is scarce, such as Saudi Arabia, desalination is seen as a viable alternative to more traditional potable water treatment. Desalination has also been used to produce a reliable water supply in tourist destinations such as Aruba. Desalination has also been gaining traction in areas of rapid population growth such as Singapore and Beijing.
Traditionally, desalination plants have been expensive in comparison to traditional drinking water plants due to the upfront financing costs, treated water transportation costs and ongoing energy and concentrate disposal costs. However, as technical innovation brings the energy cost of desalination down and populations continue to migrate to warm, arid climates such as Phoenix, AZ, desalination is starting to catch on as a viable alternative.
All desalination processes involve three liquid streams. The first stream is the saline feed water which is also called brackish water or seawater. The second stream is the low-salinity product or finished, treated water. The third stream is the byproduct of the desalination process, the very saline concentrate brine or reject water.
The primary desalination process being used commercially for drinking water treatment is reverse osmosis, where a semi-permeable membrane is used to separate the salt and other minerals from the pure water. A reverse osmosis desalination system consists of four major processes. During the pretreatment phase, the incoming brackish or seawater is pretreated to adjust its pH, remove suspended solids, and control scaling to avoid fouling the membranes.
During the second phase, pumps raise the pressure of the pretreated feed water to create the correct pressure differential between the pressurized feed water and the product water to move the permeate through the membrane. The pressurization phase is followed by the separation phase, creating a freshwater product stream and a concentrated brine reject stream. Two of the most popular reverse osmosis membranes used during this phase are the spiral wound and hollow fine fiber membranes.
The final phase of the desalination process is the stabilization phase that often requires a pH adjustment and degasification before being transferred into the drinking water distribution system.