Water. desalination + reuse

DWR NovDec 2015

Water. Desalination + reuse

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SHOWCASE | 14 | Desalination & Water Reuse | November-December 2015 Oasys Water has recently unveiled its latest development in zero liquid discharge (ZLD) technology to address challenges in wastewater treatment in different regions and industries. The product extends the firm's ClearFlo Water transformation products. Oasys said its ClearFlo Complete solution can overcome the hurdles encountered in handling wastewater from industrial processes to "convert the entirety of this wastewater back into a quality sufficient for reuse." The ZLD system would, according to Oasys, "minimize the use of costly and challenging thermal technologies," by boosting the amount of water recovery of membrane processes. Oasys said ClearFlo Complete could recoup more than 90% of the water in waste streams using a "simple and reliable membrane process" thereby leaving a much-reduced volume of water to be recovered by more costly and energy-intensive crystallization. The system combines pretreatment with Oasys' trade-marked membrane brine concentrator and a heavily reduced-capacity crystallizer. "The combination of rapidly increasing water scarcity and the need to reduce massive challenges in global industrial water pollution demands the water industry responds with solutions that can tackle these issues in a cost-effective manner," said president and chief executive of Oasys Water, Jim Matheson. He went on to pledge that Oasys would further extend the ClearFlo offering "in the near future." Oasys claims ClearFlo Complete, provides complete liquid recovery for complex wastewater streams from 300 m 3 /day to greater than 10,000 m 3 /day. It said the system was "ideally suited for complex wastewater applications such as coal-fired generation flue gas desulphurization, cooling tower blowdown, oil and gas, mining, textile processing, and saline chemical process wastewater recovery and reuse." Oasys said demand for ZLD was growing out of strict government regulations to deal with "dwindling freshwater resources creating dire situations around the world, especially in China and India where the most stringent water reuse and discharge regulations are currently in effect." GE adds to sEawatEr solutions GE has added two new products to its Procera seawater desalination solutions — the ZeeWeed 1500 Rackless Modular System (RMS) and the ZeeWeed 1000 Next Generation Cassette (NGC) – for seawater pretreatment to reverse osmosis (RO) systems. To help improve equipment durability, GE's Procera solutions start with pretreatment components that protect membrane desalination systems by removing suspended solids and impurities. After careful analysis of an operator's source water and conservation needs, modular desalination systems are then fitted to their applications. For pressurized ultrafiltration (UF) systems, the ZW1500 RMS is a cost-effective modular system, with a 50% reduction in rack footprint according to GE. It uses the company's ZeeWeed membrane technology to pretreat water to feed RO systems. It costs 75% less than a typical rack, requires little site assembly, and its modular design simplifies installation and plant expansion said GE. The new ZW1000 NGC halves cassette costs said GE, making immersed UF for pretreatment in desalination plants even more cost-effective. The manufacturer said it provides high-quality feedwater to desalination RO trains and high-quality effluent; a 25% reduction in membrane tanks, 25% lower aeration energy; and modular building blocks for 50% fewer tank connections. "The ZW1500 RMS and the ZW1000 NGC, our newest additions to the Procera portfolio, both reduce cost and footprint. Using ZeeWeed membrane technology, they deliver high-quality desalination water treatment in a modular easy-to-install design," said general manager, engineered systems – water and process technologies for GE Power and Water, Yuvbir Singh. PEtrobas aPProvEs GE sulPhatE rEmoval mEmbranE Brazil's state-owned oil and gas company, Petrobras, has approved a new seawater sulphate removal (SWSR) nanofiltration membrane from giant US conglomerate, GE, for use in water injection enhanced oil recovery (EOR) applications. Petrobras' approval is, according to GE, particularly valuable not only to the US firm but also to the oil and gas industry because upstream companies view Petrobras as the leader in EOR and sulphate reducing unit technologies. GE said its SWSR membrane removed sulphate to reduce scale and corrosion in the injection well which limit oil recovery and plug the well. GE said its membrane had "exceptional fouling resistance due to its three-layer membrane design and smooth surface." GE claimed its membrane showed sulphate removal levels topping 99.8% – outstripping Petrobras' 95% sulphate removal threshold. Petrobras verified the technical quality and high performance of GE's SWSR membrane during a five-month pilot of assisted operation with 8-inch, 440 square feet, elements where it reached Petrobras' standard for this qualification. GE said the launch of its SWSR membrane made it the "only company to offer chemicals and membranes for the Brazilian and global SRU markets, providing operators with a single source of contact for chemicals, membranes and services." General manager with GE Power & Water, Yuvbir Singh, said the Petrobras endorsement came as the oil and gas sector was looking for "more effective technologies that can help protect production equipment as companies venture into deeper, more challenging production conditions." The new SWSR membranes are an upgrade of GE's DK series nanofiltration membrane to minimize operating pressures with higher transmission of sodium chloride into the permeate water. Also, GE claimed, it is a physical barrier to suspended particles including bacteria, pyrogens and colloids. Towering challenge: ClearFlo is "ideally suited" for complex treatments including cooling tower blowdown. oasys launchEs zEro liquid uPGradE

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