Water. desalination + reuse

SHOWCASE New produced-water treatmeNt aims to elimiNate scale Water treatment technology for treating produced water from oil sands thermal processes such as steam assisted gravity drainage (SAGD) has been introduced by Aquatech. The HEVAP™ high efficiency evaporation process preconditions the feedwater by incorporating a softening step combined with additional conditioning of the feedwater prior to treatment by the evaporators. This process provides the evaporators with essentially a scale-free environment in which to operate. "Increasingly, oil producers in Alberta are choosing to go with evaporation technology as the treatment method for reusing/ recycling their produced water in thermal SAGD process because it offers a variety of benefits including higher water recovery rates (lower make-up/reduced blow down), smaller footprint, and easier operability," said Alan R Daza, vice president of sales and business development for Aquatech's Infrastructure & Major Projects division. "However, managing scaling has been a challenge with evaporation technology. Aquatech's HEVAP evaporative process addresses this issue as it has been engineered to operate in a scalefree environment while also providing other process advantages to oil producers," he added. large fractioNal edi stack iNtroduced by Qua Aquatech division Qua® has introduced what it claims to be one of the largest electrodeionization (EDI) stacks available in the global market. The Mega line of its FEDI® Fractional Electrodeionization products is available in two versions, Mega FEDI 2 and Mega FEDI 2-HF, designed to accommodate different feedwater chemistry. Mega FEDI stacks are ideal for large-capacity, high-flow systems normally required in heavy industrial projects such as power, petrochemicals, refinery and electronics for high-purity water needs. Each stack can handle treated water flow of up to 75 GPM (17 m3/h). In addition, Mega FEDI's unique stackable design minimizes piping, reduces footprint and makes it simple and easy to The Mega FEDI from Qua install on skids. ge lauNches membraNe for tough-to-treat waters A new low-fouling reverse-osmosis (RO) desalination membrane for brackish water from industrial processes that is difficult to treat has been introduced by GE. The AG LF series resists degradation from water containing bacteria, colloids and other materials that foul and shorten membrane element life. GE successfully pilot-tested the new membranes in Asia, where customer experience showed that they required fewer cleaning cycles compared with conventional brackish membranes in tough applications, such as steel production, power plants and plating | 38 | Desalination & Water Reuse | August-September 2013 more details aNd coNtacts for items caN be fouNd oN www.desaliNatioN.biz uNder product News buttoN processes. GE says the membrane can reduce the time between cleanings by up to 50%, although actual results will vary with specific application conditions. It features a unique coating technology that improves cleaning cycles, reduces pressure and reduces friction on the surface of the membrane, making it resistant to organic fouling. ksb pressure ceNter to be showN first at ida coNgress German pump-maker KSB AG announced on 14 June 2013 that its new Salino® Pressure Center for smaller reverse-osmosis (RO) systems will go on show for the first time at the IDA Congress at Tianjin, China, KSB's Salino pressure centre (20–25 October 2013). The Salino Pressure Center consists of an axial piston pump and an axial piston motor, arranged on a common shaft. Driven by the diaphragm return flow, the axial piston motor transfers its power directly to the pump shaft. Three functions are fulfilled by one and the same unit: creating high pressure, compensating pressure losses and recovering energy. There is no need for a separate booster pump, and the entire system runs on a single electric motor and frequency inverter. By removing the need for a separate booster pump and motor, the number of components associated with other types of systems is reduced and energy savings of up to 75% are made compared with systems that do not use an integral energy-recovery device, says KSB. Because there is no fluid exchange between the brine and the feed water, energy-consuming mixing is avoided. The Salino is designed for RO systems with a capacity of up to 480 m3/d. The electric drive has a rating of 29 kW, and all components are resistant to seawater and dimensioned for low life-cycle costs. Fluctuating salt content in the seawater can be coped with using the integrated control system. In recent tests, the new compact unit desalinated 1 m3 of seawater with a salt content of 35,000 ppm at a power input of approximately 2 kW/h. sts traNsfers NaClO geNerators to joiNt veNture Severn Trent Services has transferred its ClorTec® on-site sodium hypochlorite generation product line to Severn Trent De Nora, a joint venture to provide marine and offshore disinfection with Italy's Gruppo de Nora. Effective immediately, the ClorTec line will now be managed from Severn Trent De Nora's corporate headquarters in Sugar Land, Texas. Consolidation of Severn Trent Services' electrochlorination technology under Severn Trent De Nora began with the acquisition of Chlorine Engineers' CECHLO RO, seawater and brine electrochlorination systems in July 2012. Through the transfer of the ClorTec product line, Severn Trent De Nora is now able to offer a broader portfolio of electrochlorination products across a variety of markets and customer applications.

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