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Archives :: Chementator :: Desalination

Displaying 1 - 12 of 12 stories.
April 1, 2013
A new way to desalt water without using RO or distillation
Capacitive desalination, in which salt ions are electrically removed from saltwater, has been researched for decades as a potentially cheaper alternative to energy-intensive reverse osmosis (RO) and distillation, but so far its application has been limited to waters with very low salt concentrations. A new method, which may change that, is being developed by researchers at Lawrence Livermore National...
http://www.che.com/chementator/desalination/A-new-way-to-desalt-water-without-using-RO-or-distillation_10372.html
September 1, 2012
This new pump system improves efficiency for desalination operations
A new hydraulically driven, positive-displacement-pump system can lower the energy requirements for pumping water by 10% in large seawater reverse osmosis (SWRO) desalination plants, where electricity typically represents the largest cost. Recently launched by GE Water & Power (www.ge-energy.com) at the 2012 International Water Week in Singapore, the IPER (integrated pump and energy recovery)...
http://www.che.com/chementator/desalination/This-new-pump-system-improves-efficiency-for-desalination-operations_9636.html
July 1, 2012
Making artificial water channels
A group of scientists from Fudan University (Shanghai, China; www.fudan.ac.cn) China, has reported what it claims to be the first example of artificial single-molecular water channels that can transport water across lipid membranes. Transmembrane water transport — through water channel proteins called aquaporins — is of crucial importance in living organisms because it regulates the osmotic...
http://www.che.com/chementator/desalination/Making-artificial-water-channels_9449.html
April 1, 2012
This water-treatment system can aid disposal options for brine
A six-stage water treatment process involving electrocoagulation (EC) and multi-stage flash (MSF) distillation could improve options for the disposal of sludge and brine in applications that include the treatment of water from hydraulic fracturing of oil and gas wells (see also Frac Water Reuse, Chem. Eng., February, pp.14–16), as well as desalination. The first small-scale demonstration of the...
http://www.che.com/chementator/desalination/This-water-treatment-system-can-aid-disposal-options-for-brine_9175.html
March 1, 2012
Composites that can enhance forward osmosis
Researchers from the Dept. of Chemical Engineering, Monash University (Clayton, Victoria, Australia; www.monash.edu), have reported on a new composite polymer hydrogel with light-absorbing particles incorporated within it, that can be used as draw agents in the forward osmosis (FO) process of desalination. The researchers, led by professor Huanting Wang, aimed to develop new...
http://www.che.com/chementator/desalination/Composites-that-can-enhance-forward-osmosis_9023.html
August 1, 2011
A step forward for an energy-saving desalination process
An alternative desalination process that reduces energy consumption by over 50% compared to best available technology (BAT) has been successfully piloted by the Industry Sector of Siemens AG (Munich, Germany; www.siemens.com), in collaboration with Singapores national water agency, PUB, and Singapores Environment and Water Industry Program (EWI). Results of the Siemens demonstration unit, which has been...
http://www.che.com/chementator/desalination/A-step-forward-for-an-energy-saving-desalination-process_8275.html
August 1, 2011
Green honors
In June, the U.S. Environmental Protection Agency (EPA; Washington, D.C.; www.epa.gov) announced the winners of the 2011 Presidential Green Chemistry Challenge Awards. Winners of the Challenge, which promotes R&D of less hazardous alternatives to existing technologies that reduce or eliminate waste in industrial production, are selected by an independent panel convened by the Americal Chemical Soc...
http://www.che.com/chementator/desalination/Green-honors_8278.html
August 1, 2011
A promising new forward-osmosis membrane
Forward osmosis (FO) has been recognized as a valuable technology for many applications including wastewater reclamation, seawater desalination, and energy production, due to the low energy input required. The osmotic pressure gradient across a semipermeable FO membrane causes water to diffuse naturally through the membrane, leaving impurities behind. However, when water diffuses through the selective...
http://www.che.com/chementator/desalination/A-promising-new-forward-osmosis-membrane_8282.html
May 1, 2011
CNT-enhanced membranes show promise for desalination method
By immobilizing carbon nanotubes (CNTs) within polymer membrane pores, scientists at the New Jersey Institute of Technology (NJIT; Newark, N.J.; www.njit.edu) were able to significantly improve the efficiency of desalination via a membrane distillation process. Somenath Mitra and colleagues at NJIT used a vacuum to force a dispersion of CNTs into the pore network of commercially available polymer...
http://www.che.com/chementator/desalination/CNT-enhanced-membranes-show-promise-for-desalination-method_7928.html
May 1, 2011
Desalination without pressure or membranes
After a nine-month field demonstration at BTX, Inc.’s Sleepy well site in Indiana, Pa., Altela Inc.’s (Albuquerque, N.M.; www.altelainc.com) AltelaRain 4000 water desalination system has been shown to turn Marcellus Shale wastewater into distilled water. The demonstration, funded by the U.S. Dept. Of Energy’s National Energy Technology Laboratory (NETL; Pittsburgh, Pa.; www.netl.doe.gov)...
http://www.che.com/chementator/desalination/Desalination-without-pressure-or-membranes_7936.html
March 1, 2011
Graphene improves the performance of water deionization
A research team from the University of South Australia (Adelaide; www.unisa.edu.au) and the East China Normal University (Shanghai; www.ecnu.edu.cn) has developed a capacitive deionization technology (CDI) that uses graphene-like nanoflakes as electrodes, instead of conventionally used activated carbon (AC) materials. The team claims that the graphene-based electrodes offer better performance than...
http://www.che.com/chementator/desalination/Graphene-improves-the-performance-of-water-deionization_6425.html
March 1, 2011
Zero-liquid-discharge desalination system offers brine disposal alternative
A desalination system developed by Watervap LLC (Marble Hill, Ga.; www.h2ovap.com) separates saltwater of any concentration into highly purified water and dry solid minerals with high efficiency. The company’s Zero Liquid Discharge (ZLD) process represents a low-cost alternative to brine waste disposal in oil and natural gas production, as well as other industries, such as processed meats and mining...
http://www.che.com/chementator/desalination/Zero-liquid-discharge-desalination-system-offers-brine-disposal-alternative_6426.html

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