HIGH PRESSURE SPRAY EVAPORATION IN LOW VAPOR PRESSURE ENVIRONMENT ENABLES TREMENDOUS SAVINGS IN CONSTRUCTION AND OPERATION EXPENSE
http://ezekielproject.org/desal_estimate.shtml

Spray Distillation Process Enables Ezekiel's Water Project Desalination Plan

Henry Lloyd, President and CEO of AquaSonics International, Inc. says they have done it. Their Rapid Spray Distillationİ ( RSDİ) process desalinates water at a fraction of the cost of current methods. RSDİ is based on the principle that saline water is ejected at high velocities in a patented process. Rapid evaporation occurs and is condensed into drinking water. Dissolved salts precipitate as a solid phase and are removed. This single stage process reduces disposal costs and provides raw materials."

The RSDİ technology achieves in one step what current reverse osmosis and multi-stage flash requires multiple steps to accomplish, and is three times more efficient in processing sea-water. The thermodynamics and aqueous chemistry of the process is extremely straightforward. Bench testing shows 95% efficiency in recovery of fresh water and separation of salts in a single stage versus 36% efficiency for other processes.

Because of the simplicity of the process construction costs are estimated to be at least half of present multi-stage flash and reverse osmosis systems. Operating costs are a fraction of traditional technologies because of the high efficiency of RSDİ.Operating and maintenance costs are also a fraction of traditional methods because of the almost complete absence of moving parts. Aquasonics believes that three times the volume of fresh water can be generated with for the same cost as traditional methods.. The projected impact on total costs would be to reduce the overall expenditure for RSDİ desalinated water to one-quarter the cost of current methods, making fresh water available where it is now scarce.
http://www.waterbank.com/Aquasonics WaterTech Article.htm
http://aquasonics.com/tech.html

Thermal Distillation

IDE is internationally recognized as a pioneer and leader in the delivery of Thermal Distillation plants. IDE's Low Temperature Thermal Distillation units are available in two versions, energy supplied either by a unique electrically driven mechanical compressor - Mechanical Vapor Compression (MVC), or by low pressure steam - Multi Effect Distillation (MED). These systems are capable of producing boiler feed water from sea water in a single step.
http://www.ide-tech.com/inr.asp?id=1570&sid=1575&pid=1575

The unique seawater distillation facility features a new Technology This facility is a mere 30 ft. in height by 120 ft. in diameter, housed in a concrete shell, yet is large enough to produce 20+ Acre Feet (6.5million gallons) of pure distilled water a day. The 94% efficiency centrifugal compressor is unknown to previously designed desalination plants. The double fluted vertical evaporator/condenser titanium tubing is 2 to 3 times more efficient than those currently available today. This efficient potable water process produces levels of purity (1 to 500 ppm tds), the highest quality of water in the world. The pure water product is produced with a minimum amount of spent energy.
http://www.waterdesalination.com/

Latest technology for reverse osmosis desalination is an alternative approach for Ezekiel's Water Project desalination process.
http://www.grahamtek.com/