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Solar desalination or salt recovery may be recovered using free sunshine but that is where free ends. As in any water recovery project the cost of traditional equipment for the processing commercial quantities of clean water and the cost per gallon of water produced is competitive and the technology is proven and works well is situations where environmental concerns are minimal. BOTH ZERO LIQUID DISCHARGE AND REJECT BRINE DISPOSAL COSTS WILL HAVE GREATER IMPACT THAN ENERGY PURIFICATION COSTS IN THE DESALINIZATION OF SEAWATER OR WASTEWATER Zero Liquid Discharge is not free and costs are best controlled by combining the Vapco vapor compression system for first phase desalination/concentration and SunDragon Zero Liquid Discharge Salt Factories for salt and constituent recovery. The current practice of discharging reject brine to the sea is being disputed and challenged by many environmentalists. They claim that reject brine is harmful to the environment and marine life. It is only a matter of time before the environmentalist win. Ocean disposal of reject brine is also under heightened
scrutiny by governments world wide as evidenced by mounting fees
and fines. Many plants currently discharging to coastal waters
are being threatened with closure. At fifteen cent cost per cue of electricity, Vapco vapor compression produces distilled water at .006 cents per gallon. If your electric cost is seven and one half cents per kWh, the cost per gallon of distilled water is .003 cents per gallon. The cost of brine disposal without zero liquid discharge may be higher than the cost of the purified water. For example, the Vapco system rejects 120,000 gallons of 210F brine per million gallons of treated seawater, based on 35,000 ppm. The hotter the reject brine, the more efficient the salt or constituent recovery. SunDragons utilize solar power or waste heat for the recovery of dissolved solids. Hot brine allows the SunDragon evaporation to proceed in a more cost efficient manner. A SunDragon requires a reject brine with a minimum 300,000TDS for cost efficient Zero Liquid Discharge. Solids recovered are disposed of as solid waste or may be of additional value. A major advantage of a SunDragon is Zero Liquid Discharge producing solid waste for disposal, needs no discharge permitting, monitoring, compliance cost and time. The resulting near-dry salt bulk density is about 40 lbs/ cu.ft. That represents about 7,300 cu. ft. of salt/million gallons for disposal, or about the volume of 54,700 US gallons of water. |
The cleanest water and the greenest discharge solution!
For more information email sundragonsaltfactory@yahoo.com Phone 561 271 8131 |
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Salt and contaminate recovery of value added, industrial waste and hazardous contaminates. Salinity management True zero brine discharge system Desalination concentrate disposal Optimum water recovery increased with decreased disposal cost State-of-the-art in brine disposal Solar desalination greywater treatment zero brine discharge system Brackish well water desalination and demineralization Active solar powered desalination demineralization with salt and contaminate recovery Regulatory limits are becoming progressively strict on the limits of aqueous discharge and wastewater treatment. Clean Tech and Green Tech Solar Water Desalination and Demineralization |
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For more information email sundragonsaltfactory@yahoo.com
Phone 561 577 7202
copyright 2010
