Costs of sea water desalination are going down
With Memstill, it is possible to desalinate a cubic meter of drinking water for 0.50 Euro cents from seawater.
Less water is always the best option.
But in case of a shortage of fresh water, nowadays the preparation of drinking water from seawater is a great alternative.
And the costs of sea water desalination are going down.
Thermal desalination has been overtaken by reverse osmosis and that led to some major changes:
- the proces is much cheaper
- the energy consumption during the proces has decreased sharply
An overview of new technology that can meet the demands for clean drinking water
- With electrodialysis, it is possible to desalinate a part of the seawater. An after-treatment with a reverse osmosis system can be done with much lower pressure.
And it is possible toe remove the sulphate during the proces, to prevent the membranes against pollution - A step further is the application of reverse electrodialysis. Then we transport the salt ions through the membrane instead of the water itself. The first Dutch pilot plant has recently been commissioned.
- It should be possible to desalinate sea water by bringing it into contact with fresh water streams like the effluent of treated wastewater.
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The MemPower does not only drinking water but also electricity.
The MemPower does not only drinking water but also electricity. This combination has recently praised the Forum in Saudi Arabia.
Start-ups with new innovative desalination technologies
Salt Tech
Salt Tech – brings DyVaR distillation evaporator technology on the market for salt water streams that are difficult to treat with reverse osmosis. The first drinking water system has been built in Memtone, Texas.
High Voltage Water
High Voltage Water has developed a special electro-statical nozzle that sprays seawater much finer. The technology increases the efficiency of distillation evaporators. The first pilot plant is being built.
Elemental Water Makers
Elemental Water Makers has found a way to cope with fluctuations in solar energy for a constant process of reverse osmosis. The first plant supplies the Virgin Islands in the Caribbean Sea with fresh water.
Solteq
Solteq has found a way to convert wind energy directly into pressure for the reverse osmosis process. The first plant is under construction in the Colombian island Johnny Cay in the Caribbean Sea.
Aquaver
Aquaver brings the vacuum membrane distillation technology to market and builds the first plant in the Maldives in the Indian Ocean.
BiAqua
BiAqua has been specializing in preventing fouling of reverse osmosis membranes by removing sulphate.
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- Shell collaborates to produce water in Quatar desert
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Fresh water technologies (dossier)
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The average Briton uses 150 litres of water a day; the average American gets through 570 litres of the stuff. The world is getting thirstier and the global demand for fresh water is rising by 640bn litres a year.
Population growth is one factor, not only the need for drinking water and sanitation but also the need to produce more food. Agriculture accounts for 70% of water use.
While reducing consumption is one way of helping to address the water crisis on an individual level, it is far from the complete solution.
It seems desalination is the only way to get fresh water on a larger scale.