Desalination of Water and Sea-Water
Know something about (RO ER)? For every gallon of pure water made from the sea by RO there is a gallon of waste concentrated seawater called brine. This brine contains energy in the form of pressure. Basic RO systems do not recover this pressure energy. This is only viable for very small systems.Traditional ER involves running the high pressure brine backwards through a pump and taking energy out via the pump shaft. This is using the pump as a reaction turbine. Slightly more efficient is to flow the brine through an impulse turbine also known as a pelton wheel.
The most efficient method is to recover the pressure energy directly in a work or pressure exchanger. Want to know more about work exchangers applied to RO? Review the disclosure for US Patent number 5,306,428
For more details on the processes, materials, energy consumption and more check here. You will find information on the selection of desalination processes, useful rules of thumb and other information.
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