Large-scale desalination typically uses extremely large amounts of energy as well as specialized, expensive infrastructure, making it very costly compared to the use of fresh water from rivers or groundwater.
HOWEVER, scientists are developing energy recovery devices for desalination. Energy Recovery, Inc’s (ERI) PX devices improve the energy efficiency of seawater reverse osmosis (SWRO) plants by up to 60 percent, making desalination a cost-effective solution for clean water supply. PX devices also reduce the carbon footprint of desalination, saving more than 700 MW of energy and reducing CO2 emissions by more than 2.3 million tons per year worldwide.
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