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Home > By DEPARTMENTS > Green Operations > Standard Operating Procedures for Green and Sustainable Business Operations > Energy Efficient Operations

Energy Recovery Pump Captures Energy in Desalination

Energy Recovery Pump That Captures and Recycles Energy

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State-of-the-art desalination plants suck in seawater and then use electricity-driven pumps to put it under pressure. This salty stream is then slammed against filters designed to let the fresh water bleed through while sequestering the high-pressure brine - a process called reverse osmosis.

The Market Projections for Desalination of Seawater

Expectations are growing that demand for desalination plants will rise as coastal populations turn to the oceans for fresh water supplies. As Energy Recovery, a San Leandro company, told potential investors in its prospectus, "growth in the market for new total desalination capacity should increase by approximately 13 percent per year from 2005 to 2015."

Energy Recovery Pump That Captures and Recycles Energy

The company designed a pump to capture the pressure trapped in left-behind brine and recycle its energy into repressurizing the next batch of seawater entering the reverse-osmotic filters.

Energy Recovery Chief Technology Officer Richard Stover said their energy-saving pump is a tiny but pivotal component in what are huge desalination plants. Energy Recovery has designed its pump to capture the pressure trapped in that left-behind brine and recycle its energy into repressurizing the next batch of virgin seawater destined to be slammed against those reverse-osmotic filters.

Desalination is Still a Political Issue

Amy Zander, a professor of environmental engineering at Clarkson University in New York and chairwoman of a recent National Research Council report on saltwater desalination, said tapping the coast for drinking water is likely to be as tough a choice for California as the parallel issue of offshore drilling for oil. Once again...the US seems to be lagging in adopting energy saving technologies -- Energy Recovery isn't betting that California will open the floodgates for desalination. Its prospectus tells investors, "We expect sales outside the United States to remain a significant portion of our revenue for the foreseeable future."

Energy Recovery
Corporate Headquarters, North America
1908 Doolittle Dr
San Leandro, CA 94577
Phone: +1 (510) 483-7370

Edited by Carolyn Allen, owner/editor of California Green Solutions
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