Safa Water Technology provides water for consumption by hotels and resorts near the Red Sea with two reverse osmosis (RO) plants. Before the retrofit, each plant had a production capacity of 500 m3/day and a high specific energy consumption of 6.3 kWh/m3. The plants had existing energy recovery devices (ERDs) with reliability issues, including turbine failures. To increase production capacity while lowering the energy requirements and costs, the company collaborated with Interwater, which helps install and operate desalination plants, to implement a retrofit.

The engineers at Interwater chose to employ Energy Recovery’s PX® Pressure Exchanger® devices. This was the critical factor in reducing energy consumption, as the PX can recycle high-pressure energy from the reject brine and circulate it back into the system with a peak efficiency of 98%. *

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