Hydrautics ESPA (Energy Saving Polyamide)

Combining energy efficiency with high rejection

The energy required to pressurize RO feed water is the largest contributor to the total energy consumption of the RO plant. ESPA membranes are the choice for applications demanding high-energy efficiency, with uncompromised productivity and salt rejection. Operating at significantly lower pressures, ESPA elements produce high quality water in a range of water treatment applications, ensuring energy cost savings.

ESPA membranes are used in the treatment of drinking water, industrial process waters, municipal and industrial waste water recovery and reuse because of this exception performance capability. These membranes also serve as part of polishing units in seawater desalination plants when boron rejection is critical.

• ESPA1: ESPA1 is commonly used to produce potable water from low TDS feed waters.
• ESPA2: ESPA2 membranes provide optimum salt rejection and permeate flows. They are chosen when lower permeate TDS and lower feed pressures are needed. ESPA2 membranes offer highest energy efficiency at lowest costs and are used in large municipal wastewater reclamation plants.
• ESPAB: ESPAB are low pressure brackish water membranes having a high rejection for boron.
• ESPA4: ESPA4 are the lowest feed pressure membranes offering low energy consumption. ESPA4 membranes require ultra-low pressure without compromising high salt rejection and are commonly used in the second pass of a reverse osmosis system.