What is Sea Water Reverse Osmosis (SWRO)?

Sea Water Reverse Osmosis (SWRO) is a desalination technology that uses high-pressure pumps and semi-permeable membranes to remove dissolved salts and other contaminants from seawater. It produces desalinated water that can be used for industrial, municipal, and other applications after suitable post-treatment.

How does a Sea Water Reverse Osmosis system work?

An SWRO system first treats seawater through a suitable pretreatment process to reduce suspended solids and fouling contaminants. High-pressure pumps then push the pretreated seawater through RO membranes. The membranes allow water to pass through while rejecting most dissolved salts. The process produces a freshwater permeate stream and a concentrated brine stream.

How much water can an SWRO plant produce?

The capacity of an SWRO plant can range from relatively small systems for individual industrial facilities to very large desalination plants supplying cities. The required capacity is determined by the facility's water demand, operating schedule, available seawater, and desired level of water security.

Is SWRO water suitable for industrial use?

Yes. SWRO permeate can be used for many industrial applications, but the required post-treatment depends on the application. For general process or utility water, SWRO may provide the required quality directly after appropriate conditioning. Applications such as boiler feed water, pharmaceutical water, and ultrapure water may require additional RO, EDI, or other polishing treatment.

How much does a Sea Water Reverse Osmosis plant cost?

There is no single fixed cost for an SWRO plant. The price depends on plant capacity, seawater quality, intake arrangement, pretreatment, RO configuration, energy recovery, civil works, post-treatment, automation, and brine disposal requirements. For an accurate estimate, an SWRO project should be evaluated based on site-specific water demand and seawater conditions.

Sea Water Reverse Osmosis (SWRO) for Industrial Water Supply