Reverse osmosis membrane technology

Sectors
Objective
Opportunities enabled
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Country
Japan
Maturity

Membrane which permeates solvent (water) but does not permeate solute (salt). In desalination, pressure up to 10MPa is applied to seawater which enables water to pass through the revere osmosis membrane, while the salt is excluded.

Currently, two types of material are used: bridged aromatic polyamides, and cellulose acetate. Membranes must withstand high pressure and also be resistant to fouling.

Organisation providing the technology
Japan Chemical Industry Association
Benefits

Desalination using reverse osmosis membrane results in drastic reduction (over 80%) of energy consumption compared with evaporation method, since no heating is required.

Co-benefits

Reduction of atmospheric and other pollutants associated with reduction of fuel consumption is anticipated.

Differentiators

Large scale desalination plants can process up to 500,000m3/day, while consuming less than 3 to 5kWh/m3 of electricity.

Succes factors and requirements

System consists of water intake, pre-treatment, RO desalination, post-treatment.
Proper pre-treatment is a key.

Investments required

Water Production Cost: 0.7 to 2.0 USD/m3

Timeframe

20 to 30 Months for EPC.

Countries where implemented
Algeria
Contact

Japan Chemical Industry Association (https://www.nikkakyo.org/)

Technical Affairs Department (tel: +81-3-3297-2578)

Further information

Please see relevant page of the publication "Life Cycle Analysis of Chemical Products in Japan and around the world" (https://www.nikkakyo.org/content/life-cycle-analysis-chemical-products-…)