Desalination Plants
Kartavya Desk Staff
Source: IE
Subject: Science and Technology
Context: Recent military strikes in the escalating US–Israel–Iran conflict in West Asia have targeted desalination plants, raising concerns over water security and humanitarian crises in the region.
About Desalination Plants:
What it is?
• A desalination plant is a facility that converts saline seawater or brackish water into potable freshwater by removing dissolved salts and minerals.
• The most common technology used is Reverse Osmosis (RO), where high pressure pushes seawater through semi-permeable membranes to separate salt from water.
Where they are located:
Desalination plants are primarily concentrated in arid and water-scarce coastal regions, especially:
• West Asia / Gulf Region – Saudi Arabia, UAE, Kuwait, Qatar, Oman, Bahrain
• North Africa – Libya, Algeria
• Other regions – Israel, Spain, Australia, United States, and China
West Asia alone accounts for nearly 70% of global desalination capacity, making it the global hub of desalinated water production.
The primary objectives of desalination plants are:
• Ensure freshwater supply in regions with scarce natural water resources.
• Support urban populations and industrial development in arid coastal countries.
• Provide water security during droughts and climate variability.
• Reduce dependence on groundwater and rivers in water-stressed regions.
Key Features:
• Reverse Osmosis Technology – Uses semi-permeable membranes to remove salts and impurities from seawater.
• Energy Intensive Process – Requires significant electricity, often integrated with thermal or gas-based power plants.
• Large-scale Infrastructure – Many plants are co-located with power plants to share energy and reduce costs.
• Brine Discharge – Produces concentrated saltwater (brine) that is typically released back into the ocean.
• Growing Global Sector – Over 21,000 desalination plants operate worldwide, with capacity growing 6–12% annually.
Significance:
• Provides drinking water where natural freshwater sources are scarce.
• In Gulf countries, desalination supplies 40–90% of drinking water, making it critical for survival.
• Supports megacities and industrial zones in desert regions.