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SEA WATER DESALINATION (SWRO) PLANT
Optima Water Solutions designs, supplies, and commissions Sea Water Reverse Osmosis (SWRO) Desalination Plants for producing fresh drinking water and process water from seawater or brackish coastal water. We serve coastal industries, island communities, marine vessels, resorts, and Gulf region clients with high-efficiency SWRO systems that incorporate energy recovery devices to minimise power consumption.
Sea Water Desalination using Reverse Osmosis (SWRO) is the most widely deployed technology globally for converting seawater (TDS 30,000–45,000 ppm) or brackish water into fresh water (TDS below 500 ppm). High-pressure pumps (60–80 bar) force seawater through semi-permeable RO membranes, rejecting 99%+ of dissolved salts.
Modern SWRO plants we build incorporate Energy Recovery Devices (ERD) such as pressure exchangers that capture energy from the reject brine stream — reducing specific energy consumption to 2.5–3.5 kWh/m³, a 40–60% reduction over older SWRO designs.
SWRO is the primary source of fresh water for the Gulf Cooperation Council countries (Saudi Arabia, UAE, Kuwait, Qatar, Oman, Bahrain) and is increasingly deployed in India's coastal regions as groundwater depletion intensifies.
Features of Our Sea Water Desalination Plants
- Energy recovery devices — ERD pressure exchangers reduce energy cost by 40–60%
- SWRO membranes — Dow FilmTec SW30, Toray, or equivalent high-rejection membranes
- 99%+ salt rejection — consistently produces TDS below 200 ppm from seawater
- Modular design — capacity can be expanded in phases as demand grows
- Chemical dosing systems included — antiscalant, biocide, dechlorination
- Post-treatment mineralisation — remineralisation for drinking water taste
- Gulf region experience — projects supplied for UAE, Qatar, Saudi Arabia, Oman
- India coastal experience — Andaman, coastal Karnataka, Tamil Nadu, Gujarat
- ISO 9001:2015 certified design and manufacturing
Applications
- Coastal Industries & Process Water
- Island Communities & Marine Vessels
- Beach Resorts & Hospitality
- Municipal Drinking Water Supply
Our Process
- Source Water Analysis — Seawater characterisation: TDS, temperature, SDI, biofouling potential, seasonal variation, and full site survey.
- System Design — Intake design, pre-treatment train, SWRO membrane array, energy recovery, and post-treatment (remineralisation).
- Procurement & Fabrication — High-pressure pumps, SWRO membranes (Dow FilmTec, Toray, or equivalent), pressure exchangers, and controls.
- Commissioning & Certification — Full performance testing, water quality certification, operator training, and ongoing O&M support.
Get a Quote for Sea Water Desalination Plant
Free site visit & custom proposal from our engineers within 48 hours. ISO 9001:2015 certified. 158+ projects delivered across India.
Common Questions
Sea Water Desalination Plant — Frequently Asked Questions
What is the cost of a Sea Water Desalination Plant?
SWRO plant cost depends heavily on capacity. A 1 m³/hr containerised SWRO system for a resort or small island starts from ₹50–80 Lakh. A 10 m³/hr plant for an industrial facility costs ₹2–4 Crore. Large municipal projects (100+ m³/hr) can cost ₹10–50 Crore+. Contact Optima for detailed feasibility and costing based on your location.
How much electricity does a Sea Water Desalination Plant consume?
Modern SWRO plants with energy recovery devices consume 2.5–4 kWh per m³ of fresh water produced. Without ERD, older systems consumed 6–8 kWh/m³. At 3 kWh/m³ and ₹8/kWh electricity, producing 100 m³/day of fresh water costs approximately ₹2,400/day in electricity — much lower than water tanker delivery costs in most coastal areas.
Can Optima supply desalination plants for Gulf region projects?
Yes. Optima Water Solutions has experience supplying and commissioning water treatment and desalination systems for clients in UAE, Qatar, Saudi Arabia, Oman, and Bahrain. We handle international project logistics, documentation, and commissioning support. Contact us at +91 9711880791 for Gulf region project enquiries.
Is desalinated water safe for drinking?
Yes. Properly designed SWRO desalination produces water meeting WHO drinking water guidelines with TDS below 200 ppm. Post-treatment steps include remineralisation (adding calcium and magnesium), pH adjustment, and disinfection to produce water that is safe, tastes good, and meets BIS/WHO standards.
What maintenance does a Sea Water Desalination Plant require?
SWRO plants require regular pre-filter cartridge replacement (monthly), antiscalant dosing replenishment, membrane CIP cleaning (quarterly), high-pressure pump service (annual), and membrane performance monitoring. Optima provides AMC contracts with scheduled maintenance visits and emergency support.
What is the difference between SWRO and standard RO?
Standard RO treats fresh or brackish water at 15–25 bar pressure. SWRO (Sea Water Reverse Osmosis) treats seawater with TDS of 30,000–45,000 ppm, requiring much higher pressure (60–80 bar), specialised high-pressure membranes, and energy recovery devices to keep operating costs manageable.
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