Seawater Desalination Equipment | JNDTECH SWRO 1–50 TPH

Product Description

Seawater Desalination Equipment — Produce Drinking Water from the Ocean

JNDTECH seawater desalination equipment converts high-salinity seawater (up to 45,000 ppm TDS) into safe potable and process water through a high-pressure reverse osmosis (SWRO) process. Built around a multi-stage RO membrane rack, a 55–70 bar high-pressure pump and an energy recovery device (ERD), it delivers reliable fresh water for islands, vessels, coastal resorts, offshore platforms and remote military or mining sites where no freshwater source exists.

Key Features

• High-pressure SWRO membrane train — seawater-grade anti-fouling RO membranes rated for 55–70 bar feed, rejecting salt, bacteria and heavy metals in one pass.
• Energy recovery device (ERD) — recovers up to 95% of the pressure energy from the brine stream, cutting energy use by 30–60% versus systems without recovery.
• ≥99.5% salt rejection — output TDS typically below 500 ppm, meeting WHO and bottled-water potability limits.
• Containerized / skid-mounted options — plug-and-run 20 ft / 40 ft container units for rapid deployment, or compact skids for fixed coastal plants.
• Full pretreatment — multimedia filter, cartridge filter and antiscalant dosing protect the membranes from suspended solids and scaling.
• Automatic PLC control — conductivity monitoring, automatic flush, low-pressure protection and remote alarm keep operation unattended.
• Corrosion-resistant construction — duplex stainless steel and FRP pressure vessels rated for marine and coastal environments.
• Modular capacity — single units from 1 TPH; parallel trains scale to 50+ TPH or hundreds of m³/day.
• Post-treatment ready — optional remineralization and UV/O₃ sterilization for palatable, stable drinking water.
• Turnkey JNDTECH delivery — piping, electrical, commissioning and operator training supplied as one package.

Technical Parameters

Model	Capacity	Feed TDS	Salt Rejection	Operating Pressure	Power
JND-SWRO-1T	1 TPH (~24 m³/day)	≤45,000 ppm	≥99.5%	55–65 bar	~4.5 kW
JND-SWRO-5T	5 TPH (~120 m³/day)	≤45,000 ppm	≥99.5%	58–68 bar	~18 kW
JND-SWRO-10T	10 TPH (~240 m³/day)	≤45,000 ppm	≥99.5%	60–70 bar	~35 kW
JND-SWRO-50T	50 TPH (~1200 m³/day)	≤45,000 ppm	≥99.5%	60–70 bar	~150 kW

Note: figures are typical for seawater RO with energy recovery. Confirm against your unit's nameplate before publishing.

How It Works — High-Pressure Reverse Osmosis

Seawater is first pretreated (sand/multimedia filtration + cartridge filter + antiscalant) to remove particles and prevent scaling. A high-pressure pump then pushes the water to 55–70 bar against the SWRO membranes. Pure water passes through the membrane; concentrated brine is rejected. The energy recovery device captures pressure from the brine and feeds it back to the feed, slashing power consumption. Finally, post-treatment (remineralization + UV/O₃) adjusts taste and safety before storage.

Applications

• Islands and remote coastal communities without freshwater
• Ships, ferries and offshore platforms (marine SWRO)
• Resorts, hotels and coastal factories
• Military, mining and disaster-relief mobile water supply
• Bottled-water plants located at the seaside

Seawater RO vs. Standard (Brackish) RO

A common question: can a normal RO unit desalinate seawater? No. Standard brackish-water RO (used in our Pure Water Treatment Equipment) runs at 8–15 bar and cannot overcome seawater osmotic pressure. Seawater desalination needs 55–70 bar pumps, seawater-grade membranes and energy recovery — a different machine class. Choose SWRO when feed TDS exceeds ~10,000 ppm; choose brackish RO below that.

Why Choose JNDTECH

JNDTECH (Shenzhen) has delivered water-treatment and bottling lines to 125+ countries since 2008. Our seawater desalination units are engineered for harsh marine duty, backed by a 17-year track record in turnkey water and beverage plants. Every system ships with piping diagrams, commissioning and operator training so your site produces water from day one.

Related Products

• Complete Water Bottling Plant (Turnkey Guide)
• Pure Water Treatment Equipment (brackish RO) — for low-TDS sources
• Water Bottle Blow Molding Machine
• Pure / Mineral Water Bottle Filling Machine

FAQ

Q1: How salty can the feed water be?

Our SWRO units are designed for seawater up to ~45,000 ppm TDS (typical ocean water). Higher concentrations need custom design — contact us with your source analysis.

Q2: What is the energy recovery device and why does it matter?

ERD reclaims pressure from the brine discharge and reuses it to pressurize incoming feed, cutting total energy use 30–60%. It is essential for economical seawater desalination.

Q3: Is it containerized or fixed?

Both. We supply 20 ft / 40 ft containerized plug-and-run units for mobile or remote use, and skid-mounted fixed plants for permanent coastal installations.

Q4: What pretreatment is required?

Standard: multimedia/sand filtration, cartridge filtration and antiscalant dosing. Very turbid or algal water may need additional clarification — we specify based on your water report.

Q5: How is the output made drinkable?

After RO, optional remineralization restores healthy minerals and UV/O₃ sterilization ensures microbiological safety, giving stable, palatable drinking water.