Your Professional Seawater Reverse Osmosis Supplier
ROCKERHILL is established in China from 2011 originally, with 15 years of development and improvement, today ROCKERHILL has formed the core businesses in design and engineering, manufacturing and modularization, contracting and services in water conservation and water treatment industry.With a manufacturing hub of 17,000 square meters in JiangSu China, and more than 30 professional technical staffs, and 20 professional senior engineers and national registration engineers, we provide sustainable values and services to our domestic and international customers by utilizing our extensive experiences and integrated competitiveness in design and engineering, technical package, procurement services and project contracting.
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![Sea Water Reverse Osmosis]()
Sea Water Reverse OsmosisSWRO is a containerized RO (reverse osmosis) systems, available for both indoor and outdoor use. All the desalination components are pre-assembled in 1 to 2 containers, including the piping and control systems, which considerably...view more -
![Containerized RO Plant]()
Containerized RO PlantROCKERHILL Containerized RO plant is a self-contained, turnkey system that can function on-the-go or as a permanent water treatment plant. So, it able to start pumping high-quality product in less than a day after arrival on-site....view more -
![Desalination Reverse Osmosis]()
Desalination Reverse OsmosisDesalination is the process of removing salt and other impurities from seawater or brackish water to produce fresh, potable water. Reverse Osmosis (RO) is the most widely used desalination technology due to its efficiency and scalability.view more -
![Solar Reverse Osmosis]()
Solar Reverse OsmosisSolar Energy Harvesting: High-efficiency PV panels generate DC power (1–50 kW), eliminating diesel/grid dependency.view more
Intelligent Power Management: Auto-switches between solar, batteries, or grid for non-stop operation....
Reverse osmosis is a widely utilised membrane technology for seawater desalination. The basic concept of Sea Water Reverse Osmosis (SWRO) is to utilise a semi-permeable membrane where most of the dissolved species are rejected while water permeates it. Normally, water spontaneously diffuses through a semi-permeable membrane from a dilute solution to a concentrated solution. However, the reverse process is realised by applying external pressure enough to overcome the osmotic pressure on seawater. This phenomenon is the basis of seawater desalination and water treatment by RO.
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Technical Data |
Unit |
C50 |
C120 |
C250E |
C350E |
C500E |
C1000E |
|
Rated Product Flow 1) |
m3 /h |
2.3 |
5.5 |
11.4 |
16.4 |
23 |
45.5 |
|
Rated Recovery Rate 1) |
% |
35 |
40 |
45 |
45 |
45 |
45 |
|
Container Size |
ft |
20 |
20 |
40 |
40 |
40 |
40+40 |
|
Energy Consumption 3 |
kWh/M3 |
5.93 |
5.21 |
2.73 |
2.7 |
2.64 |
2.58 |
|
Installed Power 4) |
kW |
18.7 |
37 |
50.5 |
61 |
86.5 |
173.5 |
Advantages of Seawater Reverse Osmosis
Reliable Source of Freshwater
One of the greatest advantages of SWRO is the assurance of constant water supply, especially in arid regions and coastal communities. By tapping into the abundant seawater reserves, nations are no longer solely dependent on rainfall or freshwater bodies.
High Water Quality Output
SWRO systems can produce ultra-pure water with total dissolved solids (TDS) below 500 ppm, meeting WHO and EPA standards for drinking water. It efficiently removes salts, bacteria, viruses, and harmful organic compounds, ensuring safe water for human consumption and industrial processes.
Modular and Scalable Technology
SWRO plants can be customized to meet varying capacity demands, ranging from small mobile systems for ships and military use to large-scale municipal desalination plants. This modular scalability makes it feasible for different use cases and budgets.
Continuous Technological Advancements
With ongoing innovations in membrane material, energy recovery devices (ERDs), and pretreatment technologies, the SWRO process is becoming more energy-efficient and cost-effective. Recent developments have significantly improved membrane durability, fouling resistance, and overall system performance.
Reduced Footprint Compared to Thermal Methods
Compared to thermal desalination techniques like Multi-Stage Flash (MSF) or Multi-Effect Distillation (MED), SWRO consumes less space and energy, making it suitable for urban environments and remote facilities with limited infrastructure.
Flexibility in System Integration
SWRO units can be integrated with renewable energy systems such as solar and wind, contributing to sustainable desalination practices and lowering carbon footprints. Hybrid installations are now being adopted to enhance resilience and cost savings.
Applications of Seawater Reverse Osmosis
Municipal Water Supply
Urban centers in water-scarce regions rely on SWRO plants to meet residential needs.
01
Oil and Gas
Offshore drilling platforms use compact SWRO systems for freshwater production.
02
Hospitality and Resorts
Coastal hotels and islands deploy SWRO systems for self-sustained water production.
03
Pharmaceutical and Electronics
Industries requiring ultra-pure water benefit from high-rejection SWRO membranes.
04
Military and Emergency Relief
Portable SWRO units are used for rapid response in disaster-struck areas and military bases.
05
Intake System
Draws sea water from the ocean and uses screens and filters to remove large debris.
Pre-Treatment Unit
Filters out particles and organic matter using sand and activated carbon filters.
High-Pressure Pump
Creates the pressure needed to push the sea water through the RO membranes.
Reverse Osmosis Membranes
The core of the process, these membranes let water through but block salts and contaminants.
Post-Treatment Unit
Further filters and treats the water to ensure it meets quality standards.
Brine Disposal System
Manages and disposes of the salty waste (brine) in an environmentally safe way.
Control and Monitoring System
Keeps track of the plant’s performance and ensures everything is working properly.
How it works of Seawater Reverse Osmosis
Pre-Treatment
The sea water is first filtered to remove larger particles and sediments. This protects the delicate RO membranes that will be used later.
Reverse Osmosis
The water then passes through a special membrane that removes salt and other impurities.
Disinfection
The purified water is disinfected to kill any remaining microorganisms.
Distribution
The clean water is then ready to be used for drinking, irrigation, or industrial purposes.
The Process of Seawater Reverse Osmosis
Pretreatment
Pretreatment is an important first step in the seawater reverse osmosis process to protect the RO membranes from fouling. It typically involves removing suspended solids, adjusting pH, and adding scale inhibitor. Pretreatment can include sustainable flocculation, media filtration, microfiltration or ultrafiltration membranes.
Reverse Osmosis Membrane Separation
In the RO membrane separation stage, pretreated seawater is pumped at high pressure through semi-permeable membranes. The membranes allow water to pass through but reject salts and other dissolved solids. Typical seawater RO systems use 8″ diameter spiral wound membrane elements housed in fiberglass pressure vessels.
Post-treatment
After the RO process, the permeate water is very low in dissolved solids. Post-treatment typically includes pH adjustment and disinfection before distribution. Remineralization may also be done to add calcium and magnesium back into the water for taste and health benefits.
Brine Disposal
The concentrated brine from the RO process must be properly disposed of to avoid environmental impacts. Common disposal methods include surface water discharge, deep well injection, evaporation ponds, and mixing with wastewater treatment plant effluent before ocean discharge. Brine disposal is a key consideration in the overall design of a seawater RO system.
FAQ
We're professional seawater reverse osmosis manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy high-grade seawater reverse osmosis at competitive price from our factory.
