Energy Recovery Integrated SWRO | Ultra-Low Power Consumption

Product Overview

Metalsin‘s flagship Energy Recovery Integrated SWRO system represents the pinnacle of modern desalination technology, designed for industrial users who prioritize operational sustainability and cost-efficiency. By combining advanced membrane filtration with state-of-the-art energy recovery devices (ERD), this system delivers high-purity freshwater while maintaining an ultra-low specific power consumption.

A containerized seawater RO system with energy-recovery device (ERD) integrated, housed in a 40′ container, production capacity: 120 tons per day.

To meet the diverse logistical needs of global projects, our systems are engineered with a skid-mounted architecture as standard. This design integrates all core components—including the high-pressure pumps, ERD, and filtration modules—onto a single, heavy-duty structural frame. This skid-mounted approach ensures:

• Compact Footprint: Maximizes space efficiency, making it ideal for crowded engine rooms or limited coastal land.
• Plug-and-Play Installation: Pre-piped and pre-wired at the factory to minimize on-site labor and commissioning time.
• Structural Integrity: Provides a stable, vibration-dampened foundation for sensitive high-pressure equipment.

Skid-mounted SWRO with energy-recovery devices for large-scale construction sites or platforms.

For clients requiring maximum protection or rapid mobility, Metalsin offers fully containerized customization. These systems are built into standard 20ft or 40ft shipping containers, providing a turnkey, weather-proof solution that is shielded from harsh salt-spray environments. Whether deployed for large-scale coastal industrial parks, containerized island water stations, or offshore platforms, this “Green SWRO” solution dramatically reduces the carbon footprint and long-term electricity costs associated with seawater desalination.

Why Integrate Energy Recovery?

The Seawater Reverse Osmosis is traditionally an energy-intensive process because high-pressure pumps must overcome significant osmotic pressure to force water through the membranes. In conventional systems, the high-pressure concentrate (brine) is discharged, wasting the massive kinetic energy it contains.

The core energy-recovery components integrated into a SWRO system: an axial piston pump & a pressure exchanger.

Energy Recovery Integration changes this dynamic. By installing an Energy Recovery Device (ERD), such as an axial piston pump or a pressure exchanger, the system captures the pressure from the brine stream and transfers it directly to the incoming seawater feed. This means the main high-pressure pump only needs to provide a fraction of the total required energy. Integrating an ERD can reduce electricity consumption by 40% to 60%, transforming the economic viability of large-scale water production in remote or energy-scarce locations.

System Process Workflow with ERD

The energy recovery integrated SWRO system begins with a comprehensive pre-treatment stage, where raw seawater is drawn in by a feed pump and conditioned through a dual chemical dosing process followed by a multi-media filter to remove suspended solids and large impurities. The water is then further refined by a precision filter, ensuring the removal of fine particles and protecting the downstream RO membranes from fouling and damage. This multi-stage filtration process is essential for maintaining system stability and extending membrane lifespan.

The process flow chart for a SWRO system integrated with energy-recovery devices.

The core of the system lies in its energy-efficient desalination process, where a high-pressure pump works in tandem with an energy recovery device. As seawater is pressurized and delivered to the RO membranes, the device simultaneously captures the residual pressure energy from the concentrated brine stream and transfers it back to the incoming feed water, significantly reducing overall energy consumption. The pressurized feed then enters the RO system, where it is separated into high-quality product water and brine, while an integrated CIP (clean-in-place) system ensures consistent performance and long-term reliability through periodic membrane cleaning.

Technical Specifications & Performance Indicators

Primary Applications of ERD-Integrated SWRO Systems

The integration of Energy Recovery Devices (ERD) transforms SWRO from a high-cost utility into a sustainable freshwater source. Systems featuring ultra-low specific power consumption are specifically prioritized in sectors where electricity is either expensive, limited, or provided by off-grid sources.

• Large-Scale Municipal & Industrial Desalination: For facilities with capacities exceeding 1,000 TPD, even a fractional reduction in kWh/m³ results in massive annual operational savings. These systems are ideal for providing process water to coastal power plants and refineries.
• Off-Grid Island Communities: In locations where power is generated via diesel or solar arrays, every kilowatt saved directly reduces fuel logistics and costs. Metalsin’s energy-efficient units ensure a reliable potable water supply for permanent island residents.
• Containerized Mobile Water Stations: The efficiency of ERD-integrated systems makes them perfect for plug-and-play containerized units used in emergency relief, military outposts, or temporary construction sites where energy infrastructure is minimal.
• Offshore Energy & Mining Platforms: For oil rigs and remote mining operations, the reduced mechanical load on the system—thanks to the ERD—minimizes downtime and maintenance frequency, providing a steady stream of high-purity water for both industrial processes and crew life support.
• Sustainability-Driven Luxury Resorts: Eco-conscious hospitality brands utilize these systems to meet “Green Resort” certifications by lowering the carbon footprint of their desalination operations while maintaining high-volume water production for pools and amenities.

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