Dual-Stage Containerized RO System for High TDS Water Treatment

Dual-Stage Containerized RO System for High TDS and Critical Water Purification
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Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification

Dual-Stage Containerized RO System for High TDS and Critical Water Purification

The STARK Dual-Stage Containerized RO System is specifically engineered to treat high-salinity or challenging feedwater sources where single-pass reverse osmosis is insufficient. Housed in a compact ISO container, the system integrates two stages of membrane filtration for deeper rejection performance, improved product water quality, and greater recovery efficiency. This unit is ideal for industrial sites, brackish groundwater zones, and export projects with strict outlet water requirements. With modular design, automated CIP, and integrated PLC control, it enables robust performance in remote or demanding operational environments.
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Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification
Dual-Stage Containerized RO System for High TDS and Critical Water Purification
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Product Description

The Dual-Stage Containerized RO System is designed for use in high-salinity and critical water treatment applications, where a single-stage RO cannot meet required product water quality or recovery targets. Utilizing two sequential reverse osmosis passes (RO + RO), the system can reduce total dissolved solids (TDS) to ultra-low levels—even in brackish groundwater above 8000 ppm or recycled process water with complex chemistry.

Each stage is independently controlled via a centralized PLC + HMI control panel, with real-time conductivity monitoring between stages to ensure stable operation and automatic flushing cycles. The system includes a dedicated interstage break tank, pressure-balancing booster pumps, and flow control logic to optimize energy consumption and extend membrane life.

The containerized layout includes:

  • Stage 1: Primary RO with antiscalant dosing and high-flow pre-filtration
  • Stage 2: Polishing RO stage with ultra-low pressure membranes for final rejection
  • Integrated CIP system supporting both stages with acid/alkali loops
  • Real-time TDS sensors and optional remote access via GSM/SCADA
  • Reinforced container with insulation, ventilation, and optional HVAC

This system is suitable for clients with high-performance expectations: industrial wastewater reuse, brackish deep well treatment, pharmaceutical water supply, and as a pre-polishing step before EDI or ultrapure applications. Whether used in standalone mode or integrated into a larger treatment train, it guarantees consistent quality, operator safety, and maintenance efficiency.

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Product Parameter

Specification Details
Container Size 20FT or 40FT ISO container (based on capacity)
Flow Capacity 2,000 – 10,000 LPH (customized)
Water Source High TDS groundwater, brackish water, process reuse (TDS ≤ 15,000 ppm)
Rejection Rate ≥ 98.5% overall system TDS removal
RO Configuration Stage 1 + Stage 2 (separate membrane banks)
Membrane Type 8040 high-rejection and low-energy membranes (DOW, Hydranautics)
Interstage Tank FRP buffer tank with level sensor and booster pump to feed Stage 2
CIP System Shared CIP unit with dual circuits for both RO stages
Control Panel Central PLC + 7–10" HMI, interstage conductivity monitoring, alarms
Power Supply 380V / 50Hz, optional 60Hz or solar inverter interface
Piping Material UPVC (standard), optional SS316L for critical water
Installation Time Pre-wired and pre-piped, ready in 1–2 working days
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Applicable Industry

  • Brackish and Deep-Well Groundwater Treatment – Ideal for inland industrial zones or rural areas with high-salinity boreholes, especially where single-stage RO cannot meet output water standards.
  • Pharmaceutical and Medical Manufacturing – Used as a primary purification stage before EDI, UV, or ultrafiltration units in cleanroom and sterile production lines.
  • Electronic and Semiconductor Facilities – Provides ultra-low TDS feedwater for rinse processes, wafer cleaning, and cooling systems with zero scale tolerance.
  • Industrial Wastewater Reuse Systems – Enables secondary reuse of treated effluent in factories, reducing water footprint and meeting stringent discharge regulations.
  • Energy and Refinery Sites – Suitable for use in remote power stations, oil refineries, and LNG terminals requiring low-silica, low-conductivity process water.
  • Export Engineering Projects – Adopted by EPC contractors and turnkey developers serving large-scale water infrastructure in high-TDS regions of the Middle East, Africa, and South Asia.

Stark Advantage

Superior Desalination and Water Quality Control with Dual-Stage RO Design
Compared to single-pass systems, dual-stage RO architecture offers significantly higher rejection rates for dissolved salts, silica, heavy metals, and trace organics—achieving final product TDS levels below 50 ppm or even 10 ppm where required.

By separating the filtration process into two pressure stages, the system ensures:

  • More complete removal of ions that typically pass through Stage 1 membranes
  • Reduced osmotic pressure per stage, allowing membrane life extension
  • Lower fouling tendency, thanks to staged pre-treatment and chemical balance
  • Improved water recovery and reduced total chemical usage

This architecture is especially critical in projects where downstream processes (such as EDI, WFI, or ultrapure polishing) require extremely low conductivity and stable water profiles. For clients concerned with product repeatability, microbiological control, and compliance with global water quality standards, the dual-stage RO configuration is a proven, cost-effective solution.

Efficient Operation and Remote-Controlled Smart Management
The STARK dual-stage RO container system is built not only for high rejection performance, but also for sustainable, long-term operation with reduced intervention and energy cost. Through advanced process control and system modularity, it enables low-touch, high-output water purification in even the most remote industrial settings.

Key operational features include:

  • Automated flushing, pressure balance, and membrane protection logic
  • PLC-based centralized control with adjustable operating parameters per stage
  • GSM remote monitoring with real-time alerts for pressure drops, fouling, or conductivity deviation
  • Energy-optimized VFD-driven pumps and flow balancing to reduce electrical load
  • System diagnostics and maintenance reminders via HMI interface or web-based dashboard

This intelligent design ensures fewer manual interventions, predictable maintenance schedules, and faster troubleshooting, making it ideal for EPC firms, utilities, and multinational operators managing multiple plants. Combined with STARK’s global service support and modular spare parts supply, it forms a low-risk, high-reliability foundation for high-value water treatment projects.

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