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Help CenterTwo-Stage Reverse Osmosis Unit for High-Salt High-COD Wastewater, 2000LPH Flow Rate, Automatic Operation
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Welcome to Qingdao Conqinphi Environmental Technology Group Co., Ltd. – a professional manufacturer established in 2015 with a factory area of 10,000–30,000 square meters and a dedicated team of 201–300 employees. Our annual export value reaches US$10–50 million, and we serve markets across North America, South America, Europe, Asia, Africa, and Oceania. We are proud to present our Two-Stage Reverse Osmosis Unit for High-Salt High-COD Wastewater, designed to tackle the most challenging industrial effluents. With a precise flow rate of 2,000 liters per hour and fully automatic operation, this system delivers reliable performance for wastewater recycling and discharge compliance.
Our two-stage reverse osmosis unit is engineered for high-efficiency treatment of wastewater containing elevated salinity and chemical oxygen demand (COD). The first stage employs robust pre-treatment and RO membranes to reduce bulk contaminants, while the second stage polishes the permeate to achieve superior quality. The automatic operation minimizes manual intervention, with PLC-based control and intuitive touch-screen interface for real-time monitoring and adjustment. Whether you need to treat brine from desalination, textile dyeing, petrochemical, or pharmaceutical processes, this unit offers a scalable and cost-effective solution.
Key Features & Technical Specifications
- Two-Stage Design: Dual RO stages ensure high rejection of dissolved solids (TDS) and organic compounds, achieving permeate quality suitable for reuse or discharge.
- High-Salt & High-COD Handling: Specially selected membranes and optimized feed pressure allow stable operation with TDS up to 20,000 ppm and COD up to 1,000 mg/L (customizable for higher loads).
- Automatic Operation: PLC-based automation with HMI touch screen enables one-button start/stop, auto-flushing, and fault alarms; optional remote monitoring via SCADA.
- Stainless Steel Construction: All wetted parts (piping, pressure vessels, frame) are made of SS304 or SS316L for corrosion resistance and long service life.
- Energy Efficiency: Equipped with energy recovery devices (optional) and high-efficiency pumps to reduce power consumption.
- Modular Skid-Mounted: Pre-assembled and tested, easy to install and integrate with existing wastewater treatment systems.
- Low Maintenance: Automatic cleaning cycles (CIP) and simple membrane replacement procedure reduce downtime.
| Flow Rate | 2,000 LPH (48,000 LPD) |
| Feed Water TDS Limit | ≤ 20,000 ppm |
| COD Limit | ≤ 1,000 mg/L (higher available upon request) |
| Recovery Rate | 55% – 75% (adjustable) |
| Membrane Type | Thin Film Composite (TFC) – BWRO/FR Series |
| Operating Pressure | First stage: 10–15 bar; Second stage: 8–12 bar |
| Power Supply | 380V / 50Hz / 3-phase (customizable) |
| Control System | PLC + 7" Touch Screen (Siemens or Mitsubishi) |
Why Choose Our Two-Stage RO Unit? This system significantly reduces your operating costs compared to traditional evaporation or chemical treatment. The automatic operation ensures consistent water quality while minimizing labor requirements. With proper pre-treatment, the membranes can last 3–5 years, providing a fast return on investment. Our team offers free water analysis and proposal design – contact us to receive a customized solution tailored to your specific salinity and COD levels.
Trusted Manufacturer with Global Reach
As a reliable manufacturer located in Qingdao, Shandong, China, we have delivered hundreds of industrial RO systems to clients worldwide. Our factory is equipped with modern production lines and a rigorous quality control system that complies with ISO9001, ISO14000, and other management standards. We have earned certifications such as HACCP, SA8000, and TL900, reflecting our commitment to quality, social responsibility, and information security. With an annual export value of US$10–50 million and a presence in over 15 regional markets, including North America, Europe, Southeast Asia, and Africa, we have built lasting partnerships with wastewater treatment plants, chemical factories, and municipalities.
Take the Next Step – Let us help you achieve regulatory compliance and water reuse goals. Request a quote or a technical datasheet today. Our engineers are ready to provide pre-sales consulting, on-site installation guidance, and after-sales support. With Qingdao Conqinphi, you get not only a high-performance product but also a dedicated partner in environmental technology.
Frequently Asked Questions
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Q: What type of wastewater can this unit treat?
A: It is specifically designed for high-salt (TDS up to 20,000 ppm) and high-COD (up to 1,000 mg/L) wastewater, such as from textile, petrochemical, pharmaceutical, and landfill leachate. For extreme conditions, an upgraded model is available. -
Q: How does the two-stage process improve water quality?
A: The first stage removes most dissolved solids and organics, while the second stage polishes the permeate to meet stricter standards (e.g., -
Q: Is the system fully automatic? What monitoring is included?
A: Yes, automatic start/stop, backwashing, and chemical dosing. The PLC displays real-time parameters (pressure, flow, conductivity) and triggers alarms for abnormal conditions. Remote monitoring is optional. -
Q: What is the typical power consumption?
A: For a 2,000 LPH unit, power consumption is about 5.5–7.5 kW depending on feed water salinity and desired recovery. Energy recovery devices can further reduce consumption. -
Q: Do you provide installation and maintenance support?
A: Yes, we offer detailed installation manuals, remote technical support, and optional on-site commissioning. We also supply spare parts and membrane cleaning chemicals. -
Q: Can the unit handle fluctuating inlet conditions?
A: Our control system adjusts operating parameters (pressure, flow) automatically. However, we recommend a stable pre-treatment system and buffer tank for optimal performance. -
Q: What certifications does the product have?
A: The unit is manufactured under ISO9001, ISO14000, and other quality management systems. Specific components may have CE, UL, or CSA marks depending on client requirements. We can provide compliance documentation upon request. -
Q: What is the warranty period and after-sales service?
A: Standard warranty is 12 months from commissioning or 18 months from shipment. We have a global network of agents for quick response. Spare parts can be delivered within 7–15 days.
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