The STRO network-type reverse osmosis (RO) membrane is a high-pressure membrane element specifically designed for the concentration and recovery of high-salinity, high-concentration wastewater with low suspended solids. Its unique 45° dual-layer open-channel structure combines the advantages of open-channel and spiral-wound membranes, enhancing water treatment efficiency and significantly improving fouling resistance.
This membrane is ideal for deep treatment and reuse of high-load wastewater and is widely applied in zero-discharge industrial wastewater projects with high salinity and pollution levels.
The STRO membrane operates on high-pressure reverse osmosis principles, using a 45° diamond-shaped dual-layer open-channel design to ensure uniform fluid distribution and effective scouring between membrane sheets.
The flow path generates turbulence, reducing concentration polarization and scaling risks while enhancing flux recovery. Wastewater passes through the membrane, producing permeate water for reuse, while concentrate is further concentrated or crystallized for resource recovery. The modular design allows integration with zero-discharge systems, achieving up to 95% recovery rates.
l High Salt Rejection: Achieves up to 99% desalination under standard testing conditions, providing stable permeate quality.
l Strong Fouling Resistance: Hydraulic optimization reduces concentration polarization, minimizing fouling and scaling.
l Special Flow Channel Design: 45° diamond-shaped dual-layer channels improve scouring, speeding flux recovery.
l Easy Maintenance: Modular, series-configurable design allows flexible cleaning and inspection.
l Space-Saving: High membrane stacking density reduces footprint and lowers project costs.
l Optimized Structure: Fewer seals improve reliability and extend membrane lifespan.
l Low Pressure Operation: Reduced system pressure lowers energy consumption and ensures stable operation.
l Cooling Water Reuse: Enhances circulation efficiency and reduces discharge load.
l Landfill Leachate Treatment: Deep desalination and concentration for reduced discharge when combined with evaporation systems.
l Mining and Coal Chemical Wastewater: Efficient treatment of high-salinity, high-pollution wastewater for resource recovery.
l Coking and Chemical Wastewater Reuse: Acts as a terminal membrane system to maximize recovery rates.
l Electroplating and Steel Wastewater: Treats high-salinity, heavy-metal wastewater to meet discharge standards or enable resource reuse.
l High-Concentration Brine Concentration: Suitable for pre-crystallization concentration and other high-salinity wastewater scenarios.
| Parameter | Unit | ST-40-8035 | ST-40-8042 | ST-60-8035 | ST-60-8042 |
| Feed Water Flow Rate | m³/h | 4~8 | 5~12 | 4~8 | 5~12 |
| Max Cleaning Temperature | ℃ | 45 | 45 | 45 | 45 |
| Max Operating Temperature | ℃ | 40 | 40 | 40 | 40 |
| Max Operating Pressure | bar | 90 | 90 | 120 | 120 |
| Normal Operating Pressure | bar | 40~80 | 40~80 | 60~110 | 60~110 |
| Overall Length A | mm | 1200 | 1400 | 1200 | 1400 |
| Membrane Diameter B | mm | 218 | 218 | 224 | 224 |
| Membrane Area | m² | 25 | 32 | 25 | 30 |
| Typical TMP (ΔP) | bar | 0.5~0.7 | 0.5~0.7 | 0.5~0.7 | 0.5~0.7 |
| Salt Rejection @25℃ | % | ≥98.5% | ≥98.5% | ≥97.5% | ≥97.5% |
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