Hydranautics NANO-BW Membrane

Nano BW are high performance nanofiltration membranes ideal for treatment of low salinity surface or ground waters containing high molecular weight organics or pesticides. They provide 50%-90% salt rejection with ultra-low-pressure operations, increased energy savings, and significantly lower installation and operating costs.

NANO-BW Specifications:

• MgSO4 Permeate Flow (Nominal): 11,000 gpd (41.6 m³/d)
• MgSO4 Rejection (Nominal): 99.7% (99.5% minimum)
• Configuration: Spiral Wound
• Membrane Polymer: Composite Polyamide
• Nominal Membrane Area: 400 ft² (37 m²)
• Feed/Brine Spacer Thickness: 34 mil (0.87 mm) with HYDRAblock Technology

The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:

• 2000 ppm MgSO4
• 130 psi (0.9 MPa) Applied Pressure
• 77 °F (25 °C) Operating Temperature
• 15% Permeate Recovery
• 6.5 – 7.0 Feed pH

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Standard Operating Limits:

• Maximum Applied Pressure: 600 psig (4.14 MPa)
• Maximum Chlorine Concentration: < 0.1 PPM
• Maximum Operating Temperature: 113 °F (45 °C)
• pH Range, Operation (Cleaning): 3.0 - 9.0 (1.0 – 11.5)
• Maximum Feedwater Turbidity: 1.0 NTU
• Maximum Feedwater SDI (15 mins): 5.0
• Maximum Feed Flow: 75 GPM (17.0 m³/h)
• Minimum Ratio of Concentrate to
• Permeate Flow for any Element: 5:1
• Maximum Pressure Drop for Each Element: 10 psi

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• Low salinity surface or ground water with high molecular weight organics or pesticides

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