Hydranautics HYDRAcap 40-LD Membrane

Product Description

HYDRAcap 40-LD is used to treat surface water, ground water, seawater and waste waters as either primary treament or as pretreatment to reverse osmosis (RO) and nanofiltration (NF). Compared to conventional pretreatment, HYDRAcap allows for higher fluxes for RO and NF systems while maintaining longer intervals between cleanings. In some cases it replaces conventional pretreatment for potable applications, ground water recharging and water recycling.

Capillary Technology vs. Conventional Pretreatment

Significantly better filtrate quality when compared to conventional pretreatment, exhibiting 100% removal of colloidal material.
Product quality is stable even during feedwater vibrations
Single-step treatment reduces operating costs and increases efficiency
Can significantly reduce use of pretreatment chemicals
Backwash disposal is less problematic
Increased efficiency of RO membrane system design and operation, contributing to reduced capital and operational cost
Maximizes RO performance by allowing elements to operate longer with less cleaning
Low pressure operation

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HYDRAcap 40-LD Specifications:

Filtrate Flow: 5 – 12.3 gpm (1.1 – 2.8 m³/h)
Filtrate Turbidity: ≤ 0.07 NTU
Virus removal ≥ 4 log
Bacteria removal ≥ 4 log
Configuration: Capillary Ultrafiltration Module
Membrane Polymer: Hydrophilic Polyethersulfone
Nominal Membrane Area: 208 ft² (19.3 m²)
Fiber Dimensions: ID 0.047” (1.2 mm), OD 0.08” (2.0 mm)
Pore size: 0.02 micron

Typical Process Conditions:

Backwash Flux: 100 – 150 gfd (170 – 255 l/m²/h)
Backwash Duration: 30 – 60 seconds
Backwash Frequency: 20 – 60 minutes
Chemical Enhanced Backwash Frequency: 0 – 4 times per day
Chemical Enhanced Backwash Duration: 1 – 30 minutes
Disinfection Chemicals: NaOCl, H₂O₂, ClO₂ or NH₂Cl
Cleaning Chemicals: NaOH , HCl, H₂SO₄, or Citric Acid

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Standard Operating Limits:

Typical Filtrate Flux Range: 35 – 85 gfd (59 – 145 l/m²/h)
Maximum Applied Feed Pressure: 73 psig (5 bar)
Maximum Transmembrane Pressure 20 psig (1.4 bar)
Maximum Backwash Transmembrane Pressure: 20 psig (1.4 bar)
Instantaneous Chlorine Tolerance: 100 ppm
Instantaneous Hydrogen Peroxide Tolerance: 200 ppm
Maximum Chlorine Exposure: 100,000 ppm-hrs
Maximum Instantaneous Feed Turbidity: 200 NTU
Maximum Operating Temperature: 104°F (40°C)
pH Operating Range: 4.0 - 10.0
Cleaning pH Range: 1.5 – 13.0
Operating Mode: Inside to Outside Filtration
Direct flow or Crossflow
Certifications: NSF61, CDPH, and ETV-NSF Verification

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The 0.8 mm HYDRAcap is used for surface water applications containing lower turbidities.
The 1.2 mm HYDRAcapLD offers a 50% larger capillary diameter for a wider range of high fouling applications.
A pretreatment step for desalination, treatment of surface waters and municipal and industrial effluents.

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Hydranautics HYDRAcap 40-LD Membrane

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