Hydranautics HYDRAcap 40 Membrane

Compared to conventional pretreatment, HYDRAcap 40 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. HYDRAcap 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).

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 Specifications

• Filtrate Flow: 7.7 – 18.9 gpm (1.8 – 4.3 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: 320ft2 (30m2)
• Fiber Dimensions: ID 0.031” (0.8 mm), OD 0.055” (1.4 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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