Compact 32V

The Compact 32V is a tubular 3 mm ultrafiltration membrane very well suited for the separation of biological sludge or any other high solids application in which high effluent quality is required. Separating at 0,03 micron, this membrane filter allows only water and dissolved matter to pass, rejecting everything that is undissolved. The filtrate can either be used directly in many applications, or be fed into another (RO) treatment system to remove the dissolved matter. The construction of the Compact 32V allows for backflushing from filtration side to feed side, a cleaning process applied in various heavy-duty operations.


Pentair X-Flow Helix logo slider Pentair X-Flow - The vertically orientated Compact 33V holds 5.2mm tubular ultrafiltration membranes Pentair X-Flow - The vertically orientated Compact 33V holds 5.2mm tubular ultrafiltration membranes


  • Strong unsupported membrane tubes in PES
  • Backflushing from filtration side to feed side up to 2 bar
  • Typically vertically mounted
  • Tight cut-off at 0,03 micron
  • Applicable to total suspended solids levels up to 15 g/l biomass
  • High tolerance to hypochlorite cleaning
  • Large pH-range from pH1 – pH13
  • High flux rates  Easily interchangeable

Functional Description

designed for high solids applications 

The Compact 32V holds 3 mm tubular UF membranes, capable of treating streams with solid concentrations up to 15,000mg/l. The module can be applied in an Airlift configuration.

With these ‘V-type’ membranes, the orientation is vertical which helps building the skids in this way, supporting the optimized Airlift process.

With the Compact 32V, the Airlift mode can be used to optimize the separation process, using air, forward flush and backflush to keep membranes clean and able to do their job with great energy efficiency.

Fields of application

The Compact 32V finds its use primarily in high solids applications, such as separating clean water from biological sludge in membrane bioreactors (MBR’s). The filtrate will be free from solids of any kind and typically have an SDI of < 3, making filtration with the Compact 33V a good pretreatment method for Reverse Osmosis if all dissolved matter needs to be taken out.
The Compact 32V can be used in the following applications:
  • Sludge separation in Membrane bioreactors (MBR’s)
  • Water recycling in algae production
  • RO pretreatment of feed waters high in suspended solids

Specifications - large scale

Compact 32V

Membrane surface area
32 m²
Module dimensions (dxl)
8 inch x 3 meter
Housing material
Membrane material
Hydraulic membrane diameter
3 mm
Nominal pore size
30 nm
1 - 13
Chlorine resistance
250.000 ppm.hrs
Connection configurations: to learn more about other X-Flow membrane modules and their connection configurations, please click here.
Replacement: in case you have Compact modules, you can find your replacement alternative on the replacement page.