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Hollow fiber membrane traps very fine particulates, and permits accumulated material to be flushed away periodically.

Hollow fiber is an ultrafiltration technology utilizing a membrane separation process that allows removal of suspended solids including particles, colloids, cysts, bacteria and viruses. UF membranes remove suspended solids based on pore size.

Hollow fiber membranes are formed in hollow fibers and configured in modules containing multiple fibers. Our HSD4400 uses an inside-out flow. This means that feed water travels down the bore of the fiber and passes through the fiber to the outside where it is collected as treated (filtrate) water.

Hollow Fiber               

Water and particulates will enter the center of the hollow fiber. The water passes through the membrane wall where it is collected as filtrate, while the particles larger than membrane pores are retained by the membrane. These particles are retained inside the fiber bore until a flush cycle is activated, when the membrane is periodically flushed to remove the retained solids from the membrane surface.

Service Cycle

  • During service operation the membrane will filter particles down to .025 microns (25 nanometer) at flow up to 10 gpm.
  • To maximize membrane capacity and service life, a metered flushing cycle is controlled using an advanced controller and high-performance turbine meter.
  • The self-cleaning forward and backflush cycle are initiated when the programmed capacity of the membrane is reached.
Backflush Cycle
  • In order to avoid clogging of the membranes, a backflush sequence is necessary at periodic intervals.
  • The backflush sequence forces the filtrate in "reverse direction” through the membrane to loosen particles from the surface and rinse off sediment build-up.
Forward Flush Cycle
  • A Forward Flush, in which raw water passes through the capillaries at a high speed, scours particles from the membrane surface and rinses them from the system.
  • Conducted directly after a Backflush, this process thoroughly removes particles from the membrane surface and removes the loose particles from the fibers.
The hollow fiber membrane traps very fine particulates, and permits accumulated material to be flushed away periodically. This eliminates frequent course prefilter changes and the flushing mechanism restores like-new filter operation and performance. Hollow fiber cartridge estimated to last up to 3 years and more.

Hollow fiber ultrafiltration can be used for many applications requiring the removal of suspended solids including particles, colloids, cysts, bacteria and viruses.

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