Hollow fibre membrane
AQUATOOLS's point-of-use filter is made up of a collection of polyethylene hollow fibres grouped together into a unit.
These fibres are extremely fine and flexible, with an exterior diameter of 0.6mm and a thickness of several tens of microns.
The fibres are hollow and shaped like a straw (tube).
The hollow fibre membranes have multiple pores which vary in size from 0.01 - 0.1 micron. Each membrane consists of several surfaces with microporous structures (micro slits).
Bacteria and any particles in suspension that are larger than 0.1µm are trapped by these structures and retained permanently on the external surface of the membrane.
External/Internal frontal filtration
AQUATOOLS uses a frontal filtration system.
All the fluid requiring treatment flows at right angles to the filter surface and passes through the membrane due to the pressure difference on either side of the membrane.
The water flows from the external to the internal surface of the fibre.
Bacteria and other microparticles that cannot pass through the gaps in the membrane structure are retained on the outer surface and therefore do not penetrate the membrane.
Filtration area/storage of bacteria
The filters' hollow-fibre filtration area makes it possible to filter a larger volume of water.
Consequently, the storage capacity for bacteria and impurities trapped inside the filter is much greater.