Membrane Filtration – Nanofiltration (NF)
Nanofiltration derives its name from its retention capacity, which is in the range of approx. one nanometre. Genuine nanofiltration membranes can separate out anions with more than one negative charge (e.g. sulphates, phosphates). Conversely, the majority of simply charged anions (e.g. nitrates, chloride) can permeate the membrane and cations can only be partially separated out.
As a rule, nanofiltration is used for industrial purposes, where it provides the high degree of purification required, e.g. for water recycling.
WABAG also pursues projects in which, for example, nanofiltration can be employed for partial water softening. A further area of nanofiltration application in future is comprised by the elimination of nano-particles in drinking water and the reduction of endocrine water content.
- Palm, Germany
Industrial wastewater treatment plant