Membrane water softeners are based on Nanofiltration (NF) membranes, which reduce operating costs and provides optimum hardness rejection.
Nanofiltration membranes are designed to remove divalent ions, which cause water hardness (Calcium and Magnesium). Therefore, they are also referred to as softening membranes.
Typically, NF membrane have higher permeability than brackish-water membranes and comparable rejection of bivalent ions (i.e., Ca, Mg, Mn, Fe, SO4), large organic molecules and of pathogens (bacteria, protozoa, and viruses).
However, Nanofiltration membranes have a lower rejection of monovalent ions (Sodium, Chloride, Boron etc) compared with brackish-water membranes or seawater membranes. Their looser membrane technology reduces the capacity to reject most monovalent salts but are capable of delivering a higher filtered water, hence nanofiltration systems operate at lower feed pressure than reverse osmosys sistems.
TURBIDITY FILTERS
WATER SOFTENERS
REVERSE OSMOSIS DESALINATION
IRON AND MANGANESE FILTERS
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