Color-removal nanofiltration introduced by Pentair
A Color Removal Package (CRP) for water treatment was introduced on 28 June 2013 by membrane filtration specialists Pentair X-Flow.The hollow-fibre nanofiltration technology is highly effective in the removal of natural organic matter (NOM) in fresh water, which adversely affects the water treatment process as well as the color, taste and odor of drinking water. The technology also significantly simplifies the treatment operation system by eliminating three process steps.
The core component of the Pentair X-Flow CRP is the HFW 1000 membrane. Based on the highly flexible X-Flow nanofiltration platform, the membrane fiber combines the chemical resistance of X-Flow's membranes with the organic retention of spiral-wound nanofiltration. The end result provides many advantages compared with conventional technologies, including:
· Pretreatment requires only a 300 micron safety screen before the raw surface water is directly fed to the membranes
· Chlorine resistance assists easy cleaning to help ensure stable operation
· Reduction of bacteria and viruses to >6-log (99.9999%)
· Elimination of three process steps
· A verifiable barrier that can be proven with integrity testing.
The CRP is effective in treating the complex mixture of organic compounds in all fresh water. The technology has achieved a high retention of NOM, expressed as color, humic acids, TOC and UV254, and shows low retention of hardness, including multivalent ions such as Calcium (Ca2+) and Magnesium (Mg2+).
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