Koch Membrane Systems, Inc. (KMS) has received certification of compliance with NSF/ANSI Standard 61 for nanofiltration (NF) and reverse osmosis (RO) elements. These elements include the FLUID SYSTEMS TFC SR 2, TFC-S, TFC-HR, TFC-XR and TFC-ULP spirals, in sizes from 8-in. to 18-in. diameter MegaMagnum RO elements.
The newly certified MegaMagnum elements provide significant economies of scale and reduced space requirements for water treatment facilities. A single 18-in. x 61-in. MegaMagnum spiral element contains 2,800 sq ft of membrane surface area. The certified NF elements include both TFC-S “Softening” and TFC-SR2 “Selective Rejection” membrane types. Both membranes are effective in removing hardness, organics (i.e. disinfection byproduct precursors) and color at low operating pressures. The SR2 membrane allows more monovalent ions to pass through the membrane, reducing brine concentration, osmotic pressure and operating pressure requirements.
The TFC-ULP element uses an “Ultra-Low Pressure,” high rejection membrane for treating brackish water and is ideal for use in municipal drinking water applications where high permeate quality, low pressure operation and the associated energy savings are primary considerations. The TFC-HR “High Rejection” membrane provides higher salt rejection and more fouling resistance than most low-pressure RO membranes.
The TFC-XR element is an excellent choice for high-purity water applications where silica and TOC removal are primary considerations, and in applications where high-quality permeate is required from a high salinity brackish feed. Typically operating in the 250 to 450 psi range, the TFC-XR element is also an excellent replacement option for elements made from cellulose acetate (CA) membranes that usually require higher operating pressure.
KMS also offers a broad line of antiscalants and several cleaners that have been certified to NSF/ANSI standard 60. All chemical formulations are carefully reviewed by KMS process engineers and membrane and polymer scientists to ensure that they will provide enhanced performance benefits, including physical and chemical compatibility with KMS membranes. KOCHKLEEN cleaners and storage solution, and KOCHTREAT antiscalants help prolong membrane life and reduce cleaning cycle time.