DMI-65 is a powerful silica sand based catalytic water filtration media that is designed for the
removal of Iron and Manganese without the use of potassium permanganate. The unique microporous
structure of DMI-65 efficiently removes dissolved iron to the almost undetectable levels as low as 0.001 PPM and
manganese to 0.001 PPM. DMI-65 acts as an oxidation catalyst with immediate oxidation and filtration of the
insoluble precipitates derived from this oxidation reaction. DMI-65 can also remove Arsenic, Aluminium
and other heavy metals and Hydrogen Sulfide under certain conditions. In our experience it performs better with a lower life cycle cost than birm, maddox or green-sand alternatives.
DMI-65 has been certified to the US Standard of NSF/ANSI 61 for Drinking Water System Components and for use in England and Wales Under Regulation 31(4)(a) of the water supply (Water Quality) regulations 2010 and has also been tested by many other water treatment authorities and laboratories.
Operating parameters or best results:
-Dose an oxidant such as Sodium hypochlorite or Calcium hypochlorite upstream of the filter to maintain a 1-2ppm chlorine residual.
-Maintain the pH between 55.8-8.6. (or as close as possible to 8 for Manganese removal)
- Use manufacturer's recommended filter loading rates, typicaly 5-20 m3/m2/hr
- Recommended backwash flow rate: 30-40m m3/m2/hr (bed expansion 20-50%)
- Minimum media bed depth: 600mm
- Filter freeboard (open space above media): minimum 40% of bed depth.
- Raw water arameters: Turbidity<2NTU, Salt<1000ppm, Calcium<200ppm, TDS<2000ppm, Iron<15ppm, Manganese<3ppm, Ammonia<1ppm, Silica<70ppm
Physical Properties:
Color: Brown to Black
Specific Gravity: 2.69
Bulk Density: 1.46 ton/m3
Mesh size 20x40
Annual attrition: 1-5%
Maximum temperature: 45 deg Celsius
See downloads below for additional information or contact us for assistance:
DMI65 Advanced Oxidation
Activating DMI-65
Technical Data Sheet
What's in the box
1 x 21kg bag of DMI-65 filtration media
