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Iron and Manganese Removal
Quantum DMI-65 Media
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 DMI-65,
silica sand based filtration media, 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 as low as 0.005 PPM
and manganese to 0.001 PPM. After initial activation, the
DMI-65 acts as an oxidation catalyst with immediate
oxidation and filtration of the insoluble precipitates.
The media has been used extensively in a wide variety of
applications. It has been used in many countries for
drinking water applications for over 20 years. DMI-65 is
also being used in the United States for iron removal in
steel mill cooling water to prevent plugging of spray
nozzles, and in boiler feed water systems to protect RO
membranes. DMI-65 is manufactured in Australia and for
availability, contact K2O Consulting.
| Technical Specifications |
| Physical Properties |
Operating Conditions |
| Color |
Brown to Black |
pH Range |
5.8 - 8.6 |
| Bulk Density |
91.0 lbs. / ft 3 |
Maximum Water Temp. |
113° F (45° C) |
| Specific Gravity |
2.69 |
Minimum Bed Depth |
24 Inches (600 mm) |
| Effective Size |
0.48 mm |
Freeboard |
40% Minimum |
| Uniformity Coefficient |
1.3 |
Service Flow Rate |
2-12 GPM / ft2 |
| Mesh Size |
20-50 |
Backwash Flow Rate |
10-20 GPM / ft2 |
| Annual Attrition |
1-5% |
Backwash Expansion |
15-50% |
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Advantages of DMI-65 Media
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- Eliminates the need for potassium permanganate - Operates with continuous injection of sodium hypochlorite at low residual levels (0.1-0.3 PPM).
- Certification - DMI-65 is NSF and ANSI 61 Certified so it can be used for drinking water applications.
- Wide pH Range - Stable and satisfactory performance at pH 5.8 – 8.6
- High Flow Rates - DMI-65 can operate at linear filtration velocities up to twice that of conventional media with a corresponding reduction in capital equipment costs.
- Higher Operating Temperature - Maximum operating temperature of 113° F (45° C).
- Long Life - DMI-65 is not consumed in the process, providing considerable advantages over other processes or media.
- Regeneration not Required - After initial activation, only sodium hypochlorite feed is required.
- System Compatibility - Physical properties are similar to that of competitive media allowing conversion to DMI-65 without major hardware modifications.
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