EVERZIT® Mn
Manganese dioxide in accordance with EN 13752
Based on naturally occurring manganese dioxide, EVERZIT® Mn is used primarily for catalytic manganese removal in drinking water and mineral water treatment. The high active surface area of EVERZIT® Mn facilitates oxidation of iron and manganese in water with high oxygen content and promotes formation of hydrated oxide floccules which are easily filtered out.
Grain size
Other grain-size ranges can be supplied in accordance with your specific requirements.
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Features and Benefits
- Provides reliable manganese removal at pH levels from 6.5 and upwards
- EVERZIT® Mn does not require any running-in time. Unlike conventional manganese removal process, it demanganizes with full effect immediately upon start-up and in subsequent operation.
- EVERZIT® Mn does not have to be chemically regenerated, unlike conventional media which require regeneration by addition of e.g. potassium permanganate (KMnO4) solution.
- High particulate retention capacity, even with minimum contact time (i.e. at high filtration speeds).
- EVERZIT® Mn is not adversely affected by carbonic acid attack.
Applications
EVERZIT® Mn is used as a single-layer filter media or as the bottom layer (in place of quartz sand) in dual media filters. In certain cases it can be also used in mixed beds in combination with quartz sand.
If the raw water treated has high iron content, use of a sufficiently thick EVERZIT® N upper layer is recommended. This top layer retains most of the iron, protecting the EVERZIT® Mn bottom layer and allowing it to selectively remove manganese.
EVERZIT® Mn is inert to carbon dioxide and reliably removes manganese even at slightly acidic pH levels (i.e. > 6.5). Therefore in most cases there is no need to increase the pH value before manganese removal.
