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The Unidro sand filter is a continuously operating filter, i.e.
the filter does not have to be taken out of operation for backwashing or
cleaning. Incoming water is filtered upstream through the sand bed while
the sand is moving downwards. Simultaneously with the filtration process,
fouled sand is cleaned in a sand washer and the suspended solids are
discharged with the wash water.
The continuos type filters are the ideal answer for several type of applications
and offers significant advantages versus the conventional filters.
- No need for the filters to be put off-service during backwash.
Filtration and backwash occur simultaneously.
- The quality of filtrate is constant during the cycle.
- No need for storage of backwash water.
- No need for backwash pumps and blowers.
Applications:
- Municipal and industrials tertiary treatments
- Final effluent treatment for phosphorus reduction
- Industrial water recovery
- Side strema filtration of cooling water circuits
- Surface water treatment
- Rain water treatment
- Denitrification
Standard modules
The production of Unidro continuos filters is standardized.
The following filters sizes are available:
| TYPE |
DIAMETER |
| DST 07 |
960 mm |
| DST 15 |
1400 mm |
| DST 30 |
1900 mm |
| DST 50 |
2500 mm |
| DST 80 |
2800 mm |
For each model, different filtering sand layer depth are available.
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