- Home
- Companies
- Unidro SpA
- Products
- Continuous Sand Filters
Continuous Sand Filters
Incoming water is distributed to the bottom of the filter and flows upward through the sand where it reaches the filtered water outlet at the top side of the filter. Simultaneously within the filtration process, the sand is migrating downwards and then lifted by an airlift to the top where contaminated sand is cleaned in a sand washer and the suspended solids are discharged within this wash water. Cleaned sand then falls downward onto the filtering sand layer.
CONTISAND does not require the traditional backwash facilities (which includes pumps, sequencing ON/OFF valves, water holding tanks) nor PLC/DCS inputs as the operation of a CONTISAND system is continuous and self-adjusting. It only requires pressurized air or gas either provided by a utility system or generated by a dedicated small compressor
- No need for the filters to be put off service during backwash. Filtration and backwash are occurring simultaneously.
- The quality of the filtrate is constant during the cycle.
- No need for storage of the backwash water.
- No need for backwash pumps and blowers.
- No need of automatic sequencing valves and a PLC to handle operation and backwash cycles.
- Municipal and industrial tertiary treatment
- Final effluent treatment for phosphorus reduction
- Industrial water recovery
- Side stream filtration of cooling water circuits
- Surface water treatment
- Rain water treatment
- Produced water filtration
