Sand Filters


Sand filtration is frequently used to remove particulate matter, inorganic insoluble substances, suspended solids and turbidity from water. The filtration medium consists of a multiple layer of sand with a variety in size and specific gravity. Sand filters can be supplied in different sizes and materials and their operation is usually fully automatic.

Applications for sand filtration:

* Preparation of cooling water
* Treatment of waste water
* Production of drinking water
* Filtration in swimming pools
* Pre filtration for membrane systems
* Filtration of grey or surface water

When the filters are blocked during operation with particles, the flow direction is reversed and the flow is increased in order to clean the filter again. The time for the cleaning is determined by one of the following criteria:

* Volume
* Pressure drop over the filter
* Time

OSMO SISTEMI's standard Sand filters can be used to treat up to 90 m3/h per unit of raw water. We supply fiberglass GRP and carbon steel tanks with diameter from 250 to 2400 mm specially treated internally to cope with secondary treatment effluent, well, surface or sea water.



Auomatic Sand Filter

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Carbon steel epoxy coated tanks


Filtering diffusers arrangement



Filtration plant cap. 300 m³/d


Sand filter with insulate pipe

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