Multimedia Filter Vessels

Filter Vessel with Multimedia Filter Filling

Part description

By using the filter vessel with a multimedia filter fill and a lower filtration speed, complete filtration of suspended organic material is achieved. The filter layers of gravel, sand, and anthracite ensure that the entire filter bed needs to be backwashed less frequently and can be cleaned through backwashing to effectively remove captured dirt.

Applications of the Multimedia Filter Vessels

• Pre-filtration for disinfection equipment
• Preparation for micro- and ultrafiltration
• Swimming pool filtration
• Groundwater purification
• Separation processes involving flocculants
• Water treatment plants
• Suitable for various filter media (activated carbon, neutralizing media)

General Specifications of Filter Vessels with Multimedia Filter Fill

A multimedia filter bed consists of three layers: anthracite, sand, and gravel. The anthracite layer captures coarse dirt to prevent the formation of crusted layers on the filter bed, while smaller particles remain in the sand layer. The gravel layer ensures even water flow to the filter nozzles. This filter package removes particles up to 15 to 20 microns and can even filter particles of 5 to 10 microns when using a coagulant. Thanks to the specific structure of the filter bed, it needs to be backwashed less frequently than regular sand bed filters.

The filter must be backwashed once the pressure drop increases at a constant flow rate due to attached particles. Backwashing occurs with a higher flow rate, causing the particles to detach and be flushed out of the vessel. The filtered water from another filter or untreated water can be used for backwashing.

Multimedia filters can also be used as a vessel for soluble materials, which can help restore key properties such as the pH value of the water. The filters are coated with a zinc phosphate layer and then electrostatically coated with polyester for a perfect coating of approximately 120 microns in thickness.

Free Filter Advice

For additional information, you can download the brochure or contact one of our advisors.