Rotary filter

Holland Filter rotary filters

The drum filter is a mechanical, self-cleaning filter designed for high separation efficiency where particle fragmentation must be avoided.

It operates without pressure and has a robust construction with few moving parts for long life and low maintenance costs.

Liquid is filtered from inside to outside through a slowly rotating drum. The filter medium separates solids carefully from the liquid.

Separated particles are sprayed off the cloth and discharged via a collection trough.

Applications

Rotary filters remove relatively coarse particles (larger than 0,10 mm) from wastewater streams.

Common uses include greenhouse water filtration, fish/meat processing, composting and food production.

Rotary filters are available in various sizes depending on capacity.

How the rotary filter works

Rotary filters are supplied in stainless steel AISI 304. Screen opening varies from 10 to 3000 micron (to be determined).

Liquid enters inside the drum and is filtered as it flows out through the screens.

Dirt remains on the screen and rotates to the top, where water nozzles clean it.

Dirt discharge

A hopper (arrow) inside the drum collects and discharges the filter cake.

Filtration operates without pressure.

Capacity depends on the filter surface dimensions.

Particles collect on the screens and rotate to the top of the drum.

Spray nozzles clean the screen and the filter cake falls down.

Horticulture

Ebb-and-flow irrigation

• Plant nursery
• Vegetable nursery

Suspended filter!

To save space, the filter can be ceiling-mounted in a greenhouse or industrial hall.

Potato processing application

4-stage wash water cleaning in potato processing

• Step 1 = sieve bend
• Step 2 = cyclone
• Step 3 = rotary filter
• Step 4 = bag filter

Rotary filter models