But one of the main goals for a trommel screens in your recycling system is to sift out the smaller stuff at the beginning of the line, so that your downstream equipment can be sized to handle only the volume of material that has to be sized-reduced.

A good example for this would be in a process application for screen-rejects. Screen-rejects are coming out of the Pulpers in a paper mill, which includes plastic and strapping and other materials indigestible by the pulpers. These screen-rejects can be used as an alternative fuel source, but must first be processed. Say you have a volume of about 3 tons of this material per hour. But 20% of it is already small enough for your purpose. Screening the material with a Trommel Screen takes that 20% out of the material stream, so your Grinder (or shredder if you prefer) only has to be sized for 2.5 tons instead of 3 tons.

Check out the video link below to see a Zeno Trommel Screen in the above application.

Trommel High Resolution.wmv

Trommel Low Resolution.wmv