Seerdrum - The Inner workings

The Seerdrum sits at the heart of a MSW processing facility where the objective is to recover the maximum valuable material from the waste.


Ancillary equipment is required upstream and downstream of the Seerdrum and a typical Process Flow Chart can be found on the MSW to Biomass page.  The minimum requirement is a bag opener and / or a coarse shredder ahead of the Seedrum to ensure a uniform feed of a consistent bulk density.   After the Seerdrum a MRF will be required for the recoverable items and a process for recovering and refining the raw organic fraction.   Please contact us for details on these ancillary processes.

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5 Tonne per Hour Seerdrum Working at Yellowstone Composting Facility, Montana, USA. More than 20 years of service.


By processing the waste in a Seerdrum the organic fraction is removed for separate refining to a cleaned biomass. The refining not only dries the biomass but removes the small inerts such as glass, grit and plastics. This leaves the inert fraction which is sent to the clean MRF where the valuable, recyclable materials such as metals and plastics are recovered. This MRF can be simple manually operated or automated.

Over sized organics, such as lumps of wood are also picked off and shredded before being re-introduced into the Seerdrum where they will be incorporated into the organics pulping.

Typical recovery rates from a Seerdrum recycling plant is 70-80%.


Copyright Vickers Seerdrum Ltd 2012. Seerdrum is a Trademark of Vickers Seerdrum Ltd. Updated 14th Aug 2017