Spent mushroom substrate pellets
Spent substrate from mushroom farms is either a disposal problem or a raw material for fertiliser pellets.
Mushroom substrate is wet and needs no grinding. The line consists of a hopper, dryer, granulator and packaging. Substrate pellets sell as fertiliser or as a component of garden growing media.
What you need to know
- Grinding
- not needed for a fine fraction
- Typical moisture
- above 15%, a dryer is needed
- Die
- die as for manure

A pellet line for this raw material
Two lines to start from, and below them the production stages: which ones this raw material needs and which machines do the job.

Lines up to 1 tonne per hour
See lines up to 1 t/h
Lines from 1 tonne per hour
See lines from 1 t/h-
Feed hopper needed
Takes in the raw material and feeds it evenly into the line.
Feed hoppers with a screw discharger (V-shaped walls), Feed hoppers with a slat scraper (vertical walls)
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Grinding not needed for this material
Fine, dusty material goes straight on, without a grinder.
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Drying needed
Above 15% moisture the line needs a dryer, sized to the amount of material.
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Pelleting needed
The heart of the line. For this material: die as for manure.
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Cooling it depends
Needed from about 200 to 250 kg/h. It can be skipped with big bags, not with small bags.
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Screening needed
A drum or vibrating screen separates dust from the finished pellets.
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Packing your choice
15 kg bags, big bags or bulk, depending on the buyer.
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Transport between stages needed
Belt and screw conveyors connect the machines into one line.
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Control cabinet needed
Controls the whole line, also remotely from a phone.
Other raw materials
Test your raw material before choosing a line
Send a sample and see what pellets we can make from it. We test the material on our pellet mills and give you recommendations on the die and the choice of machines.
- You fill in the request, we call back and agree how much material to send (usually 2 to 3 bags).
- We pelletise it on the test line in Sieradz; you are welcome to watch.
- You receive a pellet sample and a report with a recommended die and line set-up.







