The grinder can grind a wide variety of materials, biomass or residues from other processes. It has two sets of grinders, one for harder materials like bark, chips and dried sludge, one for softer materials like cellulose.

The grinder also has five sieve rings, the smallest of them letting through particles with a maximum diameter of 0.1 mm, up to the biggest letting through particles with a maximum diameter of 3 mm. The energy needed for the grinding can be measured.

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