Certification of solid biofuels

With solid biofuels, it is important to pay attention to ash melting behaviour. The products are tested in accordance with DIN EN 14961-1, DIN EN 14961-2 and DIN EN 14961-3. They are checked for particle size, calorific value and nitrogen and heavy metal content.

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DLG test criteria for solid biofuels

Wood chips

  • Requirements according to DIN EN 14961-1: Particle size, water density, bulk density, ash content, calorific value, nitrogen, sulphur and chlorine content, heavy metal content
  • Ash melting behaviour

Wood pellets

  • Requirements according to DIN EN 14961-2: Diameter and length, water content, bulk density, fine content and mechanical strength, ash content, calorific value, nitrogen, sulphur and chlorine content, heavy metal content
  • Ash melting behaviour

Wood briquettes

  • Requirements according to DIN EN 14961-3: Diameter, length, width, height, water content, particle density, ash content, calorific value, nitrogen, sulphur and chlorine content, heavy metal content
  • Ash melting behaviour

Firewood

  • Requirements according to DIN EN 14961-1: Colour and appearance of the logs and cut surfaces, mean length and diameter, water content, volume percentage of split wood, ash content, calorific value, nitrogen, sulphur and chlorine content, heavy metal content
  • Ash melting behaviour
  • Proportion of mould and rot
DLG Medal Quality Seal

DLG-certified quality

The DLG quality seal stands for tested agricultural inputs. Regular testing ensures consistent quality. Special features or innovations can also be independently verified – visibly indicated directly on the certification mark.

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T&C

Testing and Certification ordinance

Complaint management

Accreditations & Designations

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