Wood Pellets & Biomass
ENplus starts at the production line, not at the audit.
ENplus certification depends on pellets that meet the mechanical durability specification for every batch. Durability shifts with residual wood quality, press condition, and conditioning parameters throughout each shift. The lab result that confirms whether the ENplus threshold was met arrives hours after the batch has left the line. By then, corrective action is impossible. WEMO’s inline PDI measurement systems detect deviations before the batch leaves the plant, correlated to ISO 17831-1:2025, the standard that underpins ENplus A1 and A2 certification.
In wood pellets, consistent quality is not just compliance. It is price.
ENplus A1-certified producers command a price premium over ENplus A2 and uncertified product. That premium depends on demonstrating consistent mechanical durability, not through a spot test taken once per shift, but through continuous, documented quality data across every batch in every run.
The risks that follow from missing that data share a single root cause: ENplus non-compliance, customer claims for excess fines at delivery, and the structural loss of A1 premium pricing. Each traces back to a deviation that was not detected before the batch left the plant.
The certification standards that define where your product competes.
Two ENplus grades define the wood pellet market. Both specify a minimum mechanical durability threshold, tested to ISO 17831-1:2025.
ISO 17831-1:2025 (published March 2025, supersedes the 2015 edition) is the current international standard for mechanical durability of wood pellets. WEMO’s inline PDI measurement systems are correlated to this norm.
Certification
Application
Minimum durability
Test standard
ENplus A1
Residential heating Premium export
≥ 98.0% (DU 98.0)
ISO 17831-1:2025
ENplus A2
Industrial combustion
≥ 97.5% (DU 97.5)
ISO 17831-1:2025
From a result that arrives too late, to one that informs your next decision.
The Kempink PDI methodology, developed from 2012 and brought to the production line by WEMO-techniek in 2017, is the reference measurement approach for European wood pellet producers. Two inline systems apply it at different levels of capability. Both are delivered as Quality-as-a-Service. For physical batch documentation, the Inline Packing & Coding System can be added to either subscription.
Inline Kempink Tester Ctrl
Per-batch PDI measurement on the production line
Automated PDI measurement per batch, directly on the pressing line. Results correlated to ISO 17831-1:2025, communicated to your MES in real time. Every batch confirmed before it leaves the plant. The baseline solution for producers who need continuous quality documentation for ENplus compliance.
Inline Kempink Tester Crtl +
Predictive PDI management: measurement, prediction, and targeted adjustment recommendations
The Ctrl adds predictive intelligence to inline measurement. Based on recipe data and accumulated process history, it predicts expected durability before the batch is complete, and provides operators with targeted adjustment recommendations. For producers managing multiple pressing lines, high seasonal raw material variation, or large-volume batch runs where detecting deviation early is commercially critical.