What is REDcert?
REDcert is a European certification system that verifies whether biomass and biofuels are traded and processed sustainably and transparently. It was specifically developed to meet the requirements of the European Renewable Energy Directive (RED), which defines how
renewable energy can count toward climate goals. While ISCC operates globally, REDcert focuses primarily on the European market. It is widely used in agriculture, the food industry, and the biofuels chain. Companies in the biogas sector can use a REDcert certificate to prove
that their raw materials and production processes are sustainable from the origin of the residual stream to its combustion or digestion. A key feature of REDcert is its close alignment with the European RED II directive. The system checks whether the raw materials used actually contribute to reducing greenhouse gas emissions and whether they are
processed according to social and ecological standards. Digesters and suppliers must keep precise records of what comes in, where it comes from, and how it is processed. REDcert provides a practical and efficient framework to not only promise sustainability but also
prove it.
REDcert is:
• Primarily focused on European regulations
• Closely linked to national implementations of RED II
• Suitable for companies operating mainly within the EU
What is ISCC?
ISCC (International Sustainability and Carbon Certification) is a globally recognized certification system for sustainable raw materials. It was developed to demonstrate that biomass and residual streams are traded and processed responsibly. It’s a crucial system in the biogas sector, ensuring that the residual streams used do not displace food crops, do not originate from protected natural areas, and contribute to a demonstrable reduction in greenhouse gases. ISCC offers full chain transparency: from the origin of biomass to the produced green gas or digestate. With a focus on sustainability, traceability, and CO₂ reduction, these are the key requirements:
• The origin of biomass must be known and traceable.
• CO₂ reduction compared to fossil fuels must be
demonstrable and at least 20%.
• Transport, processing, and consumption are included
in the emission calculation.
ISCC uses mass balance tracking, meaning every amount of sustainable input must remain traceable to the end product (e.g., green gas).
What does this mean in practice?
For Duynie Renewables, it’s no longer enough to simply supply residual streams to biogas plants. Duynie Renewables is ISCC certified, and since ISCC and REDcert accept each other’s systems, it can trade biomass under both certifications. Everything must be documented, analyzed, and certified requiring collaboration with suppliers.
The requirements are strict but necessary. The market demands certification, and with the rise of blending obligations, it’s becoming a hard prerequisite.
Customers want to know:
• Was this truly sustainably produced?
• What is the CO₂ footprint per m³ of gas?
• Can I prove this to the government, regulator, or customer?
The increased value of residual streams
ISCC and REDcert ensure that residual streams are not only used sustainably but also gain added value. Certified streams deliver demonstrable greenhouse gas reductions, count toward climate goals, and make sustainability claims credible. For suppliers, this means more certainty in selling their residual streams often
with higher returns due to additional sustainability subsidies. For buyers, it means a reliable origin of their raw materials.
Standardization through ISCC and REDcert also makes it possible to integrate new residual streams more quickly. Thanks to these systems, Duynie Renewables can operate efficiently with uniform processes, predictable audits, and scalable documentation. This accelerates
the growth of certified chains, exactly what’s needed in a sector that must scale up significantly by 2030. In short, certification enables the transition from isolated initiatives to fully-fledged sustainable chains.
For Duynie Renewables, this means: every residual stream must be analyzed, its origin must be clear, and its CO₂ reduction potential must be demonstrable. The market demands it. Biogas plants want to know what they’re digesting, where it comes from, and how much CO₂ they’re saving.
Certificates as the foundation
The future of the biogas industry lies in chains that are demonstrably circular and efficient. Certification via ISCC or REDcert makes that added value visible and verifiable. In practice, these certificates form the foundation of Duynie Renewable's daily operations. Without
ISCC or REDcert, participation in the sustainable energy market is nearly impossible, as certified chains are required to supply green gas that counts toward blending obligations or to qualify for subsidies.
Certification literally opens the door to the market. But its value goes beyond market access. Both certification systems demand transparency in every link of the chain. Thanks to this traceability, Duynie Renewable can set up chains that are fully controllable, especially important for partners who want to invest in sustainability, but with certainty.
