In England, Wales, and Northern Ireland, the certification criteria are:
- BCS Scheme Rules – The Scheme Rules detail how the Biofertiliser Certification Scheme actually operates and include procedures for application to the scheme, product complaint investigation, etc.
- PAS 110 - This specification sets out the technical requirements for the AD process and production of anaerobic digestate, including the minimum quality criteria. It specifies requirements for a Quality Management System (QMS) for the production of digestate to ensure they are consistently fit for their intended uses.
- Anaerobic Digestion Quality Protocol – The Quality Protocol sets out criteria for the production of quality digestate from anaerobic digestion of source-segregated biodegradable waste (biowaste). Quality digestate from anaerobic digestion include the whole digestate, in addition to any subsequently separated fibre or liquor fractions. If these criteria are met, quality outputs from anaerobic digestion will normally be regarded as having been fully recovered and to have ceased to be waste.
Operators in Scotland can apply for End of Waste (England, Wales, and Northern Ireland) if supplying to England, Wales, or Northern Ireland.