Waste Lipid Categories Explained: UCO, PFAD and POME Oil

In regulated biofuel markets, not all lipid feedstocks carry the same regulatory weight. The distinction between UCO, PFAD, and POME oil — three of the most commercially significant waste and residue lipids in Southeast Asian supply chains — determines Annex IX eligibility, double-counting status, and the certification pathway required under ISCC EU.

This article compares the three categories across their origin, regulatory classification, quality parameters, and practical implications for supply chain operators.

Comparison at a Glance

UCO — Used Cooking Oil

UCO is oil collected after use in cooking — from restaurants, hotels, food courts, industrial food processors, and households. It is the most commercially significant waste feedstock in the biofuel supply chain, particularly for HEFA-based SAF production.

Under EU RED III, UCO is classified as Annex IX Part A waste. This classification gives it the strongest eligibility profile: double counting toward EU member state renewable energy targets, and typically the highest achievable GHG savings due to zero land-use-change attribution.

The challenge with UCO lies in traceability. Because it is collected from thousands of small, dispersed sources, maintaining a complete chain of custody — with collection records, source declarations, and quality certificates at each aggregation point — is operationally demanding. This traceability complexity is the primary reason UCO commands a compliance premium over other lipid feedstocks.

For a detailed guide on UCO as a feedstock, including quality parameters and Malaysia-specific collection context, see What is Used Cooking Oil on UCOIntel.

PFAD — Palm Fatty Acid Distillate

PFAD is produced during the refining of crude palm oil (CPO). Specifically, it arises during the deacidification stage, where free fatty acids are separated from the crude oil. PFAD is not a waste material in the disposal sense — it is a by-product of an intentional industrial process.

Under EU RED III Annex IX Part B, PFAD is classified as a residue. This means it qualifies for biofuel eligibility but does not receive double counting — 1 litre of PFAD-based biofuel counts once toward renewable energy targets, not twice.

PFAD’s classification has been subject to ongoing regulatory discussion at EU level. Some industry participants have argued for Part A (waste) classification, which would grant double counting. The current consensus under EU RED III maintains Part B (residue) status. Operators should verify the current position directly with ISCC or the relevant EU regulatory body before making commercial decisions based on classification assumptions.

PFAD has a very high free fatty acid content (typically >70%), which makes it unsuitable for food use but well-suited for HEFA processing. Its industrial origin means traceability documentation is more centralised than UCO — each batch can typically be traced to a specific refinery.

POME Oil — Palm Oil Mill Effluent Oil

POME is the liquid waste generated during palm oil extraction at the mill level. It contains residual lipids that can be recovered through physical separation processes. The recovered oil — POME oil — can then be processed as a biofuel feedstock.

It is important to distinguish between two POME-related processes. Biogas recovery captures methane from anaerobic digestion of POME’s organic content — this produces energy but not a liquid feedstock. POME oil recovery extracts the residual lipids before or during effluent treatment. Only the recovered oil is relevant as a biofuel feedstock input.

POME oil is classified under Annex IX Part A (waste), giving it the same double-counting eligibility as UCO. However, POME oil volumes are typically smaller than UCO or PFAD — recovery rates depend on mill equipment, effluent management practices, and the efficiency of the oil recovery process.

The Classification Distinction That Matters

The practical difference between Part A and Part B classification cascades through the entire value chain:

Price premium. Part A feedstocks (UCO, POME oil) command a premium over Part B feedstocks (PFAD) because of their double-counting status. This premium is structural — it reflects regulatory incentive design, not quality differences.

Documentation requirements. Waste feedstocks under Part A require proof of waste origin. For UCO, this means collection records from each source point. For POME oil, this means mill-level waste management documentation. PFAD requires process documentation showing it arose as a by-product, but the documentation burden is different in nature.

GHG savings profile. Both Part A and Part B feedstocks achieve strong GHG savings because emissions from the primary production process (cooking, CPO refining, palm oil extraction) are allocated to the primary product, not the waste or residue stream. The difference is in how the savings are counted toward national targets, not in the savings calculation itself.

For a broader view of how these categories fit within the feedstock classification framework — including the distinction between waste, residue, and co-products — see What is Feedstock Classification. For CPO, PFAD, and UCO compared from a global market perspective, see CPO vs PFAD vs UCO Comparison.

Key Terms Reference

For precise definitions of terms used in this article — including FFA, MIU, Mass Balance, and Chain of Custody — see the Feedstock Intelligence Glossary.

The information on this page is for analytical and educational purposes only. It does not constitute regulatory authority or compliance advice. For certification requirements, consult a recognised certification body or qualified advisor.

Frequently Asked Questions

Is PFAD classified as waste or residue under EU RED III?

Under current EU RED III Annex IX guidelines, PFAD is classified as a residue under Part B — not as waste under Part A. This is because PFAD arises as a by-product of an intentional industrial refining process. However, this classification has been subject to ongoing regulatory discussion, and operators should verify the current status directly with ISCC or the relevant EU regulatory body.

What is the difference between POME biogas and POME oil recovery?

POME biogas recovery captures methane from anaerobic digestion of the effluent’s organic content — it produces energy but not a liquid feedstock. POME oil recovery extracts residual lipids from the effluent before or during treatment. Only POME oil recovery produces a feedstock eligible for ISCC certification as a biofuel input.

Which waste lipid has the highest ISCC traceability complexity?

UCO has the highest traceability complexity because it is collected from many small, dispersed sources — restaurants, hotels, food courts, and households — each requiring individual collection records and source declarations. PFAD and POME oil originate from industrial facilities where documentation is more centralised.