Fats Oils Grease (FOG) Commodity Economy

Fats, Oils & Grease

The renewable liquid feedstock biomass-based diesel industry is growing fast.

Used Cooking Oil

Used cooking oil is waste or spent cooking & frying oils collected from commercial food factories, restaurants, arena’s, casinos, schools, bakeries, etc. While the majority of used cooking oils are vegetable based, by no means should UCO be considered “waste vegetable oil” as there is inevitably some level of animal fat in UCO, which is naturally derived from the cooking process, and of course some restaurants cook in fats rather than oils.

Used Cooking Oil (ISCC-Certified)

International Sustainability & Carbon Certification (ISCC). ISCC is a globally leading certification system covering the entire supply chain and all kinds of biobased feedstocks and renewables. Independent third party certification ensures compliance with high ecological and social sustainability requirements, greenhouse gas emissions savings and traceability throughout the supply chain.Used cooking oil is waste or spent cooking & frying oils collected from commercial food factories, restaurants, arena’s, casinos, schools, bakeries, etc. While the majority of used cooking oils are vegetable based, by no means should UCO be considered “waste vegetable oil” as there is inevitably some level of animal fat in UCO, which is naturally derived from the cooking process, and of course some restaurants cook in fats rather than oils.

Yellow Grease – Animal Fat / Vegetable Oil Blends

Yellow Grease is a commodity produced in the United States, as well as other countries with established Rendering Industries, that is produced by a recognized rendering process and is typically comprised of used cooking oil and often contains rendered low quality animal fats such as tallow, poultry or lard. Generally yellow grease must meet the following specification: FFA max 15% and MIU 2%, often with 1% max water. MIU of 2% or below is commonly the maximum specification guaranteed by the renderer.

Trap Grease

Trap Grease is found in grease traps located at commercial foodservice operations (restaurants, hotels, hospitals, schools and prisons), Grease traps are also components of most domestic septic systems. It is made up of all elements expended through the sanitary sewer system during the course of daily business. Grease trap waste is a low-quality waste material with variable lipid content that is an untapped resource for producing biodiesel. Compared to conventional biodiesel feedstocks, this material requires different and additional processing steps for biodiesel production due to its heterogeneous composition, high acidity, and high sulfur content.

Brown Grease

Brown Grease is a commodity produced in the United States, as well as other countries with established Rendering Industries, that is produced by a recognized rendering process and is typically comprised of used cooking oil and often contains rendered low quality animal fats such as tallow, poultry or lard with higher Free Fatty Acids than a yellow grease which has a maximum of 15% Free Fatty Acid specification. Generally brown grease must meet the following specification: FFA minimum 16% and MIU 2%, often with 1% max water.

Choice White Grease

A specific grade of mostly pork fat defined by hardness, color, fatty acid content, moisture, insolubles, unsaponifiables and free fatty acids. Choice white grease specifications; TER Min o C 36.0, FFA 4, FAC max 13.11, R&B B, MIU 1%, moisture maximum 0.20%. Insoluble impurities maximum 0.05%, Lovibond color 5 1/4 inch cell – max 1.5 red. Lard peroxide value 4.0 meq/kg max.