America’s Largest Renewable Diesel Plant

Diamond Green Diesel (DGD) is a joint venture between Valero Energy Corporation (through a subsidiary) and Darling Ingredients Inc. DGD is the largest renewable producer in North America and the second-largest in the world.

The fuel produced at our facility reduces greenhouse gas emissions by up to 80% compared with traditional diesel fuel.

DGD currently produces 290 million gallons per year, with construction underway on an adjacent site that will expand production to 690 million gallons annually. This expansion is scheduled to be complete in 2021. Valero and Darling continue to pursue growth in the low-carbon renewable diesel business, and have approved a new 470 million gallons per year renewable diesel plant near Valero's Port Arthur, Texas refinery. Operations are expected to begin n 2023, increasing Diamond Green Diesel's total production to approximately 1.2 billion gallons of renewable diesel. 

Our renewable diesel is produced from sustainable low-carbon feedstocks, such as used cooking oil, inedible animal fats derived from processing meat fats and fuel-grade corn oil. Darling processes 10% of the world’s inedible meat by-products and is the largest collector and processor of used cooking oil in North America. Valero is America's largest renewable fuels (ethanol and renewable diesel) producer.

In addition to this integrated supply chain, both Darling and Valero bring expertise to the operation of Diamond Green Diesel. Darling has extensive experience in pretreating the feedstocks for further processing, and Valero has extensive experience in converting the pretreated feedstock to renewable diesel and marketing transportation fuels to the marketplace.

This combination of an integrated feedstock supply, and rendering and refining expertise, is unique in the renewable diesel industry with the efficient production of a superior low-carbon fuel, Diamond Green Diesel.

North America’s largest biomass-based diesel plant

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2.3 Billion

pounds of rendered and recycled materials converted.

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290 Million

gallons per year of renewable diesel production.

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Up to 80%

of life cycle greenhouse gas emissions reduced.

Environmental Leadership

The renewable fuel meets the most stringent low-carbon fuel standards. It is primarily sold into the large California on-road diesel fuel market to comply with the state’s Low Carbon Fuel Standard. We also sell significant volumes to Canadian and European customers, to comply with their respective low-carbon fuel requirements.

Our Integrated Partnership

  • Valero

    Valero Energy Corporation, through its subsidiaries (collectively, “Valero”), is an international manufacturer and marketer of transportation fuels and petrochemical products. Valero is a Fortune 50 company based in San Antonio, Texas, and it operates 15 petroleum refineries with a combined throughput capacity of approximately 3.2 million barrels per day and 13 ethanol plants with a combined production capacity of 1.72 billion gallons per year.

    Approximately 7,000 fuel stations and outlets carry Valero's family of brands. 

    Visit us at

  • Darling Ingredients

    Darling Ingredients Inc. is a global developer and producer of sustainable natural ingredients from edible and inedible bio-nutrients, creating a wide range of ingredients and customized specialty solutions for customers in the pharmaceutical, nutraceutical, food, pet food, feed, industrial, fuel, bioenergy and fertilizer industries. 

    With operations on five continents, the company collects and transforms all aspects of animal by-product streams into commercial and specialty ingredients; recovers and coverts recycled oils (used cooking oil and animal fats) into valuable feed and fuel ingredients; collects and processes residual bakery products into feed ingredients; and provides environmental services, such as grease trap collection and disposal services to food industry establishments.

    Visit us at

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