The economic impact of the rendering industry is significant as the manufacture and trade in rendered products is an important component of the agricultural economy of the United States.
Some restaurants produce large volumes of used cooking grease. If the grease is improperly disposed of down the drain, there are costs to the city in damaged sewer lines and water treatment issues. Biodiesel production reduces the fossil fuel dependence and use. Rendered protein products can be used for fertilizer or as a soil conditioner, providing an alternative to chemical fertilizers. Rendering has a large economic benefit.