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One industry group, the National Renderers Association, estimates that 190 million pounds of used cooking oil — about 25 million gallons — is stolen each year. For comparison, the Exxon Valdez spilled about 11 million gallons of crude oil into Alaska’s Prince William Sound.
Canola oil bubbles and sizzles at 350 degrees for a week before a restaurant dumps it into a bin and lugs it outside. Bacon grease and charbroiled burger fat are scraped in as well. Workers then cook it and spin it through a centrifuge at 40,000 revolutions per minute to remove the solids. Recyclers sell the cleaned-up grease as an ingredient in livestock feed or for biodiesel production. (Wash Post, 6/26/2012)
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