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Biodiesel refinery celebrates expansion that makes it largest of its kind in Western U.S.

A clean-energy project two years and more than $40 million in the making got a proper christening Thursday as Denver-based Crimson Renewable Energy Holdings LLC celebrated an expansion that cements its position as the largest producer of ultra-low carbon biodiesel in the Western United States.

The company's 11-year-old biodiesel plant along Millux Road a half-hour south and west of Bakersfield can now process an extra 13.3 million gallons per year of biodiesel made primarily from recycled cooking oil, trap grease and rendered animal fats. Its total capacity is now close to 50 million gallons per year, or about 3,300 barrels daily.