Darling International (NYSE:DAR) already stands tall as the nation's largest publicly traded rendering company, but Darling currently boasts another significant catalyst now that its two-years-in-the-making joint biodiesel venture with Valero (NYSE:VLO) is finally up and running, says Fool contributor Steve Symington in the following interview with the Fool's Alison Southwick.

Dubbed Diamond Green Diesel, the plant will be able to produce nearly two-thirds the number of gallons of biodiesel as the combined total of all seven of the plants owned by the United States' current biodiesel leader, Renewable Energy Group (NASDAQ:REGI).

But what do you think? Does the new Diamond Green Diesel operation make Darling International a buy? Watch the video to get Steve's full take, and then weigh in using the comments section below.

Alison Southwick and Fool contributor Steve Symington have no position in any stocks mentioned. The Motley Fool recommends and owns shares of Darling International. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.