I'd like to hear a bit more detail on how the coffee grounds get to the refinery

Waste Coffee Grounds Offer New Source Of Biodiesel Fuel

ScienceDaily (Dec. 15, 2008) — Researchers in Nevada are reporting that waste coffee grounds can provide a cheap, abundant, and environmentally friendly source of biodiesel fuel for powering cars and trucks.
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The scientists estimated, however, that spent coffee grounds can potentially add 340 million gallons of biodiesel to the world's fuel supply.
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The scientists estimate that the process could make a profit of more than $8 million a year in the U.S. alone.