After a slow start, the biodiesel industry ended 2011 with what’s expected to be record high production. While December numbers were not available at press time, the year-end total for biomass-based biodiesel was expected to reach the one-billion-gallon mark. And biodiesel makes up about 95% of the biomass-based diesel category.

Renewable Energy Group - Headquartered in Ames, Iowa, this company produced 212 mmgy in six plants. See www.REGI.com.

ADM - This company produced 145 mmgy in three product plants. It is headquartered in Decatur, Ill. Visit www.adm.com.

Ag Environmental Products - A subsidiary of Ag Processing, Inc., Ag Environmental Products is headquartered in Omaha, Neb. No production figures were available.

Louis Dreyfus Corp - Headquartered in Claypool, Ind., Louis Dreyfus produced 90 mmgy in one plant. Visit www.ldcom.com.

RBF Port Neches - This Houston, Texas-based company produced 55 mmgy in one plant. Visit www.rbfuels.com.