My research tells me only a small few companies wi

My research tells me only a small few companies will support mulitple feedstocks and not only native grasses, energy crops or cooking oils.

http://www.biodiesel.com/technologies/process-technology/

Multi-Feedstock Flexibility for Changing Markets
To maximize profitability, biodiesel plants must be able to respond to market fluctuations in the price and availability of various feedstocks, with the flexibility to quickly transition from one feedstock to another. We provide a robust and adaptable process technology to meet these goals. Other plant manufacturers claim “multi-feedstock capability,” but glaze over the critical details such as specifying which feedstocks are supported, in what proportions, and what are the resulting yields. Some companies will claim that used oils and greases can be used in their process, but they employ inappropriate process chemistry that can result in losses in efficiency that can exceed 30%. Pacific Biodiesel’s unique reaction technologies allow the use of up to 50% FFA feedstock without loss of yield. Our process is also designed to handle contaminants commonly found in used and unrefined oils and fats, but which competitors fail to mention as diminishing production factors.These include moisture, insoluble and inorganic impurities, excess unsaponifiable matter, and phospholipids. We have been processing used and unrefined oils and fats for more than a decade. No one provides more robust solutions for using multiple feedstocks to adapt to challenging market changes.