This is inside Organic Valley/CROPP Cooperative's on-farm biodiesel trailer. At the heart of the operation is a Kern Kraft KK40 cold-extraction screw press. The German-made machine separates the seed into oil and meal while never exceeding 100 degrees. In 24 hours the press can process 2,100 pounds of seed. In camelina's case, it makes about 1,200 pounds of protein meal and 100 gallons of oil. The variable speed transmission helps keep electricity costs at $3.84 per day. Arkansas Bio-Fuels Enterprises LLC uses an 8.8hp Changfa diesel that runs on straight vegetable oil (SVO) to drive its press. As a side note, large-scale vegetable oil producers use hexane to chemically extract the oil.