Crude Glycerol May Fit in Lactation Diets: Use caution when feeding this byproduct of biodiesel production

摘要

Initial research conducted at the University of Minnesota indicates crude glycerol can be used to supply energy in lactating sow diets. However, producers need to pay close attention not only to how the glycerol has been handled, but also to salt concentration and methanol content when determining if the ingredient is practical for feeding on a regular basis. Glycerol is a liquid byproduct of the biodiesel refining process. During biodiesel production, 100 Ib. of a fat source, such as soybean oil, iscombined with 10 Ib. of methanol plus a catalyst, such as sodium hydroxide or potassium hydroxide. The reaction produces 100 Ib. of biodiesel and 10 Ib. of crude glycerol. Hydrochloric acid is added to neutralize the catalyst remaining in the crude glycerol.