Summary: N O T E S
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to Higher Value
As biodiesel production increases in response to federal and
state tax credits and mandates, more and more glycerol (a by-
product of biodiesel production) will be produced as well.
While glycerol (also known as glycerin) is a useful product
for the food and pharmaceutical industries, the glycerol that
results from biodiesel production is "crude" because it is
contaminated with methanol and other impurities. Crude
glycerol generally sells for less than 5
cents per pound if a buyer can be found.
Purifying the glycerol can be expensive.
Over the past decade, researchers
have tried to deal with the glut of
crude glycerol by experimenting with