Byproducts of Biodiesel are useful too

 

The biodiesel market has been dominated by Soy and Rapeseed in the United States and Europe, where the mandates and subsidies have encouraged the production. Here in Canada, canola oil is worth as much as biodiesel.  Given this situation production of biodiesel would be limited to special buy, or off grade product. 

Feed additive

Glycerol is a viscous, sweet liquid which has shown to be an aid in preventing segregation of diet components in a total mixed diet.

German researchers reported that glycerol can readily replace up to 10% of readily fermentable starches.  Glycerol’s energetic value when fed in conjunction with a starch-based diet was approximately 85% of its value when fed with a forage-based diet.

Crude glycerin is promising as a feed for finishing cattle, though much remains to be learned about optimal levels of feeding and implications for carcass quality, composition, and sensory attributes.

 

 

 

 

Dust suppression

Lazer Enterprises has used glycerol in testing dust suppression on aggregate roads in the Borden area.  In certain testing, during the week following an application, two hundred vehicles drove on treated road, without creation of significant dust.

Compared to the current practice of using just water to control road dust, applications with glycerin can retain effectiveness for a much longer period of time—on the order of weeks, rather than hours. Also, aqueous crude glycerin has a highly depressed freezing point, making it suitable for use at sub-freezing temperatures

 

References

Yan, W and Hoekman, K.  (2012).  Dust Suppression with Glycerin from Biodiesel Production: A Review.  Journal of Environmental Protection. 3, 218-224.

Stoytcheva M. and Montego, G. Eds. (2011).  Biodiesel - feedstocks and processing technologies. InTech: Rijeka, Croatia.

J. Anim. Sci. Vol. 86, E-Suppl. 2/J. Dairy Sci. Vol. 91, E-Suppl. 1