The article does not mention what is done with the glycerin byproduct. For every gallon of biodiesel made, about a pound of crude glycerin is also produced. If refined and purified, as the volume produced increases, eventually it would adversely affect that market. What some small biodiesel producers (farmers mostly) in Canada do is to carefully feed it to their anaerobic digesters to produce methane. They buffer the rate at which glycerin is fed with manure or other lower strength materials or the digester goes sour and methane production stops.
Published by Eugene Smith
The article does not mention what is done with the glycerin byproduct. For every gallon of biodiesel made, about a pound of crude glycerin is also produced. If refined and purified, as the volume produced increases, eventually it would adversely affect that market. What some small biodiesel producers (farmers mostly) in Canada do is to carefully feed it to their anaerobic digesters to produce methane. They buffer the rate at which glycerin is fed with manure or other lower strength materials or the digester goes sour and methane production stops.