What is the by-product of making biodiesel?
The by-product of making biodiesel is Glycerin; it is typically a dark substance that will solidify over time. You can compost excess glycerin by-product — it is non-toxic and biodegrades quickly. It will need to be mixed thoroughly with other materials so that the air and bacteria can get at it, or it will just make a sticky mass — mix thoroughly with dry, “brown” materials, use in conjunction with other composting materials as only a part of the overall mix. We also offer compost tumblers on our web-site to help you turn your glycerin into potting soil.