الوصف

Glycerol (also known as glycerin) is a major byproduct in the biodiesel manufacturing process. In general, for every **0 pounds of biodiesel produced, approximately *0 pounds of crude glycerol are created. As the biodiesel industry is rapidly expanding, a glut of crude glycerol is being created. Because this glycerol is expensive to purify for use in the food, pharmaceutical, or cosmetics industries, biodiesel producers must seek alternative methods for its disposal. Various methods for disposal and utilization of this crude glycerol have been attempted, including combustion, composting, anaerobic digestion, animal feeds, and thermochemical/biological conversions to value-added products. The objective of this article is to provide a general background in terms of waste glycerol utilization.