Crude Glycerin (industrial grade) is a byproduct primarily obtained from the biodiesel production process through the transesterification of fats and oils. Despite its lower purity, crude glycerin can be used in applications such as industrial chemicals, where high purity is not necessary. It is used in the production of antifreeze, as a carbon source in fermentation processes, and as a feedstock for other chemicals. After refining to remove harmful impurities, crude glycerin can be incorporated into animal feed as an energy supplement. Crude glycerin can be further refined into higher grades for use in pharmaceuticals, cosmetics, and food products.

Refined Glycerin (industrial grade) is a purified form of glycerin that is typically obtained after crude glycerin undergoes further refining processes. This refined product is characterized by higher purity levels (95% and above glycerol), making it suitable for a wide range of industrial applications. It is commonly used in the production of cosmetics, personal care products, pharmaceuticals, and various chemical formulations.

Residue of FAME End Distillation is the heavy byproduct that remains after the distillation of Fatty Acid Methyl Esters (FAME) during biodiesel production. This residue typically contains non-distillable compounds, such as heavier esters, unreacted feedstock oils, and impurities. While not suitable for high-purity biodiesel, it can be repurposed for other industrial applications, including use in lower-grade fuels, lubricants, or energy recovery processes. Its composition and potential applications vary depending on the feedstock and production methods used in the biodiesel manufacturing process.