Value-added uses for crude glycerol--a byproduct of biodiesel production

TLDR

Biodiesel production generates large amounts of crude glycerol, and its effective utilization is essential for the economic viability of biodiesel. This review examines the composition, quality factors, and value‑added utilization opportunities of crude glycerol. The authors analyze crude glycerol’s composition and quality, and assess its potential value‑added applications.

Abstract

Biodiesel is a promising alternative, and renewable, fuel. As its production increases, so does production of the principle co-product, crude glycerol. The effective utilization of crude glycerol will contribute to the viability of biodiesel. In this review, composition and quality factors of crude glycerol are discussed. The value-added utilization opportunities of crude glycerol are reviewed. The majority of crude glycerol is used as feedstock for production of other value-added chemicals, followed by animal feeds.