Biofuels are a renewable and clean alternative to keep upwith the increasing demand for energy. Biodiesel stands
out among biofuels, but its production yields crude glycerin [CGL] as a result of the transesterification process.
The increased availability and lowcost of CGL encourage the assessment of digestibility of glycerin as dietary energy
source, and growth, hematological parameters and carcass composition of Nile tilapia fed diets containing
crude glycerin.