Abstract
Crude glycerol, a byproduct of biodiesel fuel, BDF, was treated simply using dilution and neutralization. Then it was kept statically to separate an upper layer of oil from a lower layer of glycerol solution. The two layers were collected separately and were examined following recycle usage : the oil and the glycerol solution were used respectively as a fuel and denitrification reagent. Results obtained from laboratory experiments demonstrated that the oil contained small amounts of ash and water. The caloric content was almost equal to that of virgin edible oil. The denitrification efficiency and the biodegradability of the glycerol solution examined in the activated sludge of excreta treatment were almost equal to those of a 50 % methanol solution. Moreover, the glycerol solution, which was produced in a two cubic meter vessel assembled in an actual scale refining apparatus that showed identical results to those obtained from laboratory experiments, was available for use at an excreta treatment facility as a denitrification reagent.
