抄録
Trap grease, so called brown grease, is the grease collected in sewage interceptor at eating places. In contrast to yellow grease usually recycled for animal feed, soaps, cosmetics, and boiler fuels, most trap grease has been treated at waste incinerators or dumped in landfill. However, BDF production from trap grease can give considerable merits not only in terms of the supply of inexpensive BDF feedstock, but also waste reduction itself. However, its low quality for BDF production is still a matter of concern, e.g., higher content of fatty acid and moisture. Moreover, it is probable that serious contamination can be occurred by various unknown compounds in wastewater, and it raises another obstacle for the usage of trap grease. To design the optimal BDF manufacturing process from trap grease and evaluate its feasibility, it is important to understand its characteristics with respect to the content of mono-, di- and tri-acylglycerols as the target compounds for transesterification reaction, as well as to guarantee its good quality and environmental safety. In this work, it was determined major lipids components of trap greases from the restaurants in Japan and identified their potential contaminants.
