This paper describes the fundamental study about utilization of co-glycerol derived from biodiesel fuel (BDF) production especially exhausted from small BDF plant which has no facility to dispose them by themselves. The method to add value to this co-glycerol is refining and production of pyrolysis oil under low temperature around 500 °C, using small solar thermal collector (STC) with type of parabola trough as its heat source. This paper especially focuses in the usage of refined glycerol as blended fuel in BDF by solketalization with acetone, which could be prepared from biomass fermentation. Here, reaction conditions such as a specie of catalyst, an amount of acetone was fundamentally studied, then high yield of solketal was achieved when high amount of acetone was used in any catalyst of montmorillonite and Fe(NO3)3･9H2O, and solketal was also synthesized from purified glycerol derived from co-glycerol from BDF production.
