Abstract:
The gonggong snail are widely consumed as a part of culinary tour that is in demanded
by tourists. As a result, the waste of gonggong snail shells increases. Therefore, to reduce
its waste, the gonggong snails are used as a heterogeneous catalyst in making biodiesel
using used cooking oil as raw material. The shells of calcined gonggong snails are
calcined at a temperature of 900 °C, then impregnated with KOH, and then the catalyst
was calcined once again at 600 °C for 5 hours. The catalyst activity was tested studied
through a transesterification reaction with a oil:methanol mole ratio of 1:15 and 3% w/w
catalyst weight, at temperature of 60 °C, and stirring speed of 500 rpm for 3 hours. The
yield of CaO catalyst biodiesel from gonggong snail shells was 91,1801%. The
characterization of biodiesel produced in this study were water content of 0,018%,
specific gravity of 888 kg/m3, viscosity of 3,29 mm2/s, acid number 0,52 mh KOH/g,
number of lathering 388,05 mh KOH/g, number of iodine 54,71 g Iod/100g according to
SNI 7182-2015.
