PEMANFAATAN BIJI ALPUKAT (persea americana) MENJADI BIODIESEL SEBAGAI BAHAN BAKAR ALTERNATIF (BBA)

Biodiesel is made by extracting the avocado seeds oil by extraction process then undergo through two stages of esterification and transesterification with the solvent to oil ratio between 1:1, until 1:5 and catalyst added to the esterification process was H2SO4 and transesterification was NaOH. During the estrification process, acid catalyst was added with different concentration 0,5% until 0,9% to the avocado seeds oil and during the transeterification, the base catalyst was added at a concentration of 0,5% until 0,9% to the result of esterification. Operation condition is maintained at a temperature of 60oC, processing time for 60 minutes and separation time of 3 hours. Biodiesel products that fulfilled the Indonesian National Standard was the composition of ratio between avocado seeds oil dan methanol 1:1 with the catalyst concentration used 0,5% with the quality analysis of density which was 0,8868 gr/ml, pH 7,17, water level 0,1128%, refractive index 1,3357 and calorific value 8377 kal/gr