Abstract
Ethyl ester or biodiesel that is an alternative energy because of its renewable nature. The production of ethyl ester involves an alcoholysis reaction between ethanol and triglycerides using a strong base catalyst. The source of triglycerides is derived from used frying oil to increase the economic value of used frying oil whose production in indonesia reaches 4 million tons/year. Used frying oil is taken from restaurants in Palembang, South Sumatra. It has free fatty acid values of 1.024% so that transesterification can be carried out directly using a strong KOH base catalyst. The research was conducted using an electrolysis reaction with NaCl as an electrolyte. Variations of made to the type of electrodes, namely aluminum and stainless steel, the reaction time was 3 hours; 3.5 hours; 4 hours; 4.5 hours; and 5 hours and the supplied current voltage which is 15 V; 25 V; 35 V to see the effect on the percent yield of ethyl ester produced. The highest percent yield of Ethyl Ester was obtained samples with a reaction time of 3.5 hours, a voltage of 35 V, and an aluminum electrode of 99.8%.
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