Biodiesel (methyl ester) produced from trans esterification of waste cooking oil is a potential material toÂ replace diesel fuel. The biodiesel can be obtained by using electrostatic method equipped with fixed distanceÂ electrode 1.5 cm and voltage at 12 volts. Coagulation of particle process i.e. glycerin drops in biodieselglycerinmixture was based on electrical field. Reactants used were methanol over KOH catalyst andÂ temperature was set at 60 ï°C. The residence time was varied as well as methanol to waste cooking oil ratio.Â Analysis result shows the process was able to obtain yield up to 83.3%. The quality of biodiesel produced wasÂ tested and satisfy the requirement according to National Standard of Indonesia (SNI), i.e. density 0.8594Â mg/mL (compared to SNI: 0.85-0.90 mg/mL), flash point 191 ï°C (SNI min 100 ï°C), water content 0.0342%Â (SNI max 0.05%) and viscosity at lower limit 2.31 cSt. According to SNI 7182-2015 the above value meets theÂ specified standard.
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