PEMANFAATAN ARANG AKTIF DARI SERBUK GERGAJI KAYU ULIN UNTUK MENINGKATKAN KUALITAS MINYAK GORENG BEKAS

This research conducted to investigate the ability of activated carbon from sawdust ulin wood for waste cooking oil adsorption and to get the best adsorption time from the used time range in this research. Activated carbon was gotten by carbonizing sawdust before activated it with 0.1 N ZnCl2. This activated carbon was used in adsorption waste cooking oil with weight variation of 5,10 and 15 gram that put into shaker for 40, 60 and 80 minute adsorption. After being filtered, this proceeded waste cooking oil would be analyzed in order to measure acid number, peroxide number and saponification number. As the result, the best dose for adsorption regarding SNI 01- 3741-2002 standard was 15 gram activated carbon in 80 minute adsorption which gave acid number was 0,224 mgKOH/gram, peroxide number was 10 mg eq/gram while the best dose to get saponification number that meet SNI 01- 3741-2002 standard was 10 gram in 40 minute adsorption which gave 200,09 mg KOH/gram.