Abstract:
This research aims to determine the effectiveness of activated charcoal the bark leather as an adsorbent in purifying used cooking oil. The research methods include the manufacture of activated charcoal from leather bark, analysis of quality activated charcoal bark leather, refining of used cooking oil, quality analysis of cooking oil results of purification. In this study observed several variables that will affect the adsorption process is the weight ratio of activated charcoal with used cooking oil, the effect of temperature and time adsorption used cooking oil with the adsorbent bark leather. Bark leather adsorbent surface characteristics were analyzed with SEM. The results of the analysis of activated charcoal bark leather is yield 66.35%, 10% moisture content and ash content of 20%. The purification process used cooking oil by activated charcoal bark leather is affected by temperature and contact time adsorbent with the cooking oil. The higher temperature adsorption, cooking oil quality obtained the better, which is characterized by a decrease in water content, free fatty acid value, peroxide number and decrease in turbidity. Effectiveness purification of used cooking oil with activated charcoal adsorbent bark leather, is achieved at a temperature of 100 °C and a contact time of 80 minutes, with the quality is 0.15% water content, acid number 0.64%, and 5.06 NTU turbidity value.
