#TITLE_ALTERNATIVE#

• Main Author: YUDI WAHYUDI (NIM 25397001), M.
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13697
• Institution: Institut Teknologi Bandung

ABSTRACT: <br /> <br /> <br /> <br /> <br /> Spent bleaching earth is a side product from refining process of CPO. The refining of CPO is one of the processes in frying oil industry. According to Government Policy No. 18, 1999, spent bleaching earth is categorised into hazardous waste (B3). The reuse of spent bleaching earth can be conducted by activation. This process will produce adsorbent may be used in refining process of CPO. It is expected to reduce the waste and cost production of frying oil industry. The activation of spent bleaching earth was conducted by heating and adding phosphoric acid (H3P(c)4). Spent bleaching earth consists of fresh bleaching earth and hydrocarbon of CPO. The heating can decomposed the hydrocarbon into deposit coke. The coke of adsorbent will have an active surface with phosphoric acid treatment. The activation of spent bleaching earth was conducted in 300-700 degree C with phosphoric acid 0-3%. The activation has optimal condition in temperature of 400 degree C with phosphoric acid 2%. The reuse is expected to occur not only once but repeatable. The first reuse, adsorbent can adsorb methylen blue 0,097 g/g. This ability increases to the eighth reuse where it reaches 0,224 g/g. As comparison, fresh bleaching earth can adsorb methylen blue is 0,034 g/g. The increasing of methylen blue adsorption is caused by coke. Coke in adsorbent measured with fixed carbon analysis. In the first reuse, adsorbent has fixed carbon 11%. Adsorbent from the eighth reuse has fixed carbon 51%. Fresh bleaching earth has not fixed carbon. Process adsorption of colour in CPO shows that for colour removal as much as 50%, consumption of fresh bleaching earth is 2,16%. If the process makes use of adsorbent from the reuse, then in the first. reuse, adsorbent consumption is 1,96%. The consumption adsorbent in the eighth reuse is 1,37%. Cost production analysis based on the capacity of CPO refining which is 200 ton/day shows that the reuse may save up to 89,4% from the cost processing without reuse. Besides, reuse process can eliminate the spent adsorbent as much as 91,06% per year.