Open AccessPurification of Used Cooking Oil by Alkali Neutralization and Bleaching of Bayah Natural Zeolite
Author(s) -
Endang Su hendi,
Rusdi Rusdi,
Bagja Nur Alam,
Siti Nani Nurbaeti
Publication year - 2021
Publication title -
jurnal bahan alam terbarukan /jurnal bahan alam terbarukan
Language(s) - English
Resource type - Journals
eISSN - 2407-2370
pISSN - 2303-0623
DOI - 10.15294/jbat.v10i1.28636
Subject(s) - zeolite , acid value , sodium hydroxide , cooking oil , adsorption , chemistry , alkali metal , peroxide value , neutralization , hydrolysis , peroxide , pulp and paper industry , waste management , organic chemistry , catalysis , biodiesel , biochemistry , antibody , engineering , immunology , biology
Cooking oil that is used repeatedly at high temperatures will reduce the quality of cooking oil. This will trigger the hydrolysis and oxidation processes that will change the characteristics of the oil, such as an increase in free fatty acid levels and peroxide numbers. Purification of used cooking oil can be carried out physically and chemically. The physical purification of oil is carried out by using adsorbents, while chemically purification process is carried out with an alkaline solution. Physically, natural materials such as zeolite can be used, where zeolite is a natural rock or mineral which chemically has a large surface area to be used in the adsorption process. Chemically with alkaline solution you can use sodium hydroxide (NaOH). In this study, used cooking oil is purified by three stages of the process, namely despicing, neutralization and bleaching to comply with the SNI quality standards. The purpose of this study was to determine the optimum operating conditions for the purification of used cooking oil in accordance with the quality standards for cooking oil. based on the results obtained by adding a NaOH concentration of 19% in the neutralization process and a zeolite concentration of 90% can reduce the acid number value of 2.4 mg NaOH/gr, the peroxide number is 7 mekO2/kg, the color degradation of used cooking oil is 51.83%.