Open AccessRecycling Solid Waste of Coconut Oil Industry: A Response Surface-Goal Programming Approach
Author(s) -
Dwi Agustin Nuriani Sirodj,
Ivan Gunawan
Publication year - 2020
Publication title -
jurnal optimasi sistem industri
Language(s) - English
Resource type - Journals
eISSN - 2442-8795
pISSN - 2088-4842
DOI - 10.25077/josi.v19.n2.p111-121.2020
Subject(s) - response surface methodology , peroxide value , process (computing) , quality (philosophy) , pulp and paper industry , environmental science , process engineering , waste management , biochemical engineering , computer science , chemistry , food science , engineering , chromatography , philosophy , epistemology , operating system
Waste minimization is a key success factor to achieve sustainability, including in the edible oil industry. One type of solid waste produced substantially in this industry is spent bleaching earth (SBE), which comes from a mixture of bleaching earth (BE) and activated carbon (CA) used in the edible oil refining process. SBE that is recycled through a heating process is known as heat regenerated SBE (HRSBE). The process is influenced by two factors as stated in previous studies: temperature and time. In the current study, we report the results of experiments to find the optimal combination of temperature and time in restoring the absorbent quality of SBE by observing four quality parameters: colors (red and yellow), Free Fatty Acid (FFA), and Peroxide Value (PV). The current study uses Response Surface Methodology (RSM) to design the experiments and to find the equations of the relationship between the factors for each response; as well as Goal Programming (GP) to find the most optimal combination of factors in order to achieve aggregated quality targets. The findings show that 3.414 hours of heating at a temperature of 151.64oC allow HRSBE to produce coconut oil in accordance with the expected quality targets.