OPTIMIZATION OF MECHANICAL CALOPHYLLUM OIL EXTRACTION USING FLEXIBLE SINGLE SCREW EXTRUDER FOR BIOFUEL IN OUTER ISLANDS

• Main Author: - NIM: 23115011, HERIAWAN
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22430
• Institution: Institut Teknologi Bandung

A flexible single screw extruder has been successfully designed and manufactured with characteristics including a blockage mechanism at the outlet of cakes using a reverse screw or forward screw with adjustable pitch width, an oil filtration mechanism using a borehole type on the filter barrel, a screw-type segments were straight screw, screw system can be disassembled, equipped with measuring instrument of screw rotating speed, measuring instrument of heating temperature of filter barrel, and bearing system that integrates with locking configuration. The highest oil yield (53,10% based on dried bases) was achieved in the test with T66/F16/I41/I41/I41/I41/F16/F10 configurations, filter barrel type 2 (627 holes), at 25 rpm rotating speed, 75oC barrel temperature, 5 kg/jam seed rate, 5,53% moisture content, and filtrate filtration using vacuum filtration. The physicochemical characteristics of nyamplung oil after purification including acid number, saponification number, and iodine number have met the Ministry of Energy and Mineral Resources Standard, while the viscosity is not yet eligible. Thus, nyamplung oil can be used as a fuel for diesel engines in outer islands if purified first and by adding a preheater on a diesel engine to decrease the viscosity.