Global energy consumption of fossil fuels which is expected to rise by about 177 quadrillion British thermal units (BTU). The scarcity of oil and fossil fuels along with the demand for energy needs can be overcome by switching to renewable and environmentally friendly energy. Biofuels can be an alternative energy and provide a clean green environment. Breadfruit peel waste is high in carbohydrates and sugar so have potential to be optimized into bioethanol. This research aims to determine the effect of variations in yeast mass and fermentation time on the bioethanol content of breadfruit rind through the distillation process. This study applies the fermentation method with variations (PI: 8 grams 72 hours), (P2: 10 grams 72 hours), (P3: 8 grams 96 hours), and (P4: 10 grams 96 hours). Then, the ethanol content was tested with Perkin Elmer Clarus 580 (GC) Perkin Elmer HS Turbo Matrix 40 (headspace sampler). The optimum results were found in the variation of yeast mass of 8 grams and fermentation time of 96 hours, with the resulting ethanol content of 339.8 mg/L at simplo and 338.08 mg/L at the time of duplication or an average of 338.94 mg/L.

Indonesia is a maritime country with two-thirds of its territory is the ocean. Indonesia has a diversity of marine resources with a total fish production continuing each year to reach 8.02 million tons. The traditional fishing vessel is one of transportation and livelihood support in Indonesia and the vessel was made based on the knowledge from generation to generation. Thus, the investigation of the fishing vessels must be conducted to measure the resistance profile and wave pattern. This analysis is conducted to consider the mono-hull fishing vessel design. The use of a numerical approach is rapid to predict the performance of ship design. The resistance analysis is investigated using Savitsky’s mathematical model and Holtrop’s regression method. Comparing studies is the main focus to describe the effectiveness of the methodology. The research will present the three variations of the hull for the mono-hull design. By comparing both methods, the best design makes the methods well enough to be used for resistance analysis, especially in the fishing vessel design.