| Abstrakt: |
This study was conducted to analyze the potential of producing bioethanol from sunflower stalks with the optimized pretreatment models on total sugar production from sunflower stalk (SS) utilization to decompose the lignocellulosic biomass to sugar. The accumulation variables were examined in the pretreatment model, including pretreatment temperature (30, 35, and 40 °C), NaOH concentration (1, 1.5, and 2%), and duration (1, 2, and 3 days). Total sugar production was optimized using response surface methodology (RSM) on central composite design (CCD) models. In addition, the economic strategy was carried out. It was found that sunflower stalks have properties that can be used to produce bioethanol. One kilogram of dried sunflower stalks containing 8.398 g of ethanol at 8% purity can be distilled. Economic feasibility and sensitivity analysis of the project showed that the economic net present value is about 31,875 US $ cost and benefit ratio equal 1.11, and the internal rate of return is about 10%. This investment feasibility assessment is for the dried chopped agricultural waste processing plants, and its output will be used as a raw material for ethanol production, which is worthwhile and could return the capital within 8 years. However, this project needs support from the public and private sectors, and the state may have a policy of paying subsidies to bioethanol producers to increase interest in the use of dried chopped agricultural waste. This will allow for the development of the local economy and provide an alternative way to select raw materials for bioethanol production. [ABSTRACT FROM AUTHOR] |
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