Uji kinerja alat konverter air kelapa menjadi bioetanol

Charolina Rehulina Depari; Muhammad Yerizam

Authors

Charolina Rehulina Depari Politeknik Negeri Sriwijaya Author
Muhammad Yerizam Politeknik Negeri Sriwijaya Author

Keywords:

Bioethanol, air kelapa, Fermentasi Anaerob, distilasi, Energi terbarukan

Abstract

The global energy crisis caused by dependence on fossil fuels has encouraged the use of biomass as a renewable energy source. Coconut water, abundant as agro-industrial waste in Indonesia, has strong potential to be converted into bioethanol. This study aims to design and evaluate a conversion device that processes coconut water into bioethanol through fermentation and distillation. The device consists of a 5.5 L fermentor, a 5 L distillation unit, and a copper-based condenser. Fermentation using Saccharomyces cerevisiae was carried out for 72 hours at ±30°C, followed by a two-stage distillation at 78–80°C. From 4.9 L of coconut water, 250 mL of distillate was obtained with an ethanol concentration of 57% v/v, confirmed by Gas Chromatography analysis. Mass balance indicated that 171.5 g of glucose produced 112.5 g of ethanol, with a fermentation efficiency of 128.3%. The system’s thermal efficiency reached 67.77%, while distillation and condenser efficiencies exceeded 95% and 97%, respectively. Although ethanol concentration has not yet met SNI 7390:2012 standards (≥94% v/v), the device shows strong potential as a renewable energy solution at the laboratory scale and for small-scale industry applications.

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