<![CDATA[Public consumption of fuel that far exceeds domestic production capacity further exacerbates the energy crisis and environmental impact. On the other hand, food loss is urgent, causing not only economic losses but also contributing significantly to food insecurity and greenhouse gas emissions. The use of food waste as bioethanol can open up and provide environmentally friendly energy solutions. However, manual fermentation of bioethanol often encounters obstacles in the form of unstable temperatures and pH levels, resulting in low ethanol yields. This study aims to develop a microcontroller-based mini fermentation reactor to improve the bioethanol production process from food waste. It focuses on controlling temperature and pH, which are the main factors for successful fermentation. The research method used is qualitative descriptive. The tests included: Fermentation Temperature Test, Fermentation pH Test, FTIR analysis, and Equipment Performance Test. The reactor test results showed that The DS18B20 sensor is capable of detecting temperatures of 30–35°C, the 4502C pH sensor detects pH 4.5–5.5, the 16x2 LCD displays pH and temperature values. FTIR analysis confirmed the presence of alcohol functional groups characteristic of bioethanol.]]>
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