Contextual Learning of Bioethanol: Effect of NPK and Urea Application on Production from Pineapple Waste

Abstract

The global energy crisis drives the search for environmentally friendly renewable energy sources, one of which is bioethanol. This research aims to determine the effect of NPK and urea on bioethanol production. The method used research is experimental method, The production process includes the hydrolysis stage using 5% HCl, fermentation for 7 days with Saccharomyces cerevisiae, purificationthrough distillation, measure alcohol content using an alcohol meter. Variations of materials such as pineapple peels, pineapple leaves, and a combination of both, as well as the influence of nutrient addition during the fermentation process, by adding nutrients in the form of NPK, Urea, and a combination of both. The research results show that pineapple peels treated with urea produced the highest alcohol content at 17%. Pineapple leaves showed the highest yield at 5%. in the treatment, the combination of pineapple skin and leaves showed the highest content of 8% in the single NPK treatment. The use of pineapple peels is more effective than pineapple leaves. application of nutrients, especially NPK, has been proven to enhance fermentation efficiency, particularly on more complex substrates. This research shows that NPK and urea have an influence on the production of bioethanol from pineapple peels and leaves.