HUBUNGAN ANTARA KADAR ETANOL, KADAR GULA REDUKSI DAN JUMLAH SEL DALAM PRODUKSI BIOETANOL DARI FERMENTASI AIR KELAPA DENGAN PENAMBAHAN PUPUK NPK

Abstract

Bioethanol is an energy source that can be obtained from the fermentation of plant material. This bioethanol
production utilizes coconut water as a fermentation medium thickened. The purpose of this study was to
determine the concentration of NPK fertilizer in the manufacture of bioethanol from coconut water by
Saccharomyces cerevisiae. This study with increasing the varying NPK fertilizer concentrations of this study
conducted an experiment with four treatments and measurement in duplicate. Concentration of NPK fertilizer
were N1 (0%), N2 (1%), N3 (2%) and N4 (3%). Observations were made every 24 hours; include ethanol
content, sugar content, pH, and the number of cells. Data were analyzed descriptively by using a tabulation
and graphs. The best treatment was a combination of N4 (NPK fertilizer 3%), which produces the largest
ethanol 9.50%.