PENGARUH KONSENTRASI GLUKOSA TERHADAP BIOKONVERSI REJECT NANAS MENJADI BIOETANOL

Abstract

Bioethanol can be produced by fermentation of materials containing starch, glucose and cellulose fibers. This research tried to produce bioethanol from pineapple reject which is material containing glucose. The purpose of this research was to determine the influence 0/ glucose concentration on the acquisition of ethanol and to obtain the optimum glucose concemration for the production of bioethanol from pineapple reject raw materials. Bioethanol production consists of several stages, namely preparation of raw materials; fermentation and purification products. Variahles for the research is the concentration of glucose: 13%, 14%, i5%, 16% and 17% by fermentation time l2. 14, 36, 48, 60, 72, 84, 96, J08, and J20 hours. Anaerobic fermentation process tokes place at pH 4.5 by using Saccharomyces cerevisiae which will outline the glucose into ethanol Added nutrients are urea and NPK respectively 0.5% and 0.06% of the volume of fermentation medium. The FeSUitsshowed that the highest ethanol content of 17% and the highest yield of 11.33% is obtained at a concentration of J6% gluoose with 7.34 gIL cell dry within 84 hours of fermentation.