Studi Pendahuluan Kadar Bioetanol Nira Nipah Dengan Penambahan Saccharomyces Cerevisiae

Abstract

Energy is a basic need of both developing and developed countries. The need for this energy is still supplied by most of the raw materials that are neither renewable nor environmentally friendly. The raw materials are coal and oil. Therefore, a new energy source that is renewable and environmentally friendly is needed, one of which is bioethanol. This research is a preliminary study to see the ability of Saccharomyces cerevisiae in converting nipa sap into bioethanol. The bioethanol obtained was analyzed for gum levels using a Brix refractometer and obtained a sugar concentration of 10%. Then as much as 5 liters of nipa sap added Saccharomyces cerevisiae with a concentration variation of 1%; 2.5%; 5%; 7.5% and 10%. The addition of nutrients in the form of urea and NPK was added to each variation in the concentration of Saccharomyces cerevisiae. The fermentation time was carried out for 4 days in the bioreactor. The highest decrease in sugar content in the bioreactor was found in 10% Saccharomyces cerevisiae as much as 87.1%, this also affected the increase in bioethanol up to 10% concentration.