Browsing by Author "Peratenta Maria"

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    Fermentasi Nira Nipah Kental Menjadi Bioetanol Menggunakan Saccharomices Cerevisiae
    (2013-05-27) Yuanita, Helnanda; Chairul; Peratenta Maria
    Energy is of particular concern because of the increasingly limited availability so encouraged to find alternative energy. Which has great potential in the new and renewable energy sources are palm sap. Availability of land large enough palm in Indonesia as well as a fairly high sugar content (15-20%) making palm sap is a potential to be processed into bioethanol. Through the process of fermentation using yeast Saccharomices cerevisiae, glucose is converted into ethanol. Fermentation takes place in batches with a volume of 150 ml fermentation medium and the volume of 15% with a variation starter fermentation time 12, 24, 36, 48, 60, 72, 84 and 96 hours and viscosity variations palm sap fifth evaporation, 2/5 evaporation and 3/5 of evaporation. Initial fermentation medium acidity at pH 5 and a temperature of fermentation at room temperature. Ethanol concentration was analyzed by using alkoholmeter. The fermentation process is shown in optimum viscosity 3/5 evaporation and fermentation time of 48 hours with ethanol concentration obtained was 94.716 mg / ml.
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    PENGARUH VARIASI pH PADA PEMBUATAN BIOETANOL DARI PATI SORGUM DENGAN PROSES SAKARIFIKASI DAN FERMENTASI SERENTAK
    (2013-04-29) Yuni; Chairul; Peratenta Maria
    Sorghum starch high potential as raw materials for bioethanol production. Sorghum starch consists of amylose 20-30% and amilopektin 70-80%. Bioethanol manufacturing done sakarifikasi and fermentation processes simultaneously (SSF) using enzyme StargenTM 002 and yeast Saccharomycess Cereviciae with varying degrees of acidity (pH) of 4, 4.5 and 5, and fermentation time 12, 24, 48, and 72 hours. Analysis sugar using a spectrophotometer and the remaining bioethanol analysis using Alkoholmeter. The results showed the highest bioethanol concentration at pH 4.5 and the best fermentation time at 48 hours at 5% v /v.
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    Variasi Konsentrasi Substrat Pati Sorgum Menjadi Bioetanol dengan Proses Sakarifikasi dan Fermentasi Serentak Menggunakan Enzim StargenTM 002 Dan Yeast Saccharomyces Cerevisiae
    (2013-04-29) Azizah; Chairul; Peratenta Maria
    Sorghum is one of the agricultural commodities used for biofuels. Sorghum is a resource of grain yield 55-75% starch composition similar to corn, which is potetianlly as raw material for production of bioethanol. Research based sorghum bioethanol manufacture carried out using enzymes stargenTM 002 and starch raw materials. The purpose of this study was to determine the concentration of substrate and the best time of fermentation to produce bioethanol. The research method consists of hydrolysis and saccharification processes are aided by enzymes stargenTM 002 followed by a fermentation process using yeast Saccaromyces Cerevisiaee , ferment at room temperature, pH 4.5, enzymes stargenTM 002 concentration 2,% and distilled at a tempaerature 78 -800C. variable substrate concentration used were 30 g/l; 40 g/l; 50 g/l; and 60 g/l and time of fermentation were 12; 24; 48 and 72 hours. The result indicate that the substrate concentration 0f 30 g/l and the optimum time is 48 hours can produce the higest bioethanol concentration of 6% (v/v).