Browsing by Author "BILISE WAKTOLE"

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    BIO-ETHANOL PRODUCTION FROM MANGO PEEL WASTE AND ITS CHARACTERIZATION
    (WOLKITE UNIVERSITY, 2021-08) TOLCHA ADUGNA; BILISE WAKTOLE; EBA TESFAYE; DERARTU BIRHANU; REHIMA FUAD
    Waste disposal has become one of the major concerns in country city and fruit peels are one of the major solid by-product. This project is aimed at utilizing the mango peel forth production of bio-ethanol by using yeast saccharomyces crevasse. The dry mango peel consists cellulose and hemicelluloses, which make it suitable as fermentation substrate when hydrolyze. This mango peel contains fermentable sugar, which is extracted from mango peel by the method of enzyme hydrolysis, simultaneous saccharafication and fermentation. The mango peel was collected and then wash by water. After it washed it is dried by sun for two days and in oven (101°C for 3hours) for further drying and to obtain easily crushable material, the 100gm of dried sample is grinded to the size of 2mm, then mixed with water in the ratio of 1:10 after that it pass through pretreatment, acid hydrolysis, fermentation and distillation in order to produce bio ethanol and from 100gm of mango peel powder 58mL of ethanol is produced. The result obtained checked and characterized by chromic acid test, which convert the color of the chromic from orange-red to green color, it indicate that the result is bio-ethanol. The density (0.85134g/m3), and refractive index(1.3335) are determined to characterize the obtained result, which shows the properties of bio-ethanol. The analysis on the technical and economic feasibility of the work for ethanol production is performed. Results from the feasibility study indicated that the proposed work was feasible with internal rate of return (IRR) 12%, NPV (2,990,205.7) and the payback period of the project is estimated to be 2 years.