8.International Conference on Oleo and Petrochemical Engineering 2015

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Browsing 8.International Conference on Oleo and Petrochemical Engineering 2015 by Author "Ahmad, Adrianto"

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    Growth Kinetics of Microorganisms In Composting Processof Empty Fruit Bunch
    (2016-04-22) Legawati, Lisa; Ahmad, Adrianto; Helwani, Zuchra
    CPO production increased resulting in the amount of waste also increased, such as solid waste Empty Fruit Bunch (EFB). The composting process is one alternative method for reducing environmental pollution caused by waste EFB. However, the composting process takes a long time. Therefore, it is important to do a breakthrough to speed up the processing time. In this research, EFB composting process is done by adding a mixed culture that is useful as a starter and POME as a nutrition source. The purpose of this research was to determine the kinetic parameters of growth of microorganisms in the composting process Empty Fruit Bunch (EFB) as information on the scale-up bioreactor. Aerobic composting process takes place with variations in source of microorganisms, they are without the addition of mixed cultures; the addition of mixed cultures with a concentration of 60%; and the addition of mixed cultures 60% + POME. Stages of this researchare the preparation of a starter, substrate preparation, preparation windrow, and the composting process. operating conditions of the composting process are a moisture content of 40-60%, 30-50 0C temperature, and pH 6 to 8.5. The results showed that the reduction in C/N ratio in the composting process of EFB by adding POME faster in the amount of 19,77 on day 32 with a value of kinetic parameters are μmax 0.63 day-1, the value of yield 0,014, and Ks amounted to 32,32 g / L.
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    Growth Kinetics of Microorganisms On Fiber Solid Waste Composting Of Palm Oil Plant
    (2016-04-22) Firdha, Irena; Ahmad, Adrianto; Amri, Idral
    Solid waste of palm oil has increased along palm oil industry development in Indonesia. Solid waste palm oil mill is organic pollutants. One of it is fiber waste, if it not managed properly will pollute the environment. The purpose of this study was to examine the effect of mixed cultures on process of aerobic composting of palm fiber with windrow method. This research is treating three windrows with size 6 x 1 x 0.5 m3 each one without the addition of a starter, with the addition of starter and addition of starter and POME. The C/N ratio result of the research showed that 19,91 on composting without starter at days 34, 19,73 on composting with starter addition at days 32, and 16,93 at days 30 on composting with addition of starter and POME. Optimum composting is windrow with additing starter and POME. At this composting kinetic parameters are maximum growth rate (μmaks), máximum substrat consumption constanta (Ks), and yield coeficient (Y), continuously 0,73 day-1, 49,1 g/L, and 0,030.