Browsing by Author "Fermi, Muhammad Iwan"

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    The Effect Of Initial Concentration And Ph Of Wastewater In Ammonia Removal Using Membrane Contactor In Counter-Current Mode
    (2016-04-22) Fermi, Muhammad Iwan; Muharam, Yuswan; Kartohardjono, Sutrasno
    This study shows the application of hollow fiber membrane contactor (HFMC) for ammonia removal from its solution using super hydrofobic polypropilene membrane. In this study, the waste water solution was flow in shell side while the absorbent solution in lumen fiber side in counter-current mode. Sulfuric acid (98% v/v) was used as abosrbent fluid. The HFMC module consists of 3000 fibers packed in 2-in diameter cylinder of Polyvinyl chloride (PVC) with fiber‘s efective length of 25 cm. As shown on the results of this study, super hydrofobic Polypropylene hollow fiber membrane contactor work effectively in removing ammonia from waste water. The highest ammount of ammonia that can be removed was obtained for initial concentration of 800 ppm which is 620.12 mg/L. In this study, the highest overall mass transfer coefficient is achieved at waste water pH of 12 which is 0.004 m.s-1.
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    Pembuatan Pulp Pelepah Sawit dengan Pelarut Asam Formiat
    (2014-02-04) Zulfansyah; Fermi, Muhammad Iwan; Amraini, Said Zul
    The pulping of oil palm fronds with formic acid medium. has been studied in an effort to develop an efficient and environmentally safe process. This research is conducted to study the effect of pulping conditions on the pulp yield and lignin content. The experiment was run at concentration of formic acid in cooking liquor of 65, 75, 85%-wt, hydrogen peroxide concentration in cooking liquor of 1, 3" 5%-wt, cooking time of 1, 2, and 3 hours. The cooking of oil palm fronds was accelerating in a reactor batch at the boiling temperature of formic acid in standard condition. The effects of dependent variables on the independent variables were studied by statistical modelling using a second-order incomplete factorial design. The emprical models were deduced to satisfactorily fit experimental data with-the values of independent variables and allow quantifiying the effects of each variables. The most influential factor on yield pulp ·wasformic acid concentration. Whereas, the cooking time has greater influence on lignin content.