Browsing by Author "Purnama, Edi"

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    FERMENTASI NIRA SORGUM MENJADI BIOETANOL DALAM FERMENTOR BIOFLO 2000 MENGGUNAKAN SACCHAROMYCES CEREVISIAE
    (2012-10-30) Purnama, Edi; Chairul; Hafidawati
    Increased energy demand of fuel oil (BBM) of the world have limited the availability of raw materials in the form of natural resources dwindling fossil fuels. The increase in energy demand over the years 2000 - 2009 an average of 7% per year. Based on data from the Directorate General of New Renewable Energy and Energy Conservation of the share of non-fossil energy <5%, in order to meet the fuel needs to be developed non-fossil fuels. One type of biofuel (BBN) is bioethanol. The raw material is potentially as sweet sorghum bioethanol (Sorghum bicolor L. Moench). Sorghum juice contains glucose levels from 10 to 14.40%. Bioethanol is the result of fermentation of carbohydrates with the help of microorganisms. In order to produce bioethanol plant scale, it is necessary to scale up the manufacture of bioethanol from sorghum juice through fermentation using Sacharomyces cereviceae biofermentor 10 000 ml size and alcohol concentration test using alkoholmeter. The purpose of this study was to determine the effect of volume and time starter fermentation to ethanol production levels, optimum fermentation conditions and growth kinetics of Saccharomyces cereviceae with volume variation starter (250 ml 500 ml and 750 ml) at each sampling time (6; 12; 24; 48; 72 and 96 hours). The fermentation process takes place in batches on the operating conditions of pH (4.0 to 5.0,) stirring speed of 200 rpm and at room temperature. 5000 ml juice fermented sorghum, with initial sugar concentration of 118.138 mg / ml as a fermentation medium is best demonstrated on the condition of the addition of 250 ml volume starter, fermentation time 72 hours with concentrations of ethanol produced 55.251 mg / ml, the ethanol yield of 91.702 g / ml with a final sugar concentration of 0.082 mg / ml, specific growth rate -0.0022 hour-1, petumbuhan maximum specific rate of 0.064 hr-1 and the substrate saturation constant of 0.024 gr / l.
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    Penggunaan Beberapa Perangkap Dengan Ketinggian Berbeda Untuk Mengendalikan Lalat Buah (Diptera: tephritidae) Pada Tanaman Cabai Merah (Capsicum annum L)
    (2013-04-17) Purnama, Edi; Salbiah, Desita; Sutikno, Agus
    Fruit flies are a major pest in chili, the need for environmentally friendly control techniques are highly desirable, especially effective and efficient, and easy to get one farmer is using restraint techniques petrogenol Steiner traps and pitfalls glumon to the level of a distinct yellow. The study aimed to determine the ability of the two types of traps with different heights in controlling fruit fly pests in cropping red chili (Capsicum annum L). This research has been carried out by using randomized block design (RBD) with 6 treatments and 4 groups, in order to obtain 24 units of the experiment. The treatments were performed in this experiment are: yellow traps glumon with a height of 100 cm, yellow traps glumon with a height of 150 cm, yellow traps glumon with a height of 200 cm, Steiner traps petrogenol with a height of 100 cm, Steiner traps petrogenol with a height of 150 cm and Steiner traps petrogenol with a height of 200 cm. Data were analyzed statistically by analysis of the range and tested further by Duncan's New Multiple Range Test (DNMRT) at the level of 5%. The parameters measured were, identification of trapped fruit flies, the number of fruit flies trapped, the number of male fruit flies trapped, the number of fruit flies trapped females and sex ratio of fruit flies. The results showed a yellow trap glumon with a height of 100 cm is more effective fruit fly trap with average percentage ranged from 498.25 to 531.5 tails for 8 weeks observed.