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Ainun Rohanah
Program Studi Keteknikan Pertanian, Fakultas Pertanian USU
Agriculture, Biological Sciences & Forestry Engineering

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Test of Liquid Soap Stirrer of Soap Made from Used Cooking oil With Extract of Lemongrass, Pandan and Lemon Faris Faisal Rahman; Ainun Rohanah; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 3 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Use cooking Oil is the remains of frying oil that can not be reused. Therefore a further processing is needed, one of them is to be come liquid soap. The aim of this study was to process used cooking oil into liquid soap using the extract of lemongrass, pandan and lemon. The study was conducted at the Laboratory of Agricultural Engineering and parameters tested at the Food Chemical Analysis Laboratorium Faculty of Agricultural in April 2015 to Mei 2015 by using a non-factorial completely randomized design. Parameters measured were water content, free fatty acid (FFA), alcohol insoluble part, and organoleptic test. The result showed that extract of lemongrass, pandan and lemon extract had no significant effect on water content, free fatty acid (FFA) and alcohol insoluble part. Keywords: used cooking oil, liquid soap , extract of lemongrass, pandan, lemon
Design and Construction of Liquid Soap Stirrer Made from Used Cooking Oil Muhammad Imam Al Hakim; Ainun Rohanah; Lukman Adlin Harahap
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 3 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The process in making liquid soap from used cooking oil is an interesting thing to know. This research was held to design, construct, test, and analyze economic value of liquid soap stirrer made from used cooking oil. The parameters observed were water content, free fatty acid (FFA), alcohol insoluble part, effective capacity, yield, and economic analysis. Based on this research, it was summerized that effective capacity of this equipment was 20,26 l/hr. Yield percentage was 97,8%. Basic cost for the  first to fifth year were Rp 735,95/l, Rp 738,08/l, Rp 738,38/l, Rp 739,76/l and Rp 741,24/l. Respectively break event point was 440,53 l/year. Net present value with 7,5% rate was Rp 378.115.195 and internal rate of return was 48,36%. Keywords: liquid soap, used oil cook, effective capacity, yield, economic analysis
Design and Construction of Mechanical Screw Potato Slicer) Saud Pangihutan; Ainun Rohanah; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 3 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

To serve the need of potato consumers for the ready good potato, it must be processed through post-harvest . Some of the process is cutting and slicing. The need of post-harvest processing that leads to mechanization and to get the optimum gain and high efficiency, potato screw slicer had to be designed and constructed. The study was conducted with literature study, experiment, observation and testing of the equipment. The effective capacity of the equipment was 51,72 kg/h. Basic cost to be incurred in slicing potato with the equipment was Rp. 199,72/kg in the 1st year, Rp. 199,99/kg in the 2nd year,Rp. 200,26/kg  in  the 3rd, Rp. 200,56/kg in the 4th and Rp. 200,87/kg in the 5th. The equipment will reach the break even point if the amount of slicing potato was 889,,30 kg/year. Net present value of the equipment with an interest rate of7,5% was Rp. 391.040.422,54which meant that the business was feasible to run. The internal rate of return was 49,45%. Keywords: equipment design, mechanical screw slicer, potato.
Thread Pitch Test of Candlenut Oil Press Screw Josafat Simanjuntak; Saipul Bahri Daulay; Ainun Rohanah
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 3 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Basicly, the oil press is designed for pressing the candlenut. This reasearch was on testing of thread pitch variaton of oil press which was aimed to measure the best thread pitch of candlenut oil press. This reasearch was conducted at agriculture engineering laboratory USU on August 2014 – January 2015 using non factorial randomized block design with three grades, i . e 1 cm, 2,5 cm, and 4 cm. Parameters observed were effective capacity, losses, and yield. The best grade for effective capacity and yield was P3 (pitch 4 cm) which produced 0,381 l/kg and 322 l/kg; and the best grade for losses was P2 (2,5 cm) which produced 29,733 % Keyword: pressing, candlenut, candlenut oil, thread
Test of Type of Decomposer on Compost Making from Waste of Oil Palm Fronds on The Quality of Compost Yield Reni Rhys; Lukman Adlin Harahap; Ainun Rohanah
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 3 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Compost is a result  of plant waste decomposition that caused by microorganism decomposition. Therefore it needs a decomposer to fasten organic decomposition. This research was done in April until August 2015 in Soil Laboratory, Agricultural Technology Research Agency of North Sumatera and Agricultural Engineering Laboratory, Faculty of Agriculture, USU, Medan, using non factorial completely randomized design with four types of MOL, i, e, orange MOL, mango MOL, pinneapple MOL, and papaya MOL. Measured parametres were comparison of C/N, pH and yield. The results showed that there was no different effect given by orange MOL, mango MOL, pinneapple MOL, and papaya MOL in the case of C/N, pH and yield. Key words: Compost, decomposer, palm frond.
Determination the Value Evapotranspiration and crop coefficient of oil palm tenera Variety (Elaies guenensis Jack) Ade Rahmi Alhas; Ainun Rohanah; Sumono Sumono
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Considering that the oil palm plants consume a lot of water, it is needed more assessment of the magnitude of the rate of evapotraspiration especially oil palm plantations, and in the initial value stages the process can begin from nursery. The value of crop evapotranspiration can be determined based on the value of potential evaporation and oil palm crop coefficients for each growth period. This study is aimed to determine the evapotranspiration value and crop coefficients of4 months old tenera seeds.Evapotranspiration value of oil palm plantations in the initial period of plant research was 0.9 mm/day and the final period of the plant was 0.98 mm/day. The amount of evaporation in the initial period of the study was 1.98 mm/day and in the final period was 1.93 mm/day. The study shows that oil palm crop coefficient in the initial period was 0.47 and in the final period was 0.5. Keywords : Evapotranspiration, Crop coefficient, potential evaporation, oil palm Plant
Manufacture of Fiber Ropes Made from The Inner Bark of Melinjo Stem (Gnetum gnemon) Bela Velila Viska Yunita; Saipul Bahri Daulay; Ainun Rohanah
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Melinjo plant has a very high quality of fiber that found in the inner bark of  the stem that can be made as a rope as a substitute to synthetic ropes that can decrease environmental pollution. The research was aimed to make a fiber rope from the inner  bark of melinjo  stem and to test the endurance of the rope toward a tensile test. The research had been conducted at Agriculture Engineering Laboratory, College of Agriculture, USU and tensile test was conducted at Research Laboratory, College of Engineering, USU in March-July 2015 using spinners simple tool in making the rope and tensile test to determine the strength of the rope toward burden. Parameter  measured were tensile stress, strain, elasticity, ropes deformation, and malleability. The results showed that heterogeneous fiber caused different rope diameter and affect the value of parameters measured. From the ropes test it was found that  average tensile stress was 42.38 N/mm2, strain was 0.3742, ropes deformation was 35.17867 mm, elasticity was 114.1673 N/mm2 and malleability was 37.42 %. Key Words : Natural fiber, rope, inner bark of melinjo stem, spinning, tensile test.
Co-Authors Ade Rahmi Alhas Bela Velila Viska Yunita Faris Faisal Rahman Josafat Simanjuntak Lukman Adlin Harahap Muhammad Imam Al Hakim Reni Rhys Saipul Bahri Daulay Saud Pangihutan Sumono Sumono