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INDONESIA
Jurnal Rekayasa Pangan dan Pertanian
Published by Universitas Sumatera Utara
ISSN : 2303386X     EISSN : -     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Rekayasa Pangan dan Pertanian merupakan media untuk publikasi tulisan asli berkaitan dengan teknologi pangan dan keteknikan pertanian secara luas, yang diterbitkan atas kerjasama antara Program Studi Ilmu dan Teknologi Pangan dan Program Studi Keteknikan Pertanian Fakultas Pertanian USU.
Arjuna Subject : -
Articles 20 Documents
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Search results for , issue "Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian" : 20 Documents clear
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.
Ropes Made from “Lidah Mertua” Leaf Fiber Detyara Imani; Lukman Adlin Harahap; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Fiber of Sansevieria has characteristics of not easily fragile, shiny, long, and good quality. This study was aimed to make and to examine the quality of rope made from “Lidah Mertua” leaf fiber (Sansevieria trifasciata laurentii). This research was conducted by literature study, spinning the rope using spinners simple tool, tensile test and parameters observation. Parameters measured were tensile strength, strain, elasticity, rope deformation, and flexing. Results of the research indicated that each substance tested with the same weight produced different string diameter. Average values of examinated ropes was 1,2 g weight, diameter was 4,26  mm, length was 34 mm, elongation was 17,2159 mm, maximum loaded was 659,2695 N, cross section was 14,31 mm2, elongation at break of tensile strength was 46,85 N/mm2, strain was 0,5063, elasticity was 92,5322 N/mm2, ropes deformation was 17,2159 mm and flexing was 50,63 %. Key words : Sansevieria, fiber ropes, natural fiber, tensile test
The Operation Work Evaluation and Maintenance of Serbangan Irrigation System in Rawang Panca Arga District Asahan Regency Devi Ariyanti Manurung; Sumono Sumono; Sulastri Panggabean
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Serbangan  irrigation area is a technical irrigation area which has an area of 2.333 Ha. Evaluation of the performance of irrigation system is one way to describe the performance level of an irrigation system. This study was aimed to evaluate the performance of operation and maintenance of Serbangan irrigation system with observation or survey method. Some of the indicators used to determine the performance of the irrigation system were: functional performance and network infrastructure of irrigation, water sufficiency level, the level of accuracy of the provision of water, management of government institution, the availability of fund, human resources and farmer institutional performance. The results showed that the level of functional performance and irrigation network infrastructure was bad with the value of 2, the adequacy of water was sufficient with the value of 3,  the level of accuracy was very appropriate water supply with the value of 4,  the management of government institution was very good with the value of 4, the availability of funding was adequate,and human resources were not adequate each with the value of 2, the farmer institution performance was very good each with the value of 4. In general, the performance of operation and maintenance of the Serbangan irrigation system categorized good with a value of 2,98. Keywords: Irrigation system, maintenance, operation, performance, Rawang Panca Arga,  Serbangan
Design and Construction of Tempeh Slicer Fauzan Luhfi; Achwil Putra Munir; Sulastri Panggabean
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Slicing is reduction of the size of the foodstuffs into slices with a certain degree of thickness to be more easily processed into other products, one of them is into chips. This research was aimed to design, create, test and analyze the economic value tempeh slicer. Parameters observed were the effective capacity of the tool, the percentage of damaged materials, and economic analysis. Based on this research, it was summarized that the effective capacity of the equipment was 85.26 kg/hour  and the damaged material’s percentage was 15.3%. Economic analysis was as follows: basic costs for the first to the fifth year ware Rp. 128.416 / kg, Rp. 128.635 / kg, Rp. 128.870 / kg, Rp. 129.123 / kg and Rp. 129.395 / kg respectively. Break even point was 236,66 kg / year. Net present value was Rp. 1.270.819.564,93.  Internal rate of return was 52,68%. Keywords: tempeh, knife, slicing, equipment
Design Construction of Shrimp Paste Molder Muhammad Rasyid Lubis; Ainun Rohanah; Nazif Ichwan
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Manual molding shrimp paste was considered not attractive because the shape of the paste was not the same and reduced the price of shrimp paste. The purpose of this research was to design, build, test and analyze the economic value of shrimp paste molder. This research was conducted in by literature study, equipment tests and parameters observation. The parameters observed were effective capacity, yield and economic analysis. Based on this research, it was summarized that the effective capacity of the equipment was 51,54 kg/hour and the yield was 71,33%. Economic analysis was as follows: basic costs for the first to the fifth year was Rp.224,59/kg, Rp.225,16/kg, Rp.225,38/kg, Rp.226,45/kg, Rp.227,16/kg respectively. Break even point (BEP) was at 161,85 kg/year of shrimp paste molded. Net present value (NPV) was Rp.210.420.009. Internal rate of return (IRR) was 47,64%. Keywords: shrimp paste, molder, machine
Design of Coconut Milk Extractor with Screw Press System Febrina Medyanti Sinaga; Achwil Putra Munir; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Until now, obtain coconut milk was still obtain using conventional method which is hand pressed. Later on, manual coconut milk extractor is develop using hydrolic press system. With the development of science and technology in this modern age, people trying to create or make a new, more efficient and practical equipment. Therefore, in this research, the author tried to ease the extraction of coconut milk by designing coconut milk extractor with screw press system which has larger capacity which be more effective and efficient in coconut extraction. The coconut milk extractor worked by enter shredded coconut into hopper then shredded coconut is carried toward tubular filter contained  screw press. After that  the milk is produced and the dregs out separately. The results showed that the effective capacity of the equipment was 11,25 kg/hour. Primary cost was Rp. 787,022/Kg for the first year, Rp. 792,205/Kg for the second year, Rp. 797,777/Kg for the third year, Rp. 803,769/Kg for the fourth year, and Rp. 810,204/Kg for the fifth year. BEP was 1.238 Kg in the first year, 1.305 Kg in the second year, 1.377 Kg in the third year, 1.454 Kg in the fourth year and 1.537 Kg in the fifth year. The IRR was 45,54%. Keywords: equipment design, coconut milk extractor, coconut milk, screw press.
Manufacture of Particle Board Made from Durian Peel Riska Riska; Adian Rindang; Rudi Hartono
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Durian is a tropical plant from southeast Asia. Durian peel is household waste which has high cellulose that can be used as raw material for particle board. This study aims to determine the effect of concentration of isocyanate adhesive to the physical and mechanical properties of particle board as well as to determine the optimal level of adhesive in the manufacture of particle board made from durian peel (Durio Zibethinus Murr.). The study was conducted from March until July 2015. The research was conducted at the Workshop and the Laboratory Technology of Forest Products department of Forestry Faculty of Agriculture, University of North Sumatra. UPT Agricultural Mechanization of Agriculture Department of North Sumatra. Parameters measured were density, moisture content, thickness swelling, DSA, Modulus Of Rupture and Modulus Of Elasticity of particle board. The results showed that the value of physical and mechanical properties of particle board from leather durian not comply with the JIS A 5908- 2003 standard, except for the density and moisture content as well as the development of thick adhesive 2 hours at levels of 5% and 7%. Adhesive optimal levels in this study were 5% gluten content. Keywords : Durian Peel, Adhesives Isocyanates, Particle Board
The Test of Grinder Spacing on the Quality Gnetum of Gnemon chips On the Grain Chips Forming Tool Rio Baruna Sirait; Ainun Rohanah; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

This study was aimed to test the effect of  spacing on grinder cylinder to the quality of the chips on grain chips .The results showed that the resulting Gnetum gnemon chips categorized on the test grinder quality of 2 , the shape is not uniform, white browny ,  thickness uniform , and can be fried immediately after they are printed . Highest  yield was produced in spacing of cylinder grinder of 3 mm that is equal to 83 % and the lowest in spacing of cylinder grinder 1 mm that is equal to 78.2 %. The highest processing  capacity was found in the spacing of cylinder grinder of 3 mm that is equal to 3.01 kg / hour and the lowest was found in the spacing of cylinder grinder 1 mm that is equal to 2.61 kg / h . The best organoloptic value was found in the spacing of cylinder grinder 1 mm. Keywords : Distance cylinder, Quality Chips
Design Construction of Patchouli Oil Direct Steam Octo Fandi Sinaga; Lukman Adlin Harahap; Adian Rindang
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 4 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Distillation is one of the ways to take up patchouli oil that contained in the leaves, the example is leaf clovers. Leaf clovers has the high oil content with euganol that reaches of 85%. The postharvest processing’s purpose is to make the agricultural product have a higher economic value compared to the product without processed. The purpose of this research was to design, build, test and analyze the economic value of patchouli oil direct steam distillation type. The parameters observed were effective capacity and economic analysis. Based on this research, it were summarized that the effective capacity of the equipment was 13,33 ml/hour. Economic analysis, basic costs for the first to the fifth year was Rp. 1.054,77/ml, Rp. 880,48/ml, Rp. 822,67/ml, Rp. 793,82/ml and Rp. 776,55/ml. Break even point (BEP) for the first to the fifth year was 247,17 ml/year, 133,02 ml/year, 95,16 ml/year, 76,27 ml/year and 64,95 ml/year. Net present value (NPV) 6% was Rp. 12.060.105 whereas NPV 8% was Rp. 10.793.704,29 and Internal rate of return this equipment was 27,04%. Keywords : leaf clovers, distillation, machine

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