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INDONESIA
Jurnal Keteknikan Pertanian
ISSN : 24070475     EISSN : 23388439     DOI : -
Core Subject : Agriculture,
Jurnal Keteknikan Pertanian dengan No. ISSN 2338-8439, pada awalnya bernama Buletin Keteknikan Pertanian, merupakan publikasi resmi Perhimpunan Teknik Pertanian Indonesia (PERTETA) bekerjasama dengan Departemen Teknik Mesin dan Biosistem (TMB) IPB yang terbit pertama kali pada tahun 1984, berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Jurnal ini diterbitkan dua kali setahun. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain: teknik sumberdaya lahan dan air, alat dan mesin budidaya, lingkungan dan bangunan, energi alternatif dan elektrifikasi, ergonomika dan elektronika, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerpan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya.
Arjuna Subject : -
Articles 623 Documents
Pendekatan Analitik untuk Menduga Koefisien Pindah Panas Konveksi Ida Bagus Putu Gunadnya; Kamaruddin Abdullah; Armansyah Halomoan Tambunan
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2158.724 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

Convective heat transfer coefficient has an important role in thermal processes. It is commonly determined and formulated using empirical models, while some workers have also proposed formulas based on analytical methods. This paper describes the formulation of convective heat transfer coefficient using an analytical approach which could be expressed as h = 5.277 V0.5Keywords: convective heat transfer coefficient, analytical approach Diterima: 11 Juni 2007; Disetujui: 24 September 2007
Kinerja Hidrolika Sistem Fertigasi Mikro Naswir .; Soedodo Hardjoamidjojo; Nora H. Pandjaitan; Hidayat Pawitan
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1778.528 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

A micro fertigation system was designed using local components, simple and easy to build, operate and repair by farmers. Evaluation of hydraulic performances consists oflong-path size in emitters, relationship between discharge and head in emitter, head loss along the lateral, and emission uniformity. The result of the research indicated that the micro fertigation system with 0,5 mm inside diameter micro-tubing used to control the flow from outlets along laterals. The individual microtube was 0,6 m long and spaced at 0,3 m interval along laterals. The discharge was adjusted by stop valves and ranges from 0,48 -2, 74 ltrs/h at operating heads of 0,2-1,5 m. The emission exponent, x was 0,86, and the head-discharge equation was Qe= 1,94 H0,86. The coefficient of manufacturing variation, CV was 0,043 from 125 samples of emitters, and an interpretation of values was excellent. Accordingly allowable length of lateral (at operation head, H = 1 m) 15 meters of length PVC hose ¼ inch size was acceptable and 25 meters of length PVC hose 5/16 inch size was acceptable. The design of micro fertigation system have emission uniformity, EU > 85% far all treatments.  Keywords: micro fertigatian system, hydraulic performance, emission exponent, head loss, emission uniformity Diterima: 6 Agustus 2007; Disetujui: 12 Nopember 2007
Lama Pemanasan Metode Vapor Heat Treatment (VHT) dan Pelilinan Untuk Mempertahankan Mutu Pepaya Selama Penyimpanan Rokhani Hasbullah; Elpodesy Marlisa; Ali Parjito; Edy Hartulistiyoso
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1945.394 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

Horticulture products are host for Tephritidae fruitflies that are considered a quarantine risk by many importing countries. This research was conducted to find out the specific condition for the heat treatment using vapor heat treatment (VHT) method to control pest and diseases of papaya and the fruit quality during storage. Papayas were vapor heat treated at medium temperature of 46.5 0C for 0, 15, and 30 minutes. After the treatment, the fruits were waxed using beeswax of 6 % in concentration and then stored at temperature of 10 0C. The results show that the fruitfly of oriental fruitfly (Bactrocera dorsalis) was completely killed by treating in deep water testing at temperature of 46 0C for 10 minutes or at 43 0C for 30 minutes. The VHT of papaya at fruit core temperature of 45.5-46.0 0C for 15-30 minutes following waxing using beeswax of 6% in concentration was found to be effective to control pest and diseases until 21 days of storage without any visible signs of heat injury and without adversely affecting the quality of the fruit. Keywords: Papaya, vapor heat treatment, waxing, quarantine Diterima: 20 Agustus 2007; Disetujui: 24 Nopember 2007
Simulasi Penggunaan Lahan Untuk Kelestarian Bendung Bila pada Sub Das Bila Propinsi Sulawesi Selatan Sitti Nur Nur Faridah; Totok Prawitosari
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2080.507 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

The optimal land use system in Bila sub-watershed is the land use system that can give erosion contribution rate below or minimally equal to the Tolerable Soil Loss (TSL) value of Bila sub-watershed soil. The erosion factors are determined by parameter : R (rain erosivity), K (soil erodibility),: LS (topography), C (land coverage), and P (land conservation). Each parameter is overlaid, than it is evaluated in each land unit in Bila sub-watershed. The acquired data is processed by using Geographic Information System (GIS) supported with Arc View program and Microsoft Word and Microsoft Excel softwares. The qualified erosion and sediment rate values obtained from simulation result which is meet the standard for erosion and sediment control and management in Bila sub-watershed area and Bi/a weir were 10,597 tonnes/ha/yearand 50,864 m3/km2/year respectively. Keywords: ---Diterima: 3 Oktober 2007; Disetujui: 25 Pebruari 2007
Perancangan dan Konstruksi Mesin Sortasi dan Pemutuan Buah Jeruk dengan Sensor Kamera CCD Usman Ahmad; Rudy Tjahjohutomo; Mardison S.
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2193.859 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

Citrus is one of important fruits in Indonesia and its production increases every year. However, postharvest equipment for citrus is very limited, leading to low postharvest technology utilization. The objective of this research was to develop a real-time quality evaluation system using a color CCO camera, to be used as an image sensor and processing unit for quality evaluation of the citrus from acquired image. The system consists of a color CGO camera, a computer with an image frame grabber, an image acquisition chamber, a logic control panel, and a software to run all the installed hardware Some important parameters of visual quality of citrus were studied. Five groups of different quality of citrus, obtained from a big trader in Pasar Induk Kramatjati, were used for samples. The images were captured and then analyzed with image processing program using area projectio and RGB and HSI color model algorithms, for the fruit size and color respectively. The results were analyzed to determine whether there were parameters that correlates with weight, sweetness and firmness, to be used for quality evaluation. Visual parameters that figures the real quality of citrus best were then selected to be used for quality parameters to develop a real-time quality evaluation system for citrus in the next step.Keywords: image processing, sortasi, pemutuan, otomatis Diterima: 15 Oktober 2007; Disetujui: 18 Pebruari 2008
Modifikasi Mesin Pemanen Udang/Ikan Tipe Vakum Berdasarkan Analisis Antropometri Diza Puspa Arista; Sam Herodian; Muhamad Yulianto
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1213.509 KB) | DOI: 10.19028/jtep.027.1.%p

Abstract

Abstrak Banyak pertimbangan yang digunakan saat merancang suatu desain alat atau mesin, salah satunya yaitu Ergonomika. Ergonomika membuat perancangan efektif dan efisien dari segi sistem, juga segi kenyamanan dan keselamatan kerja operatornya. Penelitian ini bertujuan untuk mengetahui kondisi posisi kerja operator dalam menjalankan sistem kerja mesin dengan simulasi dan analisa ergonomi menggunakan CATIA P3 V5R20, kemudian memodifikasi sesuai dengan prinsip ergonomika yang berkaitan dengan postur tubuh (antropometri) rata-rata orang Indonesia, untuk mendapatkan posisi kerja yang nyaman, aman, dan produktif. Data antropometri yang digunakan adalah data petani pria di Kecamatan Dramaga, Bogor. Sedangkan objek yang dianalisis adalah mesin pemanen udang atau ikan tipe vakum. Hasil simulasi ergonomi berupa tanda warna beserta nilai akhir (Final Score) yang dibandingkan dengan metode RULA. Posisi kerja dengan Final Score terbaik adalah saat mengoperasikan tutup lubang intake yaitu bernilai 2 dengan tanda warna hijau serta statusnya acceptable. Sedangkan posisi kerja kurang baik yaitu saat menyalakan engine, dengan Final Score 4 serta status posisi kerja Investigate Further. Dari hasil simulasi tersebut perlu dilakukannya modifikasi terhadap hasil rancangan, yaitu dengan pemindahan posisi engine dan penambahan komponen tangga sebagai pijakan kaki. Evaluasi yang kembali dilakukan dari hasil modifikasi menunjukkan hasil yang lebih baik jika dibandingkan dengan sebelum modifikasi. Kata kunci: desain, ergonomi, simulasi, CATIA Abstract Many considerations was used when designing a tool or machine, one of that is ergonomics. Ergonomics makes the designing was effective and efficient in terms of the system, and operator’s comfort and safety also. The objective of this study is to determine the condition of operator in carrying out the work system of machine with simulation and ergonomics analysis using CATIA P3 V5R20, then modify it according to ergonomics principles that related to the posture of Indonesian people average (anthropometry), to get a comfortable working position, safe, and productive. Anthropometric data was used are male farmer’s data in Dramaga, Bogor. The object that would analyzed is the vacuum type shrimp or fish harvester. The results are a color sign and the final score that compared with RULA Method. From the simulation can be seen that the best Final Score is when operated the intake hole cap with the value of 2, the color code is green and acceptable. The worst result is when cranked the engine with the value of 4 and investige further. Modification was made to displace the engine position and addition the components for footing. The results of ergonomics simulation after modified was better than before. Keywords : design, simulation, ergonomics, CATIA Diterima: 22 Oktober 2012 ;Disetujui: 18 Februari 2013
Ekstraksi Air Biji Atung (Parinarium glaberimum Hassk) untuk Mendapatkan Bahan Pengawet Alami Sandra Hiariey; Lilik Pujantoro; Sugiyono .
Jurnal Keteknikan Pertanian Vol. 27 No. 1 (2013): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.813 KB) | DOI: 10.19028/jtep.027.1.%p

Abstract

Abstract The objectives of this study were to extract atung seed with water through boiling process to obtain a natural preservative. Atung seed was extracted in boiling water at different ratio (1:5; 1:7; 1:10) and boiling time (10, 20, 30 minutes). The extracts were analyzed their total phenol and antimicrobiol activity. Result showed that the best extract was obtained from the ratio of 1:5 (atung seed : water) and 10 minutes boiling. The best extract had a total phenol of 88.13 mg/100g and antimicrobiol activity of 9.3 mm. Keywords : Water Extraction, atung seed, natural preservative Abstrak Tujuan penelitian ini adalah melakukan ekstraksi biji atung dengan cara perebusan untuk mendapatkan bahan pengawet alami.Dalam penelitian inidilakukan ekstraksi biji atung dengan perbandingan atung dan air yang berbeda (1:5, 1:7, 1:10) serta lama waktu perebusan yang berbeda (10, 20 dan 30 menit). Hasil ekstraksi dianalisis total fenol dan aktivitas antimikroba. Perlakuan terbaik terdapat pada ekstrak dengan perbandingan 1:5 (atung dan air) selama 10 menit perebusan. Hal ini diperlihatkan dengan nilai total fenol sebesar 88.13 mg/100 g dan aktivitas antimikroba 9.3 mm. Kata kunci : Ekstraksi air, biji atung, pengawet alami Diterima: 20 Desember 2012; Disetujui:2013  
Teknik Pengukuran Laju Respirasi Produk Hortikultura pada Kondisi Amosfir Terkendali Bagian 2: open system method Rokhani Hasbullah
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5395.197 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

Abstract The design of modified atmosphere packaging (MAP) requires steady state respiration rate data. The respiration rate of fresh produce is usually measured by the open system method where a steady stream of gas is passed through a respiration jar. It needs gas mixing unit to get certain level of controlled atmosphere (CA) condition and  an instrument to analyze gas composition. In this research, a gas chromatograph of Hewlett Packard of HP 5890 series with a thermal conductivity detector and suitable column was used to analyze the composition of oxygen, carbon dioxide and nitrogen simultanously. The measuring result of respiration rate of broccoli under CA conditions indicated that the gas composition gave significant influences. The respiration rate at a constant CO2 concentration decreases with decreasing O2 concentration. Keywords: broccoli, respiration rate, modified atmosphere packaging, gas chromatograph Diterima: 10 Desember 2007; Disetujui: 21 Maret 2008
Analisis Pindah Panas pada Pipa Utama Sistem Hidroponik dengan Pendinginan Larutan Nutrisi Choerunnisa, Nurul; Suhardiyanto, Herry
Jurnal Keteknikan Pertanian Vol. 3 No. 1 (2015): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (726.484 KB) | DOI: 10.19028/jtep.03.1.%p

Abstract

AbstractIn a hydroponic culture with root zone cooling system, the temperature of cooled nutrient solution rises during distribution to the root zone of the plants. The aims of the research were to analyze the heat transfer from environment to nutrient solution in the main pipe of irrigation for hydroponic system, to validate the heat transfer model, and to develop a guidance to determine the inlet temperature for nutrient solution cooling. Mathematical model for heat transfer in the pipe was developed from heat transfer and fluid flow equations. Temperature of nutrient solution at the inlet position in the main distribution pipe was calculated by using validated heat transfer model. Validation of heat transfer model was done to compare the calculated temperature of nutrient solution with that of measured temperature. The results of heat transfer model validation showed that the heat transfer model is accurate to predict the temperature of nutrient solution in the main pipe. Therefore, the heat transfer model has been used to develop a guidance to determine inlet temperature of nutrient solution for certain condition of thermal environment and expectedoutlet temperature of nutrient solution.Keywords: heat transfer analysis, nutrient solution cooling, main pipe, substrate hydroponic systemAbstrakDalam kultur hidroponik dengan sistem pendinginan terbatas, suhu larutan nutrisi mengalami kenaikan selama didistribusikan menuju zona perakaran tanaman. Tujuan dari penelitian ini adalah untuk melakukananalisis pindah panas pada pipa utama sistem hidroponik, melakukan validasi terhadap model pindah panas tersebut, dan mengembangkan panduan untuk menentukan suhu dalam pendinginan larutan nutrisi pada posisi inlet. Model matematika untuk pindah panas dalam pipa tersebut dikembangkan dari persamaan-persamaan pindah panas dan aliran fluida. Suhu dari larutan nutrisi pada posisi inlet dari pipa distribusi utama dihitung dengan menggunakan model pindah panas yang telah divalidasi. Validasi model pindah panas dilakukan untuk membandingkan suhu larutan nutrisi hasil perhitungan dengan hasil pengukuran. Hasil validasi dari model pindah panas menunjukkan bahwa model pindah panas akurat untuk memprediksi suhu larutan nutrisi di dalam pipa utama. Oleh karena itu, model pindah panas tersebut digunakan untuk mengembangkan panduan dalam menentukan suhu larutan nutrisi pada posisi inlet untukkondisi lingkungan tertentu dan suhu larutan nutrisi posisi outlet.Kata kunci: analisis pindah panas, pendinginan larutan nutrisi, pipa utama, sistem hidroponik substratDiterima: 09 Oktober 2014; Disetujui: 07 Januari 2015
Analisis CFD Aliran Udara Panas pada Pengering Tipe Rak dengan Sumber Energi Gas Buang Hablinur Alkindi; Y. Aris Purwanto; Dyah Wulandani
Jurnal Keteknikan Pertanian Vol. 3 No. 1 (2015): Jurnal Keteknikan Pertanian
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (905.999 KB) | DOI: 10.19028/jtep.03.1.%p

Abstract

AbstractHot air from residual biomass combustion in biomass power plant can be used for drying process. The objective of this syudy was to analyze the distribution of hot air inside tray dryer using Computational Fluid Dynamic (CFD) and to modify the dryer room for copra drying based on the result of CFD analysis. Result of CFD analysis shows that the distribution of hot air inside dryer room was not homogen among trays. The average temperature at top tray (I) was 90.0±10.8oC and bottom tray (IV) was below 49oC. Modification of dryer room was carried out by adding partition wall in the end of tray to allow the hot air flow through all trays. After modification, the temperature of drying air inside dryer room increased and the temperature distribution was better than that before modification. Form CFD simulation it was resulted the temperature of drying air at tray I, II, III and IV were 114oC, 124oC, 135oC and 119oC respectively. Fruthermodification was carried out to obtain the drying temperature of 75-90oC. This drying temperature was achieved by decreasing the frequency electricity for suction fan from 50 to 25 Hz, 20 Hz and 15 Hz. From CFD simulation was indicated that in order to obtain the temperature inside dryer room of 75-90oC, the frequency of electricity should be decreased to 206.9oC (20 Hz) to 230.7oC (25 Hz).Keywords : gas from residual biomass combustion, CFD, temperature distribution, tray dryer.AbstrakUdara panas sisa pembakaran biomassa pada alat pembangkit listrik tenaga biomassa dapat dimanfaatkan untuk proses pengeringan. Tujuan penelitian ini adalah menganalisis sebaran suhu pada ruang pengering dari alat pengering tipe rak yang memanfaatkan udara panas sisa pembakaran biomass menggunakan Computational Fluid Dynamics (CFD) dan melakukan modifikasi ruang pengering berdasarkan hasil simulasi CFD yang sesuai untuk pengeringan kopra. Hasil analisis CFD untuk sebaran panas di ruang pengering menunjukkan ketidakrataan sebaran udara panas antar rak pengering. Suhu rata-rata pengukuran rak paling atas (I) 90.0±10.8oC, sedangkan rak IV (bawah) 49oC. Modifikasi ruang pengering dilakukan dengan menambahkan dinding pembagi untuk mengarahkan udara pengering yang diletakkan di ujung rak I, II, dan III. Setelah penambahan dinding, udara panas lebih merata dan terjadi kenaikan suhu yang disebabkan karena panas gas buang yang besar yaitu sekitar 294.5oC. Suhu rata- rata simulasi CFD setiap rak I, II, III dan IV masing masing 114oC, 124oC, 135oC dan 119oC. Modifikasi selanjutnya dilakukan untuk mendapatkan suhu pengeringan antara 75-90oC yang sesuai untuk pengeringan kopra dengan menurunkan frekuensi kipas hisap dari 50 Hz menjadi 25 Hz, 20Hz, dan 15 Hz. Penurunan frekuensi kipas hisap menyebabkan penurunan suhu dalam ruang pengering. Dari hasil simulasi CFD menunjukkan bahwa untuk mendapatkan suhu dalam ruang pengering 75-90oC, maka suhu gas buang diturunkan menjadi 206.9oC (20 Hz) hingga 230.7oC (25 Hz).Kata kunci: gas sisa pembakaran biomassa, CFD, distribusi suhu, pengering tipe rakDiterima: 22 Oktober 2014; Disetujui: 15 Januari 2015

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