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TEKTAN
Published by Politeknik Negeri Lampung
ISSN : 20851278     EISSN : 27453472     DOI : https://doi.org/10.25181/tektan
Core Subject : Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science Mechanical Engineering
Jurnal Tektan merupakan salah satu jurnal di Politeknik Negeri Lampung yang  menampung hasil penelitian berupa artikel ilmiah yang berkaitan dengan Ilmu Keteknikan Pertanian, Mekanisasi Pertanian, Teknik Kimia, Teknik Sumberdaya Lahan dan Lingkungan,dimana artikel tersebut belum pernah dipublikasikan. Jurnal TekTan di terbitkan oleh Unit Penelitian dan Pengabdian Kepada Masyarakat Polinela Unit 3x dalam setahun. Jurnal Ilmiah Teknik Pertanian Ini diterbitkan oleh Unit Penelitian dan Pengabdian Kepada Masyarakat Polinela Sebagai Wadah Bagi Dosen, Mahasiswa dan PLP untuk mempublikasikan karya penulisannya. Jurnal ini sempat mengalami Jeda Pengaktifan Selama 3 tahun mulai terbitan 2016 sampai Agustus 2019, hal ini disebabkan karena kekosongan tim pengelola Jurnal. Kemudian dengan manajemen pengelolaan yang baru maka diterbitkan kembali untuk volume 11 No. 3 pada tanggal 16 Desember 2019
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 5 No 3 (2013)" : 6 Documents clear
Modifikasi Pengepingan Skema Leap Frog dalam Penentuan Karakteristik Profil Aliran Sungai dalam Mendukung Pemetaan Wilayah Banjir (Penelitian Awal) Andy Eka Saputra; Didik Kuswadi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.811

Abstract

In this study carried out by modifying the method LeapFrog split with The split the regulator equation St. Venant 1 dimensions. The factors used are data stream land cover and slope/contour. Rain put a lateral discharge equation while the discharge from upstream continuity included as a boundary condition on the grid points of the river. The final goal in future studies to produce an split which can be used to determine the flow profile characteristics of a river, so as to support the handling of flooding in the area desired nonstructure From the results of research conducted a few things that can be described Modifications made split Leap Frog has been successfully split the continuity equation and momentum with the results split. The split results for the continuity equation The split above results in the early stages this research in trying to in Microsoft Fortran programs running on 6.5 and at this early study tested a simple case of the trapezoidal cross section of the river as well as data supporting data retrieved from the data Sekampung river as an example the case for programs to run and found that the results are already responding injection split discharge Q Nakayasu Sekampung well with characteristic output the shape of the profile of the river flow and results split with Microsoft Fortran 6.5 program that is in use is generally obtained water discharge (Q) outputs the same program with a discharge Q Nakayasu with repeated time 50 years of segment 0 m at the river until 21 hour simulation model has the same result as shown in Table 4 (table discharge results of running the program), so that the program is appropriate and can be running on the characteristics of the next river.Keywords: leap frog, st venant, flood modelling, lateral discharge, boundary conditions, nakayasu
Analisis Model Pondasi Bangunan Air di Atas Tanah Rawa Berbahan Lokal Kelik Istanto; Andy Eka Saputra
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.846

Abstract

The research was distributed by foundation failure that supportted the waterworks on swamp soil which caused it collapsed. The objectives of this research were (1) Define foundation model on swamp soil using local material that suitable to swamp soil characteristic, (2) Generate foundation model that give efficiency value more than or equivalence to 70%, and, (3) Predict the bearing capacity of foundation model to support waterworks load. The proposed foundation models were pile group using gelam (melaleuca cajuputi sub sp.cumingiana) had 12 cm in diameter which plugged upright (M1), two-fifths in each row were plugged oblique with 15o to center line of waterworks (M2), and four-fifths in each row were plugged oblique with 15o to center line of waterworks (M3). Furthermore, it performed by computing the bearing capacity of each foundation model based on physical and mechanical properties of swamp soil in single pile, pile group, and block failure system. The research results shown that 40 cm in space between piles (Eg=70,3%), the foundation models produced the same bearing capacity to support waterworks load. Whereas, which 50 cm in space (Eg=76%), 60 cm (Eg=79,9%), and 70 cm (Eg=82,7%), each model produced different bearing capacity to support waterworks load and could describe by QM1<QM2<QM3. The maximum waterworks load could be supported by foundation model was 1,208.83 kg, it was happened in the third model with 70 cm in space. Keywords:  swamp soil, local material, pile group efficiency, and bearing capacity
Menaikkan Kadar Madu Sistem Spraying dalam Ruang Panas Harmen Harmen; Tutu Petrus Basuki; Yose Sebastian
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.847

Abstract

Honey is the natural sweet substance produced by honey bees from the nectar of flowers plants or other parts of plants. Honey is one of the important food sources for human nutrition because it contains 82.3% carbohydrate which is much higher than other livestock products. In addition to sugar, honey also contains mineral salts, proteins, and vitamins. Honey can be broken naturally (without human treatment) if the honey has been fermented. Yeast fermentation occurs high water content (23-30%). Safe from fermented honey water content is usually 16%-21%, or ideal levels of 16-20%. The decrease in moisture content (MC) is one of the most important steps in the processing of agricultural products. The decrease in MC can be done by drying.  Principally, the drying can be done in various ways, including the provision of heat to the material drying by spraying liquid materials in high-temperature hot room is a way decreased the water content by increasing the surface area of the material that is in contact with the hot air. Drying honey with fogging (spraying) is an alternative way, in addition to other means such as drying by putting honey in the refrigerator in this case in a room air conditioner or refrigerator. The purpose of the study is the characterization test system temperature spraying in the heat chamber, the water content of honey characterization test on the spraying system in a hot room.The treatment given to the wild honey is honey squirts hot room temperature within a few levels, the levels observed were honey (%) and temperature of honey after drying. From the observations it can be seen that, the higher the lamp power given the higher heat generated. Tools have been able to raise the level of the honey, the higher the heating temperature higher levels of honey content  produced. Temperature honey received lower than a given heating temperature. Keywords: honey, spraying, hot room
Rancang Bangun Pengendali dan Pemantau Suhu pada Dua Inkubator Telur Ayam Otomatis Rudi Darmawan; Sri Ratna Sulistiyanti; Syaiful Alam
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.848

Abstract

In this research, it was designed a temperature controller and monitoring system of  two automatic chicken eggs incubator. Based on references, hatched chicken eggs require temperature 38oC-40oC and relative humidity about 55-65%. The temperature sensor used is LM 35 and humidity sensor used is DHT 11. Temperature controller uses microcontroller ATmega 328 P. The temperature is controlled by switching on/off method on incandescent bulbs used as heating tool and DC fan as cooling tool. Monitoring system uses a computer with LabVIEW software and LCD 16x2 for incubator. Wheel shelf of eggs will automatically rotate egg on 06.00 A.M. at 0o and 18.00 P.M. at 60o using servo motor. Communication used by two incubator to transmit data to computer is uses I2C method. LM35 temperature sensor is calibrated by using thermometer and the obtained error is 0.285714%, while DHT 11 humidity sensor is calibrated by Hygrometer and the obtained error is 1.5%. The result of system test shows that the average stability of temperature on incubator 1 and 2 is 39.01oC and the average humidity is 60%. Incubator monitoring system of temperature and humadity is displayed with real time uses  LabVIEW software. Keywords: eggs incubator, controlling, monitoring, temperature, ATmega 328P
Model Pendekatan Nilai Konstanta Penggorengan Vakum Keripik Pepaya R Sugiharto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.849

Abstract

This research is purposed to examine constant analysis model with two dependent variables, they are vacuum pressure (-p) within three levels: 60; 65 and 70 cmHg and frying temperature (T) in three levels: 70; 80; and 90oC with the ratio product mass toward medium mass (oil) R=1:20 within twice repetition for papaya chips frying. Analysis is conducted to the result of research toward the influence of each treatment with statistic experiment LSD (Least Square Design) with vacuum frying constant (K). Research with analysis model approach prefer on emphasizing functional relation between dependent variable and independent variable within nonlinear equation of logarithmic exponential with vacuum pressure (-p) as the independent variable and  medium temperature or frying oil (T) in three level like have been mentioned.The analysis result with two independent variables vacuum pressure (-p) and vacuum frying temperature (T) got an equation for constant value of vacuum frying (KP=minut-1) and the prediction is: KP=1.4642*exp(-0.5*((((-p)-181.838)/45.1584)^2+((T-93.7826)/26.006)^2)); R2=0.921 The implementation of analysis result of vacuum frying constant value (K) which is used to predict history of chips water/moist level along the process of vacuum frying show the average of reliable validation experiment result (R2>0.94). Then the experiment result of fried chips very related to the timing of frying that have been applied, with relative of final water level which not truly different in the test level 5%. Keywords: vacuum frying, frying constanta and papaya chips.
Rancang Bangun Alat Penjernih Air Berbasis Masyarakat Pedesaan dengan Konsep Rucef (Re Use, Cheap, Easy And Flexible) Iskandar Zulkarnain; Ismadi Raharjo; Kelik Istanto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.850

Abstract

These the water purification tools are designed based on household needs that carrying the concept RUCEP (Re Use, Cheap, Easy and Flexible). The purpose of this research were: 1). Designing a simple water purification technology which is inexpensive, and easy to applied for rural communities in terms of producing clean water; 2). Determining  the values changes of physical parameter which includes the TDS values, turbidity values and pH value, 3). Determining the value changes of bacteriological parameter such as content of Ecoli bacteria in water and total number of colieform. Based on the research, an average outlet discharge  that produces water with clean visual quality is 1.964 liters/hour with a contact time of 1 hour 8 minutes. The measurement of TDS parameters showed that results for 6 hours, average of the TDS value is 154.33 ppm which is increased on average 17.81%  from the initial TDS value 131 ppm. The result of turbidity measurements showed that for 6 hours, average turbidity value is 8.388 NTU which is improved on average 87.60% from the initial turbidity value about 67.67 NTU. The measurement of pH paramater showed the results that for 6 hours, average of pH is 7.85 which decreased from the initial pH of the raw water at 8.24. While the average temperature of the water from filtration is still relatively the same as the raw water is 27.18oC. The measurement of the   E-Colie bacteria contents in samples of raw water and water filtration showed negative results for E-Colie bacteria contents, but the total of coliforms decreased from 14 mpn to 9.2 mpn or decreased about 34.286%. Keywords: technology, water purification, rural clean water

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