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INDONESIA
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 80 Documents
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Rancang Bangun Sistem Kontrol Peralihan Beban pada Dua Generator Set Secara Automatis Ridwan Baharta; Winarto Winarto; Nurjan Didik
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.839

Abstract

This research is the development of a generator that can be on/off automatically based on the existence of commercial power. Genset used in the study is the generator of household scale premium gasoline. In particular, this study aims to make switching system for two generators with timer settings to prevent loss of power. Testing the performance of the system is made to ensure that the system is functioning properly. Specification design tool created an amalgamation of two generators which can perform on/off according to a predetermined time. After the generator 1 operating for 4 hours, then automatically generator set 2 will live. About 10 seconds since the first 2 live generator, the generator 1 is still in operation, then the load will be transferred to the generator 2. With this delay system, then nothing happens lost power. This mechanism will be repeated after 4 hours of generator 2 operates. With this system, the availability of electrical power would continue as needed. Keywords: automatic transfer switch, generator set
Identifikasi Wilayah Rawan Banjir Kota Bandar Lampung Dengan Aplikasi Sistem Informasi Geografis (SIG) Didik Kuswadi; Iskandar Zulkarnain; Suprapto Suprapto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 1 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i1.840

Abstract

Development and deforesting were quite in many parts of Indonesia. Change of function become impervious land caused an imbalance of hydrology and watershed conditions. The objective  of this research were (1) to determined the class of a flood- prone of Bandar Lampung City, (2) to made a map of flood- prone of  Bandar Lampung City. Based on the research, it can be some results: (1) The class interval of flood- prone is 100; (2) Flood- prone  levels of Bandar Lampung District is divided into five classes, namely: very low, low, medium, high, very high; (3) The domination of flood- prone area of Bandar Lampung City was medium, the areas of this is 104.74 km2 (57.28%); (4) The highest potential flood- prone was Western Telukbetung sub districkt, that they had the condition were the slope is flat, soil type was inceptisols, height of land was 0.0 to 12.5m from sea water level, and rainfall was high. Keywords: identification, flood-prone, geographical information system
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
Rancang Bangun Irigasi Tetes Emiter Tali untuk Budidaya Semangka (Citrullusvulgaris) Muhammad Idrus; I Gde Darmaputra; Surya Surya
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.851

Abstract

The research was conducted at the Research Field of Lampung State Polytechnic, Bandar Lampung from August to November 2014.  The objectives of the research ware: (1) to designing of the drip irrigation with plastic rope emitter for watermelon cultivation; (2) to determining the hydrolic criteria of  the drip irrigation with plastic rope emitter for water melon cultivation; and (3 ) to  testing  the performanses of the drip irrigation with plastic rope emitter which are water storage efficiency, water distribution efficiency and water produktivity of water melon.    The result of the research showed that the drip irrigation with plastic rope emitter with 2, 3, and 4 cm length of emitter given flow rate of 7.205, 6.40, and 2.790 l/s respectively on the operation pressure of 0,15 atm. The size of 1 sub block the drip irrigation with plastic rope emitter is 15 m x 50 m for minimize pressure variation in the sub block.  The diameter and length of manifold pipe are 25 mm and 15 m, but the lateral pipe are 13 mm and 50 m. The diameter of main pipe depend on amount of the sub block   irrigated on once time irrigation. Total dynamic head for two sub blocks  irrigated is 3,44 m head and  pump capacity minimal 1,02 l/s.  The water storage efficiency, water distribution efficieny of the drip irrigation with plastic rope emitter were 100% and 87,73%.  The water melon production on the the drip irrigation with plastic rope emitter was 5,83 kg/plant was not significant different compared to furrow irrigation method was 5,64 kg/plant.  But irrigation water productivity of watermelon was significant different between of them. Water irrigation productivity of water melon by the drip irrigation with plastic rope emitter of 133 kg/plant was higher than the furrow irrigation method of 59 kg/plant.  Amount of iririgation water application on water melon cultivation by the the drip irrigation with plastic rope emitter was only 44 l/plant, but the furrow irrigation method was higher of 96 l/plant.  There for the amount of water  irrigation can be conserved on water melon cultivation by the drip irrigation with plastic rope emitter was 54%  compared to the furrow irrigation method. Keywords: drip irrigatoin, furrow irrigation, pressure operation emitter, flow rate, water melon, production, water storage efficieny, water distribution effiency, and irrigation water productivity.
Evaluasi Penyebab Genangan Banjir Wilayah Perkotaan Pringsewu Berdasarkan Dimensi Saluran Drainase Eksisting Ismadi Raharjo
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.853

Abstract

Subdistrict Pringsewu consisting of 13 villages are urban area that is now the capital of the district Pringsewu. For urban areas, sub Pringsewu require well drainage infrastructure. In fact, today, if heavy rains, there are several locations, especially in the national road (Jalan Ahmad Yani) and provincial road (Jalan KH Gholib) were flooding  . This study aimed to evaluate the cause of the flooding in  urban areas Pringsewu based on the dimensions of the existing drainage channel. The research was conducted from June to December 2013. The results of the observation pattern Pringgsewu flow direction in the region can be divided into two (2) primary drainage systems, Sidoarjo System and Way Semah System. Rate of region rain through Thiesen polygon from 3 (three) rain stations that are representative of the region and then analyzed using the method Log Person III and Gumbel with return period of 50 years gain Rainfall of maximum daily (RH max) of 110,81 mm/h. Maxiimal rain intensity (I max) with a return period of 50 years using the formula obtained Mononobe is 13,03 mm./h. Drainage coefficient value (C)   is influenced by the use of land that is currently changing in urban areas Pringsewu, Sidoarjo system is expected to have a value of C=0,65, and for systems Way Semah estimated to have a value of C=0,45. With variable of I max and C as well as the value of the catchment area (A) which depends on each zone served by drainage channels, then by using the rational formula can be calculated discharge runoff that is expected to flow into the drainage channel at Q=CIA. From measurement of the existing dimensions of the drainage channel can be estimated the capacity of the channel, so as to evaluate the adequacy the drainage channel capacity to accommodate the runoff discharge in each zone. The results of these evaluations is only about 15,3% of channels in Sidoarjo system sufficient; whereas in the system Way Semah about 20%. For that in order to address the problem of flooding urban areas Pringsewu need immediate revitalization of existing drainage channel dimensions so that  the channels have sufficient capacity to accommodate rainfall runoff discharge in each zone. Keywords: flooding, urban areas, capacity drainage channel, discharge run off
Kajian Hidrolis Rencana Tanggul Pengendali Banjir Sungai Batanghari Kecamatan Bungur Kabupaten Lampung Timur Bagas Arya Hermuda; Didik Kuswadi; Andy Eka Saputra
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.854

Abstract

Hydraulic embankment design done to solved flooding problems that it caused by damage  the catchment area, sedimentation, and the capacity of the river was not able to cover the stream during a peak discharge. The purpose of this research were (1) determined the flood discharge design, and (2) made hydraulic embankment design. Steps of research activities were the preparation, survey and topographical measurements, collected hydrological data,  processed of topography and hydrology data, counted the design maximum discharge, designed embankment river. The results showed that (1) the existing discharge was 479,745 m3/s, (2) the result of hydraulic design of Batanghari River embankment were the design discharge of  return period 50 years was 938,339 m³/s, the base width of the channel (b) by 35,5 m, the depth of flow (h) by 6,5 m, the slope embankment (1:m) by 1:1, height of freeboard by 1.0 m, wide embankment by 4,0m. Keywords: hydraulic embankment design, the river, flooding, the discharge

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