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Kampus Politeknik Negeri Lampung Jalan Soekarn Hatta No. 10 Raja Basa Bandar Lampung
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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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Penentuan Kadar Gula Buah Salak Secara Tidak Merusak Menggunakan Near Infrared (Nir) Spectroscopy dan Interval Partial Least Squares (Ipls) Regression Winarto Winarto; Meinilwita Yulia
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.v6i1.855

Abstract

The objectives of this research was to evaluate the feasibility of using NIR spectroscopy and interval partial least squares (iPLS) regression for nondestructive soluble solids content (SSC) determination in snake fruit. Spectra of snake fruit were acquired using a VIS-NIR USB4000 portable spectrometer in absorbance mode. The SSC was measured using a digital refractometer.  The calibration and validation models were developed using the iPLS regression using original spectra. The calibration results showed that the root mean square of cross-validation (RMSECV) of first six subintervals from 582-831 nm was lower than that of the average of RMSECV and these subintervals were selected for developing final iPLS regression. Using the selected subintervals the calibration has high quality of prediction with RPD = 3,35. Keywords: NIR spectroscopy, soluble solids content, absorbance mode, nondestructive   method, snake fruit, iPLS regression
Rancang Bangun Pengaturan Bukaan Choke pada Genset Hybrid (Bensin dan Bioetanol) Ridwan Baharta; Bastaman Syah
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.v6i1.856

Abstract

Until recently, generator available in the market, generally gasoline or LPG. Conversion of gasoline to fuel bio-ethanol requires some adjustments.The research conducted was  a further development of research Nurjan Didik Purwanto in 2011. The research was focused on adjustment of airand fuel ratio after the fuel in the generator set was replaced with bioethanol. Bioethanol has a higher octane rating than gasoline, but it has a lower calorific value than petrol. With this condition, it is necessary to attempt to increase the ratio of air and fuel to be more "fat " to regulate the entry of air through the carburetor. Settings ratio of fuel and air is done by adjusting the carburetor choke openings. This setting restores the stability of the engine, the same as using premium gasoline.This study primarily aims to expand the use of renewable energy, especially for the implementation of electric power for households.The results of this research  has been successfully realized by using a Timer Switch AC, 12 Volt DC timer switch, solenoid valve (solenoid valve), and actuators. Aperture choke1/3 on the use of bio-ethanol fuel produces almost simillar to  the engine speed compare to it when  using gasoline. Fuel consumption of bioethanol is 40% more than the use of  gasoline. Keywords: choke, gasoline, bio ethanol
Rancang Bangun Mesin Penyangrai Kopi dengan Pengaduk Berputar Imam Sofi’i
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.v6i1.857

Abstract

The roasting technique coffee bean was one of factor which influence quality powder coffee besides factor of raw material.   The roasting technique are include operator skill, mixing coffee bean in cylinder, air temperature in roasting’s cylinder,  heating source that is utilized, and activity after roasting.  The objective of this research is to make roasted machine of coffee bean with rotate mixer and test performance. Method is used by making roasted machine with cylinder made from stainless and rotate mixer from stainless strip spiral shape. In the top of cylinder fully equipped with covered and smokestack. Source of heat from elpiji stove.  The result of design was roasted machine coffee bean with dimension of length 92 cm, wide 62 cm and high 160 cm with ±40kg cylinder capacity.  Roasted machine component are beam, cylinder, mixer, side cover cylinder, inlet, outlet, top cover cylinder, anvil of stove and gearbox. Result of test showed that first test was 17,14  kg/jam capacity, second test was 24 kg/jam capacity and third test was 28.97 kg/jam capacity.  Rpm of mixer was 40 rpm and average fuel consumption 1.5 kg/jam. Keywords: roasted machine, spiral mixer
Rancang Bangun dan Aplikasi Irigasi Tetes Bawah Permukaan Emiter Serabut Kelapa untuk Budidaya Kol Bunga (Brassica oleracea botrytis L.) Dataran Rendah I Gde Darmaputra; Muhammad Idrus; Surya Surya
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.v6i1.859

Abstract

The research purposed to design and application of coconut fiber emitter of sub-surface drip irrigation for low land cabbage plant, to determine thickness of coconut fiber emitter that good  application for cabbage plant, to measure sub surface-drip  irrigation performance that are emitter discharge, wetted area diameter, water use, production and  water productivity. This research conducted at State Polytechnic of Lampung from June to November 2013. The results showed that coconut fiber emitter of sub-surface drip irrigation can be applied to  cabbage plant. Thickness of coconut fiber emitter that good application for cabbage plant was 15 mm with 10 mm fasteners diameter. Water use of cabbage plant with application of coconut fiber emitter of sub-surface drip irrigation was 0.081 m3 per plant, 38% more efficient than kettle (gembor) irrigation (0.131 m3/plant). Water productivity with coconut fiber emitter of sub-surface drip irrigation was 3.58 kg/m3, 67% more higher than kettle irrigation  (2.15 kg/m3). Keywords: design, application, coconut, emitter, drip,  irrigation, cabbage.
Study Morfologi dan Marfometri Das Way Mesuji Danang Primanggara; 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.v6i1.860

Abstract

Morphology and Morphometry watershed is a specific description of the watershed that was characterized by parameters related with: broad, shape, orientation, altitude, slope, flow patterns, river gradient, and the River’s density. This study aims to obtain data Morphology and Morphometry watershed conditions. Steps of this study were (1) identified criteria of morphology and morphometry watershed, (2) overlay watershed parameters. The results of this study were (1) Way Mesuji sub watershed is dominated by an elongated shape. This is caused the value of each Circularity Ratio Way Mesuji sub-watershed  less than 0.5; (2) Sub-watershed Slope is dominated by flat and ramps.This will result a slow velocity river stream; (3) region  altitude was dominated by a height of 25 meters above sea leve; (4) The flow pattern was dominated by the denditrik flow pattern; (5) The gradient of the river was dominated  less than 1%. Its caused that  river flow velocity will be low; (6) river density was dominated by medium and low grade.This shows that this area enough water reserves. Keywords: morphology, morphometry, Way Mesuji watershed.
Produktivitas Air Beberapa Varietas Selada dengan Sistem Irigasi NFT (Nutrient Film Technique) di PT. Momenta Agrikultura Lembang Bandung Barat Widya Sari; Muhammad Idrus; Surya Surya
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 3 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i3.861

Abstract

The research was conducted at the PT. Momenta Agrikultura Lembang West Bandung on February to April 2015. The objectives of the research were to determine amount of water used, production, and water productivity on several varieties of salad (Lactuca sativa L.) with irrigation system nutrient film technique (NFT).  The result of the research showed that the variety of salad affected amount of water used, production and water productivity of salad with irrigation system nutrient film technique (NFT).  The amount of water used of several salad  varieties were 23.52 l/plant of cyurly salad, 25.02 l/plant of red salad, 12.71 l/plant of romain salad, and 15.09 l/plant of batavia salad for one circle of  planting 45 days.  Production of batavia salad were 170.2 g/plant not significantly different compared to romain salad of 166.0 g/plant but higher compared to curly salad of 142.6 g/plant and red salad of 94.2 g/plant. Water productivity of romain salad were 13.60 kg/m3 not significantly different compared to batavia salad of  11.91  kg/m3 but higher compared to curly salad of 6.18 kg/m3 and red salad of 3.77 kg/m3.   Keywords: salad varieties (curly salad, red salad, romain salad, and batavia salad), irrigation system nutrient film technique (NFT), water used,  production, and  water productivity
Rancangbangun Alat Press Baglog Jamur Dua Silinder Dengan Penggerak Motor Listrik Fajri Husna; Fiqi Al Hidayat; Muqorrobin Muqorrobin; Yose Sebastian; Meinilwita Yulia
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 3 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i3.863

Abstract

Mushrooms are plants that have a nucleus, spores, no chlorophyll and are heterotrophic. Mushrooms can not produce their own food, they get nutrition by way of absorption. Nutrients are absorbed from the mushrooms existing in the organic material in which they live (Alexopoulos and Mims, 1996). Baglog is a media into the growth of mushrooms which comprises a mixture of basic materials such as wood sawdust, rice bran, limestone and so on. The mixture will be allowed to stand for 2-3 days so that all the materials decompose properly. All the material that has decomposed properly inserted into the plastic which will then be compacted. This media must be completely solid to support the growth of mushrooms. Compaction is done by using a press baglog mushrooms (Sunarmi and Saparinto, 2010). Keywords: mushroom baglog, two cylinder, electric motor
Modifikasi Pengering Tenaga Surya dengan Ventilator Otomatis Subarjo Subarjo; Tri Widodo; Muhammad Yusfiar Karfiandi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 3 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i3.866

Abstract

Radiant energy from the sun is one of the alternative energy sources to replace the role of oil as a primary energy source. Alternative forms of energy that can be used is to dry the material/material. One form of utilization of solar radiation energy is raising the air temperature. Solar collector is one example of the utilization of solar energy. Moving the hot air from the collector to the drying chamber is accelerated by a ventilator installed above ruangpengering. Dryer tool consists of two parts, solar collector and drying chamber that can directly receive the energy from the sun. Measurements were performed in this study is the temperature (T), humidity (Rh) and air velocity (v) who are outside and inside the drying chamber. Measurements were taken during the 5 days of observation starts at 11:00 until 15:00. an interval of one hour of measurement. The drying chamber reaches the maximum temperature at 11:00 until 13:00 with a temperature of 40.6⁰C while outside the drying chamber (conventional) only 39.8⁰C occurred at 12:00 hours until 13:00. kelemban (Rh) diruang dryers lower than outside the room pengring an average of 47.44% and 57.24% outside the drying chamber, the air flow in the drying chamber of 0.695 m/sec is still higher when compared with data obtained on the appliance dryer without a ventilator that is 0.195 m/sec. obtained water content (KA) end at 18.67% drying within 5 days, whereas for conventional drying KA obtained by 27.11%. Keywords: collector, ventilator, drying
Sistem Keamanan Elektrik (Electrical Security System) Sebagai Antisipasi K3 pada Laboratorium Instrumentasi dan Kelistrikan Mekanisasi Pertanian Politeknik Negeri Lampung Nurjan Didik; Puji Wiyono; Bagio Suasono
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 3 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i3.870

Abstract

Electrical security system is the human effort to maintain security and comfort in their environment in which he works. Not least in the laboratory instrumentation and electrical Agricultural Mechanization Polytechnic State of Lampung. As anticipate things that are not desirable in respect of negligence that often occur in the laboratory such as; AC (Air Conditioning), solder, lights and other equipment that is still alive when it is not used anymore, then used as a reference for making an electrical security system as anticipation  Health, Safety, Work in the laboratory. The purpose of this tool is to make the security system of electricity in the laboratory of agricultural mechanization and the anticipation of Health, Safety, Work and to minimize damage to equipment as well as conserve electrical power used in addition to the manufacture of the tool also has a specific purpose; - By creating this system also can be used as a modeling tool or practicum for students primarily in Agricultural Engineering study program. - In order for students able to apply to the world of work, and apply to the community - Conducting development tools, according to the results of analysis of technical specifications as a means of research and community service for lecturers and laboratory assistant (PLP) Thus negligence or omission that could cause a short circuit in the electrical network, equipment breakdowns that led to a fire in a laboratory can be reduced or minimized, and it can save power consumption when the excessive electrical equipment is not used. Keywords: electrical security system, electrical power
Pengaruh Frekuensi Pemberian Air Irigasi Terhadap Produktivitas Caisim Hidroponik dengan Media Sekam Bakar di PT. Momenta Agrikultura Lembang Epri Hartono; Muhammad Idrus
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 1 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i1.871

Abstract

The experiment was conducted at the PT. Momenta Agricultura Lembang Jawa Barat from March  to April 2014.  The objective of the research were to study irrigation frequency   of caisim hydroponic will given good yield and water productivity. Four level of irrigation frequency treatments were 1,3,5, and 7 times per day. The result of the research indicated that irrigation frequeny of 5 times per day of caisim hydroponic with carbonized rice hull media was obtained highest water productivity 7,45 kg m-3 compared to 1,3, and 7 times irrigation per day.  Irrigation frequency of 5 times per day was obtained good yield of caisim hydroponic is average 78,22 g/plant not significantly compared to yield of caisim non hydroponic with 1 times irrigation per day is average 80,78 g/plant.   Keywords: irrigation frequency, caisim, hydroponic, carbonized rice hull, production, and water productivity

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