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Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Published by Universitas Lampung
ISSN : 2302 559X     EISSN : 2549 0818     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Teknik Pertanian Lampung or Journal of Agricultural Engineering (JTEP-L) is a peer-reviewed open-access journal. The journal invites scientists and engineers throughout the world to exchange and disseminate theoretical and practice-oriented researches in the whole aspect of Agricultural Enginering including but not limited to Agricultural Mechanization, Irrigation, Soil and Water Engineering, Postharvest Technology, Renewable Energy, Farm Structure, and related fields. The first issue was published in October 2012 by Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. Jurnal Teknik Pertanian Lampung has ISSN number 2302 - 559X for print edition on October 10, 2012 then 2549 - 0818 for online edition on January 10, 2017. Jurnal Teknik Pertanian Lampung is issued periodically four times a year in March, June, September, and December. Jurnal Teknik Pertanian Lampung has been indexed by Google Scholar, Crossref, Directory Open Access Journals (DOAJ), and CABI. Since Volume 5 Issue 1 (2016) Jurnal Teknik Pertanian Lampung has been accredited as SINTA 3 by Directorate General of Higher Education (DIKTI). Starting Volume 10 Issue 3 (2021) the journal received accreditation SINTA 2.
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Search results for , issue "Vol 3, No 1 (2014)" : 10 Documents clear
KAJIAN PENURUNAN MUTU DAN UMUR SIMPAN JAMUR TIRAM PUTIH (Pleurotus ostreatus) SEGAR DALAM KEMASAN PLASTIK POLYPROPYLENE PADA SUHU RUANG DAN SUHU RENDAH Mutiara Cahya; Rofandi Hartanto; Dwi Dian Novita
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Oyster mushroom is one of commodites that has prospect to be developed in Indonesia. In case of fresh oyster mushrooms usually have a short shelf life due to high moisture content and are still experiencing respiratory process, so as to speed up the process of deterioration. Packaging with polypropylene plastic packaging is one method of storage to maintain freshness and shelf life of oyster mushroom. The purpose of this study is to examine and determine the rate of decline in the quality and shelf life of fresh white oyster mushrooms in plastic packaging polypropylene at room temperature and low temperature during storage.This research was conducted in two phases, namely the measurement of respiration rate experiments and storage of fresh oyster mushrooms in plastic containers in different volumes at room temperature and low temperature. Parameters observation in this study that changes in weight, projected area is reduced crown circumference, discoloration, water content, respiration rate and shelf life.The results showed that the oyster mushroom storage in polypropylene plastic packaging can maintain the rate of decline in the quality and shelf life of fresh white oyster mushrooms either at room temperature or low temperature. Water content and the highest weight changes during storage in plastic containers at room temperature are both on day 3 and 7 at low temperature that is equal to 92.81%, 150.52 g, 91.76%, and 130.79 g . Control oyster mushrooms at room temperature and low temperature had the highest respiration rates at the 24th and 48th in the amount of 230.48 and 239.53 mg. CO2/kg.hour. Oyster mushrooms in packaging stored at room temperature (31˚C) can last up to 5 days and 14 days at low temperature (9˚C). Keywords: Oyster Mushrooms, polypropylene plastic, storage temperature, packaging, respiration rate
PENGARUH RASIO MOLAR DAN WAKTU REAKSI TERHADAP HASIL DAN MUTU BIODISEL MELALUI REAKSI TRANSESTERIFIKASI DENGAN GELOMBANG ULTRASONIK Viffit Desiyana; Agus Haryanto; Sri Hidayati
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Biodiesel is alkyl esters that are produced through alcoholysis or (transesterification) process of triglycerides with methanol or ethanol in the presence of bases.  The purpose of this study was to determine the effect of the molar ratio and reaction time on the yield and quality of biodiesel from used cooking oil through transesterification process assisted ultrasonic wave at a frequency of 42 kHz.  This research was conducted using waste cooking oil obtained from the cracker factory in Sukarame, Bandar Lampung.  The chemicals used are methanol and NaOH as catalyst (both are of technical grade).The experiment was arranged by two factors, namely the molar ratio and reaction time.  Factor molar ratio of methanol the used cooking oil is composed of three levels, namely 3 : 1, 4,5 : 1, and 6 : 1.  Reaction time factor consists of three levels, 5 minutes, 10 minutes, and 30 minutes.  All treatments are carried out with three replications.  The results showed that the presence of ultrasonic wave can eliminate the process of heating and stirring at conventional biodiesel transesterification process.  Production of biodiesel produced in this reaction ranged from 55,67 to 70,67 % with the characteristics density of 0,86 to 0,94 kg/liter, acid number 0,09 to 0,15 %, and viscosity of 4,16 to 8,07 cSt.  Statistically, molar ratio and reaction time significantly affect the yield and acid number of biodiesel but did not significantly affected the viscosity and density of biodiesel.  Molar ratio and reaction time best obtained at a molar ratio of 6 : 1 with reaction time of 30 minutes.  Biodiesel produced could potentially be used as a substitute fuelin kerosene stove. Keywords: Molar ratio, reaction time, biodiesel, used cooking oil, ultrasonic wave
UJI KINERJA PROTOTIPE ALAT PEMBERSIH GABAH Yadi Sudirman; Sri Waluyo; Warji .
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Separation of paddy from empty grains and unexpected materials is one step in post harvest handlings done usually after cutting.  This step is acquired to have the high quality of paddy.  Separation that conventionally done by farmers, in general, is inefficient and can pose difficulties such us: high losses, high energy need, time consuming and depend on weather.  Application of separation machine is needed as an alternatif to overcome to those difficulties.  The purpose of this test is to determine the capacity and efficiency of work time required. The research was done in some steps: design of the equipment, manufacturing, testing and finally, data analysis.  The test was conducted in 3 levels of wind mover: 850 rpm, 1070 rpm and 1300 rpm.  Observation was focused on the percentage of empty grain, duration of separation and work capacity.  From the results, it can be concluded that the best wind mover for separation was 1070 rpm.  It could separate filled and empty grain effectively at 96,06%.  The average of work capacity of the equipment was 127,07 kg/hour.Keywords: Separation, rpm, Paddy.
UJI KINERJA ALAT PENGERING HYBRID TIPE RAK PADA PENGERINGAN CHIP PISANG KEPOK Ika Novita Sari; Warji .; Dwi Dian Novita
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Lampung Province was one of the banana production centers areas in Indonesia, one of them is kepok banana.  Bananas don't have a long shelf life, so that it needs an alternative treatment to prolong shelf life so it can provide the value-of banana fruit.  Drying system with hybrid is an alternative option. The purpose of this study is to test the performance of the hybrid dryer shelves type for drying banana chips.  This research was conducted with three treatments, they were drying using solar energy, drying using electrical energy, and drying using solar energy and electricity, which was using 5 kg banana chips for each treatments.  The three treatments of this research showed different results.  It took 9 hours to drying banana chips until it reached the water content 10%-12% on drying using solar energy, while drying using electrical energy needed 11 hours, and 8 hours on drying using solar energy and electricity.  Energy produced on drying using solar energy amounted to 55859,52 kJ, drying using electrical energy amounted to 27680,4 kJ and drying using solar energy and electricity was 64417,17 kJ. Keywords: Kepok banana chips, drying, the shelves type hybrid dryer
UJI KINERJA PROTOTIPE ALAT PENGIRAT BAMBU Fauzan .; Tamrin .; Sri Waluyo
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Bamboo is becoming versatile plant for rural communities for many utilities, such as house, bridge, ladder, Geribik, fence, handicraft, etc. Now, Indonesian bamboo craftsmen are still using a manually method to rod  bamboo. So that it is needed to make a tool that enhances efficiency and quality of bamboo strip as raw material to produce bamboo-made handicrafts. This study aimed to make a tool that enhances efficiency and quality of bamboo strip as raw material to produce bamboo-made handicrafts.The steps are as follows one bar of bamboo was cutted with 0.5 m length and 0,15 width. Then, the outer skin was peeled before it was sliced into some strips. Next, the strips of bamboo was feeded to a channel and booster unit in a spinned condition. Each tests were repeated 3 times i.e. 5 samples in wet condition and 5 samples in dry condition. Part of tested bamboo was classified into 3 types i.e. culm, middle and end. Then,  percentage of rodent bamboo, and the period of split process.The performance test of splitter bamboo tool for wet bamboo found that the percentage of bamboo culm is 33,33 %, middle 20 % and end 26,67%. Based on the percentage, Culm has bigger percentage than others due to the culm has a more suitable thickness with the knife from the splitter tool. Whereas the dry of the sample found that the percentage of culm, middle is similar about 33,33 % and the end part of the bamboo has percentage around 20 %. This condition exists since the dry sample of the bamboo has a more stabilized texture than the wet one due to still high water content. Keywords: Testing, splitter, bamboo
PERBANDINGAN TEKNIK PEMAJANGAN SAYURAN DAUN UNTUK MEMPERTAHANKAN KESEGARAN SELAMA PENJUALAN Sri Wahyuni; Sugeng Triyono; Ahmad Tusi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (997.43 KB) | DOI: 10.23960/jtep-l.v3i1.%p

Abstract

This study aimedto observe the effect of soakingthe root of leafy vegetableson thefreshnessduringsale.  Vegetablesused werekangkungandgreen mustardfrom hydroponicsandconventionalcultivations.  Treatments wereconsistedofsoakingwithaeratedwater, soakingwithunaeratedwater, soaking withaerated nutrient solution(EC 0.4mS/cm), displaying in mist sprayed (humidified) cabinet without soaking,andcontrol(neither soaking nor spraying).  Soakingwas donein aglasscontainer(50cm length, 40cm width, 20cm height)andfilledwithwater±20liters/5 cm height.  Parametersmeasured werewater content, leaf water potential,andleafdiscoloration.  The results showedthatthe average room temperature and RH were found about 29oC and 80%. Respectively temperature and RH in the humidified cabinet were not much different from the ambiance.  Soakingwithaeration was able to keep vegetables fresh without wilting process.  Percentage of yellowing reached 10% of the total number within 5days for hydroponics kangkung, 2 days for conventional kangkung, 4days for hydroponics green mustard, and 2 days for conventional green mustard during the display.  Vegetables displayed in the room with no treatment (control) were wilting consistently, their water content was decreasing, and their water potential tended to increase from the beginning.  Thus, discoloration was more proper parameter for the soaked vegetables, while change of water content and water potential were more proper for non soaked or spayed vegetables. Keywords: Aerated, display, leafy vegetables, soaking
RANCANG BANGUN BUCKET ELEVATOR PENGANGKAT GABAH Suhendri, Ohen; ., Tamrin; Lanya, Budianto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.418 KB) | DOI: 10.23960/jtep-l.v3i1.%p

Abstract

Farmers are generally included the grain into sacks manually way is to use the tub or bucket.  It certainly require excessive manpower.  An option to helping that activity by using mechanical handling devices such as bucket elevator.  This research aims to design, manufacture and test of bucket elevators for handling of grain.  The method used in this research is the design, manufacture and testing process.  Design process is done using software autoCAD, which is followed by a manufacturing.  The next process is the testing performed by two operators and three variation rotation.  After doing the design and manufacture, it produced a bucket elevator with chain tilt angel 60º, 76,3 cm length, 74,15 cm width and 146 cm high.  From the test results, obtained volume of bucket 0.410 liter/bucket.  Capacity bucket elevator reach          20 kg/min, 16 kg/min and 14 kg/min at 54 rpm, 39 rpm and 45 rpm rotation sprocket.  The highest capacity 20 kg/min achieved at 5 inch diameter pulley, with 54 rpm rotation sprocket. Keywords: Design, grain, bucket elevator, volume bucket, capacity bucket elevator.
PENGARUH LAMA AERASI TERHADAP PERTUMBUHAN DAN HASIL TANAMAN SAWI (Brassica juncea L.) PADA HIDROPONIK DFT (Deep Flow Technique) Diah Yulita Ningrum; Sugeng Triyono; Ahmad Tusi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

This study aims to determine the effect of duration of aeration on the growth and yield of mustard plants (Brassica juncea L.), nutrient solution and electricity consumptions.  The experiment was conducted in September and October 2013 at The Integrated Field Laboratory, and Land and Water Resources Engineering Laboratory, The Departement of Agricultural Engineering, The University of Lampung.  The experiment consisted of four treatments of aeration intervals including N24M0 (control), N15M30 (15 minute on-30 minute off), N15M60 (15 minute on- 60 minute off) and N15M90 (15 minute on- 90 minute off).  Each treatment was divided into 3 segments along the gutter, including R1 (segment near the aerator), R2 (middle segment chamfer) and R3 (section away from the aerator).  The results showed that the use of a nutrient solution circulating pump with a flow rate of 0.27 cm/s is sufficient for EC, DO, pH fairly uniform along the gutter.  Aeration with interval 15 minute on- 60 minute off turned out to produce the highest mustard crop (2,146 kg) with the lowest consumption of fertilizer and electricity by IDR 1753.00/kg. Keywords: Aeration, DFT, hydroponics, intermitten, mustard
PENGARUH SUHU DAN WAKTU REAKSI PADA PEMBUATAN BIODIESEL DARI MINYAK JELANTAH Shilvia Vera Sinaga; Agus Haryanto; Sugeng Triyono
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

This study aimed to utilize waste cooking oil as raw material for biodiesel production and to study the influence of time and temperature of the transesterification reaction on the biodiesel production and its characteristics.  The study was conducted by base transesterification with NaOH at a molar ratio of waste cooking oil to methanol 1:6.  A combination of three levels of temperature (45⁰C, 55⁰C and 65⁰C) and three levels of reaction time (5 minutes, 10 minutes, and 30 minutes) was performed.  Each treatment was conducted with 3 replications.  The results showed that the yield of biodiesel was affected by temperature and reaction time.  The optimum treatment combination was transesterification at temperature of 65⁰C and 30 minutes of reaction time, which produced 72,87 % methyl ester with a density of 0,85 g/ml, viscosity of 1,65 cSt and acid number of 0,07 %.  Although the density and acid number of biodiesel produced met the biodiesel quality standards of Indonesia (SNI), it was not recommended to be used as fuel engine. Keywords: Biodiesel, waste cooking oil, transesterification, temperature and reaction time.
UJI KINERJA PENJEMURAN GABAH PADA PARA-PARA MEKANIS DENGAN TIGA KONDISI LINGKUNGAN Setiawan, Mahendra Dwi; ., Tamrin; Lanya, Budianto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 1 (2014)
Publisher : The University of Lampung

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Abstract

Traditional grain drying is a practical way of drying grain, cheap, simple and commonly used by farmers.  Grain is spread on the floor which causes grain mixed rock and dirt around the drying floor.  Disadvantages in traditional grain drying are it requires a lot of manpower to spread, to flip back and to collect the grain, and requires large floor for drying.  On the other hand, grain drying using mechanical rack has the advantage that it avoids some of the grain that is not mixed with rock and dirt while drying, shorten the drying time, and easily move the grain when it rains. The purpose of this study was to test the performance of mechanical dryer.  The experiments were set up with drying treatment at 80 cm above the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land with 4 cm thick of sample. The parameters measured in this study were consisted of drying time, moisture content, drying rate, energy of radiation received, the energy to evaporate the water and heats of the material, and drying efficiency. The results of research on the treatment of three environmental conditions indicated that. The average water content was 13.90% wb, 13.82% wb, and 13.98% wb respectively for the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land. The average drying rates in this study were 0.494% /h for the surface of cement floor, 0.487% /h for on top of grassy land surface, and 0.534% /h for on the surface of rocky land.  Drying time in this study were 10 - 11 hours with an average radiation energy received on this experiment at 614.42 Watt/m2. Drying efficiency of each treatment were 12.58%, 12.43%, and 13.72% respectively for the surface of the cement floor, on top of grassy land surface, and on the surface of rocky land. From the observations and calculations derived drying over the surface of cement floor, on top of grassy land surface, and on the surface of rocky land are recommended for drying using a mechanical rack dryer. Keywords: Drying, grain, mechanical rack

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