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Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)

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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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Articles 1,077 Documents

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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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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

TEST OF PERFOMANCE ERK HYBRID DRYER WITH BIOMASS FURNACE AS ADDITIONAL HEATING SYSTEM FOR NUTMEG SEED (Myristica sp.) DRYING Guyup Mahardhian Dwi Putra
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 3, No 2 (2014)
Publisher : The University of Lampung

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Conventional drying depend on the weather. It was caused agricultural product damaged, and moldy attack. So we need hybrid dryer with a source of radiation and solar biomass to continuous drying and can be controlled.The aims of this research is test performance of ERK hybrid dryer to drying the nutmeg seed during the drying process. Experiments were conducted to determine the distribution of temperature in the dryer in condition with no material and material conditions. Input of energy derived from biomass combustion in the furnace (evening) and combination of biomass and radiation (during the day). Measurements of temperature and RH using a thermocouple CC and alcohol thermometer. Temperature and RH to be measured include temperature and RH in dryer with several measurement points representing the up, middle , bottom and inlet temperature, outlet temperature and ambient temperature measurements at intervals of 30 minutes. The results showed average temperature ranges between 42 ° C - 51 ° C and RH ranged between 50.96 % -55.65 % . Time of drying is used to dry nutmeg from the initial moisture content from 80.72 % wb to 9.67 % wb is 52 hours with an average drying rate is 7.8 % db / hour . The total energy used to heat and vaporize materials,water that is 290 499.9 kJ. Efficiency of drying system 8.63% and energy of drying required to water evaporated is 28520.62 kJ / kg. The result quality of product obtained color of nutmeg generally more uniform.Key word : nutmeg seed, drying, green house, efficiency.

THE EFFECT OF TILLAGE SYSTEM AND HERBICIDE ON SURFACE RUNOFF AND EROSION FOR CASSAVA CROP FIELD IN LABORATORIUM LAPANG TERPADU OF AGRICULTURE FACULTY UNIVERSITY OF LAMPUNG M Khory Andreawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 4, No 1 (2015)
Publisher : The University of Lampung

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Land degradationis amajor factor indecreasing the productivity of the land. Themostfrequently land degradationoccurred is due to surface runoff and erosion. One of the causes of the surface runoff and erosion is humantreatment.Human treatment of the land can accelerate or reduce surface runoff and erosion. This study aims todetermine the effect of both tillage systems and herbicide on surface runoff and erosion on crop cassava field inlaboratoriumlapang terpaduAgriculture Faculty,University ofLampung.The experimentwas designas a factorialin randomized complete block design with four block. This experiment used multislot devicermethod with size 4x 4meter. Treatment consists of two factorswhich are tillage systemand herbicide. The results of this experimentindicate that tillage system did not affect surface runoff and erosion significantly and herbicide treatmentincrease surface runoff compare to treatment without herbicide, which is 32,8 mm and 24,6 mm, but did notsignificantly affect erosion.Keywords: Tillage,Herbicide,Run off, Erosion

QUALITY CHARACTERISTIC OF CARRAGEENAN SEAWEED KAPPAPHYCUS ALVAREZII WITH DIFFERENT BLEACHING TREATMENT: QUALITY ASSESSMENT OF ORGANOLEPTIC AND PROXIMATE Irma Suryani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 4, No 3 (2015)
Publisher : The University of Lampung

This research was aimed to determine the effect of bleaching method at different bleaching places and type ofwater soaking toward the quality of seaweed. This research uses a randomized factorial design. It consists of 2factors;which are type of bleaching place and type of soaking. At the first factor, there are two levels, namely thelevel of seawater and freshwater. On the second factor there are two levels, namely the level of land soaking andsea soaking. The results of the research showed that the bleaching treatment at sea with the type of sea watersoakingwas thebest treatment based onseveral parameters: byProximate,Organoleptic, and bleaching treatmentswith different soaking.Keywords: Kappaphycus alvarezii, carrageenan, organoleptic, proximate.

THE EFFECT OF CONCENTRATION CARRAGEENAN FLOUR AND GLYCEROL AS EDIBLE COATING AGAINST THE CHANGES IN QUALITY OF STROWBERRIES (Fragaria x ananassa) DURING STORAGE Rita Nopita Sari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 4, No 4 (2015): Special Edition
Publisher : The University of Lampung

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Strawberries is one of the horticultural products which have a high economic value however short shelf life. Fruit damaged is mainly caused by process of respiration and transpiration. One of the manipulation of this factors can be done by coating technique. The aim of this research was to find out the best coating on strawberries used different concentration of carageenan and glycerol, and observed the changes of physical and chemical on Strawberries during storage. This study used completely randomized design factorial with the first factor of the concentration carrageenan (0.5%, 1%, 1.5%, 2%, 2.5%) and the second factor glycerol concentration (1%, 2%). Data analyzed by analysis of variance (ANOVA) and tested signification by LSD. The observed parameter during the storage such as hardness, weight loss, soluble solids content, vitamin C and total acid. The result showed with analysis of variance (á=5%)theconcentration of carrageenan significantly on hardness, weight loss, and total acid of Strawberries. The interaction between carrageenan and glycerol concentration significantly on hardness (2ndday) and total acid (4th and 5th day) of strawberries during storage. The best treatment in this research is combination of carrageenan concentration 2.5% and glycerol concentration 2% (K5G2) able to inhibit decrease of hardness and change of total acid strawberries.Keywords: strawberry, carrageenan, glycerol, edible coating

PENGARUH GETARAN TERHADAP KERUSAKAN MEKANIS TOMAT (Lycopersicum esculentum Mill) Zelzha Arinnesia Varanita; Tamrin -; Agus Haryanto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 5, No 2 (2016)
Publisher : The University of Lampung

Mechanical damage that occurs in tomatoes only visible and probably most who do not know. Without realizingit experienced mechanical damage tomato fruit will make the tomatoes are not worth selling because the fruit isdamaged. This research aims to determine how much damage suffered mechanical damage tomatoes mechanicalvibrated at different times. Varieties of tomatoes used are tomato gondol at the age of 70-80 days of harvest. Inthis research, tomatoes put in a storage container as much as 3 squares and vibrated at different times. As manyas 20% of tomatoes which can not be used in the research because of a pest when planting and rub with a storagecontainer (pallet). The results showed that the tomatoes will suffer mechanical damage such as bruises, scars andwounds ruptured (perforated top). The length of time the magnitude of vibration could be the benchmark ofmechanical damage to the fruit. However, it must also show the hardness of tomatoes to be vibrated. Tomatoessuffered mechanical damage until the worst was bruised and perforated top so that the fruit is not worth selling.Mechanical damage which is obtained not only from research through visual or tangible, but found to be anumber. The highest value of weight loss is on T3L2 with a value of 2,07% by weight of the intensity valueshrinkage of 1,66%. Percentage of tomatoes are not worth selling at 6,79% due to the damage caused by theprovision of mechanical vibration, with wide intensity mechanical damage amounting to 3,08%.Keywords: Tomato (Lycopersicum esculentum Mill), mechanical damage, respiratory and climacteric.

Dissolved Phosphorus Of Phosphate Stones With Ultrasonic Waves As An Efforts Rahmat Ibnu Mas'ud; Sugeng Triyono; Sri Waluyo; Tamrin -
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 1, No 1 (2012)
Publisher : The University of Lampung

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Fertilizer is a material that can add nutrients to soil. Phosphate is one of essential elements of fertilizer for plants. Ultrasonic waves can potentially be used as a method to dissolve phosphorus from phosphate stone, by means of immersion in water and gived of ultrasonic waves. The aim of this study was to analyze the P content from phosphate stone that was dissolved in water and the excited by ultrasonic waves. The tests were the concentration of phosphate in water of 30, 60, and 90%, and the duration of ultrasonic wave (60 kHz) of 15, 30, and 60 minutes. The parameters observed were the levels of dissolved P (P2O5), pH value, and specific energy. The samples were analyzed, namely liquid and solid samples were separated after ultrasonic vibrate. The results of the analysis of the highest levels of soluble P from liquid samples are at 90% concentration, treatment time-vibrate 15 minutes, that is equal to 0.0415 mg/l, whereas the treatment of solid samples at concentrations of 60% , within 15 minutes, amounting to 1.38%. The measurement results show the solution pH is neutral phosphate after vibrated tend to alkaline with pH values between 7 – 8. Sample concentration of 60% treatment, 15 minutes and 90% concentration, treatment time of 15 minutes is the most efficient, because it uses only the smallest specific energy is 0.15 J/mg and 0.1 J/mg, can produce high levels of dissolved P. Keywords: fertilizer, phosphate stones, ultrasonic, P dissolved.

CHARACTERIZING OF ONGGOK FLOUR USING THREE DIFFERENT DRYING METHODS Sari, Marinda; -, Warji; Novita, Dwi Dian; -, Tamrin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 2, No 1 (2013)
Publisher : The University of Lampung

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The processing of cassava becoming tapioca flour will produce solid fiber waste called as onggok.Â Onggok can be used as raw material for making onggok flour.Â One of the processing steps on the producing of onggok flour is drying.Â In common practice, solar dryer is used but it takes long time and strongly depends on weather.Â The hybrid dryer (solar electrical energy), solar radiation dryer, and electrical dryer would be used in this research.Â The aims of this study were to determine and to compare whiteness degree, the degree of acidity (pH), and the characteristics of onggok flour (color and aroma) and its organoleptic justification of onggok flour dryed by the three different drying methods.Â The results showed that drying process under solar radiation dryer produced onggok flour at better color compared with the others, drying process using electrical dryer produced onggok flour at better aroma compared with the others, the best product based on organoleptic tests was onggokÂ flour dried by electrical dryer with color criteria a little white, the aroma criteria slightly cassava aromaed, and overall acceptance a bit like. Keywords: Onggok flour, drying, aroma, flour color

APLIKASI IRIGASI DEFISIT PADA PADI GOGO (Oryza sativa L.) VARIETAS INPAGO 9 made sudarmawan; RA Bustomi Rosadi; Sugeng Triyono
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 6, No 3 (2017)
Publisher : The University of Lampung

Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi irigasi defisit pada padi gogo (Oryza sativa L) varietas inpago 9. Penelitian ini dilaksanakan di dalam rumah plastik, laboratorium lapang terpadu, Universitas Lampung pada bulan November 2016 sampai dengan Maret 2017. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan empat taraf perlakuan, yaitu perlakuan ID1 ((0-20)-100)% AW,ID2 ((0-20)-80)% AW, ID3 ((0-20)-60)% AW, ID4 ((0-20)-40)% AW, dengan lima kali ulangan. Hasil penelitian menunjukkan bahwa, perlakuan irigasi defisit pada padi gogo (Oryza sativa L) varietas inpago 9 berpengaruh terhadap pertumbuhan tinggi tanaman, jumlah daun, jumlah anakan, jumlah malai, berat kering brangkasan atas, berat brangkasan bawah basah dan kering, dan gabah hampa. Perlakuan irigasi defisit pada padi gogo (Oryza sativa L) varietas inpago 9 tidak berpengaruh terhadap produksi tanaman padi gogo. Faktor tanggapan hasil terhadap air (Ky) menunjukan nilai Ky (Ky > 1). Hasil uji tanaman padi gogo, mengalami cekaman air yaitu pada perlakuan ID2 ((0-20)-80)% AW dan ID3 ((0-20)-60)% AW. Tanaman padi jika sensitif terhadap irigasi defisit produktivitas penggunaan air paling tinggi adalah ID1 ((0-20)-100)% AW dengan produktivitas rata-rata sebesar 0,78 gram/liter.Kata Kunci : irigasi defisit; fase tumbuh; padi gogo; produktivitas air tanaman.

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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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.

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