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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 7, No 3 (2018): Desember" : 7 Documents clear
PENGARUH SUHU TERHADAP PERMEABILITAS GAS PADA PLASTIK FILM UNTUK PENGEMASAN SECARA ATMOSFIR TERMODIFIKASI Rokhani Hasbullah; Agus Ghautsun Niam; Lilik Pujantoro; Sutrisno Mardjan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.64 KB) | DOI: 10.23960/jtep-l.v7i3.133-141

Abstract

Pengemasan secara atmosfir termodifikasi (MAP) pada penyimpanan dingin merupakan cara yang tepat untuk menjaga kualitas dan kesegaran produk yang diolah secara minimal. Tujuan dari penelitian ini adalah untuk mengkaji pengaruh suhu terhadap permeabilitas gas pada plastik film untuk pengemasan secara atmosfir termodifikasi pada produk olahan minimal. Plastik film jenis polietilen stretch (ketebalan 10 mm) dan polipropilen (ketebalan 10 mm) digunakan dalam penelitian ini. Permeabilitas gas plastik film terhadap gas O2 dan CO2 dianalisis menggunakan kromatografi gas HP 5890 pada suhu 5, 10, 15, 20, dan 25 oC berdasarkan metode konsentrasi meningkat kondisi stabil. Hasil penelitian menunjukkan bahwa permeabilitas gas meningkat dengan meningkatnya suhu penyimpanan. Model persamaan Arrhenius mampu menggambarkan pengaruh suhu terhadap permeabilitas gas sangat baik dengan nilai koefisien determinasi (R2) berkisar antara 0.9586 dan 0.9943.Kata kunci: permeabilitas gas, film polimer, modifikasi kemasan atmosfer, pengolahan minimal.
GASIFIKASI LIMBAH TEMPURUNG KEMIRI SEBAGAI ENERGI ALTERNATIF MENGGUNAKAN UPDRAFT GASIFIER PADA LAJU ALIRAN UDARA BERBEDA Jemseng Carles Abineno; Johny Agustinus Koylal
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.416 KB) | DOI: 10.23960/jtep-l.v7i3.175-180

Abstract

Kemiri (Aleurites moluccana) merupakan salah satu tanaman yang polpulasinya cenderung dengan produktivitas sebesar 0,6 ton/Ha pada tahun 2014. Hasil pengolahan kemiri menghasilkan limbah berupa tempurung mencapai 193,36 kg/ton. Analisis nilai kalori yang terkandung dalam tempurung kemiri mencapai 4920,25 kal/gr. Hal ini menunjukkan bahwa energi yang terkandung pada tempurung kemiri sebesar 4.920 kkal/ton. Data tersebut menjelaskan bahwa energi yang dihasilkan dari tempurung kemiri mencapai 319,56 MJ, namun sampai saat ini  limbah tempurung kemiri belum dimanfaatkan. Limbah pertanian yang umumnya berupa padatan, dapat dimanfaatkan energinya dalam bentuk yang lebih sederhana melalui proses gasifikasi. Selain menghasilkan gas yang mudah terbakar, proses ini lebih ramah lingkungan jika dibandingkan dengan pembakaran langsung. Salah satu cara untuk konversi limbah tempurung kemiri adalah melalui proses gasifikasi. Gasifikasi adalah proses konversi biomassa menjadi bahan bakar berbentuk gas oleh adanya proses oksidasi parsial (oksigen terbatas) melalui reaktor yang disebut  updraft gasifier. Level perlakuan (laju aliran udara) yang dicobakan untuk menghasilkan syngas yaitu: v1 (366.07 lpm), v2 (462.09 lpm), dan v3 (545.11 lpm).Hasil penelitian menunjukkan updraft gasifier dapat menghasilkan gas (syngas), dan digunakan sebagai sumber energi panas untuk proses penyangraian dan pengeringan. Kinerja gasifikasi terbaik  pada updraft gasifier terjadi pada laju aliran udara v2 (462.09 lpm) yaitu  lama  penyalaan syngas mencapai 48 menit/3 kgbahan atau 16 menit/kgbahan. Suhu penyalaan berada pada kisaran  1550C - 6000C. Sumber energi panas yang dihasilkan dari biomassa tempurung kemiri dapat digunakan untuk proses pengeringan dan penyangraian bahan hasil pertanian. Kata Kunci : Gasifikasi, tempurung,  kemiri, gasifier, updraft,
PENGARUH WAKTU PEMBERIAN NUTRISI PADA PRODUKSI BENIH KENTANG SECARA AEROPONIK DENGAN APLIKASI ROOT ZONE COOLING DI DATARAN RENDAH TROPIS Eni Sumarni; Noor Farid; Loekas Soesanto; Jajang Juansah
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.685 KB) | DOI: 10.23960/jtep-l.v7i3.142-150

Abstract

Planting potatoes in the tropical lowlands as an effort to reduce the adverse effects of planting in the highlands such as erosion, pests and plant diseases has been carried out and the tubers have been successfully obtained. Planting of potato seeds was carried out with an aeroponic system and climate modification in the root zone cooling environment. Climate modification is carried out at an altitude of 250 m asl and <125 m asl. The stability of the temperature in the aeroponic chamber can be maintained by regulating the time of spraying cold nutrients through the nozzles to the root area. However, the importance of the time to provide nutrition in order to maintain the optimal temperature of the root area in aeroponic systems in the lowlands has not been widely reported scientifically. The purpose of this study was to obtain the appropriate time for nutrition in order to maintain optimal chamber temperature and to have an effect on the growth and yield of potato seeds. The research was conducted in the greenhouse of the Faculty of Agriculture, Jenderal Soedirman University, Purwokerto, Central Java, Indonesia. Height of place <125 m above sea level. The study was conducted from July to September 2017. The factors that were tried in the study were as follows: 1. Length of time for nutrition (T): T1: 2.5 minutes OFF and 15 minutes ON; T2: 5 minutes OFF, 15 minutes ON, T3: 10 minutes OFF, 15 minutes ON, T4: 15 minutes OFF, 15 minutes ON, 2. Varieties (V): V1 (Atlantic), V2 (Granola). Growth parameters observed: plant height, number of leaves, number of tubers, tuber weight. Experiment using a randomized block design with 3 replications. The data were analyzed by F test and continued with Duncan’s Multiple Range Testof 5% level.The results showed that the duration of nutrient administration by setting a timer gave different results on the growth and development of aeroponic plants of potato seeds in the lowlands 125 m above sea level. The duration of nutrition administration 2.5 minutes OFF gave the highest number of tubers and tuber weight compared to the duration of nutrition 5 minutes, 10 minutes and 15 minutes OFF. The number of tubers obtained is 7.3 tubers / plant with boto an average of 2 mg. The duration of nutrition is 5 minutes, 10 minutes and 15 minutes OFF does not produce tubers.
Penggunaan Teknologi UV-Vis Spectroscopy untuk Membedakan Jenis Kopi Bubuk Arabika Gayo Wine dan Kopi Bubuk Arabika Gayo Biasa Diding Suhandy; Eny Supriyanti; Meinilwita Yulia; Sri Waluyo
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.797 KB) | DOI: 10.23960/jtep-l.v7i3.123-132

Abstract

Salah satu kopi spesialti Indonesia adalah kopi Arabika Gayo wine yang merupakan varietas hasil seleksi yang dikembangkan oleh petani Indonesia.  Penelitian ini merupakan penelitian kualitatif yang bertujuan untuk membangun dan menguji model diskriminasi untuk mengidentifikasi dan mengklasifikasikan kopi bubuk Arabika Gayo wine dan kopi bubuk Arabika Gayo biasa.  Komposisi bahan yang digunakan dalam penelitian ini yaitu 1 gram dengan jumlah 100 sampel kopi bubuk Gayo wine, dan 100 sampel kopi bubuk Gayo biasa.  Pengujian dilakukan pada bubuk kopi berukuran 0,297 milimeter (mesh 50).  Setiap sampel diekstraksi menggunakan air aquades dengan suhu 90-98ºC, kemudian disaring dan diencerkan menggunakan aquades dengan perbandingan 1:20.  Pengambilan spektra pada sampel hasil ekstraksi dilakukan sebanyak 2 kali pengulangan untuk setiap sampel menggunakan Spektrometer UV-Vis Genesis 10s pada rentang panjang gelombang 190-1100 nm.  Data spektra diolah menggunakan metode PCA untuk melihat pengelompokkan semua data.  Setelah itu, untuk model diskriminasi dibangun menggunakan metode SIMCA untuk spektra original dan petreatment.  Hasil klasifikasi terbaik yaitu pada metode multiplicative scatter correction (MSC) dan moving average 9s yang menjelaskan nilai keragaman data dengan nilai PC1 97% dan PC2 3%.  Sedangkan untuk klasifikasi data diperoleh nilai akurasi (AC) 100%, spesifisitas (SP) 100%, dan sensitivitas (S) 100%, dengan nilai eror (FP) 0%.  Berdasarkan hasil ini pada semua pengujian. maka model SIMCA yang dibangun dapat mengidentifikasi dan mengklasifikasikan sampel kopi prediksi ke dalam kelas yang sesuai dengan baik. Kata Kunci:   Kopi Arabika Gayo biasa, kopi Arabika Gayo wine, UV-Vis spectroscopy, PCA, SIMCA.
Uji Kinerja Mesin Pencacah Plastik (Studi Kasus Bank Sampah Tasikmalaya (BST) di Kecamatan Singaparna, Kabupaten Tasikmalaya) wahyu kristian sugandi; Asep Yusuf; Totok Herwanto; Sidik Maulana
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (360.037 KB) | DOI: 10.23960/jtep-l.v7i3.151-159

Abstract

ABSTRACTGarbage is solid waste, consisting of organic and inorganic substances or materials that are considered to have no longer beneficial and must be managed properly so as not to endanger the environment. Garbage has been a complicated problem especially in big cities. Singaparna, Tasikmalaya  has been produced 154.72 m3 of plastic waste every day. Plastic waste collected by BST is only sort and sold at low prices to the city. To increase the sale value, the plastic waste needs to be chopped in advance. Therefore, the Laboratory of Agricultural Equipment and Machinery FTIP Unpad had developed a plastic waste counting machine to be applied to the community, especially in BST to produce the desired plastic count. However, this machine not yet performance testing data, so it needs to do research regarding performance tests. The purpose of this study is to examine the performance of the plastic counter machine which includes measuring the capacity of the machine, calculating the rendering yield, calculating the length of the enumeration measuring the engine noise level and measuring the engine vibration level. The research method used had descriptive analysis method, it was measuring and calculating the structural components and engine performance. The results of the study in measuring the performance test showed that the actual capacity of the machine was 19.18 kg / hour, the enumeration chopper was 84%, the percentage of plastic chopping length was 86.89%, the noise level was 104.77dB, and the engine vibration was 18.3 mm / s. Key Note : plastic chopper, performance test, tasikmalaya garbage bank
Kinerja Mesin Pemisah Potongan Tangkai dan Daun Teh Agus Sutejo; Sutrisno Suro Mardjan; Wawan Hermawan; Desrial Desrial
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.239 KB) | DOI: 10.23960/jtep-l.v7i3.160-167

Abstract

The quality of dried tea depends on the condition of raw materials and processing methods. The problem in the tea processing is the mixture of pieces of stalks and leaves. This research aims to examine the performance of stalks and leaves machine separator based on the difference of suction velocity and the terminal velocity of the material. The separator was designed according to the physical and aerodynamic properties of tea leaves. The performance of the separator was done by calculating the separating efficiency of five combined treatments (P, P1a, P1b, P0a, and P0b) and calculating the separating capacity with three feeding treatments (0.4 kg/sec, 0.5 kg/sec, and 0.6 kg/sec). Physical property observation of the tea leaves obtained an average mass 0.143 kg/m² which means the theoretical suction pressure needed is about 1.4 Pa. The actual terminal velocity measured as 7.5 m/sec for the stalk pieces and 3.0 m/sec for the leaf pieces. The optimum separating efficiency was obtained at P treatment, it was about 97.6 %, with average suction ir velocity 3.15 m/s. Optimum separating capacity was obtained about 354.29 kg/hour.
UNJUK KERJA MESIN PEMOTONG PADI TIPE GLX 328-RH PADA BEBERAPA RPM DI LAHAN KERING Muhamad Teguh Angga Saputra; Siti Suharyatun; Sandi Asmara; Agus Haryanto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 3 (2018): Desember
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.355 KB) | DOI: 10.23960/jtep-l.v7i3.168-174

Abstract

Perkembangan alat mesin pertanian sangat pesat, mulai dari alat tradisional ani-ani  yang hanya dapat memotong malai padi hingga combine harvester yang dapat memotong, merontokan, hingga pengarungan gabah. Kondisi keuangan dan lahan yang berbeda menyebabkan petani harus memilih mesin tepat guna. Salah satu alternatif mesin yang dapat digunakan untuk lahan yang tidak terlalu luas yaitu mesin pemotong padi (paddy mower) tipe GLX 328-RH. Tujuan dari penelitian ini untuk mengetahui kapasitas kerja, kehilangan gabah (losses), dan konsumsi bahan bakar serta analisis ekonomi penggunaan mesin pemotong padi tipe GLX 328-RH untuk pemanenan. Penelitian ini terdiri dari tiga tahapan utama, yaitu persiapan mesin dan lahan, pengujian performansi mesin dan analisis data.  Parameter yang diamati adalah kapasitas kerja mesin, persentase kehilangan gabah, dan konsumsi bahan bakar. Hasil penelitian menunjukan bahwa kapasitas kerja mesin pemotong padi dengan RPM 3863 0,019 ha/jam dan RPM 5000 0,022 ha/jam lebih besar dibanding sabit 0,013 ha/jam. Losses cenderung menurun dengan meningkat nya kecepatan RPM. Losses pada RPM 1824 = 1,91%, RPM 3863 = 0,84%, RPM 5000 = 0,56%. Konsumsi bahan bakar pada RPM 1824 = 100,78 l/ha, RPM 3863 = 49 l/ha, dan RPM 5000 = 35,67 l/ha. Nilai break even point (BEP) penggunaan mesin pemotong padi tipe GLX 328-RH sebesar 4,64ha. NPV mesin pemotong padi tipe GLX 328-RH sebesar Rp 1.006.632,03/year. B/C Ratio mesin pemotong padi  sebesar 1,025. IRR mesin sebesar 39,103%, dan pay back periode tercapai pada 2,07 tahun. Kata Kunci: Padi, mesin pemotong padi, kapasitas kerja, unjuk kerja

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