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Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Published by Universitas Mataram
ISSN : 23018119     EISSN : 24431354     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Terhitung sejak tahun 2014, Program Studi Teknik Pertanian Fakultas Teknolgi Pangan dan Agroindustri Universitas Mataram telah menerbitkan secara online Jurnal Ilmiah Rekayasa Pertanian dan Biosistem (JRPB) sehingga dapat diakses secara luas. Jurnal ini pada umumnya memuat hasil-hasil penelitian dari mahasiswa, peneliti, akademisi, praktisi, dan pemerhati di bidang teknik pertanian dan biosistem. JRPB berupaya menjaga eksistensi penerbitannya dan berharap jurnal ini dapat menjadi salah satu media publikasi bagi semua pihak yang meminati kajian-kajian ilmiah dalam bidang ilmu Teknologi Pertanian.
Arjuna Subject : -
Articles 218 Documents
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PENGARUH KOMPOSISI SUBSTRAT CAMPURAN KOTORAN SAPI DAN JERAMI PADI TERHADAP PRODUKTIVITAS BIOGAS PADA DIGESTER SEMI KONTINYU Agus Haryanto; Oktafri Oktafri; Sugeng Triyono; Muhammad Rizki Zulyantoro
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.901 KB) | DOI: 10.29303/jrpb.v7i1.105

Abstract

This study aims to determine the effect of substrate composition on biogas productivity from a mixture of cow dung and rice straw on semi-continuous digester. Rice straw used taken from Way Galih Village, South Lampung, and fresh cow dung was obtained from Laboratory in Department of Animal Husbandry, Faculty of Agriculture, University of Lampung. Biogas starter is filled with 26 liters of cow dung and water in 1: 1 ratio comparison based on weight. Then its being left for 4 day for stabilization. If the biogas production is stable, then substrate will be added with loading rate 0.5 liters / day, with 6 compositions of different cow dung and rice straw from the ratio of cow dung and elephant grass based on the following TS: P1 (75% : 25%), P2 (70% : 30%), P3 (65% : 35%), P4 (60% : 40%), P5 (55% :45%) dan P6 (50% : 50%). Parameters which observed in this study include daily temperature, pH, TS and VS substain, daily biogas volume, biogas productivity, and biogas quality. The results showed that in 6 treatments had the same average pH of 6,8. The average temperatures on the morning were 26,37 °C, 26,29 °C, 26,24 °C, 26,22 °C, 26,28°C, and 26,26 oC while in the afternoon respectively 29,58 °C, 29,47 °C, 29,48 °C, 29,49 °C,2 9,57 °C, and 29,61 oC. The total biogas production is 185,5 liter, 284,25 liter, 186,85 liter, 448,15 liter, and 108,55 liter, respectively for P1, P2, P3, P4, P5 and P6 with biogas productivity sequentially is 378,66 l/kg VSr, 684,87 l/kg VSr, 378,76 l/kg VSr, 1498,02 l/kg VSr, 587,21 l/kg VSr and 395,95 l/kg VSr. The quality of biogas through the flame test produces a bright blue flame color.
ANALISIS EKONOMI ALAT PENGERING BIJI KAKAO TIPE BAK SISTEM PENGHEMBUS UDARA PANAS (STUDI KASUS DI DESA PENENGAHAN KECAMATAN GEDONG TATAAN KABUPATEN PESAWARAN PROVINSI LAMPUNG) Thareh Kemal Damanta; Sandi Asmara; Dwi Dian Novita; Tamrin Tamrin
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.565 KB) | DOI: 10.29303/jrpb.v7i1.106

Abstract

Kakao adalah salah satu komoditas pertanian andalan dengan peranan penting dalam perekonomian Indonesia. Mutu biji kakao sangat dipengaruhi oleh kondisi kakao dan cara pengolahannya, salah satunya yaitu pengeringan. Alternatif proses pengeringan biji kakao yang dapat digunakan yaitu pengering tipe bak. Kelebihan dari alat ini yaitu waktu penjemuran lebih singkat, tidak memerlukan banyak tenaga kerja, suhu dan kecepatan proses pengeringan dapat diatur sesuai keinginan, dan kebersihan dapat diawasi sebaik-baiknya. Tujuan dari penelitian ini adalah untuk mengetahui keuntungan/ pendapatan per tahun yang akan diperoleh dan untuk mengetahui nilai kelayakan ekonomi dari alat pengering biji kakao tipe bak sistem penghembus udara panas di Desa Penengahan, Kecamatan Gedong Tataan, Kabupaten Pesawaran, Provinsi Lampung. Penelitian ini dilaksanakan pada bulan April - Mei 2018 di Desa Penengahan, Kecamatan Gedong Tataan Kabupaten Pesawaran, Provinsi Lampung. Data-data yang diperlukan dalam melakukan analisis ekonomi ini diperoleh dari data kuantitatif yang didukung oleh data kualitatif, hal ini dilakukan untuk mendapatkan hasil yang akurat. Data kuantitatif diperoleh dengan mewawancarai secara langsung petani pemilik alat menggunakan daftar pertanyaan (kuesioner) sebagai alat bantu pengumpulan data. Sedangkan data kualitatif diperoleh dengan melakukan pengamatan atau pengukuran langsung di lapangan. Data-data tersebut diisi kedalam tabel yang sesuai dengan data dan rincian biaya yang telah dikeluarkan. Hasil penelitian menunjukkan bahwa pendapatan per tahun dari usaha pengeringan ini yaitu sebesar Rp 42.242.668,01/tahun, dan dinilai layak secara finansial yang ditunjukkan dengan nilai NPV (Rp 165.318.779,07/tahun) bernilai positif, B/C Ratio (1,07) > (1), dan IRR (554,36%) > suku bunga bank (7%). Berdasarkan analisis sensitivitas, perubahan terhadap kenaikan biaya produksi, penurunan penerimaan, dan penurunan jam kerja alat menunjukkan bahwa usaha pengeringan biji kakao tetap layak untuk dilakukan.
MODIFIKASI ASPEK RASIO SUDU KINCIR ANGIN DAN GEAR RASIO PADA AERATOR BEBASIS TEKNOLOGI POMPA SPIRAL BERTENAGA AIR wenny andriyani; Gunomo Djoyowasito; Rifaldi Aprilianto; Ary Mustofa Ahmad; Musthofa Lutfi
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (787.136 KB) | DOI: 10.29303/jrpb.v7i1.107

Abstract

Peningkatan produktivitas tambak udang di Indonesia dilakukan dengan tetap menjaga kualitas air tambak menggunakan aerator. Penelitian ini bertujuan untuk meningkatkan kecepatan putar dengan modifikasi aerator yang memanfaatkan teknologi pompa spiral yang kemudian digerakkan oleh kincir angin. Metode penelitian dilakukan dengan beberapa tahapan, yaitu: (1) Pembuatan rancangan modifikasi aspek rasio dan gear rasio (2) Persiapan Komponen kincir angin dan gear rasio, (3) Perakitan alat, (4) Uji kinerja alat. Modifikasi dilakukan pada kebutuhan kecepatan putar aerator dengan aspek rasio kincir angin dan gear rasio. Aspek rasio yang digunakan pada sudu kincir angin sebesar 0,833 dan 2,167, sementara gear rasio yang digunakan adalah 1:10 dan 1:5. Parameter yang diukur adalah kecepatan angin, kinerja aerator (kecepatan putar kincir angin, kecepatan putar pompa spiral, daya, debit, tinggi tekan), dan kualitas air (oksigen terlarut). Hasil uji kinerja alat dengan kecepatan angin berkisar antara 0,62 - 4,65 m/s. Kecepatan putar teoritis yang terukur adalah sebesar 45,4632. Sementara untuk reduksi putar memiliki nilai rata-rata sebesar 0,41. Daya teoritis terkecil yang dihasilkan oleh kecepatan angin terkecil, yaitu sebesar 0,62 m/s. Daya yang dihasilkan sebesar 0,1967 Watt. Kemudian daya, debit air, dan tinggi tekan rata-rata 24.02834 watt, 15.52008 cm3/s, 30.16 cm. Sementara oksigen terlarut yang dihasilkan berkisar antara 4,4 – 11,9 mg/L. Aerator dengan aspek rasio 0,833 dan gear rasio 1:10 serta aerator dengan aspek rasio 2,167 dan gear rasio 1:5 mampu menghasilkan kecepatan putar, daya, dan debit air yang lebih baik. Namun, untuk tinggi tekan aerator yang belum dimodifikasi menghasilkan nilai yang lebih tinggi. Sementara kedua aerator mampu menghasilkan oksigen terlarut berkisar 4 – 11 mg/L.
KAJIAN PROSES DAN ANALISIS KELAYAKAN FINANSIAL USAHA UBI CILEMBU BAKAR Ahmad Thoriq; Asri Widyasanti
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.232 KB) | DOI: 10.29303/jrpb.v7i1.109

Abstract

Cilembu sweet potato are local superior varieties from Cilembu Village, Sumedang District, West Java. Sweet taste like honey is produced through the process of planting at a certain height, ripening after post-harvest, and baked using an oven. The policy of converting fuel oil to gas fuel has implications for the baking of Cilembu yams which previously used Liquified Petroleum Gas (LPG) ovens. But along with the limited availability and the high price of kerosene demanding the modification of the grill oven using Liquified Petroleum Gas. This study aims to conduct a process study and analyze the financial feasibility business of cilembu sweet potato baking. The method used in this study is an experimental method that was collaborated with descriptive methods to analyze the financial feasibility of cilembu sweet potato baking. The results showed that the average temperature of the baking room was 138 0C, effective baking capacity of 6.64 kg / hour, consumption rate of LPG 0.44 kg / hour, rate of decrease in average weight of Cilembu sweet potato during the baking process of 5.66 grams per minutes for grade C and 3.68 grams per minute for grade B with yields of cilembu sweet potato baking produced at 77.38% and loss weights of 22.62%. Based on the financial feasibility analysis obtained HPP Rp. 14,132.72 / kg, NPV Rp. 73,154,539 / month, BCR 1.28, IRR 20.06% and capital will return in the eighth month.
THE EFFECT OF CONVECTIVE FIXED BED DRYING BASED ON A SOLAR COLLECTOR AND PHOTOVOLTAIC (CSD) TO THE QUALITY ATRIBUTES OF RED PEPPER COMPARED WITH CONVENTIONAL CONVECTIVE FIXED BED DRYING (CCD) Siti Asmaniyah Mardiyani; Sumardi Hadi Sumarlan; Bambang Dwi Argo; Amin Setyo Leksono
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 1 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.368 KB) | DOI: 10.29303/jrpb.v7i1.110

Abstract

The effect of conventional convective drying (CCD) and convective solar drying (CSD) based on a solar collector and photovoltaic on the quality of dried red pepper was researched. The study was aimed to determine the effect of five drying system (CCD 50°C, CCD 60°C, CCD 70°C, CSD, and open sun drying) on the quality attributes of dried red pepper. The quality observed were rehydration ratio, ascorbic acid, capsaicin, non-enzymatic browning index, anthocyanin, and carotenoids. The results of the study confirmed that the drying system significantly affected the quality attributes of dried red pepper except for anthocyanin. The CSD had a satisfactory result, shown by some attributes (carotenoids, ascorbic acid, and ratio) which were not statistically different from the quality of dried red pepper gained from CCD 50°C.
PERUBAHAN SIFAT FISIK BUAH TOMAT SETELAH PROSES TRANSPORTASI Ida Ayu Widhiantari; Sandra Sandra; Gunomo Djoyowasito
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 2 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.993 KB) | DOI: 10.29303/jrpb.v7i2.69

Abstract

During the activities of transportation of tomatoes can be damaged due to the vibration frequency of transport machinery and also the transport time. The presence of vibration during the transportation process of tomato fruit can affect change in texture of tomatoes. Optimization is used in this study in order to obtain optimum quality of tomato fruits after simulation transport. Optimization by using Response Surface Methodology (RSM) methods Central Composite Design (CCD) with two independent variables are the vibration frequencies (3 Hz, 6Hz, and 9Hz) and the duration of vibration (90, 120, and 150 minutes) as well as the texture of tomatoes as a response. The optimum conditions obtained in the vibration frequency of 2,32 Hz and transport simulation time 133,42 minutes with optimum texture value of tomatoes is 0,147768 with a value of desirability that 0,928.
RANCANG BANGUN MESIN PRODUKSI ASAP CAIR DARI TEMPURUNG KELAPA BERBASIS TEKNOLOGI CYCLONE-REDISTILLATION Muhammad Fathussalam; Angky Wahyu Putranto; Bambang Dwi Argo; Arta Harianti; Arsyika Oktaviani; Firda Pramesti Puspaningarum; Sellyan Lorenza Olanda Putri
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 2 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.715 KB) | DOI: 10.29303/jrpb.v7i2.113

Abstract

The higher of coconut crop production in Indonesia has positively correlated with the amount of coconut shell waste produced which is difficult to decompose by microorganisms. Therefore, the utilization of coconut shell waste into charcoal and liquid smoke has been carried out in recent years. During this time, the conventional process of coconut shell-liquid smoke (CS-LS) takes 3-5 days and produces grade C liquid smoke in low volume. Hence, this study aims to design CS-LS production machine based on cyclone-redistillation technology which which can increase the volume of liquid smoke produced. In this study, the method used was engineering includes structural and functional design also testing performance both apparatus and product. The performance of CS-LS production machine was analyzed by volume for each grades (grade A, B and C). The result showed that CS-LS production machine based on cyclone-redistillation has been production according to specifications, with the total dimension of machine was 132 cm length, 100 cm width and 145 cm height. The volume of grade A CS-LS production was 65 L, whereas the grade B and C volumes was 10 L and 25 L, respectively, with a shorter total production time than conventional methods in SMEs. Therefore, design of CS-LS production machine based on cyclone-redistillation technology has great potentially applied in SMEs for producing liquid smoke in Indonesia to increase productivity and quality of CS-LS.
PENENTUAN LIKU KALIBRASI DEBIT (RATING CURVE) PADA MUSIM HUJAN DI DAERAH ALIRAN SUNGAI (DAS) DELI Andi Setiawan; Edi Susanto
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 2 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (802.169 KB) | DOI: 10.29303/jrpb.v7i2.117

Abstract

Discharge rating curve is a curve that shows the relationship between water level and river flow so that it can be used to predict the amount of discharge in the river. The purpose of this research was to find the equation of the discharge rating curve in the Deli watershed. This research was carried out by analyzing river water discharge and taking water level data using a water level logger with a minimum of twice a week. River water discharge at the study location has a varied value i.e 0,74 – 3,28 m3/sec with an average of 1,06 m3/sec. The determination of the equation of the discharge rating curve uses several methods namely linear, polynomial, power function, logarithmic, and exponential. The results of the study show that the equation with the second order polynomial method has the best level of correlation (r) and RMSE with value r 0.986 and RMSE 0.011. The rating curve equation obtained was Q = 18,97 (h)2 – 1,372(h) + 0.190.
ANALISIS VARIASI JENIS DAN PANJANG SUMBU TERHADAP PERTUMBUHAN TANAMAN PADA SISTEM HIDROPONIK Ansar Ansar; Guyup Mahardhian Dwi Putra; Opan Sopiandi Ependi
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 2 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.472 KB) | DOI: 10.29303/jrpb.v7i2.124

Abstract

This study aims to observe the effect of type and length of axes on the rate of growth and development of mustard (Brassica Juncea L.) plants, analyzing the effect of water circulation on the growth and development of mustard plants. This study used two treatments, namely the type of axis and the length of the axis. Each treatment consisted of 12 repetitions, so there were 24 replications. In this study, we want to examine related parameters, namely air temperature, relative humidity, light intensity, evapotranspiration, and plant growth. The results of the observation showed that the highest light intensity in the T2 planting room, the highest evapotranspiration in the T2, then plant height were obtained in the T2 planting area of coconut fiber axis with water circulation system.
Sifat Fisik Kacang Tanah Pada Varietas Talam 1, Varietas Talam 2 Dan Varietas Takar 2 Isnaini Puspitasari; Sandra Sandra; Yusuf Wibisono
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 7 No 2 (2019): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.019 KB) | DOI: 10.29303/jrpb.v7i2.127

Abstract

The physical properties of agricultural products are very important for designing tools and machines for processing products. The quality of peanuts is determined by physical properties. The physical properties that determine the quality of peanuts are the air content and physical quality of seeds (whole seeds, wrinkled seeds, and damaged seeds). The physical properties of peanuts must be considered the size of peanuts (area and volume), true density, bulk density, porosity, angle of friction used for drying and storage. On Measuring the Physical Properties of Peanuts Various Types of Variations Each of which Has Different Values. In the measurement of the average large dimension value of the Talam 2 variety has a number of 14.48 ± 0.97, the average width value required by Takar 2 and Talam 1 varieties is 8.55 ± 0.57 and. Measure 2 has an arithmetic mean diameter value, geometric mean diameter, surface area, and overall volume as a whole - 9.9 ± 0.56, 9.62 ± 0.36, 291.05 ± 22.07, 468 , 03 ± 52.59. This happens because the Takar 2 variety peanut has a larger seed shape and more containing seeds. Glass is a friction surface that has the highest coefficient of static friction.

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