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Agus Sutejo
Departemen Teknik Mesin Dan Biosistem, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Kampus IPB Darmaga, Jl. Lingkar Akademik, Dramaga, Bogor, Jawa Barat, Indonesia 16680
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Design and Performance Test of Horizontal Type Ginger Chopper Machine Agus Sutejo; Abdul Khair
Jurnal Agricultural Biosystem Engineering Vol 1, No 2 (2022): Juni 2022
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (944.623 KB) | DOI: 10.23960/jurnal abe.v1i2.6110

Abstract

Ginger is a horticultural plant that can be used as a spice or medicine. Slicing is the process of reducing the size by using a knife to get the length of the pieces that are smaller and thinner in a transverse, oblique or parallel direction to the material to be cut. The traditional slicing process is still relatively time consuming so it is not practical and cannot meet the needs. This study aims to design and performance test slicing machine type horizontal for red ginger and elephant ginger. The design is carried out on the hopper component and slicing system. The slicing performance test was carried out at rotational speeds of 46.67 rpm, 56 rpm and 65.33 rpm using 2 and 4 slicing blades with three replications. The results of the design show that the hopper using a clamping system can accommodate 13 kg of ginger. The testing results of the slicing system got the largest machine performance efficiency of 87.4% at rotational speed of 56 rpm with 2 blades with a slicing of 262 kg/hour. This slicing is very large compared to traditional slicing (3 kg/hour) and greater than previous studies with a slicing machine that uses a pressing mechanism (128 kg/hour).
Pengembangan Sistem Pendeteksi Mutu Buah Tomat Cherry Berdasarkan Warna Menggunakan Sensor Optis TCS230 I Dewa Made Subrata; Achmad Zurhafidz Ramadhan; Agus Sutejo
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 10 No 2 (2022): 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 (577.428 KB) | DOI: 10.29303/jrpb.v10i2.389

Abstract

Tomat cherry adalah salah satu jenis tanaman yang kematangan buahnya mengalami perubahan warna dari warna hijau menjadi merah. Buah tomat cherry sangat digemari di kalangan masyarakat karena rasanya manis keasaman. Mutu buah tomat cherry ditentukan berdasarkan warna dan umumnya dipasarkan dalam tiga kelas mutu, yaitu tomat hijau, oranye, dan merah. Penelitian ini bertujuan untuk mengembangkan sistem pendeteksi mutu buah tomat cherry berdasarkan warna menggunakan sensor optis TCS230 dan mikrokontroler Arduino Mega 2560 sebagai pengolah informasi. Sistem pendeteksian tomat cherry dirancang menggunakan sabuk conveyor yang dipasangi sensor optis TCS230. Pengujian kecepatan conveyor optimum dilakukan dengan menggerakkan tomat yang diletakkan di atas conveyor mulai kecepatan 0 cm/s sampai 60 cm/s. Buah tomat cherry dengan tiga tingkat mutu selanjutnya diletakkan di atas conveyor dengan urutan secara acak pada jarak perlakuan antar tomat sebesar 3 cm, 5 cm, 7 cm dan dengan kecepatan conveyor optimum hasil pengujian tahapan sebelumnya.  Hasil pengujian menunjukkan kecepatan pergerakan tomat optimum pada saat pendeteksian adalah 30 cm/s dengan jarak antar tomat sebesar 7 cm. Persentase keberhasilan perdeteksian mutu untuk tomat warna merah, oranye, dan hijau secara berurutan adalah 89%, 98%, dan 100%. Data pengujian tersebut menghasilkan kesimpulan bahwa sistem pendeteksi mutu yang dikembangkan sudah bekerja dengan baik walaupun ketelitian pedeteksian mutunya masih perlu ditingkatkan untuk tomat merah dan oranye.
Analisa Pengaruh Posisi Biji pada Malai Terhadap Gaya Perontokan Beberapa Varietas Padi Ajat Zatmika; Tineke Mandang; Wawan Hermawan; I Dewa Made Subrata; Agus Sutejo
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 11 No 2 (2023): 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 | DOI: 10.29303/jrpb.v11i2.547

Abstract

Quantity and quality of rice grain can be developed through more efficient and accurate threshing methods based on the measurement of threshing force (TF). This study aimed to investigate the influence of rice varieties and grain position on the panicle on the threshing force (TF) results. Rice grains from several harvested varieties were dried to a moisture content level of 12% and prepared for threshing force (TF) testing. The research design used was a 2-factor completely randomized design with 3 replications. The first factor was rice varieties consisting of 4 levels: Sintanur, Siliwangi, Pajajaran, and Cakrabuana. The second factor was grain position on the panicle, consisting of 3 levels: upper, middle, and basal. Threshing force (TF) values were tested for 12 treatment combinations. The obtained data were analyzed using analysis of variance (ANOVA) followed by Duncan's multiple range test (DMRT) at a significance level of 5%. The results indicated that rice varieties had a highly significant effect on the threshing force (TF). On the other hand, grain position on the panicle had a non-significant effect on the threshing force (TF). The rice variety that produced the highest average threshing force (TF) value was Cakrabuana with 0.51 N, followed by Siliwangi with 0.50 N, Sintanur with 0.43 N, and Pajajaran with 0.35 N. The upper position of the grains on the rice panicle yielded the lowest average threshing force (TF) value of 0.41 N, compared to the middle position with 0.46 N and the basal position with 0.47 N.
Uji Performansi Mesin Penepung Tipe Palu (Hammer Mill) Untuk Penepungan Hotong (Setaria Italica L.) Sutejo, Agus; Kurniasari, Rahma Sholihah; Wicaksono, Dionisius Dwi
Jurnal Agricultural Biosystem Engineering Vol 2, No 2 (2023): June 2023
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v2i2.7464

Abstract

Indonesia has a high source of biodiversity but consumption patterns still depend on rice as a basic food needs containing carbohydrates. Food diversification needs to be done to achieve food diversification, especially plants that can grow on dry land such as hotong plants. Hotong is a plant that grows a lot in Indonesia but still has postharvest constraints on the flouring process. Therefore, the study was conducted to determine the performance of hammer mill machine and compare with disc mill. The research was conducted in PT. Daud Teknik Maju Pratama in July 2022 with materials used 500 grams each on each test. The rotational speed tested on the hammer machine is 2887 rpm, 3608 rpm, and 4330 rpm, while the disc mill machine is 4485 rpm. The test was carried out one pass with three repetitions for each sample and the quality of flouring was tested using an 80 mesh. Performance test results showed the highest capacity of using hammer mill machine 4330 rpm, while the highest yield and the lowest scattered shrinkage using disc mill. Furthermore, the flour milling using both machines sifted using mesh 80 and flour that passes more produced from milling hammer mill machine 4330 rpm of 45.111%. The power required by the hammer mill machine to milling 500 grams of hotong is 5107,34 watts.Keywords: disc mill, hammer mill, hotong, milling
Optimasi Kecepatan Putar dalam Peningkatan Mutu Biji Kemiri pada Mesin Pemecah Cangkang Biji Kemiri (Aleurites moluccana willd.) Sutejo, Agus; Fajri, Rahmatul; Sucahyo, lilis
Jurnal Agricultural Biosystem Engineering Vol 2, No 1 (2023): March 2023
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v2i1.6751

Abstract

Postharvest handling of candlenut in the traditional way is less effective and efficient. A worker is only able to break as much as 9–10 kg of candlenut/day and this also causes high work fatigue, besides thas many kernels are broken and destroyed (percentage og intact round kernels is only 40–60 %) so the price of candlenut becomes cheaper. Therefore, a candlenut crushing machine is needed with an optimum rorational speed that able to provide optimal and consistent energy to candlenuts crushing result. The candlenut material was dried at at 90 ˚C for 3 and 4 hours, then put it in ice water at 5 ˚C for 15 minutes. It was drained for 20 minutes and a drop test was carried out to find the optimum energy and rotational speed in cracking the candlenut. The result of rotaional speed are set up on the candlenut shell breking machine. Optimum solving result obtained of 490,5 Joules. Equivalent to candlenut dropped from a height of 5 meters with a rotating speed of 337,88 rpm. Keywords:  Candlenut, Post Harvest, Rotational Speed
Performance Test of Hotong Seed Billing Machine (Setaria italica (L.) P. Beauv) Abrasive Roll Type with Grinding Stone Sutejo, Agus; Abdillah, Kemas Asror; Sucahyo, Lilis; Wicaksono, Dionisius Dwi; Pramuhadi, Gatot
Jurnal Agricultural Biosystem Engineering Vol 2, No 3 (2023): September 2023
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v2i3.8059

Abstract

Indonesia has a lot of diversity, one of which is in food. Carbohydrates are basic food needs that must be met, in Indonesia there is the potential for various alternative foods. One of the alternative food ingredients producing carbohydrates is hotong. Hotong is a plant that is often found in Indonesia but has post-harvest constraints, namely in the sowing process. Therefore, research was conducted to determine the performance of an abrasive roll type grinding machine with the characteristics of hotong seeds. The research was conducted at PT. Daud Teknik Maju Pratama in November 2022. The treatment of hotong seeds that are sprayed as many as three passes with various levels of rpm speed, namely 806, 940, and 1128 rpm and carried out three repetitions at each rpm. The performance test results of the crushing machine showed the highest scattered capacity and shrinkage at a rotating speed of 1128 rpm, the highest yield and effectiveness of skin separation at a speed of 806 rpm, while at the highest polishing quality at a speed of 940 rpm. Rotating speed affects the sowing results, the faster the engine rotation speed, the quality and capacity of the sowing will increase. In addition, the tilt angle of the machine also affects the result of the sowing capacity. The terminal velocity value is influenced by the weight of the hotong seeds, the higher the weight on the sample, the higher the terminal velocity value obtained. Keywords:  Abrasive Roll, Hotong, Polisher.
Pelatihan Deliniasi Wilayah Berdasarkan Citra Satelit Google Earth Pada Guru MGMP Geografi Kota Madiun Makhmudiyah, Nurul; Sutejo, Agus; Murtini, Sri; Sri Utami, Wiwik; Fahrudin Fadirubun, Fahmi; Hariyanto, Bambang; Wirabumi, Putu
Mejuajua: Jurnal Pengabdian pada Masyarakat Vol. 4 No. 2 (2024): Desember 2024
Publisher : Yayasan Penelitian dan Inovasi Sumatera (YPIS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52622/mejuajuajabdimas.v4i2.173

Abstract

Permasalahan dari guru saat ini yang lebih sering menggunakan media manual daripada teknologi informasi geografis (TIG) saat mengajar geografi. Tujuan penelitian ini untuk membantu guru meningkatkan kemampuan dalam menggunakan alat TIG untuk membuat peta dan deliniasi wilayah, sehingga dapat membantu mengajar geografi lebih efektif dan menarik. Melalui pelatihan guru akan memahami cara menggunakan citra satelit Google Earth untuk mengetahui luas obyek pengamatan atau luas suatu daerah. Metode penelitian ini menggunakan observasi, diskusi, dan simulasi. Subjek penelitian ini adalah guru-guru MGMP geografi di Kota Madiun sebanyak 20 orang. Kegiatan pelatihan ini disusun dengan tiga tahapan yaitu persiapan, pelaksanaan dan penutup. Hasil dari pelatihan ini menunjukkan terdapat kenaikan 12,5 % guru yang mengetahui tentang google earth dan manfaatnya. Pengetahuan guru tentang penggunaan google earth untuk deliniasi wilayah juga mengalami peningkatan sebanyak 23,5 %. Selain itu, kenaikan guru dapat mengoperasikan google earth untuk deliniasi wilayah pada peta meningkat sebanyak 22,1%. Sebanyak 92,3 % guru peserta pelatihan menyatakan memahami pelatihan deliniasi wilayah dengan google earth dan seluruhnya tertarik dengan penggunaan google earth untuk deliniasi wilayah dalam pembelajaran di sekolah.
Optimization of used engine oil Furnace Design with Initial Heater Muhammad Sahbudin; Wawan Hermawan; Agus Sutejo
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1237-1248

Abstract

Used engine oil is a waste from various types of machinery that has potential as an alternative fuel. The viscous characteristics of used engine oil require viscosity adjustment to be utilized as fuel. Nowadays used engine oil burners are generally using an external heater as an initial preheater, which causes the thermal efficiency decreased. The aims of this study are optimizing the design of the used engine oil burner by adding an initial heater and to find the optimum operating conditions of the burner to improve thermal. The initial heater is a spiral-shaped heat exchanger around the flame inside the burner, using its heat to decrease the viscous of used engine oil, so the used engine oil can be used as burner fuel. This study is varying the combustion air flowrate at 3.2×10-3 kg/s, 4.6×10-3 kg/s, and 6.4×10-3 kg/s and fuel rates of 2.1×10-4 kg/s, 3.1×10-4 kg/s, and 4.3×10-4 kg/s so the best performance of the burner will be observed. The results were obtained the best burner performance air flowrate of 4.6×10-3 kg/s and fuel flow rate of 4.3×10-4 kg/s, producing flue gas heat of 544°C, useful energy of 2.69 kW, and a resulting thermal efficiency of 59.54%. Keywords: Burner, Design optimization, Initial heater, Used engine oil, Viscosity.
Performance Evaluation of Ball Mill Type Grinding Machine for Particle Size Reduction of Porang Glucomannan Crystals Agus Sutejo; Dionisius Dwi Wicaksono; Gatot Pramuhadi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.165-177

Abstract

A wide gap in the price of glucomannan flour and porang tubers leads to develop a machine to process tubers into fine flour with good performance. The purpose of this research was to analyze and determine the performance of a ball mill machine on the flour yield as well as its quality. Research was conducted at PT Daud Teknik Maju Pratama from January – May 2023. Testings were carried out under two treatment factors, namely rotational speed (21.2 and 41.6 rpm) and processing time (0.5 h, 1.0 h, 1.5 h, 2 h). The test was carried out using 150 g sample for each treatment with three replications. The response variables included capacity, percentage of size reduction, material losses, engine power, and flour quality. The results showed that the optimum capacity of the ball mill machine was 12.5 kg/batch. The highest percentage of size reduction was 96.27% and the lowest material loss (3.73%) were obtained at 21.2 rpm for 0.5 h of miling process. Treatment with 41.6 rpm for 2 h produced the best flour quality with moisture content of 11.87% and fine flower yield of 63.97% passing through 100-mesh sieve. The power requirements of electric motors at 21.2 rpm and 41.6 rpm were 0.8063 kW and 0.9101 kW, respectively. The best milling capacity (1.560 g/min) was resulted at rotational speed of 62.27% CS. The ball mill machine showed superior results as compared to a disk mill which was not able to grind the glucomannan crystals up to 100-mesh size.Keywords: Ball mill, Glucomannan flour, Performance test, Porang, Refining.
Uji Performansi Mesin Penggiling Tipe Disc Mill untuk Penepungan Porang Sutejo, Agus; Putra, Rafa Andika; Ramdani, Gilang; Putri, Annastasha Diandra
Jurnal Agricultural Biosystem Engineering Vol. 4 No. 2 (2025): June 2025
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jabe.v4i2.10905

Abstract

The porang plant is an abundant commodity that has a high chance of becoming an export commodity in the form of fresh tubers, dried chips, and flour. This creates an impetus for processing businesses so a porang tuber flouring machine with good flouring performance is needed. The disc mill type pressing machine is one of the pressing machines that can process porang up to 60- 80 mesh size. This study aimed to analyze and test the performance of the disc mill machine on the results of milling porang. This research was conducted at PT. Daud Teknik Maju Pratama from January to May 2024 using 1 kilogram of porang measuring 1 cm for each treatment. Tests were carried out using three rotational speeds on the disc mill machine (2160 rpm, 2750 rpm, and 3340 rpm). Each treatment was repeated three times. Tests were conducted to obtain data on milling capacity, yield, shrinkage loss, engine power, and milling quality. The performance results showed that the milling capacity of the disc mill machine ranged from 5.96- 9.89 kg/hour. The milling yield value in the 3340 rpm rotational speed treatment was obtained the highest result (91.37%) and the lowest shrinkage (8.63%). The best milling quality results were also obtained in the 3340 rpm rotary speed treatment with the highest value of fine particles 28.54% passing the 80 mesh sieve and the highest percentage reduction in water content of 4.17%. The electric motor power required for disc mill machines with rotating speeds of 2160 rpm, 2750 rpm, and 3340 rpm were 1.0961 kW, 1.3486 kW, and 1.5456 kW, respectively. Keywords:  Disc Mill, Flouring, Performance Test, Porang, Porang Flour. 
Co-Authors Abdillah, Kemas Asror Abdul Khair Achmad Zurhafidz Ramadhan Adithya Rakhmat Prayoga Agustami Sitorus, Agustami Ahmad Thoriq Ahmad Thoriq Ajat Zatmika Al Khalidhi, M. Alvhandi Astu Unadi Ayuningtyas, Fara Bambang Hariyanto Desrial Diang Sagita Dionisius Dwi Wicaksono Fahrudin Fadirubun, Fahmi Fajri, Rahmatul Gatot Pramuhadi Ghiffari, Miftah Hari K. Lasmono I Dewa Made Subrata Ide Bagus Siaputra Jayawarsa, A.A. Ketut Kurniasari, Rahma Sholihah Makhmudiyah, Nurul Muhammad Sahbudin Nurmayni, Ratna Nuryanti, Linda Putra, Rafa Andika Putri, Annastasha Diandra Ramdani, Gilang Rokhani Hasbullah Ruswendi, Wenwen Sahbudin, Muhammad Sam Herodian sri murtini . Srimoeljanto, Agoeng Sucahyo, Lilis Susanto, Triyono Sutrisno Mardjan Tineke Mandang W. Sumunaringrum, Monica D. Wawan Hermawan Wawan Hermawan Wawan Hermawan Wicaksono, Dionisius Dwi Wirabumi, Putu WIWIK SRI UTAMI