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Wawan Hermawan
Departemen Teknik Mesin Dan Biosistem, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Kampus IPB Darmaga, PO Box 220, Bogor, Jawa Barat
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Physics

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Evaluasi Kinerja Pemisahan Tangkai dan Daun Teh Layu Berdasarkan Prinsip Perontokan dan Penghisapan Agus Sutejo; Sutrisno Suro Mardjan; Wawan Hermawan; Desrial Desrial; Diang Sagita
Jurnal Riset Teknologi Industri Vol.14 No.2 Desember 2020
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26578/jrti.v14i2.6431

Abstract

Salah satu kelemahan pada proses pengolahan teh adalah tercampurnya tangkai dan daun teh sehingga proses grading dan sorting dilakukan pada produk akhir teh. Pada penelitian ini, dikembangkan suatu pendekatan baru pemisahan tangkai dan daun teh yaitu pada awal proses. Prinsip yang digunakan adalah dengan merontokan daun dari tangkai teh dan memisahkannya dengan berdasarkan perbedaan kecepatan terminal. Sebuah paket teknologi diperlukan untuk memisahkan tangkai dan daun teh sehingga keduanya dapat diproses secara terpisah untuk menghasilkan teh dengan kualitas terbaik (kelas satu) dalam pengolahan sistem teh ortodoks. Tujuan dari penelitian ini adalah untuk mengembangkan dan mengevaluasi paket teknologi pemisah daun dan tangkai teh yang telah dilayukan. Metode penelitian terdiri dari pembuatan desain mesin, pembuatan prototipe, uji fungsional mesin dan uji kinerja mesin. Paket teknologi yang telah dibangun terdiri dari tiga unit mesin yaitu mesin perontok, mesin pengayak getar dan mesin penghisap daun teh. Hasil pengujian kinerja terbaik diperoleh pada kecepatan putar silinder perontok 480 rpm yang menghasilkan persentase daun terhisap tertinggi (91,43%) dan persentase tangkai tidak terhisap paling tinggi (86,05%). Rata-rata kecepatan udara hisap pada permukaan tray saat pengujian berada pada kecepatan terminal daun teh, yaitu 1,78-2,98 m s-1 dan kapasitas rata-rata perontokan adalah 156,71 kg jam-1. Berdasarkan hasil penelitian, dapat dilihat bahwa pemisahan dengan metode perontok sangat cocok untuk proses pembuatan teh hijau karena dengan prinsip ini dapat meminimalisir kerusakan pada daun teh.
Uji Coba Peti Ikan Segar Berpendingin untuk Pedagang Ikan Keliling Tri Nugroho Widianto; Wawan Hermawan; Bagus Sediadi Bandol Utomo
Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 9, No 2 (2014): Desember 2014
Publisher : Balai Besar Riset Pengolahan Produk dan Bioteknologi Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jpbkp.v9i2.111

Abstract

Uji coba peti ikan segar berpendingin untuk pedagang ikan keliling telah dilakukan. Percobaan diawali dengan pengamatan suhu ruang peti ikan dalam kondisi kosong (tanpa ikan) yang dilakukan tiap 10 menit selama 2 jam. Percobaan berikutnya dilakukan dengan cara pengamatan terhadap proses penjualan ikan menggunakan peti berpendingin oleh pedagang keliling selama 3 hingga 4 jam. Suhu ikan diukur tiap 10 menit, sedangkan mutu kesegaran ikan diamati pada awal dan akhir percobaan. Hasil uji coba peti dalam kondisi kosong menunjukkan bahwa suhu dapat mencapai 11,1–15,5 °C. Setelah diisi 30 kg ikan yang telah didinginkan hingga 0–1 °C dan dilakukan praktek penjualan ikan eceran selama 3–3,8 jam, suhu ikan mencapai sekitar 3 °C dengan nilai mutu organoleptik dan jumlah bakteri yang hampir tidak berubah. Dapat dikatakan bahwa peti ikan berpendingin mampu mempertahankan suhu dan mutu kesegaran ikan selama proses penjualan ikan eceran oleh pedagang ikan keliling.
Traction Performance Analysis of Track Wheels Type on Wet and Deep Muddy of Soil in Soil Bin Muhammad Taufiq; Tineke Mandang; Wawan Hermawan; Desrial
Jurnal Keteknikan Pertanian Vol. 10 No. 3 (2022): Desember 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.3.226-239

Abstract

Hand tractors with lugged wheels have difficulty when operating in wet and deep mud of paddy fields. To solve this problem, the wheels need to be replaced with tracks wheel type that have a much larger contact area. Data on traction performance characteristics of the track wheel type on muddy soil are required for design purposes, which can be obtained by testing the prototype of track wheel type on a soil bin. The objective of this research is to analyze the traction performance of the lugged track of wheel type on wet soil. The track wheel type with a length of 60 cm and a width of 20 cm will be tested in a soil bin filled with wet and muddy soil with a depth of 30 cm. The test will be carried out on variations in vertical loads of 9.5, 12.5, 15.5, 18.5, and 22.7 kg; horizontal loads of 1, 2, 3, and 4 kg; distance between of lugs of 12.70, 19.05, and 25.40 cm; and height of lugs of 5, 10, and 15 cm. Parameters observed in the test are sinkage, slip and traction efficiency. The test results show that the pull force and vertical force have a dominant effect on track sinkage, track slip, and tractive efficiency. The optimum track wheel type design has size a lug height of 10 cm and a distance between lugs of 19.05 cm result in a sinkage of 7.32 cm, slip of 14%, and tractive efficiency of 68.46%.
Near Real Time Spasial Distribution of Tillage Specific Draft Over Uncultivated Sugar Cane Plantation Based on SENTINEL-1A Imagery Harry Imantho; Kudang Boro Seminar; Wawan Hermawan; Satyanto Krido Saptomo
Jurnal Keteknikan Pertanian Vol. 10 No. 2 (2022): Agustus 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.2.172-185

Abstract

Variabilitas spasial sangat penting dalam pengelolaan pertanian skala besar seperti perkebunan. Informasi tentang variabilitas spasial lahan pertanian diperlukan untuk memastikan efektivitas dan efisiensi pengoperasian mesin pengolahan tanah. Studi ini mengusulkan sebuah model untuk menentukan distribusi spasial mendekati waktu nyata dan resolusi tinggi dari draft spesifik pengolahan tanah berdasarkan citra radar Sentinel-1A. Hasil penelitian menunjukkan bahwa dinamika spasial kadar air tanah dekat waktu nyata dengan fraksi debu dan liat pada lapisan olah tanah mempengaruhi sifat mekanik tahanan penetrasi tanah. Model Dubois telah diterapkan untuk menghitung kadar air tanah spasial berdasarkan Sentinel-1A. Model matematika untuk menghitung tahanan penetrasi tanah dikembangkan dari metode yang diusulkan menggunakan pendekatan regresi berganda berdasarkan data sampel yang dikumpulkan dari perkebunan tebu di kabupaten Kediri dan Sidoarjo, Jawa Timur, Indonesia. Kinerja model telah dihitung dan menunjukkan kinerja yang baik dengan nilai RMSE, MAPE dan akurasi masing-masing sebesar 0,235, 18,32% dan 81,68%. Distribusi spasial tahanan penetrasi tanah yang dihasilkan oleh model menjadi masukan penting dalam perhitungan draft spesifik pengolahan tanah berdasarkan pendekatan Kisu. Distribusi tahanan penetrasi dan draft spesifik pengolahan tanah dapat dihitung dan divisualisasikan menggunakan peta spasial. Peta sebaran draft spesifik pengolahan tanah membuktikan bahwa gaya yang bekerja per luas penampang tanah yang akan diolah bervariasi di seluruh area perkebunan tebu. Kontribusi masa depan dari penelitian ini adalah untuk mengembangkan sistem pendukung keputusan dalam pemilihan mesin pertanian yang tepat untuk operasi pengolahan tanah di perkebunan tebu berdasarkan prinsip-prinsip pertanian presisi.
Pengaruh Laju Umpan Bahan Bakar dan Laju Aliran Udara terhadap Kinerja Pembakaran Tungku Fixed Bed Tamaria Panggabean; Tineke Mandang; Leopold Oscar Nelwan; Wawan Hermawan
agriTECH Vol 43, No 1 (2023)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.70508

Abstract

Penelitian ini dilatarbelakangi kelemahan pembakaran tungku yang menghasilkan pembakaran yang tidak sempurna dikarenakan kurang optimalnya rasio bahan bakar dan udara serta waktu tinggal pembakaran yang singkat. Penelitian ini bertujuan untuk memperoleh laju umpan bahan bakar dan laju aliran udara yang menghasilkan pembakaran sempurna. Makalah ini menjelaskan pengaruh laju umpan bahan bakar dan laju aliran udara terhadap kinerja pembakaran tungku fixed bed sebagai sumber energi panas pengering. Pengukuran efisiensi tungku dilakukan pada berbagai laju umpan sekam dan laju aliran udara. Penelitian ini dilakukan pada 3 laju umpan sekam yaitu 12, 15, dan 18 kg/jam, dan pada 5 laju aliran udara yaitu 86,4; 120,96; 114,84; 108 dan 154,8 kg/jam. Perlakuan optimum diperoleh pada laju umpan sekam 15 kg/jam dan laju aliran udara 114,84 kg/jam dengan efisiensi tungku sebesar 73,99%, panas yang dihasilkan 41,55 kW dan dan % abu/arang yang diproduksi 17,89%. Suhu gas buang bervariasi dari 99,78-474,23°C pada berbagai laju umpan sekam dan laju aliran udara. Analisis gas buang menunjukkan pelepasan panas maksimum terjadi ketika tungku diberi kelebihan udara berlebih 100% yang dibutuhkan untuk pembakaran sempurna.
A Penentuan Parameter Desain Mesin Perontok Sorgum Berdasarkan Karakteristik Fisik dan Mekanik Tanaman Sorgum: Identification of the Physical Characteristics of Sorghum Bioguma for the Design of a Sorghum Thresher Machine Ana Nurhasanah; Wawan Hermawan; Tineke Mandang; Astu Unadi; Maria TJB; Herry Susanto; Arif S; M Hidayat; Suparlan Suparlan; Anugerah Fitri Amalia; Teguh WW; Uning B; Ni Putu Dian Nitamiwati; Adji P
Jurnal Keteknikan Pertanian Vol. 11 No. 1 (2023): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.011.1.76-87

Abstract

An effective and efficient threshing mechanism for sorghum plants requires information about technical properties, including the physical and mechanical properties of this sorghum plant. This study aims to determine some of the physical properties of the sorghum variety Bioguma in the seeds, stems, and leaves for the threshing mechanism of the sorghum seeds and stems. This study used a descriptive method with several repetitions from 3 to 30, depending on the measured parameters. All sampling was done randomly. The sorghum plants tested were from several fields in Majalengka and Bogor. The dimensions of the Bioguma variety of sorghum seeds, which have values ranging from 4.23 mm to 5.88 mm in width, 2.49 mm to 2.85 mm in thickness, and 3.95 mm to 4.98 mm in height, are considered in the design of threshing cylinder sieve sizes, namely using a perforated plate with a diameter of 6 mm; threshing power requirements with threshing cylinder speed on the designed threshing machine, assuming a threshing cylinder diameter of 51 cm and a rate of 700 rpm requires a power of 9.17 kW.
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.
Pemanfaatan Limbah Daun Kelapa Sawit sebagai Bahan Baku Pupuk Kompos Ramayanty Bulan; Tineke Mandang; Wawan Hermawan; Desrial Desrial
Rona Teknik Pertanian Vol 9, No 2 (2016): Volume 9, No. 2, Oktober 2016
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v9i2.5650

Abstract

Abstrak. Limbah padat pada perkebunan kelapa sawit telah diketahui potensial sebagai bahan baku pupuk organik padat melalui proses pengomposan. Penelitian ini bertujuan mengembangkan teknik dan mengkarakterisasi proses pengomposan limbah daun kelapa sawit sebagai bahan dasar pupuk organik potensial. Proses pengomposan dilakukan dengan dua faktor perlakuan, meliputi komposisi bahan katalisator kompos (Bokashi, Vermikompos dan Natural) dan ukuran cacahan daun sawit (2 cm, 4 cm 6 cm). Parameter yang diamati meliputi persentase penyusutan massa dan fluktuasi perubahan suhu selama proses pengomposan, serta pengukuran zat hara Nitrogen, Phospor, Kalium (NPK) dan rasio C/N yang terkandung pada hasil pengomposan yang diukur setelah 10 dan 14 minggu proses pengomposan. Hasil penelitian menunjukkan bahwa metode pengomposan dengan bokashi memberikan penyusutan massa terbesar jika dibandingkan dua metode lainnya pada semua ukuran cacahan yaitu sebesar 32%. Cacahan daun sawit yang berukuran kecil cenderung memberikan proses pengomposan yang lebih cepat dan memberikan produk kompos yang lebih baik. Hasil pengukuran setelah proses pengomposan menunjukkan bahwa interaksi dua faktor perlakuan yang diberikan hanya berpengaruh signifikan pada rasio C/N dan tidak signifikan pada zat hara NPK. Utilization of Waste Palm Leaves as Raw Material Palm CompostAbstract. The use of oil palm plantation solid waste, particularly oil palm leaf as organic compost raw material are now receiving greater attention by researchers, but have not been fully utilized on large scale, either agriculturally or industrially. The aim of present study was to characterize composting process with oil palm leaf as raw material. The research of composting conducted with two combination of composting factor, namely: composting starter composition (i.e. Bokashi, vermi-compost and natural composting) and piece of frond dimension (2 cm, 4 cm, 6 cm). The percentage of mass reduction and temperature fluctuation during composting process were measured. The NPK compound and C/N ratio measurement were conducted after composting process which are 10 and 14 weeks. The result indicates that Bokashi starter composition gives higher percentage of mass reduction on all variant of piece of frond dimension. Results also showed that smaller piece of frond enable the composting process quicker and had better result. Statistical analysis reveals that combination of composting factors have significant effect on C/N ratio but insignificant on NPK.
Engineering of Information Monitoring System Sensor Reading Data Based on Smart Wireless using NVDIA Jetson Nano and Arduino Mega on Agricultural Spraying Machines Ridwan Siskandar; Tineke Mandang; Wawan Hermawan; Irzaman Irzaman
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 12, No 4 (2023): December 2023
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v12i4.921-936

Abstract

The focus of the research is monitoring data from sensors on the agricultural sprayer. The monitoring system support by some sensors in camera, tank capacity, boom sprayer balance and battery capacity. The research method was carried out using the waterfall model, because according to the needs that require a sequential flow in the process. This model is divided into four parts, namely analysis (to identify problems and needs), design (plans to solve problems to be solved), implementation (implementation of plans that have been made), and testing. Engineering of Information Monitoring System Sensor Reading Data Based on Smart Wireless using NVDIA Jetson Nano and Arduino Uno on Agricultural Spraying Machines. The test results for the CNN model for the detection of the “Jajar Legowo” object were carried out to obtain 90% accuracy, 82.35% precision and 100% recall. Tests an accuracy value cappacity tank of 100%. Testing the balance sensor, if rotates clockwise on the Y axis the output voltage decreases, and vice versa. However, if the sensor at rest, the output voltage will same as the offset value. Besides that, testing the optimum PWM value fuzzy approach is carried out with aim that the droplets hit the target zone when sprayer is working. The result are Arduino IDE and Matlab produce same value, which is 42 for the optimum PWM value. Testing the battery capacity sensor get accuracy value of 100% by difference in the voltage increase of 0.5 volts is equivalent to increase of 10%. All information read by the sensors is displayed on the LCD using WMS-2000 (smart wireless). Keyword: Fuzzy, Microcontroller, Monitoring, Sensor data, Smart wireless
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.
Co-Authors Abdul Azis Abdul Aziz Abdullah Adhiasta Faris Setiabudi Adji P Agus Sutejo Agussabti Agussabti Agustami Sitorus Ajat Zatmika Ana Nurhasanah Anak Agung Keswari Krisnandika Andriani Lubis Annisa Nur Ichniarsyah Anugerah Fitri Amalia Arif S Aris Purwanto Armansyah Halomoan Tambunan Astu Unadi Azmi Asyidda Mushoffa Bagus Sediadi Bandol Utomo Desrial Diang Sagita Diang Sagita Endah Prahmawati Eny Widajati Erizal Hambali Farkhan . Feby Nopriandi Gatot Pramuhadi Giyanto Giyanto Harry Imantho Herry Susanto Hideo Hasegawa I Dewa Made Subrata Irwin Syahri Cebro Irzaman, Irzaman Kudang Boro Seminar M Hidayat M. Faiz Syuaib Maria TJB Masayuki Koike Midian Shite Muhammad Dhafir Muhammad Idkham Muhammad Sahbudin Muhammad Taufiq Muqroob Tajalli Nelwan, Leopold Oscar Ni Putu Dian Nitamiwati Radite Praeko Agus Setiawan Ramayanty Bulan Ramayanty Bulan Ramayanty Bulan Ridwan Siskandar Rosyid Ridho Satyanto Krido Saptomo Setyo Pertiwi Suparlan Suparlan Sutrisno Mardjan Tamaria Panggabean Tatun Hayatun Nufus Taufik Rizaldi Teguh WW Tineke Mandang Tomohiro Takigawa Tri Nugroho Widianto Ubaidillah . Uning B Usman Ahmad Yulianto Laksono Putra