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Rancang Bangun dan Uji Kinerja Mesin Sortasi Duku dengan Kerucut Berputar Irfan, Akhmad; Tajalli, Muqorob
Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Vol 7 No 1 (2020): Januari
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian Masyarakat (LP3M) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/ppkm.v7i1.1060

Untuk menghasilkan produk yang lebih seragam diperlukan strategi sortasi. Mesin sortasi duku dengan sistem rak getar menghasilkan tingkat keberhasilan 59.5%. Untuk meningkatkan tingkat keberhasilan sortasi dilakukan perancangan mesin sortasi dengan kerucut berputar. Metode penelitian ini meliputi perancangan dan pengujian. Dari penelitian ini dihasilkan rancangan mesin sortasi yang mampu mensortasi sampel dengan baik berdasarkan ukurannya. Hasil lainnya adalah keseragaman sortasi paling tinggi terjadi pada grade 1 yaitu mencapai 100% dengan sampel tomat. Pada sampel kokosan hasil sortasi pada grade 3 sebesar 88.4% dan grade 2 sebesar 8% dengan tingkat ketercampuran 9.9%. Keberhasilan proses sortasi mesin sortasi buah duku 100% dengan semua buah mampu tersortasi. Dengan sampel kokosan mesin sortasi mampu beroprasi dengan kapasitas 111.81 kg/jam.

Analisis Dimensional Reaktor Berpengaduk Statis untuk Produksi Biodiesel Akhmad Irfan; Armansyah Halomoan Tambunan; Desrial -
Jurnal Keteknikan Pertanian Vol. 4 No. 2 (2016): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

AbstractBiodiesel production can be done using static mixing reactor (SMR). The production by this method requires less energy than blade agitator. However, the use of elements in the helix-shaped stirrer reactors causing large pressure drop. The other factors that affect the flow in the SMR can be determined using dimensional analysis. Dimensional analysis can be used to eliminate the variables that are not required so that can be done to optimize the energy used in the SMR design. The variables that influence the pressure drop (ΔP) in the SMR can be formulated into mathematical equation as:Total irreversibility due to the use of a static mixer in the SMR tested is 0.237 W.AbstrakProduksi biodiesel dapat dilakukan dengan menggunakan reaktor berpengaduk statis atau SMR (Static Mixing Reactor). Pembuatan biodiesel dengan metode ini membutuhkan energi yang lebih kecil dibandingkan dengan menggunakan blade agitator. Namun demikian penggunaan elemen pengaduk yang berbentuk helix dalam reaktor menimbulkan pressure drop yang besar. Faktor-faktor lain yang berpengaruh terhadap aliran di dalam SMR dapat ditentukan dengan menggunakan analisis dimensional. Analisis dimensional mampu menghilangkan variabel-variabel yang tidak diperlukan sehingga dapat dilakukan untuk mengoptimalkan energi yang digunakan dalam perancangan SMR. Variabel-variabel yang berpengaruh terhadap pressure drop (ΔP) di dalam SMR yang dapat diformulasikan ke dalam bentuk persamaan matematis sebagai:Ketakmampubalikan total akibat penggunaan elemen berpengaduk statis yang diuji adalah 0,237 W.

ANALISIS COMPUTATIONAL FLUID DYNAMIC (CFD) PENYEBARAN PANAS PADA DAPUR PELEBURAN ALUMUNIUM Iful Rumanto; Sunaryo Sunaryo; Akhmad Irfan
Device Vol 11 No 1 (2021): Bulan Mei
Publisher : Fakultas Teknik dan Ilmu Komputer (FASTIKOM) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/device.v11i1.1785

Penelitian pengaruh bentuk tungku terhadap sebaran panas pada dapur peleburan aluminium bertujuan untuk mengetahui bentuk tungku dengan sebaran panas paling baik. Penelitian ini menggunakan temperature awal 3000C, heat flux 300 W/m2 dan 3 variasi bentuk tungku. yaitu bentuk tungku hexagon, bentuk tungku segi empat, dan bentuk tungku segi 12. Hasil simulasi dari variasi pertama menghasilkan temperature tertingi 706.15 0C dan temperature terendah 604.65 0C, variasi kedua menghasilkan temperature tertinggi 688 0C dan temperature terendah 526.65 0C, dan variasi ketiga menghasilkan temperature tertinggi 704.30 0C dan temperature terendah 535.75 0C. Dari hasil simulasi menunjukan bahwa variasi pertama dengan bentuk tungku hexagon memiliki sebaran panas paling baik.

PENINGKATAN PRODUKSI INDUSTRI RUMAHAN FURNITURE DAN ALAT PERAGA EDUKASI DI KALIBEBER WONOSOBO Faqih, Nasyiin; Irfan, Akhmad; Guspul, Ahmad
Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Vol 11 No 01 (2024): Januari
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian Masyarakat (LP3M) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/ppkm.v11i01.5791

Ekonomi kreatif yang menjadi salah satu target program pengembangan dari pemerintah, termasuk di kota Wonosobo Jawa Tengah, sangat membutuhkan pengembangan usaha yang dapat menyerap banyak pelaku usaha baru. Di Wonosobo perkembangan pariwisata sangat cepat dengan adanya wisata Dataran Tinggi Dieng dan Panorama Sikunir. Salah peluang usaha yang bisa dilakukan adalah di bidang kerajinan souvenir, furniture dan Alat Peraga Edukasi (APE) yang mensupplay ke seluruh TK dan PAUD di Kabupaten Wonosobo. Saat ini banyak pesanan Furniture modern seperti almari, buffet, wardrobe, dinding dan sebagainya dengan nuansa desain modern minimalis. Industri Rumah Tangga “Dieng Keren (DEKE)” yang beralamat di kelurahan Kalibeber Kecamatan Mojotengah Kabupaten Wonosobo merupakan salah satu Industri yang bergerak di bidang Souvenir, Furniture dan Alat Peraga Edukasi (APE). Berdasarkan hasil diskusi dengan ketua pengrajin, tim Pengabdian Masyarakat dari UNSIQ Wonosobo merasa perlu untuk memberikan pendampingan teknis dan stimulan peralatan yang diperlukan untuk peningkatan kualitas dan kuantitas produksi. antara lain dengan merencanakan desain seperangkat alat CNC ROUTER.

PENINGKATAN PRODUKSI INDUSTRI RUMAHAN FURNITURE DAN ALAT PERAGA EDUKASI DI KALIBEBER WONOSOBO Faqih, Nasyiin; Irfan, Akhmad; Guspul, Ahmad
Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Vol 11 No 01 (2024): Januari
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian Masyarakat (LP3M) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/ppkm.v11i01.5791

Ekonomi kreatif yang menjadi salah satu target program pengembangan dari pemerintah, termasuk di kota Wonosobo Jawa Tengah, sangat membutuhkan pengembangan usaha yang dapat menyerap banyak pelaku usaha baru. Di Wonosobo perkembangan pariwisata sangat cepat dengan adanya wisata Dataran Tinggi Dieng dan Panorama Sikunir. Salah peluang usaha yang bisa dilakukan adalah di bidang kerajinan souvenir, furniture dan Alat Peraga Edukasi (APE) yang mensupplay ke seluruh TK dan PAUD di Kabupaten Wonosobo. Saat ini banyak pesanan Furniture modern seperti almari, buffet, wardrobe, dinding dan sebagainya dengan nuansa desain modern minimalis. Industri Rumah Tangga “Dieng Keren (DEKE)” yang beralamat di kelurahan Kalibeber Kecamatan Mojotengah Kabupaten Wonosobo merupakan salah satu Industri yang bergerak di bidang Souvenir, Furniture dan Alat Peraga Edukasi (APE). Berdasarkan hasil diskusi dengan ketua pengrajin, tim Pengabdian Masyarakat dari UNSIQ Wonosobo merasa perlu untuk memberikan pendampingan teknis dan stimulan peralatan yang diperlukan untuk peningkatan kualitas dan kuantitas produksi. antara lain dengan merencanakan desain seperangkat alat CNC ROUTER.

Sustainable Bioethanol Production from Carica (Carica pubescens) Peel Waste: Optimization of Acid Hydrolysis and Fermentation Time Sofana Ubaidilah; Akhmad Irfan; Sunaryo Sunaryo; Keodouangdy Yongthong; Rizky Mulya Sampurno; Berwyn Dzaky Radhitya
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 2 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i2.771

The global energy crisis and continued reliance on fossil fuels have intensified the search for sustainable alternative energy sources, particularly biomass-derived biofuels. One promising yet underutilized resource is the peel waste of Carica pubescens, a papaya variety indigenous to the Dieng Plateau. This study investigates the potential of Carica peel waste as a bioethanol feedstock through sulfuric acid (H₂SO₄) hydrolysis and fermentation using Saccharomyces cerevisiae. To optimize sugar yield, the concentration of H₂SO₄ was varied between 0.1 M and 0.8 M, while fermentation durations were set at 96, 120, 144, and 168 hours. Results indicated that hydrolysis with 0.8 M H₂SO₄ produced the highest sugar concentration (6.8%). The most effective fermentation period was 120 hours, yielding 64% bioethanol with a density of 0.8679 g/mL, a calorific value of 4,831 kcal/kg, a flame height of 14.6 cm, and a combustion temperature of 438°C. These findings demonstrate the viability of Carica peel waste as a valuable raw material for bioethanol production. Its high efficiency and favorable fuel properties highlight its potential for integration into local renewable energy initiatives, contributing to sustainable energy development. Further studies on large-scale implementation and process optimization are recommended to maximize its industrial application.

Fabrication and Characterization of Environmentally Friendly Bioplastic Film Based on Chitosan from Cassava Peel Starch Muhammad Fahmi Reza; Akhmad Irfan; M Furqon Hakim; Kristya Hadi Wicaksono; Vishal R. Panse; Alok Shukla
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 3 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i3.791

Bioplastics are renewable materials capable of natural degradation and can be synthesized using bio-organic compounds such as cellulose, chitosan, carboxymethyl cellulose (CMC), and glycerol. Cassava peels, an agricultural byproduct, are a rich source of starch and cellulose, making them a promising raw material for bioplastic production. This study aims to fabricate and characterize chitosan-based bioplastic films using cassava peel starch, with a focus on optimizing their mechanical and biodegradation properties. Bioplastic films were prepared by combining cassava peel starch, chitosan, CMC, and glycerol, with chitosan concentrations varied at 45% and 75%. The films were evaluated for surface morphology using Scanning Electron Microscopy (SEM), tensile strength, elongation at break, water absorption capacity, and biodegradability. SEM analysis revealed that chitosan concentration significantly influenced the film morphology, which in turn affected mechanical and swelling properties. The highest tensile strength (0.07 MPa) and elongation (22.5%) were observed in films with 75% chitosan. Water absorption peaked at 93.32% for the same formulation. Biodegradability tests showed complete degradation (100%) within 12 days for films with 45% chitosan. These findings demonstrate that cassava peel starch combined with chitosan can produce biodegradable films with tunable properties, offering a sustainable alternative for packaging and other applications.

Production and Characterization of Bioethanol from Tobacco Stalks via Acid Hydrolysis and Fermentation Akhmad Irfan; Adi Muslihat; Sunaryo; Sri Jumini; Ikrom Mustofa; Dhandhun Wacano; Raju; Amir Machmud; Endah Kinarya Palupi
International Journal of Hydrological and Environmental for Sustainability Vol. 5 No. 1 (2026): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v5i1.1030

The increasing demand for energy and the environmental impacts of fossil fuel consumption have encouraged the development of renewable and sustainable energy sources. Bioethanol derived from lignocellulosic biomass represents a promising alternative fuel due to its renewability and reduced competition with food resources. This study investigates the potential of tobacco stalks, an underutilized agricultural residue, as a feedstock for bioethanol production through acid hydrolysis and fermentation processes. Dried tobacco stalks were hydrolyzed using 1 M sulfuric acid at 110 °C for 3 h to produce fermentable sugars, followed by batch fermentation using Saccharomyces cerevisiae with variations in yeast concentration and fermentation time. The fermentation products were purified by simple distillation and characterized using refractometry, density measurement, GC–MS, and bomb calorimetry. The hydrolysis process yielded a sugar concentration of 7.6%. Refractometric analysis indicated ethanol concentrations in the range of 64–68% (v/v), while density measurements suggested lower effective ethanol purity due to residual water and non-ethanol components. GC–MS analysis confirmed ethanol as the dominant compound, with relative contents ranging from approximately 52% to 73%, accompanied by acetic acid and minor volatile by-products. The calorific value of the produced bioethanol ranged from 4,825 to 4,983 kcal/kg and increased with fermentation time. The results demonstrate that tobacco stalks have considerable potential as a lignocellulosic feedstock for bioethanol production, although further process optimization is required to enhance ethanol purity and overall conversion efficiency.

Numerical Study of the Effect of Grid Number and Viscous Model on Fin and Tube Heat Exchanger Performance MUHAMAD SAFI'I; NAZARUDDIN SINAGA; EFLITA YOHANA; YAFID EFFENDI; AKHMAD IRFAN; SUHERI SUHERI; ROUF MUHAMMAD; AGUNG NUGROHO; CANDRA WAHYU SPORTYAWAN
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol 12 No 1 (2026): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v12i1.6917

The fin and tube heat exchanger (FTHE) has attracted attention among technicians and researchers because of its performance. This research was conducted to determine the effect of variations in the number of grids and viscous models on FTHE on its thermal performance using the Fluent application in the Computational Fluid Dynamics computer program, which was varied against the number of grids and viscous models in various variations of fluid flow speed with a constant heat flux of 100 W. The best results of this research were obtained with the variation of the longitudinal pitch ratio of 14.5 mm with a heat transfer coefficient value of 97.24 W/m2K, while the ratio of the transverse pitch direction of 11.7 mm with a heat transfer coefficient value of 107.82 W/m2K. The best results of this research were obtained at variations in the number of grids of 358456 in variations of the viscous k-w Standard model with an average FTHE temperature value of 21.35 oC and a maximum heat transfer coefficient value of 101.74 W/m2K. These results confirm that the variation of the number of grids of 358456 in the variation of the viscous k-w Standard model allows the numerical study model to be recommended and used for practical applications on machine devices, and can be applied directly in the field. Keywords: Fin and Tube Heat Exchanger (FTHE), Longitudinal Pitch, Transversal Pitch, Performa.

Bahasa Inggris: Bahasa Inggris Muhamad Safi'i; Akhmad Irfan; Rouf Muhammad; Suheri Suheri; Yafid Effendi
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.15451

Cavitation is a major issue in centrifugal pumps because it impacts their performance and efficiency. Experimental research was conducted to investigate the effect of the number of impeller blades and mass flow rate on the cavitation phenomenon in centrifugal pumps, as well as to characterize them. The Ebara brand centrifugal pump type 65x50 FSS4JA used in the TCU installation of the Casting Machine has a number of blades of 4 and 6 with a fixed inclination angle of 60° as the object of research. The fluid mass flow rate varies with values of 1.67 kg/s, 3.33 kg/s, 5.67 kg/s, and 7.33 kg/s. The research findings show that the highest cavitation occurs in the centrifugal pump with 4 blades, with an NPSH value reaching 2.02 at a mass flow rate of 5.67 kg/s, while the lowest value is found in the pump with 6 blades with an NPSH of 1.88 at a mass flow rate of 7.33 kg/s. A 6-blade centrifugal pump operating at a mass flow rate of 7.33 kg/s demonstrated the best results in this study and is feasible for field application. Keywords: Impeller, Cavitation, Pump, Centrifugal.

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