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All Journal Teknotan: Jurnal Industri Teknologi Pertanian Mechatronics, Electrical Power, and Vehicular Technology Fibusi (Jurnal Online Fisika) Widyariset Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Teknologi Indonesia Ketenagalistrikan dan Energi Terbarukan Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Widyariset TIN: TERAPAN INFORMATIKA NUSANTARA
Hilman Syaeful Alam
Indonesian Institute of Sciences
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Social Sciences Veterinary Other

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REYNOLDS NUMBER ESTIMATION OF ROTAMETER BASED ON K-EPSILON MODEL Bahrudin Bahrudin; Hilman Syaeful Alam
Widyariset Vol 3, No 1 (2017): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.3.1.2017.9-18

Abstract

Measurement of fluid flow with the aid of a floating element (rotameter) is a simple method used to measure the velocity of the fluid with a better degree of accuracy. However, there is still a tendency for turbulence flow around the floating element (annular area) due to narrowing of the flow area and the geometry shape of the floating element that can reduce the level of the rotameter accuracy. Single phase turbulent flow through rotameter was estimated using k-epsilon turbulence model. Detailed study has been performed to investigate the influence of turbulence characteristics from the Reynolds Number ( ) as a benchmark for predicting the level of turbulence. The results showed that at the velocity of 800 l/h the level  is arounds 450, which show that the fluid flow on the rotameter categorized as turbulence
Uji Kinerja dan Penerapan Nanobubble Generator pada Hidroponik Nutrient Film Technique (NFT) Terhadap Pertumbuhan Selada Oktora, Grace Indah; Yusuf, Asep; Dwiratna, Sophia; Alam, Hilman Syaeful
Teknotan: Jurnal Industri Teknologi Pertanian Vol 18, No 3 (2024): TEKNOTAN, Desember 2024
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol18n3.4

Abstract

Nanobubble generator merupakan salah satu alat untuk menghasilkan gelembung halus dengan diameter < 1 µm. Nanobubble generator terdiri dari pompa dan nozel yang diaplikasikan pada larutan nutrisi sehingga kadar Dissolved Oxygen (DO) dapat meningkat. Hidroponik Nutrient Film Technique (NFT) memiliki kadar DO terkecil pada siang hari yaitu 5,2 mg/L. Kadar DO tersebut masih termasuk dalam kebutuhan tanaman hidroponik namun belum mendekati batas maksimal yaitu 8 mg/L. Penelitian ini bertujuan untuk mengetahui kinerja dan pengaruh nanobubble generator terhadap pertumbuhan selada pada hidroponik NFT. Uji kinerja nanobubble generator dilakukan dengan uji PSA, uji zeta potensial, pengukuran listrik, dan perubahan kadar DO. Pada penanaman selada terdapat 4 perlakuan meliputi; kontrol (P0), generate 3 hari sekali (P1), generate 7 hari sekali (P2), dan generate 10 hari sekali (P3). Penelitian menggunakan Rancangan Acak Kelompok (RAK). Hasil pengukuran tanaman dibandingkan dengan uji ANOVA, dan dilanjut dengan uji Duncan untuk mengetahui perbedaannya. Hasil uji kinerja nanobubble generator diantaranya diameter gelembung nano yaitu 394,6 nm; nilai indeks polidispersi (PDI) yaitu 1,783; zeta potensial sebesar -23,3 mV; daya, tegangan, dan arus listrik sebesar 98,47 Watt; 230,71 Volt; 0,44 Ampere. Hasil tersebut menunjukkan diameter gelembung sesuai standar ISO 20480-1-2017 dengan distribusi ukuran gelembung yang heterogen, serta memiliki stabilitas yang baik di dalam air. Hasil pengukuran biaya listrik sangat kecil yaitu Rp 426,1865 untuk satu masa panen. Hasil pengamatan pertumbuhan selada terdapat perbedaan kadar DO pada setiap perlakuan dengan penerapan nanobubble generator. Hasil panen pertumbuhan selada yang paling baik pada parameter berat segar, tinggi tanaman, dan lebar naungan yaitu dengan perlakuan P1 (generate setiap 3 hari sekali).
Nitrogen Nanobubbles on Viola cornuta growth and its effect on post-harvest quality Rosalinda, S.; Pusponegoro, Annisa; Alam, Hilman Syaeful; Destiana, Irna Dwi; Nurjanah, Sarifah; Widyasanti, Asri; Fawaiz, Husni Syamil
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 7, No 4 (2024)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2024.007.04.3

Abstract

Viola cornuta is an edible flower known for its high antioxidant content and aesthetic appearance. Advanced technologies, such as nanobubbles, combined with optimized cultivation methods, can greatly improve floral quality. Nanobubbles, gas bubbles with a diameter of < 200 nm, can increase dissolved gas levels in liquids. This study aimed to analyze the application of nitrogen nanobubbles on Viola cornuta growth and its effect on post-harvest quality. The experiment was carried out where the plants were cultivated in pots with a Nutrient Film Technique (NFT) irrigation system without a gully cover. Nitrogen nanobubbles were dissolved in nutrient solution every 30 minutes in the morning, delivered at a flow rate of 1 liter per minute through a swirling-flow nozzle. The results revealed that the application of nanobubbles during cultivation did not significantly affect most growth parameters, except for fresh weight and color (CIE Lch). However, nanobubbles significantly enhanced post-harvest quality parameters, with the exception of shelf life. Furthermore, nitrogen nanobubbles demonstrated a positive effect flower number, root length, and flower antioxidant activity. This study suggests that nitrogen nanobubles hold potential for improving the quality of Viola cornuta. Future research is recommended to explore the use of drip irrigation system with the same medium as in this study or NFT without a soil medium.
Pemanfaatan Nanobubble Karbon Dioksida untuk Memperpanjang Umur Simpan Tomat: Analisis Susut Bobot dan Kenampakan Visual Rosalinda, S.; Khoiriyah, Nurul; Alam, Hilman Syaeful
TIN: Terapan Informatika Nusantara Vol 6 No 2 (2025): July 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/tin.v6i2.7600

Abstract

Tomatoes, as a horticultural commodity, face major postharvest challenges due to their high water content and continued respiration after harvest, which lead to rapid deterioration. This results in significant economic losses for both farmers and consumers. This study aims to analyze the effect of carbon dioxide (CO₂) nanobubble technology applied through a mist generator on weight loss and visual appearance of tomatoes during storage, as a preventive solution to postharvest damage. The research method involved producing nanobubble solution by injecting CO₂ gas into water using a nanobubble generator to form nanoscale bubbles. The resulting solution was applied in mist form directly onto the tomato surface using a mist generator prior to storage. Evaluation was conducted by quantitatively measuring weight loss and qualitatively assessing visual appearance over a 14-day storage period at room temperature. The results showed that CO₂ nanobubble treatment via mist generator reduced weight loss by up to 4% compared to the untreated control. This technology was also effective in maintaining the freshness and visual quality of tomatoes during extended storage. These findings confirm that carbon dioxide nanobubble application through a mist generator is a promising and environmentally friendly alternative technology for extending the shelf life of fresh horticultural produce.
The Implementation of Micro/Nanobubbles (MNBs) Technology to Treat Basin Water as The Primary Water Source for Hydroponics in Greenhouse Yusuf, Asep; Asdak, Chay; Muhaemin, Mimin; N.P, Sophia Dwiratna; Sugiarto, Anto Tri; Alam, Hilman Syaeful
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.v13i1.197-204

Abstract

The greenhouse plays a pivotal role in creating an ideal environment for hydroponic cultivation. The greenhouse has utilized rainwater and basin water as a source of raw water for hydroponic farming. Presently, the water quality of Leuwi Padjadjaran basin fails to meet the standards required for hydroponics due to its turbidity, sediment content, discoloration, pH levels exceeding 7, and low dissolved oxygen (DO) concentration of 2.2 mg/l. The micro/nanobubbles (MNBs) technology stands as a viable method for water treatment owing to its capacity to bind impurities via radical OH. The application of MNBs for the treatment of basin water involves the use of a hydrodynamic cavitation MNBs generator with a dual-chamber rotating flow nozzle. The parameters evaluated in this research encompass DO concentration, MNBs stability, microbubble size, and the visual response to MNBs application. MNBs treatment was conducted with three different gases: air, oxygen, and ozone. Microbubbles were measured using the particle image velocimetry (PIV) method. The DO concentration reaches 21.6 mg/l when employing oxygen-based MNBs. On the third day post-generation, MNBs stability still maintains DO concentrations above the initial levels. Thus it can be used as hydroponic raw water.  Keywords:  DO concentration, Greenhouse, Micro/nanobubbles, Water treatment.
The Application of Nanobubble Technology in Hydroponic SWU-01 to Increase Dissolved Oxygen Concentration and Lettuce Plant Growth Yusuf, Asep; Asdak, Chay; Muhaemin, Mimin; Fuadah, Eza Zahrotul; Dwiratna, Sophia; Nanda, Muhammad Achirul; Sugiarto, Anto Tri; Alam, Hilman Syaeful
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.v13i4.1395-1402

Abstract

Hydroponic model SWU-01 is a new hydroponic system innovation that regulates watering automatically and independently by utilizing gravity and Archimedes' law. Dissolved oxygen concentration in SWU-01 is only around 3-4.2 mg/L. DO values can be increased by applying nanobubble technology. Ultrafine bubble or nanobubble is a gas bubble in a liquid that has a diameter of <200 nm. The purpose of this study was to determine the effect of nanobubble on dissolved oxygen concentration and growth of lettuce plants cultivated with SWU-01 hydroponics. The experiment used a one-factor randomized complete block design, namely intermittent administration of nanobubble for 15 min every 3 day (P1) and 7 days (P2), and without nanobubble (P0l). The results obtained based on the ANOVA test at the 5% level with the Least Significant Difference (LSD) follow-up test, namely the parameters of fresh weight and number of leaves of lettuce P1 significantly different from P0 and P2, and no significant differences were found in root length, canopy width, and plant height. The P1 treatment is more effective in increasing dissolved oxygen concentration, leaf count, and fresh weight of lettuce produced in lettuce cultivation using the SWU-01 hydroponic system. Keywords: Dissolved oxygen, Hydroponics, Lettuce, Nanobubbles, Plant growth.
Perancangan Purwarupa Pengukur Kadar Air dan Kualitas Pangan Komoditas Beras dan Jagung Menggunakan Sensor Kapasitif Firmansyah, Dudi; Rahmawati, Riski Amalia; Firmansyah, Vera; Gianto, Gianto; Sutanto, Willi; Waras, Nandang Gunawan Tunggal; Yasri, Budi; Muslim, Azis; Irwanto, Decky Ari; Karsono, Eko; Alam, Hilman Syaeful; Sanjaya, Ari Susandy
Jurnal Otomasi Kontrol dan Instrumentasi Vol 16 No 2 (2024): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2024.16.2.6

Abstract

Water content is an indicator that can affect food quality and safety as well as commodity prices. Therefore, measuring the moisture content of commodities is important to ensure the food system viability. The development of increasingly sophisticated technology has led many companies to introduce water content measuring instruments called Moisture Content Meters (MCM). However, this tool is marketed at an expensive price. In this research, a prototype for measuring the moisture content and food quality of rice and corn commodities using a cheap capacitive sensor has been successfully made according to the design. Based on the testing results, this prototype has an accuracy value of 98,9%, precision of 97,4%, and error of 1,1%. The test results show that this prototype is accurate enough to measure the moisture contents of rice and corn samples, accompanied by consistent food quality indications according to applicable quality standards.  
Penerapan Micro/Nanobubble Generator Tipe Nosel Aliran Berputar pada Aerosol Serai Wangi Yusuf, Asep; Ramadhan, Naufal Fauzi; Alam, Hilman Syaeful
Teknotan: Jurnal Industri Teknologi Pertanian Vol 19, No 3 (2025): TEKNOTAN, Desember 2025
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol19n3.11

Abstract

Produk samping dari proses penyulingan minyak atsiri berupa aerosol sering kali tidak dimanfaatkan secara optimal dan bahkan dapat menimbulkan dampak negatif terhadap lingkungan. Penelitian ini bertujuan untuk mengembangkan dan menerapkan teknologi nanobubble sebagai metode alternatif dalam memisahkan minyak atsiri dari aerosol, serta mengurangi beban limbah biologis, kimia, dan fisik. Nanobubble dihasilkan melalui generator tipe nosel aliran berputar berbasis kavitasi hidrodinamik, menggunakan berbagai jenis gas (udara, oksigen, dan ozon). Karakterisasi dilakukan dengan mengukur konsentrasi oksigen terlarut, pH, konduktivitas, dan ukuran gelembung mikro. Hasil menunjukkan bahwa generator yang dikembangkan mampu menghasilkan nanobubble dengan ukuran rata-rata gelembung mikro 18,85 μm, serta meningkatkan efisiensi pemisahan minyak atsiri dalam aerosol serai wangi. Nanobubble ozon dan oksigen menunjukkan performa yang lebih baik dibandingkan udara biasa dalam meningkatkan konsentrasi oksigen terlarut dan perubahan parameter fisik-kimia lainnya. Teknologi ini berpotensi untuk diterapkan dalam pengolahan limbah industri minyak atsiri secara berkelanjutan.
Co-Authors A.A. Ketut Agung Cahyawan W Ahmad Aminudin Ari Susandy Sanjaya, Ari Susandy Aris Munandar Arjon Turnip Asep Yusuf Asri Widyasanti Azis Muslim, Azis Bahrudin Bahrudin Chay Asdak Demi Soetraprawata Dyah Kusuma Dewi Fawaiz, Husni Syamil Firmansyah, Dudi FIRMANSYAH, VERA Fuadah, Eza Zahrotul Gianto Gianto Imam Djunaedi, Imam Irwanto, Decky Ari John Sasso, John Karsono, Eko Mimin Muhaemin Muhammad Achirul Nanda Muhammad Kasim N.P, Sophia Dwiratna Nurul Khoiriyah Oktora, Grace Indah Pudji Irasari Pusponegoro, Annisa Rahmawati, Riski Amalia Ramadhan, Naufal Fauzi Rian Adi Putra, Rian Adi S. Rosalinda, S. Sarifah Nurjanah Sophia Dwiratna, Sophia Sugiarto, Anto Tri Sutanto, Willi Waras, Nandang Gunawan Tunggal Yasri, Budi ‪Irna Dwi Destiana