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Radissa Dzaky Issafira
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Department of Mechanical Engineering, Faculty of Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur 1st floor Giri Reka Building, East Java, Indonesia Jl. Raya Rungkut Madya, Gunung Anyar Surabaya Jawa Timur 60294 Indonesia
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Jawa timur
INDONESIA
Biomedical and Mechanical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Jawa Timur
ISSN : -     EISSN : 27761983     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The Biomej Journal is published by the Mechanical Engineering Study Program, Faculty of Engineering, East Java "Veteran" University, Surabaya-Indonesia. Biomej is an open-access peer review journal that mediates the dissemination of academics, researchers, and practitioners in the field of mechanical engineering and accepts journal publications from all over Indonesia. Biomej aims to provide a forum for national and international academics, researchers and mechanical engineering practitioners to publish original articles. All accepted articles will be published and will be freely available to all readers with wide visibility. The scope of the Biomej Journal is including widely topics in engineering such as: 1. Biomedical engineering 2. Tribology 3. Modelling 4. Finite ELement Method 5. Material Science 6. Mechatronics 7. Structural and Machiine Design 8. Stress Analysis 9. Renewable Energy 10. Structural Mechanics 11. Thermodynamics 12. Material Processing 13. Fatigue and Air Conditioning 14. Heat Transfer 15. Manufacturing 16. Fluid Mechanics 17. Combustion 18. Aeodynamics 19. Environmental Protection 20. Acoustic and Noise 21. Energy Studies 22. Refrigerationand Air 23. Conditioning 24. Engines and Turbines 25. Thermodynamics 26. Earth Science 27. Natural Hazards 28. Food Technology Processing
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 90 Documents
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Combination Filtration - Ultraviolet Unit to Reduce the Organic Content and Pathogens of Domestic Wastewater For Clinical Activities R Novembrianto; Munawar; M A S Jawwad; R H A Murti; W D Lestari; M N Rhomadhoni
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The rise of clinical activities is one of the health care facilities that have the potential to pollute wastewater on organic compounds and especially pathogenic microorganisms. Technology in reducing organic and pathogenic content using combined ultraviolet filtration in wastewater treatment systems is one the effective method. Filtration uses activated carbon and silica with a variation of the ratio 2:3 and 3:2, while ultraviolet use a power variation of 9 watts and 15 watts. The results obtained are the best composition from the filtration process, which is a ratio of 2: 3 with the ultraviolet process using 15 watts using an exposure time of 5 hours with the remaining total coliform as much as 200 MPN/100mL. The results of this research have complied with the quality standards.
Analysis of Air Flow Rate in Bulkhead Reactors on Struvite Mineral Luluk Edahwati; S Sutiyono; Suprihatin
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Struvite is a white crystalline chemical known as magnesium ammonium phosphorus hexahydrate (MgNH4PO4.6H2O). Struvite is soluble in acidic conditions and slightly soluble in neutral and alkaline conditions. In industry, struvite is known as scale in pipes. Urinary stones can be called struvite because struvite crystals can form easily in the urine of animals and humans infected with ammonia organisms produced in the urine. Struvite can potentially be formed by alkaline urine and high magnesium excretion due to a high magnesium plant- based diet. The formation of struvite minerals is carried out in an insulated reactor by mixing a solution of MgCl2, NH4OH, and H3PO4 in a ratio of 1:1:1. The treatment of struvite mineral formation was carried out with a feed inlet rate of 35 ml/minute, the temperature at the reactor was carried out at 30oC while the intake air rate was carried out in the range of 0.25-1.25 liters/min. The pH of the solution was kept at a value of 9. The process was carried out until a steady state was reached.  The formation of struvite minerals using an insulated column reactor was obtained at conditions of pH 9, operating temperature of 30oC and air rate of 1.25L/min.
Analysis of Combustion Temperature on the Use of B100 and B20 Fuels that Operate in the Long Term W Saputro; J Sentanuhady; L Edahwati; A K Faizin
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Indonesian people's reliance on diesel fuel is still quite strong, as seen by the rising yearly use of diesel. Because diesel is a fossil fuel that is not renewable, rising diesel usage is a concern that must be anticipated. One approach to deal with this is to switch from fossil fuels to biofuels like biodiesel. Because Indonesia is the world's largest producer of palm oil, biodiesel from palm oil is an alternative. Although biodiesel may potentially be used directly in diesel engines, there are few researches on the impacts of utilizing it and the possibility for further development. As a result, the goal of this research is to look at the combustion temperature of B100 and B20 fuels in long-term testing. Two Kubota diesel engines with 376 cc cylinder volumes are used in this investigation. Each engine will be connected to a generator that will provide 4000 W of electricity to the halogen bulbs. The two engines will run on separate fuels, with the first using B20 and the second on B100 from palm oil. The engine has a continuous rotational speed of 2200 rpm and has been running for 300 hours without stopping. The combustion temperature of the cylinder head, cylinder block, and exhaust gas pipe is measured every multiple of 4 hours. With 1.7 percent, 1.2 percent, and 2.7 percent, respectively, the B100 engine delivers lower combustion temperatures in the cylinder head, cylinder block, and pipe exhaust gas.
Identification of Cetane Number in Solar Fuel from Pyrolysis of Plastic Waste T Towijaya; K Anam; W D Lestari
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The use of fuel is currently increasing, as well as the increasing number of plastic waste that comes from household and industrial waste. The need for processing plastic waste to reduce the volume of waste is very necessary. One type of plastic waste is the type of polypropylene. This type of polypropylene plastic waste is a type of waste that can be used as a basic material to produce alternative fuels in the types of diesel, gasoline, and kerosene. In this research work, a test will be carried out to determine the cetane number of this type of diesel fuel produced by the pyrolysis process, to the treatment of temperature and time variables so that a high cetane number is produced. Plastic waste processing uses pyrolysis and distillation methods to produce alternative fuels with processing temperatures of 190ºC, 200ºC, and 225ºC in 3 hours, 4 hours, and 5 hours. From testing the cetane number on the pyrolysis fuel, the cetane number from the process of making this alternative fuel itself reached the highest number, namely 64.1 at a processing time of 5 hours at a temperature of 200ºC.
Secondary Flow Phenomenon at Elbow Ducting of The Closed-Circuit Subsonic Wind Tunnel: An Experimental Study A K Faizin; Sutardi; L Edahwati; W D Lestari; N Adyono; R D Issafira; W Saputro; T P Sari
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The installation of elbow ducting in closed-loop wind tunnel installation will cause a pressure drop. Pressure drop was caused by flow separation and secondary flow phenomenon in the elbow ducting. The test section used in this experimental study was an octagonal elbow 90º with radius ratio (rm/Dh) = 0.6. Diameter hydraulic (Dh) elbow of 806 mm. In this study, the Reynolds number is measured based on the free flow velocity (U∞) inlet section, that is ReDh = 4.63x105. The experimental results showed the pressure drop is ΔCp = 1.46 for Re = 4.63x105. This difference in pressure value between the outer and inner (ΔCp) of the elbow ducting was caused by secondary flow. The secondary flow was observed through a horizontal velocity profile where at xi/Dh = 1.35, fluid flow was accelerated on the inner wall and decelerated on the outer wall of the ducting elbow. Then, at xi/Dh = 1.63 to xi/Dh = 2.01, there are gradual shifts of the velocity profile where the fluid flow is accelerated toward the outer wall.
Analysis of effect Magnesium Ammonium Phospate (MAP) Concentration on Struvite Morphology in A Vertical Reactor Luluk Edahwati; Sutiyono; Atika Andini; Wahyu Dwi Lestari; Tria Puspa Sari; Ndaru Adyono; Novel Karaman
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Struvite was a white crystal known as Magnesium Ammonium Phosphate Hexahydrate (MgNH4PO4.6H2O). In industry, struvite was found in the pipes crust which the hot fluid through passes. Struvite is often used as fertilizer because it contains phosphate content. The one of benefits of struvite crystals is slow release fertilizer, so it can be more durable, which is good for the growth of the plants. The Precipitation technology is currently one of the most widely applied technologies in struvite formation. The process of forming struvite is carried out by using a vertical reactor. The process started by mixing the equimolar solutions of MgCl2, NH4OH, and H3PO4 with a concentration ratio of 1: 1: 1 and 1: 1: 2. Theprocess was carried out with the condition at the 30°C while the air inlet rate was 1.25 liters/min. The pH of the solution is pH 9 and controlled using NaOH solution. The process was carried out in the steady state condition. Then the solution was filtered and solid was dried at room temperature for 48 hours. From this study, the concentration ratio of 1:1:2 was obtained the best of struvite compared to the others ratio. The solid was analyzed by using the SEM-EDX instrument. The morphology of struvite was formed an irregular pyramid like crystal or commonly referred to as an authorhombic shape.
SEM Analysis of UHMWPE for Biomedical Application Wahyu Dwi Lestari; Luluk Edahwati; Tria Puspa Sari; Ndaru Adyono; Novel Karaman
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The objective of this study is to investigate the wear mechanism of UHMWPE acetabular liner. There were three samples of acetabular liner with variations without crosslink, with crosslink doses of 50 kGy and 100 kGy which were subjected to a wear testing process. The wear test was carried out using a Tribometer wear testing machine with a total of 30,000 cycles and a load of 800N. Microstructure analysis was performed using scanning electron microscopy (SEM). The results show that the surface of the UHMWPE acetabular liner with the crosslink treatment is smoother than the untreated one. This shows that UHMWPE with crosslink treatment has a lower wear rate, where the greater the crosslink dose the lower the wear rate. The wear mechanism that occurs in this study is the third body abrasion which leads to adhesive wear.
Aplikasi Portabel Briz Meter untuk Perhitungan Indeks Bias Minyak Astiri Daun Jambu Kristal E S A Fawaid; LI Sari; C Pujiastuti; N K Erliyanti; A D Priyanto; E A Saputro
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Penentuan indeks bias minyak daun jambu kristal dilakukan dengan menggunakan Portable Brix Meter. Daun jambu kristal diekstraksi dengan bantuan gelombang mikro dengan ukuran partikel 60 mesh selama 2 ; 2,5 ; 3 ; 3,5 ; dan 4 jam. Portable Brix Meter digunakan untuk mengetahui konsentrasi minyak daun jambu kristal yang dinyatakan dalam %Brix. Besarnya nilai %Brix ini sebanding dengan indeks biasnya. Semakin besar nilai %Brix maka akan semakin besar pula indeks bias yang diperoleh. Korelasi antara %Brix minyak daun jambu C dengan indeks bias dinyatakan dengan persamaan n = 0,0026C + 1,2859. Indeks bias minyak daun jambu kristal dapat ditentukan dari nilai %Brix
Effects of pH on Adsorption of Remazol Turquoise Blue Dyez on MgO/TiO2 Nanocomposite Muhammad Abdus Salam Jawwad; Rizka Novembrianto; Ya-Fen Wang; Shen-Jie You; Restu Hikmah Ayu Murti
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

A magnesium oxide and titanium (II) oxide nanocomposite, MgO/TiO2 was synthesized to improve its surface area thus its adsorption capability may be risen. The synthesis was applying sol-gel method, combining MgO and TiO2 nanoparticles with NaOH becomes a nanocomposite with higher surface area. The pH effect on adsorption were analyzed. The expectation of using MgO/TiO2 compared with TiO2 and MgO alone is it may react faster on an adsorption trial with remazol turquoise blue dye, and the TiO2 may give its photocatalysis ability to the synthesized material. Less acid the condition of the solution, the capability of the MgO/TiO2 catalyst on adsorbing the remazol turquoise blue dye will increasing. After 90 minutes, the photocatalysis rate surpass the adsorption rate and reach equilibrium.
Analisa Uji Kelelahan ASS Kuningan 70/30 dengan Mesin Uji Tipe Cantilever Rotary Bending R Adam; N S Dera
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Ketahanan material pada masa sekarang ini sangat berperan penting dalam era teknologi. Teknologi berkembang sangat maju dan pesat seiring dengan kemajuan jaman. Berbagai penelitian telah dilakukan oleh berbagai institusi dari seluruh penjuru Dunia untuk menemukan teknologi baru. Penemuan baru tersebut sebagai modal awal untuk menciptakan teknologi yang lebih mutakhir. Seiring dengan perkembangan IPTEK yang sedemikian pesat dewasa ini. Oleh karena itu di butuhkan acuan standar uji fatigue dari suatu material agar para perancang dan pembuat memiliki patokan dasar dalam merancang atau membuat sesuatu agar tidak merugikan atau membahayakan keselamatan penikmat maupun pengguna teknologi. Salah satu cara untuk mengetahui kekuatan atau ketahanan suatu material. Tujuan penelitian hanya menganalisa siklus kelelahan dan ketahanan material Ass kuningan batangan 70/30 hingga mengalami kegagalan atau patah menggunakan metode pengujian fatigue tipe cantilever rotary bending. Konversi satuan beban Kg terhadap Mpa, Konversi satuan waktu detik terhadap waktu putaran. Berdasarkan hasil data yang di dapat dari hasil pengujian fatik tipe cantilever rotarybending yang dilakukan di lab masin fakultas teknik universitas gorontalo. Di tarik kesimpulan secara ilmiah bahwa untuk menganalisis ass kuningan 70/30 pada mesin uji fatik tipe (cantilever rotary bending) dengan jumlah spesimen 4 batang dengan durasi waktu 1 jam mendapatkan data analisis bahwa Spesimen 1 dengan Beban 20 kg mendapatkan tegangan 1.320 Mpa dan siklus 63.700 putaran dan spesimen 2 dengan beban 25 kg mendapatkan tegangan 1650 Mpa dengan siklus 40.012 putaran dan spesimen 3 dengan beban 30 kg mendapatkan tegangan 1981 Mpa dengan siklus 7.350 putaran dan untuk spesimen 4 mendapatkan tegangan 2311 Mpa dengan siklus 816 putaran.

Page 4 of 9 | Total Record : 90

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