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All Journal JURNAL TEKNOLOGI TECHNOSCIENTIA Journal of Engineering and Applied Technology
Sidharta, Bambang Wahyu
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Mechanical Engineering

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PENGARUH KONSENTRASI ELEKTROLIT DAN WAKTU ANODISASI TERHADAP KETAHANAN AUS, KEKERASAN SERTA KETEBALAN LAPISAN OKSIDA PADUAN ALUMINIUM PADA MATERIAL PISTON Sidharta, Bambang Wahyu
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 1 Agustus 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v7i1.587

Abstract

Aluminum alloys used in the manufacture of automotive parts, such as piston, wherein the component is fast moving parts, which would have to meet certain physical and mechanical properties such as wear resistance and hardness. To improve the physical and mechanical properties such as wear resistance and hardness in aluminum alloy, then the anodizing process was chosen, because this process will increase the hardness and wear resistance of the metal. The increasing of hardness and wear of the aluminum alloy is due to the aluminum oxide layer formed on the anodizing process.The purpose of this study was to determine the effect of electrolyte concentration and time of anodizing process against hardness and wear resistance , as well as the thickness of the oxide film on aluminum alloy as the piston material.The process of anodizing of aluminum alloys performed at different electrolyte concentrations, i.e. 15, 20 and 25% vol. H2SO4 (sulfuric acid) with the addition of 6% wt. H2C2O4 (oxalic acid) at each concentration of sulfuric acid. The length of the anodizing time for each electrolyte concentration of 3, 5 and 7 minutes, while the electric voltage used is 24 volts.From this research, the best results obtained by anodizing using electrolyte 15% vol. H2SO4 + 6% wt. H2C2O4 for 7-minute process that increase the material hardness from 115 to 190 VHN; and the best specific wear ​​(Ws) 7.15 x 10-5 mm2/kg and the thickest oxide layer 83.81 μm.
Techno-feasibility assessment on utilization of rice husk and wood scrap as energy sources of the rotary drier while drying BSF maggot Purwaka, Purwaka; Susastriawan, Anak Agung Putu; Saputra, Hadi; Rahayu, Suparni Setyowati; Hidayat, Taufiq; Sidharta, Bambang Wahyu; Mathur, Akanksha
Journal of Engineering and Applied Technology Vol. 5 No. 2 (2024): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v5i2.75953

Abstract

Black Soldier Flies (BSF) maggot business got increasing attention nowadays, especially dried BSF maggot. The dried BSF maggot is very suitable for fish feed, thus dried maggot business has good prospectus not only in terms of financial sector but also in terms of waste management sector. Unfortunately, making dried maggot requires high cost during drying process, since additional cost for LPG is needed. It is important to replace LPG fuel by less expensive one, such as biomass fuel. Indonesia has huge potential of biomass energy sources which mainly come from agricultural, forestry, and industrial waste. The present work aims to investigate techno-feasibility of rice husk and waste scrap waste as feedstock of rotary drum drier. The experimental work is conducted by drying 10 kg fresh BSF maggot for 2 hours in the drier using blend feedstock of 6 kg rice husk- 6 kg wood scrap (RH-WS) and feedstock of 12 kg wood scrap (WS). The results depict that the waste of rice husk and wood scrap are technological feasible as energy sources for rotary drum dryer while drying BSF maggot. The performance of the drier in terms of drying rate, drying heat, specific fuel consumption, and drier's effectiveness is better when a blend of rice husk and wood scrap is used as a feedstock. The values of drying rate, drying heat, specific fuel consumption, and drier's effectiveness when using blend feedstock are 0.92 g/s, 20996.37 kJ, 27940.15 kJ/kg, and 0.67, respectively. It is recommended to use waste of rice husk and wood scarp in blending form to obtain optimum performance of the rotary drier while drying BSF maggot.
Co-Authors Fachry Abda El Rahman Hadi Saputra Mathur, Akanksha Purwaka, Purwaka Suparni Setyowati Rahayu Susastriawan, Anak Agung Putu