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All Journal Journal of Mechanical Science and Engineering AUSTENIT Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Mechanical Jurnal Teknik Kimia Unram Journal of Community Service (UJCS) SRIWIJAYA JOURNAL OF ENVIRONMENT Makara Journal of Science International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)

Agung Mataram

Universitas Sriwijaya

Author-ID : 2491210

Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

Published : 13 Documents Claim Missing Document

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STRUCTURAL AND CHARACTERIZATION POLYACRYLONITRILE NANOFIBER FOR AIR FILTRATION ASSEMBLED BY ELECTROSPINNING Mataram, Agung; Ismail, A.F.
Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Vol 1, No 1 (2011): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 2 2011
Publisher : Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar

In electrospinning, the structure of nanofibers, which is affected by polymer solution parameters and processing conditions, influences the physical characteristics of nanofiber mats. In this study, under optimum conditions of electrospinning, the concentration of polyacrylonitrile (PAN) was changed 14, 16 and 18 wt %, and its effects on the nanofiber diameter and pore size of nanofiber mats were studied. The results showed that increasing the PAN polymer concentration enhanced the nanofiber diameter and pore diameter of nanofiber mats. Keywords: electrospinning; concentrations; pore size

Peningkatan ketangguhan dan ketahanan fatik siklus rendah pada baja ASSAB 709 M melalui proses annealing Helmy Alian; Nukman Nukman; M. Badaruddin; Agung Mataram; Qomarul Hadi
Jurnal Teknik Kimia Vol 27 No 3 (2021): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v27i3.813

Baja yang diaplikasi pada komponen-komponen mesin karena mengalami kondisi kerja yang berat dan adanya beban siklik yang lama harus memiliki kekuatan tinggi dan daktilitas yang tinggi. Penelitian ini, baja ASSAB 709 M diberi perlakuan panas annealing untuk memperbaiki sifat mekanik, perilaku fatik siklus rendah dan ketangguhan baja tersebut. Proses annealing dengan memanaskan spesimen di dalam furnace sampai temperatur austenisasi 825 °C, dengan waktu tahan 30 menit kemudian didinginkan perlahan sampai temperatur kamar . Sebelum dan sesudah proses annealing, dilakukan uji tarik, uji fatik siklus rendah (low cycle fatigue) dengan memvariasikan amplitude 0,0035 - 0,0110, impak, struktur mikro menggunakan optical microscopy(OM) dan permukaan fraktur dari spesimen dianalisis dengan menggunakan scanning electron microscopy (SEM). Struktur mikro baja ASSAB 709 M mengalami perubahan setelah annealing, dari banyaknya martensite lath menjadi terbentuknya pearlite and ferrite.. Perubahan mikrostruktur tersebut menyebabkan perubahan perilaku pada amplitudo regangan rendah dan tinggi akibat proses annealing. Peningkatan tegangan tekan dan peningkatan ketahanan kelelahan siklus rendah (low cycle fatigue) dari baja yang di annealing tergantung pada amplitudo regangan yang diterapkan.

Peleburan Skrap Aluminium pada Tungku Krusibel berbahan Bakar Batubara Hasil Proses Aglomerasi Air-Minyak Sawit Nukman Nukman; Agung Mataram; Irsyadi Yani
JURNAL MECHANICAL Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v6.i1.201502

Smelting aluminum scrap in a small capacity can be done on a simple furnace crucible. As fuel furnaces used type of semi-anthracite coal briquettes, bituminous and sub-bituminous from Tanjung Enim which has been through the washing process by agglomeration method using water-oil palm. Calorific value, the contents of water and hydrogen calculated in the energy balance. Aluminum scrap smelted at a temperature 1023oK. Furnace by coal briquette which has a 23.38% efficiency,, crucible can melt 50 kg of aluminum scrap by 6.47 kg of briquettes for 1 hour 46 minutes.Keywords:coal briquette, coal aglomeration, aluminum scrap, crusible furnace

EFFECT OF THICKNESS LAYER OF KENAF FIBRE REINFOECED FIBRE GLASS, AGAINST IMPACT OF HYBRID COMPOSITE SANDWICH WITH CORE SENGON Agung - Mataram; Narwi Panggar Besi
Journal of Mechanical Science and Engineering Vol 6, No 1 (2019): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.881 KB)

The purpose of this research is to know the impact strength of composite structures of sengon laut sawdust. Experimental results show that the impact toughness of sandwich composite will increase as the thickness of composite sandwich skin increases. The impact failure is due mostly to the shear failure of the core. Brittle specimen failure occurs on the sandwich composites structured with skin and core manufactured with the same thickness of 5 mm. This brittle sandwich composite has a flat cross section on both sides of the fault. The shear failure of the cores occurs in samples with 2 mm thick, 3 mm, 4 mm thick, and 10 mm thick core. In some samples, the shear failure of the cores is accompanied by cracks on the core so that the sandwich composite is broken in several parts. The highest value of absorption energy and the highest impact strength is found on thick composite sandwich variation of 10 mm thick with 4 mm thickness of 2,7860 J and 0,01032 J/mm2.

Treatment of Wastewater from Rubber Industry Using Calcium Carbide Residue Adsorbent and Hybrid Membrane UF – RO Susi Susanti; Subriyer Nasir; Hermansyah Hermansyah; Agung Mataram
Sriwijaya Journal of Environment Vol 4, No 1 (2019): PLANT AND FORESTRY
Publisher : Program Pascasarjana Universitas Sriwijaya

Hybrid UF – RO membrane technology is one of the new technologies of separation wastewater from the rubber industry to decrease turbidity and heavy metal contents such as iron and zinc. This technology is being used to replace the conventional installation process of wastewater treatment. Processing wastewater treatment from the rubber industry with the hybrid UF – RO membrane can produce permeate with quality standards, making it possible to be recycled as domestic water for water process in the industry. The technology of wastewater treatment from the rubber industry in this experiment involved the pre-treatment stage, using sand filter and adsorption using calcium carbide residue. The operating variables by flow rate into the UF and RO were 7 and 14 L.Min-1 and operation time were 15 to 90 minutes. The results of this study showed that the percentage reduced were 62.73% for turbidity, 83.28% for iron and 88.89% for zinc, respectively. Finally, it can be concluded that calcium carbide residue was potential to reduced turbidity and heavy metals such as iron and zinc from rubber industry wastewater.

Rubber Industry Wastewater Treatment Using Sand Filter, Bentonite and Hybrid Membrane (UF-RO) Elsa Rama Lumban Gaol; Subriyer Nasir; Hermansyah Hermansyah; Agung Mataram
Sriwijaya Journal of Environment Vol 4, No 1 (2019): PLANT AND FORESTRY
Publisher : Program Pascasarjana Universitas Sriwijaya

The study aims to utilize Hybrid Membrane Technology (UF-RO) in reducing turbidity, iron and zinc in the liquid waste of the rubber industry. The pre-treatment process used was filtration and adsorption. The filtration process used filter columns containing silica sand and activated carbon, while the adsorption process used an adsorbent column containing bentonite. After the pre-treatment process, it was continued with the application Hybrid Membrane (UF-RO). The variables of the study were operation time of 15 to 90 minutes and flow rates of 7 and 14 L/min. The results showed that the optimum removal percentage of iron and zinc in the Reverse Osmosis Membrane was 84.86% and 96.29% at the feed flow rate of 14 L/min. The optimum removal percentage turbidity of 99.70% was achieved at the feed flow rate of 7 L/min in the Reverse Osmosis Membrane. Finally, rubber industry wastewater treatment using Hybrid Membrane (UF-RO) was able to reduce turbidity, iron and zinc content, and the results were accordanced with the quality standards regarding Water Quality.

Utilization of Fly Ash For the Pretreatment Process of Rubber Industry Wastewater Processing Using Hybrid Membrane UF-RO Meta Mediana; Subriyer Nasir; Hermansyah Hermansyah; Agung Mataram
Sriwijaya Journal of Environment Vol 4, No 1 (2019): PLANT AND FORESTRY
Publisher : Program Pascasarjana Universitas Sriwijaya

This research was conducted to treat rubber industry wastewater by using fly-ash as an adsorbent and hybrid membrane UF-RO to produce clean water. In this research was analyzed the effect of flow rate of wastewater treatment to remove turbidity, zinc, and iron. The applied flow rate of membrane separation was of 7 L/min and 14 L/min and the operation time was of 90 min respectively. The rejection concentration of turbidity, zinc, and iron decreased with increasing the flow rate at adsorbent fly-ash. Whereas at the hybrid membrane UF-RO, the rejection concentration of turbidity, zinc, and iron increased with increasing the flow rate. The maximum rejection of turbidity was 24.26%, 95%, and 67.89% for adsorbent fly-ash, UF membrane, and RO membrane respectively. The maximum rejection of zinc was 91.67%, 59.70%, and 14.81% for adsorbent fly-ash, UF membrane, and RO membrane respectively. The maximum rejection of iron was 62.24% and 21.62% for adsorbent fly-ash, UF membrane respectively. The pollutants concentration in the permeate was met the quality standards of the Indonesian health department through the decision of the Minister of Health number 907 of 2002 concerning supervision of the quality of drinking water.

Finite Element Analysis of Reinforcement Design in Takeup Tower Under Dynamic Loading Conditions Praja Dilla Atos; Romli, Romli; Nanda Yusril Mahendra; Agung Mataram; Amrifan Saladin Mohruni
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 2 No. 2 (2024): IJMEAS - May
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v2i2.271

This research focuses on the finite element analysis for the design of reinforcement towers under dynamic load conditions. The reinforcement tower is a crucial part of the retrieval system that supports the system’s optimal function. This study identifies critical areas and plans reinforcement design steps on the construction of the retrieval tower. Stress analysis helps determine reinforcement design steps based on established standards and analytical approaches. The finite element method is used to analyze the design of the retrieval tower. The model is meshed into small triangular parts to find solutions in the form of finite element analysis of reinforcement tower design under dynamic load conditions. The results of finite element computation show normal stress fluctuations and increased displacement over time, indicating material deformation. This analysis is essential for understanding material behavior and designing systems that can effectively withstand dynamic loads.

Synthesis of Activated Carbon from Coconut Shell and Recycled Styrofoam Nanofiber for Water Filtration Dani, Rahma; Ismet, Ismet; Marlina, Leni; Alisya, Rona; Aldi, Muhamad Abel Kirana; Ludiansyah, Anggi; Kurdiati, Lintang Auliya; Idjan, Meutia Kamilatun Nuha AP; Mataram, Agung; Almafie, Muhammad Rama; Sriyanti, Ida
Makara Journal of Science Vol. 28, No. 4
Publisher : UI Scholars Hub

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Water pollution affects life sustainability; hence, several efforts have been exerted to overcome this problem. For ex-ample, nanofiber membrane technology is introduced to retain solutes while allowing only water molecules to pass through the system. Therefore, this study aimed to maximize the technology for water filtration using the electrospin-ning method by combining Styrofoam waste-based polymer with activated carbon from coconut shell waste (ACCS). The nanofiber diameter produced ranged from 590 nm to 610 nm with porous characteristics and without beads. The carbon content varied from 68.04% to 69.84%, according to the energy dispersive X-ray measurement, demonstrating the composite’s effectiveness. The Fourier transform infrared spectroscopy results also indicated carbonization and activation, along with water removal, associated with O-H stretching vibrations of alcohol and phenol, as well as N-H stretching vibrations of amino bonds. Moreover, the mechanical properties were measured using a single-fiber tensile test on X-ray diffractometry (XRD) analysis, and Young’s modulus was successfully maintained at 3,209.15 ± 632.877 and 1,839.12 ± 212.637 kPa due to the material amorphous nature. The contact angles were 126.5° and 131°, demon-strating ultra-hydrophobic properties. The addition of ACCS has led to a superior porosity structure for waste filtration. The clean water permeability test also showed that the membrane can withstand a 1–4 bar pressure for 15–60 seconds, demonstrating its strength in resisting water resistance. The trend shows the capacity of the material to potentially func-tion as a superior candidate for water filtration.

COMPOSITE MATRIX POLYESTER REINFORCE FIBRESKIN GELAM; PREPARATION AND MECHANICAL PROPERTIES Mataram, Agung; Rizal, Samsul; Zamheri, Ahmad
AUSTENIT Vol. 7 No. 1 (2015): AUSTENIT: April 2015
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (478.86 KB)

Gelam (melaleuca leucandendra) is one plant that is widely available in South Sumatra potential into cellulose extraction. His plant is widely used for building materials and wood products processed the rest of the powder timber furniture industry. While, the skin of this plant is not used for anything. In fact, fromÂ the structure of the skin that have fiber, skin of gelamÂ has the potential to be a valuable product, one of them with a matter in the form of composite reinforcement. While today's technology demands urgent environmental friendly technology product makers, especially friendly to the environment. The analysis conducted in this study utilizes softwood bark fiber serves as reinforcement to resin volume fraction ratio : Resin 100% : Filler 0%(A), Resin 90% : Filler 10% (B) Resin 80% : Filler 20%(C), Resin 70% : Filler 30%(D), Resin 60% : Filler 40% (E). Observed characteristics are kekutan composite tensile and impact strength. On average the highest tensile stress is the value obtained from the variation of the volume fraction of the specimen D (70% resin: 30% fiber) that is equal to 17.96 N/mm2, while the average value obtained from the lowest voltage variation of the volume fraction of the specimen B (90 % resin: 10% fiber) that is equal to 12:35 N/mm2. The average value of tensile strain obtained specimens A, B, C, D and E are the same, namely 0.68%. High MOE happens to specimens B, C and E, it indicates that the greater the value of the modulus of elasticity of the material is more difficult to increase the length, in this case the smallest specimen D modulus of elasticity. The average value of the energy required to break the specimen is equal to the highest Joule 34.728, obtained from the variation of the volume fraction of specimen D (70% resin: 30% fiber).

Co-Authors A.F. Ismail Aditya, B. B. Aldi, Muhamad Abel Kirana Alian, H. Alisya, Rona Almafie, Muhammad Rama Amrifan Saladin Mohruni Anisya, N. Bactiar, M Baehaqi Bizzy, I Dani, Rahma Elsa Rama Lumban Gaol Firmansah, Hari Gaol, Elsa Rama Lumban Helmy Alian Hermansyah Hermansyah Hermansyah Ida Sriyanti Idjan, Meutia Kamilatun Nuha Ap Irsyadi Yani Irwin Bizzy Ismet Ismet, Ismet Jambak, M.I Kurdiati, Lintang Auliya Kurnia, A.Y Kurnia, R.D Leni Marlina Ludiansyah, Anggi Lugantha Perkasa M. Badaruddin M.I. Jambak, M.I. Mediana, Meta Meta Mediana Mohruni, A.S Mohruni, A.S. Nanda Yusril Mahendra Narwi Panggar Besi Nasution, J. D. Nasution, J.D Nukman Nukman Pataras, M Pataras, M. Praja Dilla Atos Qomarul Hadi Riman Sipahutar Rizal, S Rizal, S. Romli Romli, Romli Sanjaya, Muhammad Rudi Subriyer Nasir Subriyer Nasir Susi Susanti Susi Susanti Sutanto, H Syahputri, Selvia Mariska Zamheri, Ahmad

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