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All Journal Jurnal Rekayasa Mesin Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil JUrnal Riset Ilmu Pendidikan
Nisa, Kartini Rahman
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Civil Engineering, Building, Construction & Architecture Education Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Transportation Other

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Ability of Moringa Ore (Moringa Oleifera) As Biosorbent in Used Cooking Oil Processing Buluk, Susana; Leto, Kristina Tresia; Nisa, Kartini Rahman
Jurnal Riset Ilmu Pendidikan Vol. 3 No. 2 (2023): Jurnal Riset Ilmu Pendidikan
Publisher : Lembaga Riset Mutiara Akbar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/jrip.v3i2.352

Abstract

The results of this study stated that the use of activated moringa ore biosorbents had a great influence on the quality of cooking oil both physically and chemically. The results of data analysis based on variations in contact time and dose variations can show that free fatty acid levels have decreased but are not in accordance with the stipulated SNI, namely 0.17%. Activation of Moringa ore using Sodium Hydroxide (NaOH) can reduce the levels of free fatty acids in used cooking oil. Variation of biosorbent contact time can affect the decrease in fatty acid levels, which occurs at the optimum contact time of 90 minutes, the free fatty acid percentage of 0.17% is not in accordance with SNI. Variations in biosorbent doses can also affect the increase in free fatty acid levels, namely the optimum dose of 1.00-gram percentage of free fatty acids decreased by 0.17% not according to SNI. Variations in contact time and variations in optimum doses of biosorbents can also affect color organoleptic tests and the smell of used cooking oil. Where the results of each respondent's statement that 95% of the refined oil using Moringa ore biosorbent are similar to new cooking oil, namely with a bright yellow color. The method used in this study is a quantitative method by conducting experiments on the subjects to be studied and used as a reference for finding and obtaining data directly through observation or experimentation
Pemanfaatan Limbah Serat Alam Kulit Buah Kelor Sebagai Papan Komposit yang Diperkuat Polimer Unsaturated Polyester Resin Jayadin, Jayadin; Nisa, Kartini Rahman; Siti Zuraidah; Leto, Kristina Tresia; Coa, Sri Astuti Rahman; Nurhadyati, Nurhadyati; Mujiburohman, Muhammad; Hikmatiar, Hamzarudin
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 2 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i2.17786

Abstract

The use of Composite Materials with natural fiber reinforcement is starting to be widely known in the manufacturing industry, environmentally friendly and recyclable materials. Composites are made to obtain lightweight structures, have higher strength or stiffness, energy absorption and design, have low prices and natural fibers are also easy to obtain, especially moringa fruit skin which is very abundant in the East Nusa Tenggara region, especially in Sikka Regency. This study aims to determine the Bending strength, impact energy and seawater absorption capacity. The research materials are moringa fruit skin fiber and polyester resin. Moringa fruit skin fiber is a waste that is rarely used so it can be a serious waste. This specimen is used with the Cold Compressing Molding method (Molds that are loaded at room temperature). The results of the study showed optimal conditions at a volume fraction of 25%, providing the highest Bending strength of 8,888 MPa, the highest impact energy of 0.196 J / mm2, and the lowest seawater absorption value of 0.79%.
Utilization of Moringa Fruit Peel Waste and Sawdust as Hybrid Composite Boards with Polyester Resin Matrix Leto, Kristina Tresia; Jayadin; Ridwan, Mastura; Coa, Sri Astuti Rahman; Nisa, Kartini Rahman; Mujiburohman, Muhammad; Ismiralda, Ismiralda; Farizi, Zakaria Al
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.6941

Abstract

Environmental damage, previously considered a local problem, has now developed into a global issue, with waste becoming an increasingly pressing issue, especially in developing countries. Inadequate waste management has the potential to cause serious impacts on environmental sustainability and human health. One type of waste that has not been optimally utilized is moringa fruit peel waste and wood sawdust. This waste often causes soil and air pollution because it is left to pile up and burned. Therefore, this study aims to develop a Hybrid composite that combines moringa fruit peel waste and wood sawdust as a reinforcing material, as well as to test the mechanical and physical properties of the resulting composite board. This study uses an experimental approach in the laboratory with variations in waste composition (15%: 5%: 80%), (20%: 10%: 70%), (25%: 15%: 60%) and a composite board thickness of 1 cm. Testing parameters include tensile tests, compression tests, and water absorption. The tensile test results show that the composition of 15% moringa fruit peel fiber and 5% wood sawdust produces the highest tensile strength of 13.622 Mpa. Compression tests showed that a composition of 20% moringa rind fiber and 10% sawdust produced the highest compressive strength of 25.527 MPa. Water absorption tests showed that a composition of 25% moringa rind fiber and 15% sawdust had the lowest, or optimal, water absorption of 1.8%.
Co-Authors Buluk, Susana Coa, Sri Astuti Rahman Farizi, Zakaria Al hikmatiar, hamzarudin Ismiralda, Ismiralda Jayadin Kristina Tresia Leto Mujiburohman, Muhammad Nurhadyati, Nurhadyati Ridwan, Mastura Siti Zuraidah