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All Journal Jurnal Ilmiah Teknologi dan Rekayasa Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Journal of Community Development ARMATUR : Artikel Teknik Mesin dan Manufaktur Eksergi: Jurnal Teknik Energi Jurnal Teknik Terapan (J-TETA) National Multidisciplinary Sciences Jurnal Polimesin
Ulma, Zeni
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences

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Pengaruh Katalis NaOH Terhadap Proses Metilasi Senyawa Brazilein Pada Ekstrak Kayu Secang (Caesalpinia sappan linn) Ulma, Zeni; Rahayuningsih, Edia; Wahyuningsih, Tutik Dwi
Jurnal Teknik Terapan Vol. 1 No. 1 (2022): April
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (668.22 KB) | DOI: 10.25047/jteta.v1i1.6

Abstract

Reaksi metilasi adalah reaksi penggantian atom atau molekul dengan gugus metil. Beberapa parameter yang mempengaruhi proses metilasi antara lain rasio bahan dan waktu metilasi, namun hasil metilasi tidak optimal. Pada penelitian ini dilakukan penambahan katalis pada proses metilasi. Penambahan katalis berpengaruh terhadap peningkatan stabilitas warna ekstrak secang terhadap perubahan pH. Variabel yang digunakan dalam penelitian ini adalah konsentrasi katalis 0; 0,002; 0,01; 0,02; dan 0,04 mol/mL. Parameter yang diuji meliputi stabilitas terhadap pH (2, 3, 5, 7, dan 10) dan degradasi warna terhadap oksidator. Konsentrasi katalis penambahan terbaik adalah pada kisaran 0,002 hingga 0,01 mol/mL. Selain itu, adanya katalis NaOH dalam proses metilasi ekstrak secang juga dapat mengurangi degradasi warna yang disebabkan oleh adanya oksidator.
Arang Kulit Biji Kakao (Theobroma cacao L) sebagai Adsorben untuk Menurunkan Kadar Asam Lemak Bebas pada Pembuatan Biodiesel dari Minyak Jelantah Prasetyo, Dafit Ari; Saputro, Muhammad Rio Aditya; Ulma, Zeni
Jurnal Teknik Terapan Vol. 2 No. 1 (2023): April
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v2i1.22

Abstract

Indonesia as one of the largest producing and exporting countries of crude palm oil (CPO). However, Indonesia still has not utilized the potential of the waste that generated by using CPO as cooking oil, namely used cooking oil. The high content of free fatty acids (FFA) in used cooking oil will cause the saponification reaction and interfere the processing into biodiesel. Cocoa bean shell charcoal (Theobroma cacao L) has a K2CO3 content similar to its commercial product, and contains some traces of silicates and sulfates so that it can increase the efficiency of reducing free fatty acids. In this study, tests were carried out to reduce FFA levels in used cooking oil using charcoal from cocoa bean husks activated with HCl, varying the concentrations of 6, 8 and 10 Molar, as well as the temperature treatment during the process of mixing used cooking oil with activated charcoal adsorbent, which was 75 , 100, and 150°C. The best FFA reduction results were found in the A3T2 reactor which reached 80%, where the best HCl concentration was 10 Molar and the temperature of the mixing process with the adsorbent was 100°C and produced a biodiesel yield of 75%. The quality of the biodiesel produced complies with SNI 7182-2015 standards, 867 kg/m3 of density, 0.5 mg KOH/g of acid number, 1.52 cSt of kinematic viscosity, 48.081 MJ/kg of calorivic value and 143.99%- mass of methyl ester content.
Penerapan Energi Surya Sebagai Sumber Energi Penggerak Pompa Air Tanaman Hidroponik NFT (Nutrient Film Technique) Syabriyana, Maliya; Amir, Fazri; Ulma, Zeni; Huda, Muhammad Khorul
Jurnal Teknik Terapan Vol. 2 No. 2 (2023): Oktober
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v2i2.32

Abstract

Energi merupakan kebutuhan vital untuk menunjang kebutuhan hidup yang meliputi sektor industri, transportasi, pertanian dan kebutuhan rumah tangga. Kebutuhan energi yang paling krusial adalah kebutuhan energi listrik dimana setiap kegiatan sehari hari menggunakan energi listrik Pemanfaatan energi terbarukan (renewable energy) dirasa sangat tepat untuk menggantikan penggunaan listrik konvensional, disamping untuk mengurangi pengeluaran biaya listrik, energi terbarukan juga dapat mendukung terciptanya green energy dan mengurangi penggunaan listrik energi fosil yang semakin menipis. Penggunaan energi matahari (solar panel) merupakan pilihan yang tepat dikarenakan penyinaran matahari yang berlangsung antara 7 sampai 8 jam sehari merupakan potensi yang baik. Tujuan dari penelitian ini adalah untuk merancang dan membuat PLTS sebagai sumber energi penggerak pompa pada tanaman hidroponik NFT (Nutrient Film Technique) dan menganalisis energi rata- rata yang dihasilkan dari sistem konversi energi cahaya matahari menjadi listrik pada panel surya untuk sistem hidroponik NFT. Dari hasil perancangan yang telah dilakukan menunjukkan bahwa energi yang dihasilkan panel surya belum mencukupi kebutuhan beban harian. Total energi tertinggi yang dihasilkan panel surya adalah 330,1 W/ hari.
Analysis of biodiesel process from waste cooking oil using heterogeneous catalyst field snail shell (pila ampullacea) Ridho, Ainur Rosyid; Prasetyo, Dafit Ari; Susmiati, Yuana; Ulma, Zeni
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4287

Abstract

Biodiesel is an alternative fuel in the form of Fatty Acid Methyl Ester (FAME) which can be renewed using vegetable oils and animal oils through esterification or transesterification processes. This study used waste cooking oil as a raw material for biodiesel with a CaO catalyst from the shells of field snails (Pila ampullacea) which were calcined for 4 hours at a temperature of 700°C. This experiment aim to study of the effect of temperature (55°C, 60°C, 65°C) and catalyst weight (4%, 6%, 8%), for 2 hours the transesterification process and the molar ratio of oil to methanol was 1:9. Crude Biodiesel from the transesterification process washed using dry washing method with activated coconut shell charcoal which has been activated using 1M H3PO4. Based on this research, the optimum yields about 91,5%-volume, were obtained in A2T2 with temperature 60°C and a catalyst weight of 6% with a biodiesel yield of 91.5%. The characteristics of the biodiesel produced were kinematic viscosity 3.32 cSt, density 863 Kg/m3, acid number 0.543%, iodine number 14.3%-mass, methyl ester content 169.12% and cetane number 43.28%-mass.
Co-Authors Akbar, Ikhwanul Fajri Al Amanda, Ricca Baihaqi, Ihsan Hendrawan Bayu Rudiyanto Cahyaning Nur Karimah, Cahyaning Nur Dewi Agustina Edia Rahayuningsih Fazri Amir Fissa’ Adah, Nadia Fissa’adah, Nadia Heni Pujiastuti Huda, Muhammad Khorul Kharisma Rezkie Pamungkas, Dimas Maulidiyah, Fany Dwi Mubarakah, Fathimah Nabilah Mukasi Wahyu Kurniawati Nur Faizin Nuraini, Anisa nuruddin, mochammad Prasetyo, Dafit Ari Putra, Juan Arkananta Sakti Rahmanto, Dedi Eko Rayhana Sinatria, Balqis Ridho, Ainur Rosyid Rofiqi, Moh. Hajar Rohmadini, Fira Saputra, Rifki Maulana Saputro, Muhammad Rio Aditya Suyata, Arfiansyah Yusuf Zuliardi Syabriyana, Maliya Tutik Dwi Wahyuningsih Yuana Susmiati Yuli Hananto, Yuli Zulfa, Nuriyah