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All Journal KOVALEN: Jurnal Riset Kimia FLUIDA Jurnal Pengendalian Pencemaran Lingkungan (JPPL) International Journal of Applied Technology Research Jurnal Difusi Journal Serambi Engineering (JSE) Journal of Green Science and Technology
Trirahayu, Dhyna Analyes
Department Of Chemical Engineering, Politeknik Negeri Bandung
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Pemanfaatan Limbah Puntung Rokok sebagai Inhibitor Korosi pada Baja St40 Menggunakan Metode Microwave Assisted Extraction (MAE) di Lingkungan NaCl 3,56%: Utilization of Cigarette Butts Waste as Corrosion Inhibitor on St40 Steel Using Microwave Assisted Extraction (MAE) Method in 3.56% NaCl Environment Alatif, Ikhsan Akmal; Permatasari, Rahma Puspa; Nurulgina, Rahma; Adzkia, Zahrotul Filza; Andayani, Puri; Putri, Sabrina Aisyah; Adinda; Trirahayu, Dhyna Analyes; Hadiningrum, Kunlestiowati
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17394

Abstract

Corrosion is a problem that occurs in many industries and causes large losses. The use of corrosion inhibitors is one way to reduce or inhibit corrosion. Cigarette butt waste extract can be utilized as an organic corrosion inhibitor. This study aims to determine the yield of cigarette butt waste extract, the content of cigarette butt waste extract produced using the MAE method qualitatively, determine the optimum conditions for the extraction process with the MAE method based on variations in microwave power of 150 and 300 watts and calculate the efficiency of corrosion inhibitors and the effect of compounds contained in cigarette butt waste extract in 3.56% NaCl environment. The optimum MAE condition was 150 watts and 15 minutes, with an extract yield of 54.38%. Based on the GC-MS test, it is known that cigarette butts waste extract contains alkaloid, terpenoid, and phenol compounds as corrosion inhibitor compounds. Based on corrosion inhibitor testing, the addition of cigarette butt waste extract corrosion inhibitors can suppress or reduce the corrosion rate that occurs on metals with an inhibitor efficiency of 79.19% in non-aerated conditions and 71.53% in aeration with an inhibitor concentration of 1000 ppm in a 3.56% NaCl environment.
Efektivitas Limbah Puntung Rokok sebagai Inhibitor Korosi dalam Medium Asam Klorida pada Baja A36 dengan Metode Microwave Assisted Extraction: Effectiveness of Cigarette Butts Waste as Corrosion Inhibitor in Hydrochloric Acid Medium on A36 Steel by Microwave Assisted Extraction Method Alatif, Ikhsan Akmal; Permatasari, Rahma Puspa; -, Maya Futri Nur Rachmat; Wulandari, Dwi Arsya; Sonia, Gina; Aura, Azma Addina; Trirahayu, Dhyna Analyes; Hadiningrum, Kunlestiowati
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17395

Abstract

Cigarette butts are one of the wastes found in many places, and their presence can damage the environment. One way to reduce the amount of cigarette butts waste is to process them into corrosion inhibitors. This study aims to extract tobacco from cigarette butts using 96% ethanol solvent by varying the extraction time for 5, 10, 15, and 20 minutes, and microwave power of 150 watts and 300 watts, and calculating the efficiency of corrosion inhibitors in acidic environments. The extraction method used was Microwave Assisted Extraction (MAE). From the extraction process, it is known that the optimum extraction power of 150 watts in 15 minutes produces the highest yield of 64.52%. Based on phytochemical and GC-MS tests, it is known that cigarette butt extract contains antioxidant compounds in the form of alkaloids, pyranones, and terpenoids as corrosion inhibitor compounds. Based on corrosion testing, it is proven that the addition of cigarette butt waste extract corrosion inhibitors can suppress or reduce the corrosion rate that occurs on metals with the most excellent efficiency of 82.26% with an extract concentration of 2000 ppm. And the SEM-EDX test results concluded that the corrosion inhibitor from cigarette butts waste extract can withstand the formation of rust on the metal.
PELATIHAN DAN PEMBUATAN MATERI UJI KOMPETENSI (MUK) SKEMA PENANGGUNG JAWAB PENGOPERASIAN PENGOLAHAN AIR LIMBAH (POPAL) Hidayatulloh, Irwan; Budiastuti, Herawati; Soeswanto, Bambang; Kusumawati, Endang; Trirahayu, Dhyna Analyes; Paramitha, Tifa; Ramadhani, Laily lsna; Elizabeth, Lidya
Jurnal Difusi Vol. 7 No. 2 (2024): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/difusi.v7i2.5561

Abstract

Ada 5 (lima) unit kompetensi dari draft skema okupasi Penanggung Jawab Pengoperasian Pengolahan Air Limbah (POPAL) yang sedang dibuat dan sekaligus akan diberikan dalam pelatihan bagi guru-guru SMK Negeri 7 Bandung oleh dosen-dosen Teknik Kimia, Politeknik Negeri Bandung. Unit kompetensi yang dimaksud yakni Mengoperasikan Instalasi Pengolahan Air Limbah (IPAL), Menilai Tingkat Pencemaran Air Limbah, Melakukan Perawatan IPAL, Mengidentifikasi Bahaya Pengolahan Air Limbah, dan Melakukan Tindakan Keselamatan Kerja terhadap Bahaya dalam IPAL. Dengan demikian para asesor di kedua institusi pendidikan ini dapat memiliki kompetensi dalam membuat MUK dimana MUK menjadi persyaratan wajib dalam pengusulkan draft skema yang akan diajukan untuk dilisensi oleh Badan Nasional Sertifikasi Profesi (BNSP) Indonesia. Hingga saat ini, terdapat beberapa kegiatan yang telah dilaksanakan. Pertama, koordinasi dan pertemuan telah dilakukan dengan pihak mitra untuk sinkronisasi pelaksanaan kegiatan. Kedua, koordinasi internal tim PkM untuk membahas pembagian tugas, rencana pembuatan MUK, dan rencana pelaksanaan pelatihan bagi para peserta pelatihan. Ketiga, merupakan pelaksanaan pelatihan mengenai pembuatan MUK unit kompetensi 1 dan 2. Keempat, merupakan lanjutan pelakasanaan kegiatan pelatihan mengenai pembuatan MUK untuk unit kompetensi 3, 4 dan 5.
Enhancing Hard Anodization ff Aluminum 1100 using Variated Concentration and Aeration in 20% Sulfuric and Phosphoric Acid Electrolytes Leoanggraini, Unung; Yusuf, Yusmardhany; Nugraha, Ganjar; Samuel, Samuel; Sarip, Fahmi Haddad; Trirahayu, Dhyna Analyes; Sihombing, Rony
Journal of Green Science and Technology Vol 8 No 2 (2024): Journal of Green Science and Technology Vol.8 No.2 September 2024
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v8i2.9424

Abstract

Aluminum is widely used in manufacturing, especially in automotive and aerospace, due to its light weight and easy form, although it is worn. The purpose of this research is to get the highest layer formation efficiency. During the application, hard anodizing creates a new layer in the form of a anatural protective layer on the metal surface. In hard anodized aluminum, the specimen sanded, degreasing with base, and acid neutralization. Then, hard anodizing is performed by connecting the workpiece to the positive pole and the cathode to the negative pole with a current density of 3A/dm² for 30 minutes in an electrolyte solution at a temperature of 5°C. The variations used are the mixture composition between sulfuric acid (concentration 15% - 20%) and low concentration phosphoric acid (0%, 1%, 2%, 3%, 4%, 5%) which are differentiated into aerated and non-aerated systems. Then weigh the anodized work piece to determine the weight gain of the metal due to the formed layer. The weight of the obtained layer is used to determine the efficiency of the formation of oxide layer.  The best layer formation efficiency is found in the sulfuric acid - phosphoric acid concentration variation (15% - 1%) in the aerated system at 73.47%. While the non aerated system at 73.28%. The aerated condition shows superior results compared to the non-aerated system, yielding better efficiency values than the non-aerated system.  Keywords: Aluminum 1100, Hard Anodizing, Mechanical Properties, Aeration, Electrolyte
Sintesis Biodiesel dari Limbah Biji Alpukat melalui Proses Esterifikasi dan Transesterifikasi Budiastuti, Herawati; Rahmawati, Aisyah Auliya; Susanto, Susy Mardiana; Trirahayu, Dhyna Analyes; Rusdianasari, Rusdianasari
Fluida Vol. 16 No. sp1 (2023): FLUIDA x IRWNS Special Edition
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16isp1.5342

Abstract

The avocado seed is a food waste that contains vegetable oil. The amount of avocado seed waste is very abundant, but there is no optimal processing or utilization. Fossil fuels as an energy source can experience scarcity because these energy sources are non-renewable. This research has important implications in waste management and development of renewable energy sources. One type of renewable energy is biodiesel. Biodiesel is an environmentally friendly alternative fuel made from vegetable oil. The use of biodiesel as an alternative fuel has advantages including being easier to decompose in nature and reducing emissions when compared to diesel oil. One type of plant that can be used as raw material for making biodiesel is avocado. This study aims to utilize avocado seed waste as a raw material for biodiesel synthesis and to test its characteristics that have not been found in previous studies in the form of analysis of acid value, density, and oxidation stability. The method used in the synthesis of biodiesel was esterification and transesterification reactions using methanol solvent with a mole ratio of avocado seeds to methanol of 1:6 and the addition of H2SO4 catalyst as much as 0.5% of the weight of oil for the esterification process and the addition of NaOH catalyst as much as 1% of the weight of oil for the transesterification process. This study complements previous research on biodiesel from avocado seeds and compares the obtained biodiesel characteristics to the Indonesian National Standard (SNI) 04-7182:2015. The final results of this study were 34,61%, 0.98 mg-KOH/g, 977 kg/m3, and 318 minutes for biodiesel yield, acid value, density, and oxidation stability, respectively.
Design Of a Feeding System with a Capacity Of 3 Tons/Hour at the Npk Plant to Improve Feeding Efficiency and Automation Tsuroyyaa, Zakiyyah; Christianti, Christianti; Trirahayu, Dhyna Analyes; Chamidy, Harita Nurwahyu
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10549

Abstract

An NPK plant is a facility that produces NPK fertilizer through a manufacturing process specifically designed to create fertilizer with a special formulation. However, in the production process, the feeding of raw materials is still done manually, resulting in low productivity and high operational costs. Based on production performance tests conducted on September 15, 2024, the manual system only achieved an average of 1.34 tons/hour, or 47% of the production target of 3 tons/hour. Therefore, a transportation system is needed to transport the materials, given the limitations of human labor capacity in terms of material handling and employee safety. This study aims to design an automatic feeding system to maximize production capacity up to 3 tons per hour. The system design begins with analyzing losses due to low productivity of the manual system, analyzing factory requirements, designing the main components of the feeding system, such as the hopper, weigher, and conveyor belt, equipped with an on-off control-based system to ensure consistent raw material flow. Technical design was carried out through visualization using AutoCAD and Visio software, solid flow simulation using Altair EDEM software, and economic feasibility analysis by calculating the Return on Investment (ROI) and Payback Period (POT). The calculation results show that this feeding system has a ROI of 40.8% and a POT of 2.05 years, indicating that the designed system is economically viable for implementation.
Co-Authors -, Maya Futri Nur Rachmat Achmad Syarif Hidayat Adinda Adzkia, Zahrotul Filza Akhmad Zainal Abidin Akhmad Zainal Abidin, Akhmad Zainal Alatif, Ikhsan Akmal Alifa Dewi Kirana Andayani, Puri Aura, Azma Addina Bambang Soeswanto Budi Santoso Chamidy, Harita Nurwahyu Christianti, Christianti Elizabeth, Lidya Endang Kusumawati Erwina Safitri Fauzian Ichsan Ghinaa Annisa Khairani Hadiningrum, Kunlestiowati Herawati Budastuti Herawati Budiastuti Hidayat, Achmad Syarif Hidayatulloh, Irwan Joshua Mulia Nababan Keryanti, Keryanti Khairul Hadi Burhan Mubiar Purwasasmita Muhammad Iqbal Perdana Nugraha, Ganjar Nurcahyo Nurulgina, Rahma Paramitha, Tifa Perdana, Muhammad Iqbal Permatasari, Rahma Puspa Putra, Ridwan P. Putri, Sabrina Aisyah Rahmawati, Aisyah Auliya Ramadhani, Laily Isna Ramadhani, Laily lsna Ridwan P. Putra Ridwan P. Putra Ridwan P. Putra Rusdianasari Rusdianasari Samuel Samuel Sarip, Fahmi Haddad Sihombing, Rony Sonia, Gina Susanto, Susy Mardiana Tsuroyyaa, Zakiyyah Unung Leoanggraini Wulandari, Dwi Arsya Yusuf, Yusmardhany