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All Journal Sinergi Journal of Engineering and Technological Sciences KOVALEN: Jurnal Riset Kimia EMITTER International Journal of Engineering Technology Jurnal Teknik Mesin IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) FLUIDA Jurnal Inovasi Teknik Kimia Jurnal Daur Lingkungan Jurnal Surya Teknika AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Teknologi International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Journal of Renewable Energy, Electrical, and Computer Engineering Tropical Plantation Journal Proceeding ISETH (International Summit on Science, Technology, and Humanity) International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)

Rusdianasari Rusdianasari

Department of Renewable Energy Engineering, Politeknik Negeri Sriwijaya, Palembang

Author-ID : 365972

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Use of Base Catalysts in Making Biodiesel from Waste Cooking Oil Syafitri, Dwi; Putri Arza, Tasya Dwi Putri Arza; Rusdianasari, Rusdianasari
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 1 (2025)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v9i1.611

Biodiesel obtained from vegetable oils and animal fats, is a more environmentally friendly alternative to conventional fossil fuels. Biodiesel production through esterification and transesterification processes with an emphasis on the role of catalysts in increasing efficiency. The use of homogeneous and heterogeneous catalysts, as well as the advantages and disadvantages of each. Homogeneous catalysts, such as NaOH and KOH, are effective in increasing the reaction, but face challenges in product separation and soap formation that can reduce biodiesel yields. In contrast, heterogeneous catalysts such as CaO and zeolites offer advantages in terms of reuse and waste reduction, although with slightly lower efficiency. In addition, important factors such as catalyst concentration, alcohol to oil ratio, and reaction temperature are also reviewed to maximize biodiesel yields. Optimal catalyst concentration is essential to increase conversion efficiency, as inappropriate concentrations can slow down the reaction. The importance of choosing the right catalyst and process conditions in producing biodiesel efficiently, while considering the environmental impact of using raw materials, especially palm oilContribution to Sustainable Development Goals (SDGs):SDG 6: Clean Water and SanitationSDG 11: Sustainable Cities and CommunitiesSDG 13: Climate ActionSDG 15: Life on Land

Production of Biodiesel from Sunflower Oil using Base Catalysts Kinia Eldwita; Vivi Octhaviana; Rusdianasari
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 1 (2025)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v9i1.643

The reduction of petroleum reserves is a severe problem faced by many countries. With the help of the rapid development of science and technology, vegetable oil can not only be consumed but can also be processed into something that has more value, one of which is biodiesel. Biodiesel is a clean renewable fuel and can be used as the best substitute for diesel fuel. The purpose of this study is to provide a comprehensive overview of the development of research related to the production of biodiesel from sunflower oil using base catalysts. This research was conducted using the transesterification reaction method with the help of catalysts. Then the biodiesel yield from sunflower oil can be influenced by several factors, including the amount of catalyst, reaction temperature, reaction time, stirring speed, and molar ratio between methanol and oil. Based on the research, several tests were carried out. The first test was based on the influence of stirring speed, the results showed that the faster the stirring, the more biodiesel yield. The second test was based on the effect of reaction time; the results indicated that the reaction time could not significantly increase the biodiesel yield. The third test was based on the effect of the molar ratio of methanol and oil, the results showed that the optimum ratio could help drive the transesterification reaction towards the product. The fourth test looked at how the concentration of KOH solution affects the amount of biodiesel produced; the results showed that using the best amount of catalyst can make the transesterification reaction work better. The fifth test was based on the effect of reaction temperature; the results showed that at high temperatures (60°C) methanol mixes more easily with oil so that the biodiesel formation reaction takes place faster. From the results of this study, it can be concluded that sunflower oil can be used as one of the ingredients in making biodiesel.Contribution to Sustainable Development Goals (SDGs):SDG 7: Affordable and Clean EnergySDG 9: Industry, Innovation, and InfrastructureSDG 12: Responsible Consumption and ProductionSDG 13: Climate Action

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

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.

Condenser Design on Plastic Oil Distillation Equipment Novarini, N; Kurniawan, Sigit; Rusdianasari, R; Bow, Yohandri; Rifa'i, Ahmad Imam
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2020: Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

The pyrolysis method is a technology in energy conversion that can be applied in processing plastic waste into alternative fuels in liquid form. The pyrolysis method begins with heating the plastic waste in the reactor at a temperature of more than 400°C so that the thermal degradation process of the material occurs without oxygen content, causing a phase change to the vapor phase. The vapor phase is cooled into the condenser to convert it into a liquid phase to obtain liquid fuel from plastic waste. In this study, the pyrolysis condenser design in changing the vapor phase from the reactor to the liquid phase was designed using water as a coolant on the annular side with a coolant inlet temperature of 25 ° C and a coolant outlet temperature of 35°C. The results showed that an annular side dimension with a diameter of 250 mm and a height of 250 mm was needed to reduce the temperature of the inlet condenser fuel vapor from 60°C to 30°C. Furthermore, the inner pipe of the condenser is made of copper material, which is formed by a spiral with a spiral diameter of 250 mm, an inner diameter of 25 mm, and a tubing length of 4,870 mm.

Antibacterial Activity and Preliminary Phytochemical Screening of Forest Chili Leaf (Piper caninum Bl.) Ethanol Extract against Staphylococcus epidermidis Shanzet, Flavia Fionessa Falenda; Darmayasa, Ida Bagus Gede; Suriani, Ni Luh; Wiadnyani, Anak Agung Istri Sri; Ho, Ting Seng; Rusdianasari, Rusdianasari; Mariani, Mariani
Tropical Plantation Journal Vol 3, No 1 (2024): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v3i1.34

Forest chili leaves (Piper caninumÂ Bl.) has a potential to become an alternative to conventional antibiotics. This study aims to determine the Minimum Inhibitory Concentration (MIC) of forest chili leaf extract, assess the Lethal Concentration (LC50), and analyze the phytochemical composition of the extract. This study also conducted a Completely Randomized Design (CRD) with four repetitions. The agar well diffusion method is used in this study with various concentrations such as T1 ethanol 96% (negative control), T2 (5% concentration), T3 (10% concentration), T4 (15% concentration), T5 (20% concentration), T6 (25% concentration), and T7 Ciprofloxacin 1% (positive control). Data were subjected to ANOVA at a significance level of 5% and further analyzed using Duncan's test. The results showed that all concentrations of forest chili leaf extract (P. caninumÂ Bl.) exerted a statistically significant effect (P 0.05) againstÂ Staphylococcus epidermidisÂ bacteria. The research found that the most effective concentration to inhibitsÂ S. epidermidisÂ is at 25%, which generates an inhibitory zone of 25.38 Â± 0.52 mm. The estimated MIC value for forest chili leaf extract againstÂ S. epidermidisÂ was found to be 0.2%, producing an inhibitory zone of 6.38 Â± 0.32 mm. Additionally, the calculated LC50 value was 0.26%. Phytochemical screening revealed the presence of various bioactive compound groups in the forest chili leaf extract, including alkaloids, flavonoids, phenols, tannins, and steroids.

The Potential of Rice Husk Biopellets as a Substitute Fuel Rusdianasari, Rusdianasari; Kalsum, Leila; Hasan, Abu; Syaritri, Dwi; Arza, Tasya Dwi Putri; Octhaviana, Vivi; Nor, Siti Najdah Binti Mohd; Jamil, Maizun Binti; Risdzuan, Aiman Arif Bin
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 3 (2025)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v9i3.844

One of Indonesia's greatest waste crops, rice husk, has not yet been fully exploited. Rice husk has a high lignocellulose content, increasing its potential as a renewable energy source, particularly in the form of biopellets. The procedure of creating biopellets is the focus of this study. biopellets made from rice husk and evaluate their quality using proximal, ultimate, value, density, and heat criteria. The study's stages include drying the raw material, milling it to a uniform size, using a pellet mill for pelletisation, and testing the biopellets for quality in compliance with SNI 8951:2020. The study's findings revealed that rice husk biopellets have sufficient calories and low water content after undergoing optimal drying. However, the high relative ash content is the main problem in using it as a feedstock for co-firing, necessitating quality enhancement through chemical treatment or blending with other biomass. Overall, biopellets derived from rice husks have the potential to serve as an environmentally acceptable and cost-effective alternative energy source for household and industrial use. Contribution to Sustainable Development Goals (SDGs): SDG 11: Sustainable Cities and Communities SDG 13: Climate ActionSDG 15: Life on Land

Pemanfaatan Jeruk (Citrus Sinensis) dengan Penambahan Natrium Karbonat (Na₂CO₃) untuk Pembuatan Bio-Baterai Bramantio, Iqbal; Rusdianasari, Rusdianasari; Aziz Pramito, Akbar Ismi
Jurnal Teknologi Vol 25, No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i3.7811

The increasing demand for electrical energy due to population growth, urbanization, and technological development requires alternative solutions that are environmentally friendly and sustainable. Conventional batteries generally contain hazardous heavy metals, thus encouraging the development of bio-batteries using natural materials. This study aims to utilize orange (Citrus sinensis) juice as an electrolyte in the fabrication of bio-batteries and to investigate the effect of sodium carbonate (Na₂CO₃) addition on their electrochemical performance. The research was conducted experimentally by preparing electrolyte solutions consisting of orange juice with variations in volume (200–400 mL) and Na₂CO₃ concentration (0.5; 1; and 2 M). Electrodes used were copper (Cu) as cathode and aluminum (Al) as anode, arranged in series within a BioChamber. Parameters measured included pH 5, voltage, current, power, conductivity, and LED lighting duration. The results show that the optimum condition was obtained at 200 mL of orange juice with 0.5 M Na₂CO₃, producing a voltage of 6.45 V, a current of 30.89 mA, a power of 199.24 mW, and LED lighting duration of approximately 356 minutes. Increasing the Na₂CO₃ concentration to 1 M and 2 M decreased the performance due to the excessive alkalinity of the solution. This study demonstrates that orange juice combined with Na₂CO₃ has significant potential as an alternative, environmentally friendly energy source for the development of green energy technologies.

COMPARATIVE REVIEW OF VARIOUS ORGANIC WASTES DERIVED FROM ANIMALS AND PLANTS IN ANAEROBIC DIGESTION FOR BIOGAS PRODUCTION Febrianti, Helena -; Pendawa, Fajar; Hanitama, Muhammad Rivaldo; Rusdianasari, Rusdianasari
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 15, No 01 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v15i01.37434

Abstract--Increased production of organic waste from the livestock, agriculture, urban, and agro-industrial sectors poses significant environmental challenges if not managed properly. Anaerobic digestion (AD) is an effective technology for processing organic waste while producing renewable energy in the form of biogas. However, the performance of the AD process is greatly influenced by substrate characteristics, such as the carbon to nitrogen (C/N) ratio, lignocellulose content, nitrogen content, and chemical conditions of the substrate. This article aims to conduct a comparative review of various types of animal and plant-based organic waste used in biogas production through the AD process, with an emphasis on methane potential, operational constraints, and process optimization strategies. The method used is a narrative literature review of national and international journal articles discussing the utilization of livestock manure (cattle, chicken, pigs, and goats), food waste, lignocellulosic biomass (rice straw, water hyacinth, and grass), and agro-industrial liquid waste (tofu liquid waste and Palm Oil Mill Effluent/POME). The results of the study show that cow manure has good process stability but relatively moderate methane yield, while chicken and pig manure have higher methane potential but are susceptible to ammonia inhibition. Plant-based and agro-industrial waste generally has high energy potential, but faces obstacles in the form of slow hydrolysis, acidic pH, and nutrient imbalance. Based on the results of the study, anaerobic co-digestion (ACoD) has been proven to be the most effective strategy for optimizing biogas production. This approach is able to balance the C/N ratio, increase buffer capacity, reduce inhibition effects, and improve microbiological stability. The combination of substrates that produces a mixed C/N ratio in the optimal range of 20–30 has been consistently reported to increase methane yield and AD process stability. Thus, substrate selection and formulation through co-digestion are key to developing an efficient and sustainable biogas system.

UJI KINERJA KOMPOSIT BENTONIT-KARBON AKTIF KULIT DURIAN SEBAGAI ADSORPSI LOGAM BESI (Fe) DALAM LIMBAH TEKSTIL JUMPUTAN Reska, Tiara; Rusdianasari, Rusdianasari; Zaman, Muhammad
Jurnal Inovasi Teknik Kimia Vol. 10 No. 3 (2025): July | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v10i3.14828

Kandungan logam besi (Fe) yang terdapat dalam limbah tekstil jumputan dapat menimbulkan pencemaran lingkungan di sekitar industri. Salah satu metode untuk mengurangi kandungan logam besi (Fe) dalam limbah tekstil jumputan yaitu melalui proses adsorpsi. Kulit durian mengandung selulosa yang tinggi yaitu 50-60%, lignin dan pati masing-masing 5% yang berpotensi dapat dijadikan bahan baku untuk pembuatan karbon aktif. Pembuatan karbon aktif ini dapat dikombinasikan dengan bentonit. Bentonit merupakan adsorben yang dapat digunakan karena banyak mengandung monmorillonite dan kemampuan mengembang. Tujuan dari penelitian ini yaitu menentukan kemampuan efisiensi adsorben dan kapasitas adsorpsi maksimum komposit bentonit-karbon aktif kulit durian serta menentukan model isoterm yang digunakan. Penelitian ini menggunakan metode adsorpsi dengan variasi aktivaktor konsentrasi KOH 2M, 3M dan 4M dan variasi waktu pengontakan 10, 20, 30 dan 40 menit selanjutnya dilakukan analisa konsentrasi logam besi (Fe) menggunakan alat spektofotometri serapan atom (AAS). Didapatkan hasil yakni bahwa aktivator konsentrasi KOH 3M dengan waktu optimum pengontakan 40 menit didapat nilai efisiensi adsorpsi sebesar 94,96% dan kapasitas adsorpsi maksimum sebesar 3,30 mg/g, serta penentuan model isoterm adsorpsi mengikuti model isoterm langmuir dikarenakan memiliki nilai R2 yang mendekati 1, yakni dengan nilai yang didapat sebesar 0.9954.

Kajian Komprehensif Variasi Bentuk Blade Turbin Angin: Analisis Aerodinamika, Biomimetik, dan Efisiensi Energi Adjie Pangestu, Wahyu; Minora, Padmarani; Rusdianasari, Rusdianasari
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10569

Pengembangan turbin angin modern sangat bergantung pada optimasi desain bilah (blade) untuk memaksimalkan konversi energi kinetik angin menjadi energi mekanik dan listrik. Variasi bentuk blade termasuk modifikasi biomimetik seperti leading-edge tubercles dan trailing-edge serrations, penggunaan winglet pada ujung bilah, desain helical pada turbin sumbu vertikal (VAWT), serta perubahan geometri airfoil dan geometri Savonius merupakan fokus riset utama untuk meningkatkan koefisien daya (Cp), torsi awal, stabilitas aliran, dan pengurangan kebisingan. Artikel ini meninjau 24 jurnal nasional dan internasional dan menganalisis dampak variasi bentuk blade terhadap performa turbin angin. Hasil tinjauan menunjukkan bahwa modifikasi yang diinspirasi oleh alam (biomimetik) dapat secara konsisten meningkatkan efisiensi aerodinamis dan mengurangi gangguan aliran, sementara desain helical dan Savonius yang dioptimalkan sangat cocok untuk kondisi kecepatan angin rendah. Kajian ini menegaskan pentingnya inovasi geometri blade sebagai jalur strategis dalam pengembangan turbin angin yang lebih efisien dan adaptif ke berbagai kondisi lingkungan.

Co-Authors ABDUL ROHMAN Abdul Rohman Abu Hasan Adjie Pangestu, Wahyu Agustin, Delliana Ahmad Fudholi Ahmad Taqwa Aida Syarif AIDA SYARIF Amalia, Kania Yusriani Amanah, Tria Rizki Anak Agung Istri Sri Wiadnyani Arissetyadhi, Iwan Arza, Tasya Dwi Putri Aziz Pramito, Akbar Ismi Azzahra, Keyla Bambang, Muhammad Refo Barena, Meiwa Bow, Yohandi Bramantio, Iqbal Dewi, Tresna Faroja, Anas Fatahul Arifin, Fatahul Febrianti, Helena - Firdaus, Suryadhi Firdiansyah Hanitama, Muhammad Rivaldo Harahap, Muhammad Rayyan Herawati Budiastuti Hilwatullisan Ho, Ting Seng Husaini, A Ida Bagus Gede Darmayasa Idha Silviyati Indah Purnamasari Indrayani Jaksen M.A Jamil, Maizun Binti Kalsum, Leila Kania Pusriani Amalia Kinia Eldwita Leila Kalsum Mariani Mariani Minora, Padmarani Muhammad Yerizam Mujiyanti, Apri Nainggolan, Hetty S Nasyta, Nabila Putri Ni Luh Suriani Nor, Siti Najdah Binti Mohd Novarini, N Octhaviana, Vivi Paramitha, Tifa Pendawa, Fajar Pola Risma Putra, Asri Eka Putri Arza, Tasya Dwi Putri Arza Rachmawati, Anissa Nurul Rahmawati, Aisyah Auliya RD Kusumanto Reska, Tiara Rifa'i, Ahmad Imam Risdzuan, Aiman Arif Bin Rizka Amalia Robert Junaidi Ronaldo Sakuraba, Takahiro Saputra, Yureski Belly Sardewi, Tri Sari, Desti Erwita Sari, Febby Fitria Sasmanto, Andri Agus Shanzet, Flavia Fionessa Falenda Sigit Kurniawan Siswanto Susanto, Susy Mardiana Suyadi, M. Ilham Andri Syafitri, Dwi Syahrian, Nur Mutiara Syakdani, Adi Syalsabila, Jihan Syaritri, Dwi Taqwa, Ahamad Tresna Dewi Trirahayu, Dhyna Analyes Vivi Octhaviana Yohandri Bow Yordan Hasan Yunsari, Sandhy Yurni Oktarina Zaman, Muhammad Zhafarina, Imas Ning

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