Article Per Year (5 Year)
p-Index From 2021 - 2026
1.235
P-Index
This Author published in this journals
All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) FLUIDA Jurnal Ilmiah Teknik Kimia Jurnal Pengendalian Pencemaran Lingkungan (JPPL) JURNAL ILMIAH PENELITIAN MAHASISWA Pengabdian Cendekia
Rosmawati Sipayung
Universitas Jambi
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Other

Published : 7 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 7 Documents
Search

 1 
Pembuatan Biobriket dari Limbah Daun dan Batang Kayu Putih (Malaleuca leucadendron) Guna Memanfaatkan Limbah Hasil Pertanian di Kecamatan Jeruklegi Kabupaten Cilacap Sonya Hakim Raharjo; Fatiha Nur Etnanta; Rosmawati Sipayung; Ebeng Sugondo; Asmaq Yuliah
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 5 No. 1 (2023): JPPL, Maret 2023
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v5i1.1762

Abstract

Oil reserves are increasingly decreasing in line with the use of non-renewable fossil fuels. One of the renewable energy sources is biomass. Some of the advantages of biomass briquettes are that they are environmentally friendly, more economical, and have better efficiency than coal briquettes. Eucalyptus leaves and stems (M. leucadendron) are the example of the biomass wastes that can be utilized as raw material for briquettes. The objectives of this research are to : Examine the fabrication of biobriquettes from the waste leaves and stems of eucalyptus (M. leucadendron); Examine the effect of the ratio of eucalyptus leaf and stem waste and adhesive on the characteristics of biobriquettes; Examine the effect of carbonization temperature of eucalyptus leaf and stem waste on the characteristics of biobriquettes; and Examine the effect of carbonization time of eucalyptus leaf and stem waste on the characteristics of biobriquettes. The biobriquettes fabrication process starts with the preparation of raw materials (drying), carbonization of biomass with a furnace, mixing raw materials with tapioca flour as adhesive, molding dough, and drying. Variable 6 with leaves and stems ratio is 5:1, with carbonization temperature of 800°C and carbonization time of an hour produces the best biobriquette product of water content 2.21 % and ash content 25.08%.
Utilization of Waste Cooking Oil as Biodiesel for Portable Stoves: Comparison of Homogeneous and Heterogeneous Catalysts Sipayung, Rosmawati; Amalia, Rahma; Ra'ida Raudhatussya'rifah; Rara Ayu Lestary; Widyastuti, Nita; Mundarti, Sri; Nazarudin
JURNAL ILMIAH PENELITIAN MAHASISWA Vol 3 No 1 (2025): Februari
Publisher : Kampus Akademik Publiser

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jipm.v3i`1.734

Abstract

This research investigates the performance comparison between homogeneous (NaOH) and heterogeneous (CaO) catalyst in biodiesel production from waste cooking oil, specifically focusing on their application as fuel for portable stoves. The study examines the effects of catalyst type with NaOH concentrations of 1%, 2%, and 3%, and CaO concentrations of 4% and 6%, along with methanol-to-oil molar ratios (1:6 and 1:12) on biodiesel yield, product color, and flame characteristics. Results show that NaOH catalyst achieved higher yields (92.30%) at 3% concentration with a 1:6 methanol-to-oil ratio, while CaO catalyst reached maximum yields of 42.00% at 6% concentration with a 1:12 ratio. NaOH-catalyzed biodiesel consistently produced clear yellow coloration, whereas CaO-catalyzed biodiesel showed varying clarity depending on process conditions. In portable stove applications, NaOH-catalyzed biodiesel demonstrated superior performance with faster combustion rates (0.0607 ml/second) and blue flames, compared to CaO-catalyzed biodiesel's slower combustion (0.0412 ml/second) and yellowish-red flames.
Pemanfaatan Limbah Ampas Kopi sebagai Adsorben untuk Pengolahan Air Limbah Industri Tahu: Analisis Adsorpsi Batch dan Parameter Isoterm Rara Ayu Lestary; Oki Alfernando; Sarah Fiebrina Heraningsih; Rosmawati Sipayung; Adelia Amanda; Alya Rizki Amelia; Ita Safitri; Septrinawati Tambunan; Tiamsa Sihotang; Karisma Ulfadeli; Tiara Bartisa Putri
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48776

Abstract

Coffee grounds waste can be utilized as a cost-effective and eco-friendly adsorbent for treating wastewater from the tofu industry. Batch adsorption experiments were conducted to evaluate the performance of coffee grounds as an adsorbent in removing pollutants from tofu wastewater. Different adsorbent doses (1 g, 2 g, and 3 g per 200 mL) were tested, and the quality of the wastewater was assessed based on changes in Total Dissolved Solids (TDS), turbidity, conductivity, and pH. The specific adsorption capacity (mg/g) and removal efficiency (%) decreased with increasing adsorbent dose. The overall removal of contaminants was most effective at a 3 g dose, resulting in a 47% reduction in TDS and an 80% decrease in turbidity. Adsorption equilibrium data were further analyzed using Langmuir, Freundlich, and Temkin isotherm models. The Langmuir model showed the best fit (R² = 0.999), indicating monolayer adsorption on a homogeneous surface. These results demonstrate that coffee grounds waste is a promising sustainable adsorbent, particularly for small and medium-scale tofu industries with limited resources for wastewater treatment.
A Project-Based Learning Approach for Chemical Engineering Students Involving Waste Cooking Oil Biodiesel Production for Portable Stove Application Amalia, Rahma; Sipayung, Rosmawati; Nazarudin
Jurnal Penelitian Pendidikan IPA Vol 11 No 6 (2025): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i6.11134

Abstract

This study implemented project-based learning in a bioenergy engineering course at the Pondok Meja Campus, Universitas Jambi, involving 17 chemical engineering students during the first semester of the 2024/2025 academic year. Conducted over 13 weeks, the project involved biodiesel production from waste cooking oil using NaOH and CaO catalysts, followed by fuel application in a portable stove. The highest biodiesel yield was 92.3% (3% NaOH, 1:6 oil-to-methanol) and 42.0% (6% CaO, 1:12). The density ranged from 0.87 to 0.89 g/cm³, with stove fuel consumption rates of 0.0607 ml/s (NaOH) and 0.0412 ml/s (CaO). Evaluation involved class participation, lab performance, product presentation, and final reporting, yielding an overall project score of 87/100. Student feedback showed high agreement (mean 4.45/5) in teamwork, problem solving, critical thinking, time management, and proactiveness, supported by lecturer assessments (13.1/15). Challenges included equipment limitations and time constraints, yet all groups completed the project on time. This hands-on approach effectively achieved subject-specific and transferable skills, fostering engineering competence and readiness for real-world bioenergy challenges.
Sosialisasi Aplikasi Penggunaan Pupuk Kompos: Strategi Meningkatkan Kesuburan Tanah di Kota Jambi Suryadri, Hadistya; Prabasari, Ira Galih; Heraningsih, Sarah Fiebrina; Alfernando, Oki; Mundarti, Sri; Sipayung, Rosmawati; Widyastuti, Nita; Lestary, Rara Ayu; Raudhatussya'rifah, Ra'ida; Herlambang, Aldillah; Amalia, Rahma
Pengabdian Cendekia Vol. 3 No. 1 (2025): Vol. 3 No 1 (Juni 2025) Membangun Kecendekian: Transformasi Melalui Pengabdian
Publisher : Indonesian Scholars Global Forum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63107/pk8kcp98

Abstract

Kesuburan tanah yang menurun akibat penggunaan pupuk kimia secara berlebihan menjadi tantangan serius bagi petani di RT 10 dan 11 Kelurahan Tahtul Yaman, Kecamatan Pelayangan, Kota Jambi. Padahal, wilayah ini memiliki potensi besar berupa limbah organik rumah tangga dan limbah pertanian yang belum dimanfaatkan secara optimal sebagai bahan baku pupuk kompos. Urgensi kegiatan ini terletak pada perlunya solusi berkelanjutan yang ramah lingkungan dan ekonomis dalam pengelolaan kesuburan tanah. Tujuan dari kegiatan pengabdian ini adalah meningkatkan pengetahuan dan keterampilan masyarakat mengenai pembuatan serta pemanfaatan pupuk kompos sebagai alternatif pengganti pupuk kimia. Metode yang digunakan mencakup survei lapangan, sosialisasi materi, praktik langsung pembuatan pupuk kompos, dan diskusi partisipatif, yang dilaksanakan pada 19 Agustus 2024 dan melibatkan 20 warga. Hasil kegiatan menunjukkan peningkatan signifikan dalam pemahaman masyarakat tentang manfaat dan teknik pembuatan pupuk kompos, serta terbentuknya kelompok kerja lokal sebagai bentuk keberlanjutan program. Selain itu, kegiatan ini dapat menunjukkan bahwa edukasi teknis yang terintegrasi dengan praktik langsung dan pendekatan partisipatif mampu memberdayakan masyarakat dalam mengelola limbah organik dan meningkatkan kesuburan tanah secara berkelanjutan.
Utilization of Agricultural Waste from Brebeg Cilacap Village Become Biogas Using Cow Manure Sipayung, Rosmawati; Raharjo, Sonya H.; Sugondo, Ebeng; Aprilia, Anisa
Fluida Vol. 16 No. 1 (2023): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4697

Abstract

Straw is one of the most prevalent agricultural wastes in Indonesia, particularly in Cilacap Regency. One hectare of rice fields can yield 7–10 tons of dried straw every growing season. In addition, cow dung in Brebeg Village has not been utilized optimally. Cow dung and straw can be utilized as an alternative energy, one of which is biogas. Biogas is produced through anaerobic fermentation in a biodigester. Methanogenic bacteria first convert straw and cow manure in the biodigester into gas, which is subsequently produced as a high concentration of methane. This technology can be easily applied especially for farmers and ranchers. These experiments were carried out by varying the ratio of cow dung, straw, distilled water, and the percentage of EM-4 bacteria with fermentation for 30 days in each variation. Based on the result, it is known that factors affecting biogas production are ratio of substrate, temperature, pH, and microorganisms. The best biogas is produced with a cow dung, straw, and distilled water ratio of 8:1:2 and 10% EM-4 bacteria with a flash time of 71-seconds and a blue flame. Although a particular sort of plastic is used in this laboratory-scale investigation to make it more efficient, it is prone to leaking. It is advised to use a fixed dome style of storage while scaling up the digester
Transformation of Agricultural Waste into Silica–Cellulose Microsponge Adsorbent for Optimization of Waste Cooking Oil as Biodiesel Feedstock Sipayung, Rosmawati; Rahma Amalia; Rara Ayu Lestary; Nita Widyastuti; Oki Alfernando; Ira Galih Prabasari; Nazarudin; Putri Ananda; Intan Nandia Sakti
Jurnal Ilmiah Teknik Kimia Vol. 10 No. 1 (2026): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v10i1.54342

Abstract

The utilization of used cooking oil as a biodiesel feedstock is hindered by its high free fatty acid (FFA) content, which interferes with the transesterification process. This study aims to reduce FFA levels through adsorption using a silica–cellulose-based microsponge adsorbent synthesized from rice husk ash and corn cob waste. The investigated process variables include adsorbent mass (1, 3, 5 g), temperature (30, 45, 60 °C), contact time (30, 60, 90 minutes), and silica-to-cellulose ratios (40:60, 50:50, 60:40). FTIR analysis revealed characteristic peaks of Si–O–Si (~1053 cm⁻¹) and Si–O (~795 cm⁻¹) indicating the presence of amorphous silica, while the O–H stretching (~3200–3500 cm⁻¹) of cellulose appeared weaker due to silica dominance on the surface. This confirms the successful formation of the silica–cellulose composite with strong chemical interaction. Furthermore, Brunauer–Emmett–Teller (BET) analysis showed a specific surface area of 87.77 m²/g with mesoporous characteristics, confirming the microsponge structure with high affinity toward polar molecules such as FFA. The optimum conditions were obtained at 5 g adsorbent mass, 30 °C, 60 minutes contact time, and a 60:40 silica-to-cellulose ratio, achieving an FFA reduction efficiency of 49.62%. These physicochemical properties make the adsorbent efficient, energy-saving, and environmentally friendly, highlighting the great potential of agricultural waste transformation into active materials for pre-purification of used cooking oil toward sustainable biodiesel production.
Co-Authors Adelia Amanda Aldillah Herlambang Alfernando, Oki Alya Rizki Amelia Amalia, Rahma Anisa Aprilia Asmaq Yuliah Fatiha Nur Etnanta Intan Nandia Sakti Ira Galih Prabasari Ita Safitri Karisma Ulfadeli Lestary, Rara Ayu Mundarti, Sri Nazarudin Nita Widyastuti Oki Alfernando Prabasari, Ira Galih Putri Ananda Ra'ida Raudhatussya'rifah Raharjo, Sonya H. Rahma Amalia Rara Ayu Lestary Raudhatussya'rifah, Ra'ida Sarah Fiebrina Heraningsih Septrinawati Tambunan Sonya Hakim Raharjo Sugondo, Ebeng Suryadri, Hadistya Tiamsa Sihotang Tiara Bartisa Putri Widyastuti, Nita