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All Journal Indonesian Journal of Chemical Science Chemical Engineering Journal Storage (CEJS) Jurnal Pengabdian Masyarakat dan Riset Pendidikan Serambi Engineering
Anerasari Meidinariasty
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Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Other

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Effect of Alkaline Catalyst Concentrations and Weight Ratios of Oil to Methanol on the Biodiesel Production From Waste Cooking Oil Anggi Dwi Chandrika; Muhammad Yerizam; Anerasari Meidinariasty
Indonesian Journal of Chemical Science Vol 12 No 3 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v12i3.72542

Abstract

The effect of alkaline catalyst and raw material ratio for the transesterification reaction of used cooking oil that has been previously processed has been investigated. The research was conducted by reacting the waste cooking oil with methoxy solution to obtain biodiesel. The purpose of the research was to obtain the optimum condition of the transesterification reaction, the best percent yield, and the compounds contained in the biodiesel and to compare the biodiesel obtained with SNI 7182:2015 based on the parameters of density, acid number, flash point, and cetane number. Based on the results of the study, the optimum condition obtained was at a ratio of 1:12 with a 2% KOH alkali catalyst and a yield of 92.65%. The biodiesel quality test results meet the standard requirements according to SNI 7182: 2015 with a density value of 0.86 gr/cm3, viscosity of 4.205 cSt, acid number 0.23 mgKOH/g, flash point 176.2 oC, and cetane number 68.2. The results of GCMS analysis showed 9 peaks identified with the main components of the compounds contained were hexadecanoic acid, methyl ester; 9,12-octadecadienoic acid, methyl ester; 9-octadecenoic acid, methyl ester.
Pemberdayaan Kelompok Wanita Tani Prabumulih melalui Workshop Studi Kelayakan Bisnis: Pengabdian Marieska Lupikawaty; Neneng Miskiyah; Martha Aznury; Anerasari Meidinariasty
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 1 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 1 (Juli 2025 -
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i1.2277

Abstract

This community service program empowered the Kemuning Women Farmers Group (KWT) in Prabumulih through a Business Feasibility Study Workshop to address managerial challenges and enhance business sustainability. A participatory approach was applied to build technical capacity in five areas: (1) basic financial management, (2) digital marketing strategies using WhatsApp, (3) optimizing limited land production through recycled hydroponics and tiered polybag cultivation, (4) human resource management based on skill mapping, and (5) structured risk mitigation. Collaboration among PT Pertamina EP Prabumulih Field, Sriwijaya State Polytechnic, and the local government was key to success. Outputs included operational documents and behavioral changes in business management. Evaluation showed improved KWT capacity in financial feasibility, production efficiency, and risk readiness, transforming the business model from subsistence to sustainable women’s agripreneurship.
Pemanfaatan Cangkang Kemiri Sebagai Katalis CaO (Candlenut Shell) yang Terimpregnasi KOH dalam Produksi Biodiesel Minyak Jelantah melalui Reaksi Transesterifikasi Nur Sha’in; Anerasari Meidinariasty; Akbar Ismi Aziz Pramito
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The growing demand for environmentally friendly and renewable alternative fuels, with biodiesel being a prominent candidate. Waste cooking oil (WCO), a widely available household waste, is a promising feedstock but requires an efficient catalyst to improve the transesterification process. The objective of this research was to investigate the effect of CaO catalyst derived from candlenut shells impregnated with KOH, and to determine the optimum methanol-to-oil molar ratio and catalyst concentration. The results showed that the optimum condition was achieved at a 1:6 molar ratio with 1.5% catalyst, producing biodiesel with a density of 0.877 g/mL, viscosity of 4.6 cSt, acid value of 0.25 mg KOH/g, cetane number of 54.7, and yield of 85%, all in accordance with the Indonesian National Standard (SNI 7182:2015). GC-MS analysis revealed a total fatty acid methyl ester (FAME) content of 99.57%, dominated by compounds such as methyl oleate, methyl stearate, and methyl linoleate, indicating near-complete conversion. These findings confirm the potential of CaO-KOH catalyst from candlenut shell waste as an effective heterogeneous catalyst for producing high-quality and sustainable biodiesel.
Ekstraksi Silika Gel dari Ampas Tebu dan Sekam Padi dengan Variasi Konsentrasi NaOH dan Rasio Bahan Baku Sania, Rasty; Anerasari Meidinariasty; Cindi Ramayanti
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The growing demand for environmentally friendly and sustainable materials has encouraged the exploration of agricultural waste as an alternative source of silica gel. Conventional silica gel production relies on quartz sand, which is non-renewable and requires high energy consumption. In this study, sugarcane bagasse ash and rice husk ash were utilized as potential raw materials due to their high silica content. The objective was to examine the influence of different raw material ratios and NaOH concentrations on the characteristics of the synthesized silica gel. The synthesis process involved calcination at 700°C for 4 hours, alkaline extraction using NaOH solutions (1.5 M, 2 M, and 2.5 M), and precipitation with H₂SO₄ (0.5 M), followed by drying at 110°C. The obtained silica gel was characterized for moisture content, water adsorption capacity, pH, and functional groups using FTIR spectroscopy. FTIR analysis revealed the presence of siloxane (Si–O–Si) and silanol (Si–OH) groups, confirming the successful formation of silica gel. The optimal composition was achieved at a ratio of 75% rice husk to 25% sugarcane bagasse with 2.5 M NaOH, resulting in the lowest moisture content (0.07%) and the highest water adsorption capacity (41%). These findings demonstrate that the high silica content in rice husk and appropriate alkali concentration enhance gel structure formation and improve adsorption performance.
AKTIVASI KARBON AKTIF DARI SEKAM PADI DAN CANGKANG KELAPA SAWIT DENGAN H2SO4 SEBAGAI MEDIA ADSORPSI AMONIA (NH3) Nur Rahma, Alycia; Erika Dwi Oktavianti; Anerasari Meidinariasty
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 06 (2025): Chemical Engineering Journal Storage (CEJS)-December 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i06.24200

Abstract

Karbon aktif merupakan adsorben yang efektif dalam menghilangkan gas amonia (NH₃) dari udara maupun limbah industri. Penelitian ini bertujuan mengevaluasi kinerja karbon aktif berbahan campuran sekam padi dan cangkang kelapa sawit yang diaktivasi dengan larutan H₂SO₄ pada variasi konsentrasi 5, 10, 15, dan 20% serta waktu kontak 15, 30, 45, dan 60 menit. Proses pembuatan karbon aktif meliputi karbonisasi, aktivasi kimia, dan uji adsorpsi amonia. Kapasitas adsorpsi diukur secara gravimetri, sedangkan konsentrasi NH₃ diukur dengan gas detector. Karakterisasi XRD digunakan untuk mengetahui struktur kristal karbon aktif. Hasil penelitian menunjukkan kapasitas adsorpsi tertinggi sebesar 12,66% diperoleh pada konsentrasi H₂SO₄ 20% dan waktu kontak 30 menit. Model isoterm Freundlich memiliki kecocokan terbaik (R² = 0,9771) dibandingkan Langmuir (R² = 0,9073), menunjukkan proses adsorpsi fisik pada permukaan heterogen. Karbon aktif bersifat amorf dengan mikropori dominan. Penelitian ini membuktikan potensi limbah pertanian sebagai bahan baku adsorben ramah lingkungan dan ekonomis untuk pengendalian gas amonia. Kata Kunci: karbon aktif, sekam padi, cangkang kelapa sawit, amonia, adsorpsi, H₂SO₄.
Co-Authors Akbar Ismi Aziz Pramito Anggi Dwi Chandrika Cindi Ramayanti Erika Dwi Oktavianti Marieska Lupikawaty Martha Aznury Miskiyah, Neneng Muhammad Yerizam Nur Rahma, Alycia Nur Sha’in Sania, Rasty