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All Journal IKRA-ITH ABDIMAS Aptekmas : Jurnal Pengabdian Kepada Masyarakat Serambi Engineering
Cindi Ramayanti
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Journal : Serambi Engineering

 1 
Pemanfaatan Limbah Kulit Nanas sebagai Penstabil Biosintesis ZnO untuk Pengolahan Limbah Palm Oil Mill Effluent Kelapa Sawit Kana; Yuniar; Cindi Ramayanti
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Oil palm is one of the most common plants in the province of South Sumatra. The income of oil palm has increased every year, and also followed by an increase in the waste produced by oil palm. The waste produced is liquid waste or known by another name POME. There is no technology that is efficient enough to process this POME waste. Photocatalyst is a technology that uses light, either UV light or sunlight, which produces radial compounds that break down the oxygen in POME. The type of catalyst used in this research is ZnO from the biosynthesis of pineapple peel, the application of the catalyst to POME waste with a catalyst variation of 120 mg and 140 mg and also variations in irradiation time of 15, 30, 45, 60 and 75. The most efficient result for the degradation of POME waste is obtained at an irradiation time of 75 minutes with 140 mg catalyst weight.
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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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.
Metanasi CO2 menggunakan Katalis Ni/Al2O3 dengan Variasi Konsentrasi KOH dan Temperatur Nanda Putri, Azadia; Robert Junaidi; Cindi Ramayanti
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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The transportation sector is one of the largest contributors to greenhouse gas emissions, which play a significant role in global climate change. One preventative measure that can be taken is to convert carbon dioxide (CO₂) into methane (CH₄), known as the CO₂ methanation process. The purpose of this study was to produce methane gas with a higher conversion percentage, as well as to observe the effect of variations in operating temperature and KOH liquid concentration on the methane gas produced. In this study, CO2 was used as the raw material with a Ni/Al2O3 catalyst and zn promoter. The temperature was set at 165°C, 175°C, 185°C, 195°C, and 205°C, with KOH liquid concentrations varying from 4M to 5M. The resulting methane (CH4) gas will be analyzed using a Multi Gas Detector Analyzer.
Co-Authors Anerasari Meidinariasty Apri Mujiyanti Dilia Puspa Fenoria Putri Feri Helen Chairunisa Kana Kartika Rachma Sari Muhammad Yerizam Mustain Zamhari Nanda Putri, Azadia Robert Junaidi Sania, Rasty Saqila Putri Aulia Selastia Yuliati Sofiah Yuniar