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All Journal Jurnal Pengendalian Pencemaran Lingkungan (JPPL) NUSANTARA: Jurnal Pengabdian Kepada Masyarakat Journal Serambi Engineering (JSE) Journal of Sustainable Energy Development
Zeni Ulma
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences

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Journal : Serambi Engineering

 1 
Optimalisasi Proses Degumming Minyak Biji Ketapang Menggunakan Asam Fosfat dan NaOH sebagai Bahan Baku Biodiesel Syabriyana, Maliya; Zeni Ulma; Ais Shenly Eka Putri Vinzani
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Ketapang seeds (Terminalia catappa) are a potential source of vegetable oil as a feedstock for biodiesel production. However, the use of ketapang seed oil remains very limited. Degumming is a crucial step in biodiesel production as it determines the quality of the raw material preparation. Various methods can be used to remove gum, including heating and the addition of acids (H3PO4, H2SO4 and HCl) or bases (NaOH). The aim of this study is to maximise the quality of biodiesel feedstock by improving the degumming efficiency using different concentrations of phosphoric acid (H3PO4) and NaOH. The phosphoric acid concentrations used were 0.5%, 1% and 1.5% v/v and the NaOH concentrations were 0.5%, 1% and 1.5% w/w. The degumming process was carried out at 80 °C with stirring for 30 min at each stage. After degumming, ketapang oil has excellent clarity compared to before treatment. Based on the research conducted, the optimum degumming conditions were found at a phosphoric acid concentration of 0.5% v/v and a NaOH mass of 1% w/w, resulting in an FFA content of 0.4% and a density of 902.5 kg/m³.
The Role of Calotropis gigantea Leaves as a Natural Binder in Corncob Briquettes Enhanced with LDPE Zeni Ulma; Syabriyana, Maliya; Livia Ayu Ardilasari
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Briquetting represents one of the key technological pathways for biomass utilization, particularly when combined with plastic waste that is otherwise difficult to manage. This study aims to analyze the effect of Calotropis gigantea (Biduri leaves) as a natural binder on the characteristics of briquettes made from corncob charcoal and low-density polyethylene (LDPE) plastic waste.  Corncobs were carbonized at 300-400 °C for approximately 4 hours, and briquettes were formulated with a constant corncob-to-LDPE ratio of 70:30. Five binder compositions (15%, 20%, 25%, 30%, and 35% of total briquette mass) were tested to determine the optimal formulation. Physical and chemical properties including moisture content, ash content, volatile matter, fixed carbon, calorific value, density, and bulk density, were analyzed. The results demonstrated that the 15% binder composition (V1) achieved the best performance, meeting SNI requirements with a moisture content of 2.947%, ash content of 6.790%, volatile matter of 3.536%, fixed carbon of 86.727%, calorific value of 7216.649 cal/g, density of 0.932 g/cm³, and bulk density of 0.326 g/cm³. This research highlights the novelty of employing Calotropis gigantea leaves as a sustainable binder in LDPE-modified biomass briquettes. The findings confirm that natural binders can enhance briquette quality while reducing reliance on synthetic adhesives, offering a viable pathway toward environmentally friendly household energy solutions.
Co-Authors Ais Shenly Eka Putri Vinzani Arsita Nur Rizkia Putri Choirunnisa Firdaus Ivana Livia Ayu Ardilasari Michael Joko Wibowo Mukasi Wahyu Kurniawati Murni Handayani Nur Faizin Reynadi Febri Afiandi Risse Entikaria Rachmanita SAIFUL ANWAR Syabriyana, Maliya