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Ketut Sumada
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Studi Kuantitas dan Kualitas Biogas dari Berbagai Jenis Limbah Organik dan Waktu Fermentasi Zahran William Dzulfiqar; Muhammad Miftahul Rizki; Ketut Sumada
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Biogas is a renewable energy obtained from the fermentation process or decomposition of organic materials by microorganisms in an environment without oxygen (anaerobic). This study aims to analyze the quantity and quality of biogas generated from various types of organic waste, including mustard greens, water spinach, cabbage, raja banana peels, and Medan orange peels, with fermentation periods of 10, 12, 14, 16, and 18 days. The quantity of biogas was measured based on the volume produced, while its quality was determined by the methane (CH₄) content using the Orsat Gas Analysis Apparatus. The results showed that raja banana peels produced the highest quantity and quality of biogas, with a maximum volume of 1393.2 ml and the highest methane content at 70.39% among all samples. These findings indicate that raja banana peels have significant potential as a substrate for biogas production. This research is expected to serve as a foundation for the development of technologies that utilize organic waste as an efficient, environmentally friendly, and sustainable alternative energy source.
Pembuatan Pupuk Organik Cair Berbahan Dasar Limbah Batang Tembakau Secara Fermentasi Anaerob Yasmiati; Nadya Lenvylea Laras; Ketut Sumada
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Tobacco is a widely cultivated agricultural commodity in Indonesia, producing significant waste in the form of stalks and roots. Currently, these wastes have not been widely utilized and are only dumped into the environment. Tobacco stalks contain essential nutrients and can potentially be used as raw material for liquid organic fertilizer (LOF). Therefore, research was conducted on the manufacture of liquid organic fertilizer from tobacco stem waste and evaluating the effect of tobacco stem weight and fermentation time on the quality of the LOF produced. The weights used were 25 g, 50 g, 75 g, 100 g, and 125 g, with fermentation times ranging from 1 to 5 weeks. The fermentation process was carried out in sealed bottles with additional coconut water, palm sugar, and EM-4, after cutting the stalks into small pieces (0.5–1 cm). The quality of the LOF was assessed based on organic carbon and nitrogen content using titrimetri and Kjeldahl methods. Results showed that increasing stalk weight elevated both organic carbon and nitrogen levels. Longer fermentation reduced organic carbon but increased nitrogen content up to an optimal point. Optimization of both variables is crucial to improve LOF quality.
Co-Authors Muhammad Miftahul Rizki Nadya Lenvylea Laras Yasmiati Zahran William Dzulfiqar