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All Journal Media Ilmiah Teknik Lingkungan Calamity: A Journal of Disaster Technology and Engineering
Darmawan, Mohammad Akbar Ogy
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science

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Study on Biogas Production from Organic Waste of Food Leftovers and Garden Waste Using Green Phoskko 7 in a Fixed Dome Biodigester at PT Asmin Bara Bronang: Studi Pembentukan Biogas dari Sampah Organik Sisa Makanan dan Sisa Taman Menggunakan Green Phoskko 7 Pada Biodigester Fixed Dome di PT Asmin Bara Bronang Husaeni, Az'zahra Nuzula; Sari, Gina Lova; Ratnawati, Kania; Darmawan, Mohammad Akbar Ogy
Media Ilmiah Teknik Lingkungan (MITL) Vol. 10 No. 2 (2025): Media Ilmiah Teknik Lingkungan (MITL)
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mitl.v10i2.10210

Abstract

This study aims to evaluate biogas production from a mixture of food waste and garden waste using a fixed dome biodigester with GP-7 activator. Observed parameters include initial pH, temperature, and carbon-to-nitrogen (C/N) ratio. The fermentation was carried out for 30 days under anaerobic conditions. Results showed an initial pH of 7.00, temperature of 37.70 °C, and a C/N ratio of 24.41, which are within the optimal range. However, storage for ±15 days increased the C/N ratio to 33.31 due to nitrogen loss. Biogas volume increased sharply, peaking at 4.85 m³ on day 20, then declined to 0 m³ by the end of the fermentation period. This pattern reflects the microbial growth phases and the efficiency of organic matter conversion into gas. The study confirms that initial substrate characteristics and retention time play crucial roles in optimizing biogas production from organic waste in industrial environments.
An integrated framework of community resilience to earthquakes: Implications for disaster risk reduction and recovery engineering Pandu, Abraham Louis; Asril, Al Fitrah; Darmawan, Mohammad Akbar Ogy
Calamity: A Journal of Disaster Technology and Engineering Vol. 3 No. 2: (January) 2026
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/calamity.v3i2.2026.3082

Abstract

Background: Indonesia is prone to earthquakes because it is located at the meeting point of tectonic plates, resulting in many coastal areas having a high risk of disaster. Earthquakes not only cause physical damage but also have a long-term impact on the psychological and social conditions of the community. Therefore, community resilience is an important factor in reducing disaster risk and supporting the post-disaster recovery process. This study aims to examine the concept of community resilience in facing earthquakes and the factors that influence it. Methods: This scientific paper uses a literature review method by examining accredited scientific journals, disaster textbooks, official agency reports, and relevant laws and regulations. Findings: The results of the study show that community resilience to earthquakes is shaped by the integration of social, economic, physical and infrastructure aspects, human resources, and the environment. Social aspects and social capital play an important role in accelerating post-disaster response and recovery, while economic capacity and infrastructure quality determine the community's ability to absorb the impact of disasters. These findings are in line with resilience theory, which emphasizes adaptive capacity and collective engagement as key factors in community resilience. Conclusion: Community resilience to earthquakes is built through the integration of social, economic, physical, human resource, and environmental aspects that reinforce each other. Strengthening the adaptive capacity of communities in an integrated manner is key to reducing the impact of disasters and supporting post-disaster recovery and sustainability. Novelty/Originality of this article: The novelty of this research lies in its comprehensive conceptual synthesis of community resilience to earthquake disasters by integrating social, economic, physical, human resource, and ecological perspectives into a single framework of discussion.
Co-Authors Asril, Al Fitrah Gina Lova Sari Husaeni, Az'zahra Nuzula Pandu, Abraham Louis Ratnawati, Kania