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Sutasoma, I Wayan Gde
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Impact of Moisture Variations on NH₃ and H₂S Emissions During Municipal Solid Waste Drying Using Waste Motor Oil Interceptor System: A Case from Denpasar, Bali Prakasa, I Made Panji Tirta; Andrayuga, I Wayan; Sutasoma, I Wayan Gde; Putra, Anak Agung Adi Wiryya
Journal of Engineering and Science Vol. 4 No. 1 (2025): June
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v4i1.233

Abstract

Municipal solid waste (MSW) production continues to rise globally, especially in developing countries such as Indonesia, creating significant environmental challenges. This study investigates the impact of moisture content (MC) variation on ammonia (NH₃) and hydrogen sulfide (H₂S) emissions during the MSW drying process, and evaluates the effectiveness of a gas capture system using waste motor oil (WMO). Laboratory-scale experiments were conducted at Universitas Pendidikan Nasional in collaboration with Universitas Udayana, using MSW samples conditioned at five moisture levels: 50%, 40%, 30%, 20%, and 10%. Emissions were measured before and after treatment with the WMO-based interceptor system. The results showed that the highest gas emissions occurred at 50% MC, with corresponding reduction efficiencies of 73.9% (50% MC), 70.0% (40%), 72.1% (30%), 55.9% (20%), and 5.4% (10%). Higher MC was associated with increased anaerobic microbial activity and organic matter decomposition, leading to elevated NH₃ and H₂S generation. The WMO system demonstrated strong gas adsorption performance, particularly at moderate to high MC levels. These findings suggest that controlling MC and applying low-cost WMO-based gas interception can significantly reduce emissions in waste drying processes. This approach holds promise for improving air quality in urban waste management systems, especially in resource-limited settings.
Impact of Moisture Variations on NH₃ and H₂S Emissions During Municipal Solid Waste Drying Using Waste Motor Oil Interceptor System: A Case from Denpasar, Bali Prakasa, I Made Panji Tirta; Andrayuga, I Wayan; Sutasoma, I Wayan Gde; Putra, Anak Agung Adi Wiryya
Journal of Engineering and Science Vol. 4 No. 1 (2025): June
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v4i1.233

Abstract

Municipal solid waste (MSW) production continues to rise globally, especially in developing countries such as Indonesia, creating significant environmental challenges. This study investigates the impact of moisture content (MC) variation on ammonia (NH₃) and hydrogen sulfide (H₂S) emissions during the MSW drying process, and evaluates the effectiveness of a gas capture system using waste motor oil (WMO). Laboratory-scale experiments were conducted at Universitas Pendidikan Nasional in collaboration with Universitas Udayana, using MSW samples conditioned at five moisture levels: 50%, 40%, 30%, 20%, and 10%. Emissions were measured before and after treatment with the WMO-based interceptor system. The results showed that the highest gas emissions occurred at 50% MC, with corresponding reduction efficiencies of 73.9% (50% MC), 70.0% (40%), 72.1% (30%), 55.9% (20%), and 5.4% (10%). Higher MC was associated with increased anaerobic microbial activity and organic matter decomposition, leading to elevated NH₃ and H₂S generation. The WMO system demonstrated strong gas adsorption performance, particularly at moderate to high MC levels. These findings suggest that controlling MC and applying low-cost WMO-based gas interception can significantly reduce emissions in waste drying processes. This approach holds promise for improving air quality in urban waste management systems, especially in resource-limited settings.
Variasi Temperatur Termophilic Pada Digester Biogas Berbahan Baku Limbah Kulit Durian Prakasa, I Made Panji Tirta; Sutasoma, I Wayan Gde; Tapa, I Gede Fery Surya; Dayanti, Made Ari Riska
Jurnal Mekanik Terapan Vol 6 No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v6i3.7910

Abstract

The global energy crisis and Indonesia's dependence on fossil fuels (BBF) have driven the need to explore renewable energy sources. Biogas, as a sustainable solution, is produced through anaerobic degradation of materials with methane (CH₄) 50–75% and carbon dioxide (CO₂) 30–45% as its dominant components. Agro industrial waste such as durian peel shows great potential for biogas production, as Indonesia produces more than 19 thousand tons of durian annually according to the 2024 Statistics Indonesia report. Utilizing durian peel is ideal since its composition (65–80%) is significantly higher than that of the pulp (20–35%) and seeds (5–15%). This study employed a substrate ratio of 5 grams of total solids (TS) + 100 mL of inoculum + 200 mL of distilled water, with intermittent stirring (three times per day, 1 minute per session). The tested temperature variations under thermophilic conditions 40°C, 45°C, and 50°C, including one control without heating. The analysis focused on daily pressure accumulation and gas composition profiles (CH₄ and CO₂). The results show that 40°C (thermophilic condition) achieved maximum efficiency due to optimal methanogenic microbial activity, producing higher methane (CH₄) yield compared to other temperatures. This study contributes to the development of renewable energy from agricultural waste in tropical regions and supports Indonesia’s national energy transition program.
Co-Authors Andrayuga, I Wayan Dayanti, Made Ari Riska I Gede Fery Surya Tapa Prakasa, I Made Panji Tirta Putra, Anak Agung Adi Wiryya