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Andrayuga, I Wayan
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering

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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.
COMPARATIVE STUDY ON BIO-BRIQUETTE PRODUCTION USING COCONUT SHELL AND SEASHELL: EFFECTS OF SIZE, RATIO, PYROLYSIS, AND BINDER Dewi, Resti Nurmala; Perceka, Medal Lintas; Dia Utari, Siluh Putu Sri; Andrayuga, I Wayan; Azimatun, Muhamad Maulana Nur; Qurrahman, Taufiq; Arifin, Samsul; Ardiyanti, Putu Ayu; Pajriyanti, Nurlaela; Irwandi, Nurul Anisa
Indonesian Fisheries Research Journal Vol 31, No 1 (2025): June (2025)
Publisher : Jakarta Technical University of Fisheries

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/ifrj.1.1.2025.%p

Abstract

Briquettes are seen as a substitute for alternative fuels generated through pyrolysis. A common type of briquette is charcoal made from coconut shells. However, they have poor combustion duration and excessive combustion smoke. It is thought that adding shells to coconut shell briquettes can increase their quality while making better use of waste since shells have adsorption characteristics. Hence, this study intended to produce shells briquettes on many main factors, namely pyrolysis time, particle size, raw materials ratio, and binder concentration. The method utilized pertained to preliminary study by blending pyrolyzed coconut shell charcoal, shells, and tapioca flour. In line with the American Standard Testing and Material (ASTM) 2014, proximate analysis was conducted using the Thermogravimetric Analysis 201; in contrast, briquette calorific value was determined using the GDY-1A bomb calorimeter, which is in compliance with ISO 1928:2020. According to the findings, the best shell briquettes was found at 2.5 hours pyrolysis durations with a particle size of 50 mesh, a raw material ratio of 3:1 (charcoal : shell) and 50% binder concentration with 13.53 ± 0.23% water content; 39.91 ± 0.31% volatile matter content, 15.70 ± 0.07% ash content, 67.66 ± 0.68% fixed carbon content) (P < 0.05), and a calorific value of 1,942.126 cal/g. Nonetheless, the results were not ideal as the calorific value was lower compared to full charcoal briquettes. Therefore, to improve proximate quality and combustion efficiency, it is required to combine seashells with other materials that are higher in carbon or to modify the method.
Co-Authors Ardiyanti, Putu Ayu Azimatun, Muhamad Maulana Nur Irwandi, Nurul Anisa medal lintas perceka Pajriyanti, Nurlaela Prakasa, I Made Panji Tirta Putra, Anak Agung Adi Wiryya Qurrahman, Taufiq Resti Nurmala Dewi Samsul Arifin siluh putu sri dia utari Sutasoma, I Wayan Gde