Muhamad Khafid Rifai, Hartati Kartikaningsih, Agus Susilo, Yoga Sita Kristama
Municipal solid waste (MSW) contributes to methane emissions from anaerobic decomposition. Reducing MSW through 3R waste management at the municipal level can significantly lower methane, which has a short atmospheric lifetime of 12 years. This study evaluates methane reduction through a 3R facility using Minitab 22 for trend analysis, moving average, and exponential smoothing models. Results show high accuracy (<10% error) across all scenarios, with the best-fit model predicting significant waste reduction. Scenario 3 reduces landfill waste by 188.03 tons/year in 2024 and 203.53 tons/year in 2033, cutting methane emissions by 0.829126 tons-CO2-eq/year in 2024 and 0.897479 tons-CO2-eq/year in 2033—8-10% of Jabon landfill emissions. Optimizing 3R facilities, especially in Sidoarjo, effectively reduces methane emissions. © 2025, Diponegoro University. All rights reserved.
Master Program of Environmental Management and Development, Universitas Brawijaya, Malang, 65154, Indonesia; Faculty of Fisheries and Marine Sciences, Universitas Brawijaya, Malang, 65145, Indonesia; Faculty of Animal Science, Universitas Brawijaya, Malang, 65145, Indonesia; University of Waikato, New Zealand
