Perancangan Pipa Landfill Gas pada Tempat Pemrosesan Akhir Sumur Batu Berdasarkan Pemodelan Emisi dan Dispersi Gas

Abstract

Tempat Pemrosesan Akhir Sumur Batu masih menerapkan sistem open dumping sehingga gas landfill hasil dekomposisi anaerobik sampah belum dikelola dan masih dilepaskan ke atmosfer. Penelitian ini bertujuan mengestimasi potensi emisi gas metana, menganalisis dispersi emisi, serta merancang sistem penangkapan gas landfill sebagai upaya mendukung penerapan sanitary landfill. Potensi emisi dihitung menggunakan metode First Order Decay IPCC tier 2 2006, sedangkan dispersi emisi dimodelkan menggunakan. Perancangan sistem penangkapan gas mengacu pada Peraturan Menteri Pekerjaan Umum Nomor 03/PRT/M/2013 dan pedoman US EPA. Produksi metana mencapai puncaknya pada tahun 2030, sebesar 13,479 Gg/tahun pada zona aktif. Konsentrasi maksimum hasil pemodelan AERMOD mencapai 204.362 µg/m³ dengan arah penyebaran dominan ke sektor utara dan timur. Berdasarkan hasil, dirancang sistem penangkapan gas yang terdiri atas pipa vertikal, pipa horizontal pada zona aktif serta pipa vertikal pada zona nonaktif, dilengkapi jaringan perpipaan, valve, condensate trap, blower, dan flare.

Sumur Batu Final Disposal Site still applies the open dumping method, resulting in landfill gas generated from the anaerobic decomposition being released directly into the atmosphere. This study aimed to estimate methane emission potential, analyze methane dispersion, and design a landfill gas collection system to support the implementation of a sanitary landfill. Methane emission potential was estimated using the 2006 IPCC Tier 2 First Order Decay (FOD) method, while the emission dispersion was modeled using AERMOD. The landfill gas collection system was designed in accordance with the Regulation of the Indonesian Ministry of Public Works No. 03/PRT/M/2013 and US EPA guidelines. Methane production reached its peak in 2030, with emissions of 13.479 Gg/year. The maximum AERMOD modeled methane concentration was 204,362 µg/m³, with the dominant dispersion pattern extending toward the northern and eastern sectors. Based on these findings, a landfill gas collection system was designed consisting of vertical and horizontal extraction pipes in the active zones and vertical extraction pipes in the inactive zones. The system is equipped with a piping network, valves, condensate traps, a blower, and a flare to support effective landfill gas collection and emission control.