A Mass Balance Method for Assessing Emergy Benefit of Waste Mining for Refuse Derived Fuel Production

Abstract

Abstract-Waste mining has been implemented in Gresik City since 2013. The aged waste is processed into refuse-derived fuel (RDF) for Cement Industry. The study objects to calculate the benefit of waste mining activity using emergy analysis. Mass balance analysis assesses total waste flow for separation, composting, and RDF production. Waste separation done by 72 scavengers in landfill contributes 1.54% waste reduction (1.3 ton waste) and 228.5 US$/day income by selling them to middle man. Meanwhile, 265.6 ton aged waste excavated from landfill is screened, shredded and processed into 72.68 ton/day RDF type 2. By-product of this process is 184.32 ton/day residue (soil-like substances) used for land reclamation. RDF produced from landfill can substitute coal consumption in cement industry for 4.25 years. Emergy calculation comes to the result that waste treatment in landfill through scavenging, composting and waste mining contributes gross emergy benefit of 2.14E+22 seJ/yr. Index Terms-Landfill, refuse derived fuel, mass balance analysis, Emergy analysis.

Implementasi Kebijakan Pengurangan Penggunaan Kantong Plastik

“…Sistem open dumping harus direvitalisasi menjadi controlled landfill untuk kota sedang/kecil dan sanitary landfill un-tuk kota besar menyesuaikan dengan kondisi tempat pemrosesan akhir masing-masing wilayah. Hal ini dikarenakan terkendala ketersediaan lahan dan biaya konstruksi (Meidiana & Mashita, 2018).…”