Reclaimed Products to Recycling and Energy Recovery for Sustainable Use of Closed Non Sanitary Landfills through Reclamation Works

potential assessment of converting closed non sanitary landfills into sustainable landfill through the reclamation works(= landfill mining project) of illegal landfill discovered in land development site using Sustainable Landfill Reclamation system(SLR-system) was investigated. The SLR system had treatment capacity of 91.4 $m^3/hr$ (130.61 ton/hr) in condition of 28.0% of water content. Recovery ratio and purity of sorted soil were 98.9% and 99.66%, respectively. Sorted combustibles were 91.8% and 92.0%, respectively. Especially, high heating value (HHV) and low heating value(LHV) of combustibles were 4,282kcal/kg and 3,636 kcal/kg, respectively, in considering the energy content and recovery ratio of combustibles. Therefore, combustibles separated from landfill site have higher value than Fluff RDF standard value(3,500kcal/kg) of MOE. RDF can be produced with combustibles by 84.43%. Averaged size and organic foreign matter content of the sorted soil were less than 035mm and 0.31 %(VN), respectively. In addition, concentration of all contents of hazardous matters containing soils met safety standards. Therefore, it is possible to be recycled as refilling and cover materials to rebuild Sustainable landfills by 98.42%.

사용종료(使用終了) 비위생매립지(非衛生埋立地)의 순환적(循環的) 사용(使用)을 위한 선별물질(選別物質)의 활용(活用) 가능성(可能性) 평가(評價)

대전시 ${\bigcirc}{\bigcirc}$ 권역 택지발지구내 불법매립지 선별 정비사업과정에서 회수된 선별결과물의 재활용성 및 에너지전환 기능성을 평가하였다. 본 연구에서 사용된 순환형 매립정비시스템(SLR-System, Sustainable Reclamation-System)은 수분함량 약 28.0%조건에서 약 91.4 $m^3/hr$ (about 130.61 ton/hr)의 처리 성능을 보였으며, 선별결과물의 회수율과 순도는 선별토사가 약 98.9%와 약99.66%, 선별가연물류가 약 91.8%와 약 92.0%로 각각 측정되었다. 특히, 선별토사의 경우, 입도크기가 ${\O}$35 mm이하로 유기이물질 함량이 0.31%(V/V)로 재활용법적 기준치를 만족하였으며, 최대 약 98.42%까지 재활용이 가능한 것으로 평가되었다 또한, 선별가연물의 경우, 저위발열량이 약 3,636 kcal/kg으로 RDF 품질기준을 만족하였으며 최대 약 84.43%까지 RDF 생산이 가능한 것으로 측정되었다.