건설폐기물의 물질흐름분석을 통한 실질 재활용률 산정 연구 (A Study of the Determination of Actual Recycling Rate of Construction and Demolition Waste using Material Flow Analysis (MFA) in Korea)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 33권 / 5호 / 483 ~ 491페이지
· 저자명 : 고영재, 장용철

초록

In this study, the recycling processes of construction and demolition waste (C&D waste) were analyzed, and its nationalrecycling rate was determined using material flow analysis (MFA). Available statistical data provided by Ministry ofEnvironment and Korea Environment Corporation were used for the MFA study. The collected data were carefullyexamined and validated by field investigations. System boundary for MFA covered from waste generation fromconstruction sites to final disposal in 2013. The field investigation showed that recycled aggregate is produced throughmechanical shredding, separation, and screening processes of C&D waste. The production efficiency (or process yield)was estimated to be approximately 81.2% on average. The foreign materials in the waste accounted for 18.8% by weight.
The separated impurities were sent to recycling facilities, incineration facilities, or landfill sites, depending on the physicochemicalcharacteristics. Efficiency of recycling facilities and the statistical data were integrated to estimate the nationalactual recycling rate, which turned out to be 87.7% in 2013. Approximately 49.1% of the construction-related waste wasrecycled as recycled aggregate for concrete production and road base layer for asphalt pavement. Based on the result ofMFA, there is 9.8% difference between the actual recycling rate in this study and reported recycling rate by nationalstatistics. In the future, more various C&D waste treatment and disposal facilities, along with aggregate recycling facility,should be investigated to verify the actual recycling rate determined by this study. Statistical accuracy should be furtherrefined through additional field investigations. Our findings can be applicable to development of recycling policies andbest management practices for C&D waste streams.

영어초록

In this study, the recycling processes of construction and demolition waste (C&D waste) were analyzed, and its nationalrecycling rate was determined using material flow analysis (MFA). Available statistical data provided by Ministry ofEnvironment and Korea Environment Corporation were used for the MFA study. The collected data were carefullyexamined and validated by field investigations. System boundary for MFA covered from waste generation fromconstruction sites to final disposal in 2013. The field investigation showed that recycled aggregate is produced throughmechanical shredding, separation, and screening processes of C&D waste. The production efficiency (or process yield)was estimated to be approximately 81.2% on average. The foreign materials in the waste accounted for 18.8% by weight.
The separated impurities were sent to recycling facilities, incineration facilities, or landfill sites, depending on the physicochemicalcharacteristics. Efficiency of recycling facilities and the statistical data were integrated to estimate the nationalactual recycling rate, which turned out to be 87.7% in 2013. Approximately 49.1% of the construction-related waste wasrecycled as recycled aggregate for concrete production and road base layer for asphalt pavement. Based on the result ofMFA, there is 9.8% difference between the actual recycling rate in this study and reported recycling rate by nationalstatistics. In the future, more various C&D waste treatment and disposal facilities, along with aggregate recycling facility,should be investigated to verify the actual recycling rate determined by this study. Statistical accuracy should be furtherrefined through additional field investigations. Our findings can be applicable to development of recycling policies andbest management practices for C&D waste streams.

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