매립장 주요 배출경로별 매립가스 표면발산량 및 산화율 분석

천승규,박종근,김명관 한국응용과학기술학회 2023 한국응용과학기술학회지 Vol.40 No.3

수도권에 위치한 S매립장 내 3개의 매립장을 대상으로 매립가스 배출 및 주요 경로별 표면발산과 관련된 분석을 하였다. 전체 매립가스 발생비율 10.9%인 LS1이 총 표면발산 비중은 49.4%를차지하고 있었다. 3개 매립장에서의 메탄의 총 표면발산은 13.6 Nm3/min로서, LS1 8.4 Nm3/min (61.7%), LS2 4.0 Nm3/min(29.4%), LS3 1.2 Nm3/min(8.9%)이고, 발산경로별로는 상부 7.3 Nm3/min (53.2%), 사면 6.4 Nm3/min(46.7%), 다이크 0.02 Nm3/min(0.1%)이었다. 3개 매립장의 주요 배출경로별 산화율은 다이크가 87.5%로 가장 크고, 상부 72.3%, 사면 71.8% 순이었다. 메탄을 기준으로 표면발산 기여율은 매립장 별로 LS1이 전체의 61.7%로 가장 컸다. 주요 배출경로별로는 LS1의 사면이 전체의41.7%, LS2의 상부 24.4%, LS1의 상부 20.0%로서 S매립장의 전체 메탄 표면발산량의 86.1%를 차지함에 따라 향후 집중적인 관리가 필요할 것으로 판단되었다.

매립지내 환경에너지단지의 무방류 시스템 구축방안

천승규 대한상하수도학회 2013 상하수도학회지 Vol.27 No.5

A research was performed for zero discharge system of waste water which is produced from energy recovery process of waste and biomass. Leachate and all kinds of waste water should be separated and integrated into three categories in addition to converting existing leachate treatment facility into waste water treatment facility as well as introducing a management system of reverse osmosis membrane facility and bioreactor landfill. Following these conditions to better water treatment process, it was likely to produce over 3,000 tons of low-grade recycling water and 2,000 tons of high-grade recycling water per day when zero discharge system of waste water is applied starting from 2016. Economical efficiency was also surveyed in total treatment fee. Present system costs 18,129 million won per year, and suggested zero discharge system would cost 15,789 million won per year.

Estimation of Landfill Stabilization using Carbon-based Mass Balance Evaluation

천승규 한국지하수토양환경학회 2016 지하수토양환경 Vol.21 No.2

In order to evaluate landfill stabilization based on organic carbon, stoichiometric analysis and a biological methane potential (BMP) test based on modeling were performed at the 2nd Sudokwon Landfill Site. Mass balance analysis through a BMP test proved to be more adaptable for evaluation, and it showed that 28.9% of landfill organic carbon was expected to remain by 2046, 30 years after landfill closure. The organic carbon ratio of total landfill waste for 2046 is forecasted as 2.9% in demolition waste and 5.1% in household waste, and, if one were to consider plastic as an organic waste, the ratios would increase to 15.9% and 28.3%, respectively. Therefore, it seems that organic matter biodegradation facilitating measures such as bioreactor landfill technology and preemptive recovery of combustible waste are necessary to shorten post closure management periods and to meet the landfill stabilization guidelines more safely.

매립 폐기물의 고형연료화와 LFG 포집시의 에너지 생산성 비교 분석

천승규 한국폐기물자원순환학회 2011 한국폐기물자원순환학회지 Vol.28 No.7

매립장 사후관리종료를 위한 유기물 함량비 산정방법

천승규 한국지하수토양환경학회 2019 지하수토양환경 Vol.24 No.4

This paper examines an assessment method for terminating the post-closure maintenance of a landfill using a simplifiedlandfill gas model. The case study site is the Sudokwon Landfill in Incheon city, which was closed in 2000. The deviationsof the results obtained by the regular model and the simplified model were both slightly over 10% from the measured data. Also, the deviation of the simplified model from the regular model has been less than 5% since 2005. Thus, the simplifiedmodel could be applied to other landfills that have been closed for at least 5 years. Additionally, the results of the massbalance analysis using the simplified landfill gas model indicated that 39% of the organic carbon was discharged, leadingto organic carbon and organic matter content of 7.2 and 17.6%, respectively, in the landfill by the end of 2018.

현장 굴착시료 분석에 의한 매립지 안정화도 평가 연구

천승규,심낙종,전은정,윤수경,박정현 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.5

The organic carbon contents of excavated waste samples were analyzed for the evaluation and forecasting of thestabilization state and aftercare period of the first landfill of the Sudokwon Landfill Site. The total disposed matter was83.1 × 106 Mg (56.5 × 106 Mg on a dry basis), of which organic carbon was 6.4 × 106 Mg (a content ratio of 11.3%). Coarse incombustibles, vinyl, and mixed organic matter had weight ratios of 7.8%, 16.6%, and 75.7% respectively, witha total average moisture content of 37.1%. The average organic carbon content ratio was 5.1%, with 45.1% remainingcompared to the disposed of amount. As almost all of the biochemically degradable carbon was emitted, satisfying landfillstabilization criteria for organic matter content is challenging under current landfill management practices.

매립장 침출수 주요 수질항목에 대한 장기 영향요소

천승규,김민혁,원종철 한국지하수토양환경학회 2021 지하수토양환경 Vol.26 No.1

Analysis of long term affecting factors on water quality items of gas emission form (BOD, COD) and leachate emissionform (T-N, non-bio-degradable COD (NBDCOD)) was performed for the SUDOKWON 1st Landfill Site (LS1) and 2ndLandfill Site (LS2). As landfill gas was generated, BOD and COD decreased from 6,887 and 20,025 mg/L in 1993 to 49.5and 670.2 mg/L in 2019, respectively. TN and NBDCOD increased with waste decomposition but gradually decreasedafter landfill closure because of the precipitation infiltration effect. Due to the drastic decline of carbon in the leachate, theBOD/TN ratios of LS1 and LS2 declined from 13.0 and 17.0 during early stage of the landfill to 0.07 and 0.16 in 2019,respectively; LS2 and NBDCOD/COD increased from 0.25 to 0.65 during the same period. These conditions causedcarbon deficiency in denitrification treatment and a chemical post-treatment request for NBDCOD. The differentbehaviors of gas emission and leachate emission items suggest the necessity of different strategic approaches in the longterm perspective.

매립장 물 수지 평가를 위한 매립가스 생성시의 수분 소모량 분석

천승규 한국폐기물자원순환학회 2018 한국폐기물자원순환학회지 Vol.35 No.4

A comprehensive water budget analysis considering the water consumed for landfill gas formation was performed for Sudokwon Landfill Site 2 (LS2) from October 2000 through December 2016. The weighted average mole ratios of carbon (C), hydrogen (H), and oxygen (O) of the total disposed waste were 30.4%, 48.8%, and 20.8% respectively. The total emitted H and O as CO2 and CH4 from landfill gas was 2,812×103 Mg, of which 28.6% (803×103 Mg) was supplied from water. The total emitted water quantity consisted of landfill gas at 8.4%, leachate at 90.2%, and vapor in landfill gas at 1.4%. The total supplied water quantity to LS2 was 22.0×106 Mg, and the quantity supplied from water included in disposed waste was 62.9%. Considering the supplied and emitted water quantity, the retained quantity in LS2 was estimated to be 12×106 Mg, and the emitted and retained quantities were 43.3% and 56.7%, respectively. Considering the retained quantity, the water content in LS2 was estimated to be 26.0%, far below the optimum level for landfill site stabilization.

운영 중인 매립장에서의 메탄가스 발생 모델의 정합도 향상

천승규 한국유화학회 2016 한국응용과학기술학회지 Vol.33 No.1

The validity of landfill gas models is an important problem considering that they are frequently used for landfill-site-related policy making and energy recovery planning. In this study, the Monte Carlo method was applied to an landfill gas generation model in order to enhance conformity. Results show that the relative mean deviation between measured data and modeled results (MD) decreased from 19.8% to 11.7% after applying the uncertainty range of Intergovernmental Panel on Climate Change (IPCC) to the methane-generation potential and reaction constants. Additionally, when let reaction constant adjust derived errors from all other modeling components, such as model logic, gauging waste, and measured methane data, MD decreased to 6.6% and the disparity in total methane generation quantity to 2.1%.

매립가스 일차분해 모델의 붙확실성도 분석 연구

천승규 한국폐기물자원순환학회 2010 한국폐기물자원순환학회지 Vol.27 No.8