• Title, Summary, Keyword: Landfill leachate

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The Assessment of Stabilization of Open-dumping Landfill Leachate - A Case Study of Noeun Landfill - (비위생매립지 침출수의 안정화 평가 - 노은매립지 사례연구 -)

  • Hong, Sang-Pyo
    • Journal of Environmental Impact Assessment
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    • v.13 no.3
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    • pp.115-124
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    • 2004
  • To utilize a closed municipal solid waste landfill site in environmentally secure conditions, it is necessary to verify the stabilization level of landfill leachate. To assess leachate stabilization of an open-dumping municipal solid waste landfill (Noeun Landfill) which is located at the upper drainage basin of Namhan River which flows into Lake Paldang utilized for Seoul Metropolitan water supplies, the surrounding characteristics of the landfill site was surveyed. After then, leachate, groundwater and soil samples from this landfill were chemically analyzed, and the analysis results were evaluated by "The Criteria of Landfill Waste Stabilization(CLWS)", "Discharge Criteria of Landfill Leachate", "The Criteria of Domestic Use in Groundwater Quality", and "Soil Contamination Criteria" promulgated by Korean Ministry of Environment. The closed open-dumping landfill was equipped with the final soil cover, 3 groundwater monitoring wells and poor landfill gas extraction devices for the post-closure management of the landfill. BOD/CODcr ratios in leachate were less than or slightly higher than 1/10. This results seemed to imply that the leachate stabilization level of this landfill based on the CLWS was almost completed. Qualities of groundwater sampled from monitoring wells located at outside of landfill were adequate for "The Criteria of Domestic Use in Groundwater Quality". Finally, concentrations of soil contaminants that were likely to be influenced by this landfill site were adequate to "Soil Contamination Criteria".

Assessment on Stabilization of Open-dumping Landfill Based on Leachate - A Case Study of Salmi Landfill - (침출수 특성 분석을 통한 사용종료 비위생매립지 안정화 평가 - 살미매립지 사례연구 -)

  • Hong, Sang-Pyo;Kim, Kwang-Yul
    • Journal of Environmental Impact Assessment
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    • v.15 no.5
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    • pp.299-308
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    • 2006
  • To utilize a closed municipal solid waste landfill site in environmentally secure conditions, it is necessary to verify the stabilization level of landfill leachate. To assess leachate stabilization of an open-dumping municipal solid waste landfill site (Salmi Landfill) which is located at the vicinity of Chungju Reservoir which flows into Paldang Reservoir utilized as Seoul Metropolitan water supplies, the landfill history and surrounding characteristics of the landfill site were surveyed. In this investigation, waste, leachate, groundwater and surfacewater samples from this landfill were physically and chemically analyzed, and the analysis results were evaluated by 'The Criteria of Landfill Waste Stabilization (CLWS)', 'Discharge Criteria of Landfill Leachate', 'The Criteria of Domestic Use in Groundwater Quality', and 'The Criteria of Domestic Use in Surfacewater Quality' that promulgated by Korean Ministry of Environment. From the analysis results on the Salmi open-dumping landfill, C/N ratio was 18.9 and $BOD/COD_{Cr}$ ratios in leachate were higher than 1/10. Based on the CLWS, this results seemed to imply that the process of leachate stabilization at this landfill was still proceeding.

A Study on the Adequate Treatment of Municipal Landfill Leachate -A Case Study of Nanjido Landfill Leachate- (도시폐기물 매립지 침출수의 적정처리에 관한 연구 -난지도 폐기물 매립지 침출수를 대상으로-)

  • 이병인
    • Journal of Environmental Science International
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    • v.4 no.3
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    • pp.269-276
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    • 1995
  • An experimental research was conducted in order to study the treatability of municipal landfill leachate using a combined physio-chemical and biological treatment. The leachate was obtained from Nanjido landfill site in Seoul. Several sets of bench-scale sequencing batch reactor(SBR) and physic-chemical reactors were used as experimental apparatus. This experiment lasted for about 2 years. The results are as follows: 1. The characteristics of Nanjido landfill leachate were pH 7.4~8.2, BOD 79~450mg/L, COD 998~1460mg/L, $NH_3-N$ 1380~3412mg/L, 7-P 2.6~7.0mg/L, color 890~1992 unit, and heavy metals are a very small amount. 2. Either physio-chemical or biological treatment of Landfill leachate alone did not work well. So for the adequate treatment of leachate, it was necessary to deal with the physio-chemical pretreatment before biological treatment. And it was found that both electrolysis and ozone treatment are better pretreatments of leachate than others. 3. In this study, landfill leachate was effectively processed by two step : first by electrolysis pretreatment, and secondly by SBR treatment. Thus, the study showed considerable substrate removal of raw leachate, even though the rate of COD removal depended on HRT.

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Investigation of ground contamination and leachate leakage around waste landfill (폐기물매립지 주변 침출수 누출 및 지반오염 조사연구)

  • 정하익;김상근;정길수;이용수;조동행;강상구;지상근
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.309-312
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    • 1999
  • In recent years there has been a steady increase in geoenvironmental engineering projects where geotechnical engineering has been combined with environmental concerns. Many of these projects involve some investigation on contaminant and leachate flume in the ground and landfill. In this study, investigation on leachate around the waste landfill was carried out to detect the leaked and contaminated area. Many techniques such as geophysical, drilling and sampling method were applied. As a result of this study, the concentration of leachate and the point of leachate leaking around landfill were found out, and countermeasures for cut-off of leachate flow from landfill were investigated.

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A Study on the Pretreatment of Municipal Landfill Leachate by Electrolysis (전해처리에 의한 매립지 침출수의 전처리에 관한 연구)

  • 이병인;황순홍
    • Journal of Environmental Science International
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    • v.3 no.4
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    • pp.417-425
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    • 1994
  • Leachate from municipal landfill site is known to be hard to treat because it commonly contains various toxic material and heavy metals. In addition, portions of biodegradable organic substances in leachate are decreasing in the course of wastes stabilization, which is one of the critical reason for inefficient biological treatment at the end stage of landfill site operation. So this study was conducted to examine the feasibility of municipal lanuill leachate pretreatment using electrolysis. The optimum electrode combination was made. The optimum electrode combination was found to be lead and graphite.

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Investigation on Leachate Leakage Around Waste Landfill (폐기물매립지 주변 침출수 누출조사)

  • 정하익;김상근;정길수;진현식;조동행;이창열
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.69-72
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    • 1999
  • Now there has been a steady increase in the field of geoenvironmental engineering projects where geotechnical engineering has been combined with environmental concerns. Many of these projects involve some investigation on leachate flume in the waste landfill. In this study, investigation on leachate around the waste landfill was carried out to detect the leachate leaking area. Many techniques such as geophysical, drilling and sampling method were applied. As a result of this investigation, the concentration of leachate and the point of leachate leaking around landfill were analysed.

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Remediation capabilities of pilot-scale wetlands planted with Typha aungstifolia and Acorus calamus to treat landfill leachate

  • Bhagwat, Rohit V.;Boralkar, Dilip B.;Chavhan, Ram D.
    • Journal of Ecology and Environment
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    • v.42 no.4
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    • pp.191-198
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    • 2018
  • Improper management and unsanitary approaches are implemented in disposal of leachate, which has resulted in groundwater pollution at village Uruli Devachi, Pune, India. Various physico-chemical treatment methods are commercially available for leachate treatment. However, the application of biological methods viz. phytoremediation to the municipal solid waste landfill leachate has been limited. We report the remediation ability of Typha aungstifolia and Acrorus calamus that is capable of reducing hazardous constituents from the landfill leachate. After 96 h of hydraulic retention time (HRT), it was observed that T. aungstifolia-treated sample showed high reduction potential in reducing biochemical oxygen demand, chemical oxygen demand, hardness, total dissolved solids, Na, Mg, Ca and Ni whereas A. calamus showed greater reduction capacity for alkalinity, Cl, Cu, Zn and Cr. Furthermore, it was also observed that T. aungstifolia withstood longer HRT than A. calamus. In situ application of T. aungstifolia and A. calamus for remediation of landfill leachate carries a tremendous potential that needs to be further explored.

Treatment of Leachate from Municipal Landfill and Industrial Landfill by PAC Adsorption-Coagulation (분말활성탄 접촉-응집에 의한 생활폐기물 및 산업폐기물 매립지 침출수의 처리)

  • Kim, SooYoung;Chang, Duk;Kim, Young Tae
    • Journal of Korean Society of Water and Wastewater
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    • v.11 no.4
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    • pp.110-117
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    • 1997
  • Performances of combined adsorption and coagulation were evaluated as one of the options for pre-treatment or post-treatment of MSW landfills leachate and industrial landfill leachate. The COD and color removals of leachate from an old MSW landfill were 35% and 33% at an alum dose of 300mg/L with preceding PAC(powdered activated carbon) dose of 200mg/L, respectively. The COD and color removals of leachate from an young MSW landfill were 58% and 25% at an alum dose of 700mg/L and PAC dose of 500mg/L, respectively. The COD and color of biologically treated leachate from an industrial waste landfill were removed up to 32% and 68%, respectively, with pH control at addition of 500mgAlum/L and 1,000mgPAC/L. Adsorption and coagulation process with pH control showed better COD and color removals than the process without pH control for biologically treated leachate from an industrial waste landfill. The color removal was influenced greatly by pH control, while COD removal was not significant. No difference in removal efficiency was observed between adsorption-coagulation and coagulation-adsorption process. The COD removal was accomplished mainly by adsorption, while coagulation was a key mechanism of color removal. However, the mechanism of COD removal was obscure, when BOD/COD ratio was high. Maximum net increases in COD and color removals by the adsorption-coagulation process were respectively 45% and 46% compared with the unit process of adsorption or coagulation, although those removals depended on leachate characteristics. Thus, adsorption-coagulation process was considered to be effective for pre- and post-treatment of landfill leachate, and has distinct features of simple, flexible, stable and reliable operation against fluctuation leachate quality and flowrate.

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A Study on the Leachate Distribution of the Mooreung Landfill Site with Electrical Resistivity Surveys (전기비저항 탐사를 이용한 충주 무릉매립장 침출수 분포에 관한 연구)

  • Kim, Jun-Kyoung
    • The Journal of Engineering Geology
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    • v.16 no.4
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    • pp.455-463
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    • 2006
  • The electrical resistivity prospecting method with dipole-dipole array was applied to the Mooreung landfill site in order to survey the existence of leachate around the landfill site. Moreover, if there is leachate within Mooreung landfill site, the analysis of potential pathways to exterior environments was tried. Within the landfill site, the over-all characteristics of the electrical resistivity anomalies suggest that the leachate induced from the landfill materials has infiltrated the basement rock and fill the pores of basement rock in some parts of the landfill site. The consistency of the anomaly locations (left part of each survey line), anomaly geometries, and absolute resistivity value of anomaly through the 3 survey lines suggests that the resistivity anomaly be connected from the upstream to the downstream and correspond to the leachate material. Finally, the result from the electrical resistivity survey line near the gateway of the landfill site suggests that some of the leachate induced from landfill material leaks to the exterior groundwater system. It is necessary that more surveys using both geochemical and geophysical methods should be performed to find out potential pathways and depths of the leachate more precisely.

Electrical Surveys for Mapping Leachate in Nanji - Do Landfill Site (난지도 일대의 침출수 양태 조사를 위한 전기 비저항 탐사)

  • 김형수;이기화;한정상
    • The Journal of Engineering Geology
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    • v.5 no.3
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    • pp.259-276
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    • 1995
  • Electrical soundings and profilings were conducted for mapping the leachate in the region of Nanji - Do Landfill site. The results of electrical surveys conducted in the landfill area show that the basal leachate is formed at the height about 30 m above the mean sea level and that there is abundant floating leachate over the basal leachate. The surveys conducted around the landfill reveal that the groundwater which may be contaminated by the leachate from the landfill flows to the Han River. The top of the basement rock in this area has been severely affected by polluted groundwater. The layer which is thoroughly saturated with leachate in this region has the very low resistivity value below 10 ohm - m and this low resistivity value indicates that the groundwater and geology are severely contaminated by the leachate and wastes of the landfill.

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