Leachate modeling for a municipal solid waste landfill for upper expansion

Min, Jee-Eun; Kim, Mee-Jeong; Kim, Jae Young; Park, Insun; Park, Jae-Woo

doi:10.1007/s12205-010-0473-1

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…Leachate generation can be also effectively predicted using numerical modeling techniques (Grugnaletti et al 2016). As reported by Min et al (2010), numerical modeling is especially efficient when determining parameters of engineering liners, leachate collection systems, surface slope, and subsurface drainage. The most commonly used models in the hydrological evaluation of landfills are UNSAT-H (Fayer 2000), HYDRUS-1D (Šimůnek et al 2005), and HELP (Schroeder et al 1994).…”

Section: Water Balance Methodsmentioning

confidence: 99%

Modeling leachate generation: practical scenarios for municipal solid waste landfills in Poland

Podlasek

2022

Environ Sci Pollut Res

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The idea of water balance calculations within the landfill is to determine the distribution of water input and output, and finally the volume of leachate generated. The scope of this data is essential for rational planning of water and wastewater management, and designing leachate drainage network and leachate treatment systems. The aim of this study was to assess the possible amounts of leachate generation regarding ten different scenarios of landfill sealing systems. The calculations were performed using the Hydrologic Evaluation of Landfill Performance (HELP) model. It was revealed that the greatest share among the components of water balance in the landfill has precipitation (on average 509 mm in the 5-year period of simulation), together with evapotranspiration (on average 391 mm in the 5-year period of simulation). The study shows that the minimum amount of leachate (797–803 m3/year) occurs when the best placement quality (=5) is regarded for the geomembrane installed in the bottom of the landfill. The maximum leachate generation (830 m3/year) was found for those scenarios in which only three layers of bottom sealing systems were adopted, with the worst placement quality (=1) assigned to geomembranes. The results of this study confirm that the application of multilayer sealing systems has visible impact on the reduction of leachate generation of around 33 m3/year.

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Section: Water Balance Methodsmentioning

confidence: 99%

Modeling leachate generation: practical scenarios for municipal solid waste landfills in Poland

Podlasek

2022

Environ Sci Pollut Res

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“…It is difficult to manage leachate drainage only by the guide and drainage system at the bottom of a landfill. It must be ensured that leachate drainage facilities can be continuously drained after the closure of the landfill [31]. Leachate drainage facilities could also be built in the landfill body to reduce the leachate level so that the existing landfill can meet the expansion stability requirements.…”

Section: Introductionmentioning

confidence: 99%

Vertical Expansion Stability of an Existing Landfill: A Case Study of a Landfill in Xi’an, China

Shen

Ren

Huang

et al. 2021

Advances in Civil Engineering

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The vertical expansion of existing landfills can hold significant amounts of domestic waste and solve practical difficulties such as local government site selection. This research topic has become increasingly popular in the field of environmental geotechnical engineering. This study examined vertical expansion stability of landfills considering high leachate water level. The results showed the following. (1) Four slope instability modes for landfill vertical expansion are categorized according to the following slip surface positions: shallow slippage of the existing landfill, shallow slippage of the expanding landfill, interface slip between the existing landfill and expanding landfill, and deep slippage passes through the foundation soil. (2) The factor of safety decreases as the height of leachate level increases. When the height of leachate level rises from 2 m to 20 m, the factor of safety of the landfill is reduced by 13.2–15.4%. (3) As the vertical expansion height increases, the factor of safety of the existing landfill decreases, and when the expansion height increases to 30 m, the stability factor of safety of the old waste landfill is reduced by 4.83%. A landfill in Xi’an is considered as an example for the analysis, which shows that a leachate drainage layer can discharge leachate from the landfill body efficiently, reduce the leachate level height of the landfill body, and improve the stability of vertical expansion of the landfill. This study and its findings can be used as a reference for similar expansion projects.

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“…In Latin American countries, landfills are the most common final destination for MSW [4]. One of the most significant environmental problems associated with this type of facility corresponds to the liquid waste generated during its operation and closure [5,6]. Leachate has become one of the main challenges of liquid waste treatment engineering, due to its high polluting loads (e.g., organic matter and heavy metals), and therefore it stands out as one of the areas of greatest interest during landfill management [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Landfill Leachate Treatment System Using Arima Models: A Case Study in a Megacity

2021

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Leachate has been reported as the most significant source of landfill pollution. Predicting the characteristics of untreated and treated leachate may be useful during optimal scheduling of leachate treatment systems. The objective of this paper is to show an analysis of the operation of a landfill leachate treatment system in a Latin American megacity (Bogota, Colombia) by means of auto-regressive integrated moving average (ARIMA) models. A comparative analysis of the leachate treated with respect to reference legislation is carried out. The influence of climate variables during the operation of the treatment system is also considered. The results suggest that the concentrations of heavy metals (HMs), BOD5, and COD in untreated leachate do not follow the same annual cycles observed for the quantity of solid waste disposed within the landfill. This difference is possibly associated with the hydraulic retention time (HRT) of the leachate inside the conduction and pre-treatment system (storage/homogenization ponds). The ARIMA analysis suggests an HRT of up to one month (AR = 1) for the HMs identified as indicators of untreated leachate (Cu, Pb, and Zn). It is noted that the removal efficiency of HM indicators of the operation of the leachate treatment plant (Fe and Ni) is probably conditioned by operations carried out over a period of one month (AR = 1). The high input concentration of these HM indicators may prevent changing their ARIMA temporal structure during leachate treatment. This is reflected in the low removal efficiencies for all HMs under study (average = 26.1%).

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Leachate modeling for a municipal solid waste landfill for upper expansion

Cited by 11 publications

References 7 publications

Modeling leachate generation: practical scenarios for municipal solid waste landfills in Poland

Modeling leachate generation: practical scenarios for municipal solid waste landfills in Poland

Vertical Expansion Stability of an Existing Landfill: A Case Study of a Landfill in Xi’an, China

Analysis of the Landfill Leachate Treatment System Using Arima Models: A Case Study in a Megacity

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