Steady-state design of vertical wells for liquids addition at bioreactor landfills

Jain, Pradeep; Townsend, Timothy G.; Tolaymat, Thabet

doi:10.1016/j.wasman.2010.02.020

Cited by 50 publications

(37 citation statements)

References 16 publications

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“…In this study, the value of the saturated hydraulic conductivity of the municipal solid waste was used as a 1.0 × 10 −5 cm/sect instead of the default value within the HELP model of 1.0 × 10 −3 This is due to the recent research studies in this field [63,64], which argued that the waste is compacted as a result modern practices in situ [65,66]. The default hydraulic conductivity has led to high generation rates of leachate value, where this value of leachate does not represent the real value in the modern landfill [67].…”

Section: Compacted Waste Using the Scenariosmentioning

confidence: 99%

Two Scenarios for Landfills Design in Special Conditions Using the HELP Model: A Case Study in Babylon Governorate, Iraq

et al. 2018

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Abstract:The sound design of landfills is essential in order to protect human health and the environment (air, water, and soil). The study area, Babylon Governorate, is situated in the middle of Iraq, and is distinguished by a hot climate and shallow groundwater. The governorate did not have landfill sites that meet international criteria; in addition, the groundwater depth in Babylon Governorate is commonly shallow. Previously, the most important criteria for the study area and GIS software were used to select the best sites for locating landfills in the major cities of the governorate. In this study, the Hydrologic Evaluation of Landfill Performance (HELP 3.95D) model was applied in order to ensure that there was no leakage of the leachate that results from the waste in the selected landfill sites. It is the most commonly utilized model for landfill design, and it is used to estimate water inflow through the soil layers. For the present study, to avoid groundwater pollution by leachate from a landfill site due to the shallow groundwater depth, compacted waste was placed on the surface using two height scenarios (2 m and 4 m). This design was developed using the soil properties of the selected sites coupled with the weather parameters in Babylon Governorate (precipitation, temperature, solar, and evapotranspiration) for a 12-year period covering 2005 to 2016. The results from both of the suggested landfill designs showed an absence of leachate from the bottom liner.

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Section: Compacted Waste Using the Scenariosmentioning

confidence: 99%

Two Scenarios for Landfills Design in Special Conditions Using the HELP Model: A Case Study in Babylon Governorate, Iraq

et al. 2018

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“…Exchange of water between the matrix and the fracture pore systems is assumed to be proportional to the pressure head difference between both pore systems [24]: (12) in which, α w is a first-order mass transfer coefficient (L -1 T -1 ) for water defined as:…”

Section: Leachate Flow Modelmentioning

confidence: 99%

Effects of Bonded Tyres on Leachate Recirculation of Bioreactor Landfills

Zhang¹,

Heng²,

Jeng³

et al. 2017

TOCIEJ

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Introduction:In bioreactor landfills, leachate recirculation significantly influences the process of stabilization and the stability of slope. Method:To speed up the leachate recirculation and reduce its adverse impact on slope stability, this paper proposes a new method which constructs a spatial net consisted of bonded whole tyres in the municipal waste during landfilling. Results and Conclusion:In this study, a numerical two-permeability flow model was used to investigate the effects of tyres embedding on the outflow rate of leachate injection. Furthermore, it was coupled with momentum balance equations to determine the local factor of safety of slope stability. The established model was applied to a simplified bioreactor landfill. The simulation results demonstrated that the tyre net can accelerate the rate of leachate injection and contribute to distribute the liquid more uniformly. Meanwhile, the slope stability was improved due to the enforcement of waste in the presence of tyres.

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“…The temporal variation of flow and pressure for other wells is presented elsewhere (Jain, 2005). Based on the dimensionless variables and design charts developed by Jain et al (2010) for the design of a vertical well system, the liquids volume added to a well was analyzed as the number of well volumes and the flow rate was normalized with the liquid head in the well bottom and the screen length to generalize the results. The number of well volumes is the ratio of the actual volume added to the screened well section that is distributing flow to the surrounding waste mass.…”

Section: Leachate Addition Per Well Screen At Different Depthsmentioning

confidence: 99%

“…6 as the larger volumes were only achieved in a small number of good performing wells. Based on the dimensionless variables developed by Jain et al (2010), the fluid conductance is also equivalent to xK r , where x is defined as follows:…”

Section: Leachate Addition Per Well Screen At Different Depthsmentioning

confidence: 99%

Case study of landfill leachate recirculation using small-diameter vertical wells

Jain¹,

Ko²,

Kumar³

et al. 2014

Waste Management

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Steady-state design of vertical wells for liquids addition at bioreactor landfills

Cited by 50 publications

References 16 publications

Two Scenarios for Landfills Design in Special Conditions Using the HELP Model: A Case Study in Babylon Governorate, Iraq

Two Scenarios for Landfills Design in Special Conditions Using the HELP Model: A Case Study in Babylon Governorate, Iraq

Effects of Bonded Tyres on Leachate Recirculation of Bioreactor Landfills

Case study of landfill leachate recirculation using small-diameter vertical wells

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