Modeling of Biodegradation in an Old Unregulated European Landfill

Lobo, Amaya; López, Armando; Cobo, Noelia

doi:10.1061/(asce)ee.1943-7870.0000292

Cited by 3 publications

(1 citation statement)

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“…A sanitary landfill is a specific bioreactor where factors such as the influence of aerobic and anaerobic conditions and the microorganisms present in the chemical, physical and biological processes determine the decomposition of the waste material (Lobo et al, 2011). Rainwater penetrates the waste and dissolves products in biochemical processes, which in the final stage leads to leachate formation (Caicedo and Quintero, 2006 ■ a waste disposal survey ■ investigation of the hydrogeological conditions of the landfill subsoil and its vicinity ■ a description of protected areas and structures (if any).…”

Section: Introductionmentioning

confidence: 99%

Bentonite cut-off walls: solution for landfill remedial works

Koda

Osinski

2017

Environmental Geotechnics

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2The application of landfill containment systems such as cut-off walls could be used effectively as one of the remedial solutions limiting environmental hazards caused by such sites. The complexity and weight of problems concerning remediation works of old sanitary landfills having been considered and interdisciplinary engineering and ecological solutions are recommended. This paper discusses threats to the environment emerging from old landfills and polluted areas and presents examples of engineering solutions used for the remediation of the old, large embankment-type Radiowo landfill located in Warsaw, Poland. The principal remediation problem for the Radiowo landfill was protection systems against leachate migration and groundwater pollution. The research included bentonite vertical barrier quality tests involving both laboratory and on-site hydraulic conductivity tests.Furthermore, a quality assessment based on the groundwater flow and transport modelling and an analysis of monitoring records are presented. The output of the research is the proposal of a dual device employing monitoring and numerical modelling processes for the purpose of controlling the self-purification of soil-water environments after the implementation of containment systems on contaminated sites.

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Section: Introductionmentioning

confidence: 99%

Bentonite cut-off walls: solution for landfill remedial works

Koda

Osinski

2017

Environmental Geotechnics

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Mathematical simulation to improve municipal solid waste leachate management: a closed landfill case

López

Calero

Lobo

2018

Environ Sci Pollut Res

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This article presents an example of the application of simulation tools to estimate the post-closure evolution of leachate in a non-hazardous waste landfill. The objective of this work is to predict the behavior of leachate after the closure of the landfill for use as basic information with which to design the leachate management strategy in the following years. The MODUELO 4.0 mathematical landfill simulation software package was used for this purpose. The results of the simulation show that the concentrations in the leachate increase during the post-closure period, from values close to 2200 mg/L of COD and 1500 mg/L of NH at the time of landfill closure to 3200 mg/L of COD and 5300 mg/L of NH 20 years later. This increase is mainly due to the reduction in the flows, from 105 to 17 m/day on average, since the surface lining was installed. Consequently, pollutant fluxes decrease to values below 100 kg/day in both COD and NH 3 months after closure. This evolution indicates that the management of this leachate will be simpler in the future, especially if it is co-treated with urban wastewater, as its contribution decreases. On the other hand, external water connections to the leachate collectors may cause a relevant increase in the volume of the global landfill effluent. Controlling runoff management and underground infiltrations could lead to important savings in leachate treatment during the aftercare phase.

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