Afslutning af efterbehandling på deponeringsanlæg

Ole Hjelmar; Hans Jørgen Henriksen

Afslutning af efterbehandling på deponeringsanlæg

Department of Hydrology

Research output: Book/Report › Report (publicly available)

Abstract

This project aims to provide information that can support the determination of principles and
criteria for decisions on when the aftercare period for a landfill may be terminated, and it further aims to provide proposals for and requirements on methods for site-specific assessments of whether or not such criteria have been met, i.e. whether or not a given landfill can be regarded as no longer
constituting a risk to the local environment. An overall methodology for estimating the duration of the aftercare period or assessing whether it will be safe to end the aftercare under various
conditions have been developed. The study have focused only on the production, quality, leaking
and subsequent transport and effect of leachate in the environment, since the quality and quantity of leachate as a function of time are expected to be more critical with respect to achievement of endstatus (i.e. “final storage quality” when the aftercare can be stopped) than e.g. gas formation and geotechnical stability (with the execption of possible stability problems caused the the so-called
“bathtub effect”).
The report provides an overall description of landfilling as it is carried out currently in Denmark, including a brief overview of the various types of waste and various types of classes of landfill units and the associated acceptance criteria which are listed in Statutory Order No. 1049/2013 on
Landfilling of Waste.

Original language	Danish
Place of Publication	København
Publisher	Miljøstyrelsen
Number of pages	78
ISBN (Print)	978-87-93352-39-1
Publication status	Published - 23 Jun 2015

Publication series

Series	Miljøprojekt
Number	1726
Volume	2015

Keywords

aftercare period
Landfill leachate
solute transport
groundwater
unsaturated zone
saturated zone
modelling
monitoring

Programme Area

Programme Area 2: Water Resources

Access to Document

https://mst.dk/service/publikationer/publikationsarkiv/2015/jun/afslutning-af-efterbehandlingen-paa-deponeringsanlaeg/Licence: Unspecified

Cite this

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title = "Afslutning af efterbehandling p{\aa} deponeringsanl{\ae}g",

abstract = "N{\aa}r et deponeringsanl{\ae}g nedlukkes, vil der i en periode stadig skulle opsamles perkolat, som skal h{\aa}ndteres, indtil den ansvarlige myndighed vurderer, at anl{\ae}gget ikke l{\ae}ngere vil kunne udg{\o}re en risiko for uacceptabel p{\aa}virkning af omgivelserne. Denne periode kaldes efterbehandlingsperioden.Rapporten redeg{\o}r for fastl{\ae}ggelse af principper og kriterier for, hvorn{\aa}r efterbehandlingsperioden kan anses for afsluttet. Der gives forslag til lokalitetsspecifikke unders{\o}gelser af, om kriterierne kan siges at v{\ae}re opfyldt, dvs. om deponeringsanl{\ae}g kan siges ikke l{\ae}ngere at udg{\o}re en fare for det omgivende milj{\o}. Endelig er der opstillet en overordnet metodologi til estimering af varigheden af efterbehandlingsperioden under forskellige foruds{\ae}tninger.",

keywords = "aftercare period, Landfill leachate, solute transport, groundwater, unsaturated zone, saturated zone, modelling, monitoring",

author = "Ole Hjelmar and Henriksen, {Hans J{\o}rgen}",

note = "A number of challenges that have to be overcome as part of assessing the duration of the aftercare and the determination of whether or not aftercare can be terminated have been identified. Some of the challenges are caused by the fact that some of the pre-conditions upon which the calculation of the leaching-based criteria for waste to accepted at landfills for inert, mineral and hazardous waste have not been fully reflected in the Statutory Order No. 1045/2013. The overall conditions with regards to the character of the source term and the effect on downstream groundwater and surface water that must be fulfilled before the aftercare can be stopped are discussed, and it is concluded that the risk assessment that must be carried out to determine if this can happen, should be based on a description/calculation of the flux of relevant substances out of the landfill after leachate collection and removal has been stopped. It is noted that the establishment of a new hydraulic equilibrium after the removal of leachate has been stopped may lead to a substantial increase of the leachate level within the landfill (“the bathtub effect”), which in turn may give rise to increased leaching of potential contaminants and geotechnical instability. An overall evaluation methodology is proposed which includes a risk assessment that combines models/descriptions of the source, transport and effect in the environment (the receptor at the point of compliance, POC). As far as the transport is concerned, it appears possible to apply a stepwise procedure where the starting point is a relatively simple model based on conservative assumptions (“worst case”), and if the result is positive, further modeling may not be required.",

year = "2015",

month = jun,

day = "23",

language = "Dansk",

isbn = "978-87-93352-39-1",

series = "Milj{\o}projekt",

number = "1726",

publisher = "Milj{\o}styrelsen",

}

TY - BOOK

T1 - Afslutning af efterbehandling på deponeringsanlæg

AU - Hjelmar, Ole

AU - Henriksen, Hans Jørgen

N1 - A number of challenges that have to be overcome as part of assessing the duration of the aftercare and the determination of whether or not aftercare can be terminated have been identified. Some of the challenges are caused by the fact that some of the pre-conditions upon which the calculation of the leaching-based criteria for waste to accepted at landfills for inert, mineral and hazardous waste have not been fully reflected in the Statutory Order No. 1045/2013. The overall conditions with regards to the character of the source term and the effect on downstream groundwater and surface water that must be fulfilled before the aftercare can be stopped are discussed, and it is concluded that the risk assessment that must be carried out to determine if this can happen, should be based on a description/calculation of the flux of relevant substances out of the landfill after leachate collection and removal has been stopped. It is noted that the establishment of a new hydraulic equilibrium after the removal of leachate has been stopped may lead to a substantial increase of the leachate level within the landfill (“the bathtub effect”), which in turn may give rise to increased leaching of potential contaminants and geotechnical instability. An overall evaluation methodology is proposed which includes a risk assessment that combines models/descriptions of the source, transport and effect in the environment (the receptor at the point of compliance, POC). As far as the transport is concerned, it appears possible to apply a stepwise procedure where the starting point is a relatively simple model based on conservative assumptions (“worst case”), and if the result is positive, further modeling may not be required.

PY - 2015/6/23

Y1 - 2015/6/23

N2 - Når et deponeringsanlæg nedlukkes, vil der i en periode stadig skulle opsamles perkolat, som skal håndteres, indtil den ansvarlige myndighed vurderer, at anlægget ikke længere vil kunne udgøre en risiko for uacceptabel påvirkning af omgivelserne. Denne periode kaldes efterbehandlingsperioden.Rapporten redegør for fastlæggelse af principper og kriterier for, hvornår efterbehandlingsperioden kan anses for afsluttet. Der gives forslag til lokalitetsspecifikke undersøgelser af, om kriterierne kan siges at være opfyldt, dvs. om deponeringsanlæg kan siges ikke længere at udgøre en fare for det omgivende miljø. Endelig er der opstillet en overordnet metodologi til estimering af varigheden af efterbehandlingsperioden under forskellige forudsætninger.

AB - Når et deponeringsanlæg nedlukkes, vil der i en periode stadig skulle opsamles perkolat, som skal håndteres, indtil den ansvarlige myndighed vurderer, at anlægget ikke længere vil kunne udgøre en risiko for uacceptabel påvirkning af omgivelserne. Denne periode kaldes efterbehandlingsperioden.Rapporten redegør for fastlæggelse af principper og kriterier for, hvornår efterbehandlingsperioden kan anses for afsluttet. Der gives forslag til lokalitetsspecifikke undersøgelser af, om kriterierne kan siges at være opfyldt, dvs. om deponeringsanlæg kan siges ikke længere at udgøre en fare for det omgivende miljø. Endelig er der opstillet en overordnet metodologi til estimering af varigheden af efterbehandlingsperioden under forskellige forudsætninger.

KW - aftercare period

KW - Landfill leachate

KW - solute transport

KW - groundwater

KW - unsaturated zone

KW - saturated zone

KW - modelling

KW - monitoring

M3 - Rapport (offentligt tilgængelig)

SN - 978-87-93352-39-1

T3 - Miljøprojekt

BT - Afslutning af efterbehandling på deponeringsanlæg

PB - Miljøstyrelsen

CY - København

ER -

Afslutning af efterbehandling på deponeringsanlæg

Abstract

Publication series

Keywords

Programme Area

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