Afslutning af efterbehandling på deponeringsanlæg.

O. Hjelmar; H.J. Henriksen

Afslutning af efterbehandling på deponeringsanlæg.

GEUS

Publikation: Bog/rapport › Rapport (offentligt tilgængelig)

Abstrakt

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.

Originalsprog	Engelsk
Forlag	Miljøstyrelsen
Antal sider	78
Status	Udgivet - 2015

Publikationsserier

Navn	Miljøstyrelsen, Miljøprojekter
Nr.	1726
Vol/bind	2015

Programområde

Programområde 2: Vandressourcer

Citationsformater

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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.",

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

author = "O. Hjelmar and H.J. Henriksen",

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",

language = "English",

series = "Milj{\o}styrelsen, Milj{\o}projekter",

publisher = "Milj{\o}styrelsen",

number = "1726",

}

TY - BOOK

T1 - Afslutning af efterbehandling på deponeringsanlæg.

AU - Hjelmar, O.

AU - Henriksen, H.J.

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

Y1 - 2015

N2 - 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.

AB - 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.

KW - aftercare period

KW - Landfill leachate

KW - solute transport

KW - groundwater

KW - unsaturated zone

KW - saturated zone

KW - modelling

KW - monitoring

M3 - Report (publicly available)

T3 - Miljøstyrelsen, Miljøprojekter

BT - Afslutning af efterbehandling på deponeringsanlæg.

PB - Miljøstyrelsen

ER -

Afslutning af efterbehandling på deponeringsanlæg.

Abstrakt

Publikationsserier

Programområde

Fingeraftryk

Citationsformater