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Installation of a vadose zone monitoring system for tracer testing in a municipal solid waste landfill subject to leachate recirculation

Installation of a vadose zone monitoring system for tracer testing in a municipal solid waste landfill subject to leachate recirculation
Installation of a vadose zone monitoring system for tracer testing in a municipal solid waste landfill subject to leachate recirculation
The Dutch sustainable landfill management experiment (RIVM, 2014) being carried out in the Netherlands is attempting to reduce landfill aftercare periods by developing new approaches to post-closure management. One approach being piloted at the de Kragge landfill (Netherlands) to rapidly improve leachate quality is accelerated leachate recirculation and flushing.
Due to the highly heterogeneous nature and structure of waste, the manner in which the contaminant load of a landfill will be removed during flushing is poorly understood. Leachate flow paths may result in isolated volumes of waste in which the removal of contaminants is controlled and limited by diffusion processes. To develop an accurate assessment of the efficiency of treatment clean up processes, a better understanding of leachate flow paths and unflushed zones is therefore needed.
A novel vadose zone monitoring system (VMS) was adapted and installed at de Kragge landfill to enable the monitoring of changes in leachate solutes and tracer concentrations. Two VMS monitoring sleeves were installed in inclined wells in the landfill; each sleeve contained two arrays of ten contiguously located samplers which allowed monitoring at 0.4m depth intervals. Following installation, the VMS was used to monitor the temporal and spatial distribution of a fluorescent organic tracer, sodium fluorescein, injected at the surface of the landfill.
The VMS system has not been previously used in a tracer test in landfill. This paper therefore focuses on a detailed description of the VMS system used in this study, the installation of the VMS sleeves, and lessons learned from the installation. An overview of the first year of tracer test results and leachate solute data will be discussed
Stringfellow, Anne
024efba8-7ffc-441e-a268-be43240990a9
Beaven, R.P.
5893d749-f03c-4c55-b9c9-e90f00a32b57
Rees-White, Tristan
852278dd-f628-4d98-a03a-a34fea8c75d6
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Kanen, Twan
41c2f4ed-6e1b-4f33-ab04-91e82a3189e2
Stringfellow, Anne
024efba8-7ffc-441e-a268-be43240990a9
Beaven, R.P.
5893d749-f03c-4c55-b9c9-e90f00a32b57
Rees-White, Tristan
852278dd-f628-4d98-a03a-a34fea8c75d6
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Kanen, Twan
41c2f4ed-6e1b-4f33-ab04-91e82a3189e2

Stringfellow, Anne, Beaven, R.P., Rees-White, Tristan, Smethurst, Joel, Powrie, William and Kanen, Twan (2023) Installation of a vadose zone monitoring system for tracer testing in a municipal solid waste landfill subject to leachate recirculation. Sardinia 2023: 19th International Symposium on Waste Management, Resource Recovery and Sustainable Landfilling. 09 - 13 Oct 2023. 10 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

The Dutch sustainable landfill management experiment (RIVM, 2014) being carried out in the Netherlands is attempting to reduce landfill aftercare periods by developing new approaches to post-closure management. One approach being piloted at the de Kragge landfill (Netherlands) to rapidly improve leachate quality is accelerated leachate recirculation and flushing.
Due to the highly heterogeneous nature and structure of waste, the manner in which the contaminant load of a landfill will be removed during flushing is poorly understood. Leachate flow paths may result in isolated volumes of waste in which the removal of contaminants is controlled and limited by diffusion processes. To develop an accurate assessment of the efficiency of treatment clean up processes, a better understanding of leachate flow paths and unflushed zones is therefore needed.
A novel vadose zone monitoring system (VMS) was adapted and installed at de Kragge landfill to enable the monitoring of changes in leachate solutes and tracer concentrations. Two VMS monitoring sleeves were installed in inclined wells in the landfill; each sleeve contained two arrays of ten contiguously located samplers which allowed monitoring at 0.4m depth intervals. Following installation, the VMS was used to monitor the temporal and spatial distribution of a fluorescent organic tracer, sodium fluorescein, injected at the surface of the landfill.
The VMS system has not been previously used in a tracer test in landfill. This paper therefore focuses on a detailed description of the VMS system used in this study, the installation of the VMS sleeves, and lessons learned from the installation. An overview of the first year of tracer test results and leachate solute data will be discussed

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More information

Published date: 9 October 2023
Venue - Dates: Sardinia 2023: 19th International Symposium on Waste Management, Resource Recovery and Sustainable Landfilling, 2023-10-09 - 2023-10-13

Identifiers

Local EPrints ID: 491161
URI: http://eprints.soton.ac.uk/id/eprint/491161
PURE UUID: 0e38236b-71e9-4926-96c2-e2f6a7ca3c60
ORCID for Anne Stringfellow: ORCID iD orcid.org/0000-0002-8873-0010
ORCID for R.P. Beaven: ORCID iD orcid.org/0000-0002-1387-8299
ORCID for Tristan Rees-White: ORCID iD orcid.org/0000-0001-9009-8432
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 13 Jun 2024 17:05
Last modified: 15 Jun 2024 01:41

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Contributors

Author: R.P. Beaven ORCID iD
Author: Joel Smethurst
Author: William Powrie ORCID iD
Author: Twan Kanen

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