Gas production, composition and emission at a modern disposal site receiving waste with a low-organic content

Charlotte Scheutz, Anders Michael Fredenslund, Jonas Nedenskov, Jerker Samuelsson, Peter Kjeldsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

AV Miljø is a modern waste disposal site receiving non-combustible waste with a low-organic content. The objective of the current project was to determine the gas generation, composition, emission, and oxidation in top covers on selected waste cells as well as the total methane (CH4) emission from the disposal site. The investigations focused particularly on three waste disposal cells containing shredder waste (cell 1.5.1), mixed industrial waste (cell 2.2.2), and mixed combustible waste (cell 1.3). Laboratory waste incubation experiments as well as gas modeling showed that significant gas generation was occurring in all three cells. Field analysis showed that the gas generated in the cell with mixed combustible waste consisted of mainly CH4 (70%) and carbon dioxide (CO2) (29%) whereas the gas generated within the shredder waste, primarily consisted of CH4 (27%) and nitrogen (N2) (71%), containing no CO2. The results indicated that the gas composition in the shredder waste was governed by chemical reactions as well as microbial reactions. CH4 mass balances from three individual waste cells showed that a significant part (between 15% and 67%) of the CH4 generated in cell 1.3 and 2.2.2 was emitted through leachate collection wells, as a result of the relatively impermeable covers in place at these two cells preventing vertical migration of the gas. At cell 1.5.1, which is un-covered, the CH4 emission through the leachate system was low due to the high gas permeability of the shredder waste. Instead the gas was emitted through the waste resulting in some hotspot observations on the shredder surface with higher emission rates. The remaining gas that was not emitted through surfaces or the leachate collection system could potentially be oxidized as the measured oxidation capacity exceeded the potential emission rate. The whole CH4 emission from the disposal site was found to be 820±202kgCH4d−1. The total emission rate through the leachate collection system at AV Miljø was found to be 211kgCH4d−1. This showed that approximately ¼ of the emitted gas was emitted through the leachate collections system making the leachate collection system an important source controlling the overall gas migration from the site. The emission pathway for the remaining part of the gas was more uncertain, but emission from open cells where waste is being disposed of or being excavated for incineration, or from horizontal leachate drainage pipes placed in permeable gravel layers in the bottom of empty cells was likely.
OriginalsprogEngelsk
TidsskriftWaste Management
Vol/bind31
Udgave nummer5
Sider (fra-til)946-955
ISSN0956-053X
DOI
StatusUdgivet - 2011
Udgivet eksterntJa

Citer dette

Scheutz, Charlotte ; Fredenslund, Anders Michael ; Nedenskov, Jonas ; Samuelsson, Jerker ; Kjeldsen, Peter. / Gas production, composition and emission at a modern disposal site receiving waste with a low-organic content. I: Waste Management. 2011 ; Bind 31, Nr. 5. s. 946-955.
@article{593d521d55814c03813f0c860c7cc9b2,
title = "Gas production, composition and emission at a modern disposal site receiving waste with a low-organic content",
abstract = "AV Milj{\o} is a modern waste disposal site receiving non-combustible waste with a low-organic content. The objective of the current project was to determine the gas generation, composition, emission, and oxidation in top covers on selected waste cells as well as the total methane (CH4) emission from the disposal site. The investigations focused particularly on three waste disposal cells containing shredder waste (cell 1.5.1), mixed industrial waste (cell 2.2.2), and mixed combustible waste (cell 1.3). Laboratory waste incubation experiments as well as gas modeling showed that significant gas generation was occurring in all three cells. Field analysis showed that the gas generated in the cell with mixed combustible waste consisted of mainly CH4 (70{\%}) and carbon dioxide (CO2) (29{\%}) whereas the gas generated within the shredder waste, primarily consisted of CH4 (27{\%}) and nitrogen (N2) (71{\%}), containing no CO2. The results indicated that the gas composition in the shredder waste was governed by chemical reactions as well as microbial reactions. CH4 mass balances from three individual waste cells showed that a significant part (between 15{\%} and 67{\%}) of the CH4 generated in cell 1.3 and 2.2.2 was emitted through leachate collection wells, as a result of the relatively impermeable covers in place at these two cells preventing vertical migration of the gas. At cell 1.5.1, which is un-covered, the CH4 emission through the leachate system was low due to the high gas permeability of the shredder waste. Instead the gas was emitted through the waste resulting in some hotspot observations on the shredder surface with higher emission rates. The remaining gas that was not emitted through surfaces or the leachate collection system could potentially be oxidized as the measured oxidation capacity exceeded the potential emission rate. The whole CH4 emission from the disposal site was found to be 820±202kgCH4d−1. The total emission rate through the leachate collection system at AV Milj{\o} was found to be 211kgCH4d−1. This showed that approximately ¼ of the emitted gas was emitted through the leachate collections system making the leachate collection system an important source controlling the overall gas migration from the site. The emission pathway for the remaining part of the gas was more uncertain, but emission from open cells where waste is being disposed of or being excavated for incineration, or from horizontal leachate drainage pipes placed in permeable gravel layers in the bottom of empty cells was likely.",
author = "Charlotte Scheutz and Fredenslund, {Anders Michael} and Jonas Nedenskov and Jerker Samuelsson and Peter Kjeldsen",
year = "2011",
doi = "10.1016/j.wasman.2010.10.021",
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Gas production, composition and emission at a modern disposal site receiving waste with a low-organic content. / Scheutz, Charlotte; Fredenslund, Anders Michael; Nedenskov, Jonas; Samuelsson, Jerker; Kjeldsen, Peter.

I: Waste Management, Bind 31, Nr. 5, 2011, s. 946-955.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Gas production, composition and emission at a modern disposal site receiving waste with a low-organic content

AU - Scheutz, Charlotte

AU - Fredenslund, Anders Michael

AU - Nedenskov, Jonas

AU - Samuelsson, Jerker

AU - Kjeldsen, Peter

PY - 2011

Y1 - 2011

N2 - AV Miljø is a modern waste disposal site receiving non-combustible waste with a low-organic content. The objective of the current project was to determine the gas generation, composition, emission, and oxidation in top covers on selected waste cells as well as the total methane (CH4) emission from the disposal site. The investigations focused particularly on three waste disposal cells containing shredder waste (cell 1.5.1), mixed industrial waste (cell 2.2.2), and mixed combustible waste (cell 1.3). Laboratory waste incubation experiments as well as gas modeling showed that significant gas generation was occurring in all three cells. Field analysis showed that the gas generated in the cell with mixed combustible waste consisted of mainly CH4 (70%) and carbon dioxide (CO2) (29%) whereas the gas generated within the shredder waste, primarily consisted of CH4 (27%) and nitrogen (N2) (71%), containing no CO2. The results indicated that the gas composition in the shredder waste was governed by chemical reactions as well as microbial reactions. CH4 mass balances from three individual waste cells showed that a significant part (between 15% and 67%) of the CH4 generated in cell 1.3 and 2.2.2 was emitted through leachate collection wells, as a result of the relatively impermeable covers in place at these two cells preventing vertical migration of the gas. At cell 1.5.1, which is un-covered, the CH4 emission through the leachate system was low due to the high gas permeability of the shredder waste. Instead the gas was emitted through the waste resulting in some hotspot observations on the shredder surface with higher emission rates. The remaining gas that was not emitted through surfaces or the leachate collection system could potentially be oxidized as the measured oxidation capacity exceeded the potential emission rate. The whole CH4 emission from the disposal site was found to be 820±202kgCH4d−1. The total emission rate through the leachate collection system at AV Miljø was found to be 211kgCH4d−1. This showed that approximately ¼ of the emitted gas was emitted through the leachate collections system making the leachate collection system an important source controlling the overall gas migration from the site. The emission pathway for the remaining part of the gas was more uncertain, but emission from open cells where waste is being disposed of or being excavated for incineration, or from horizontal leachate drainage pipes placed in permeable gravel layers in the bottom of empty cells was likely.

AB - AV Miljø is a modern waste disposal site receiving non-combustible waste with a low-organic content. The objective of the current project was to determine the gas generation, composition, emission, and oxidation in top covers on selected waste cells as well as the total methane (CH4) emission from the disposal site. The investigations focused particularly on three waste disposal cells containing shredder waste (cell 1.5.1), mixed industrial waste (cell 2.2.2), and mixed combustible waste (cell 1.3). Laboratory waste incubation experiments as well as gas modeling showed that significant gas generation was occurring in all three cells. Field analysis showed that the gas generated in the cell with mixed combustible waste consisted of mainly CH4 (70%) and carbon dioxide (CO2) (29%) whereas the gas generated within the shredder waste, primarily consisted of CH4 (27%) and nitrogen (N2) (71%), containing no CO2. The results indicated that the gas composition in the shredder waste was governed by chemical reactions as well as microbial reactions. CH4 mass balances from three individual waste cells showed that a significant part (between 15% and 67%) of the CH4 generated in cell 1.3 and 2.2.2 was emitted through leachate collection wells, as a result of the relatively impermeable covers in place at these two cells preventing vertical migration of the gas. At cell 1.5.1, which is un-covered, the CH4 emission through the leachate system was low due to the high gas permeability of the shredder waste. Instead the gas was emitted through the waste resulting in some hotspot observations on the shredder surface with higher emission rates. The remaining gas that was not emitted through surfaces or the leachate collection system could potentially be oxidized as the measured oxidation capacity exceeded the potential emission rate. The whole CH4 emission from the disposal site was found to be 820±202kgCH4d−1. The total emission rate through the leachate collection system at AV Miljø was found to be 211kgCH4d−1. This showed that approximately ¼ of the emitted gas was emitted through the leachate collections system making the leachate collection system an important source controlling the overall gas migration from the site. The emission pathway for the remaining part of the gas was more uncertain, but emission from open cells where waste is being disposed of or being excavated for incineration, or from horizontal leachate drainage pipes placed in permeable gravel layers in the bottom of empty cells was likely.

U2 - 10.1016/j.wasman.2010.10.021

DO - 10.1016/j.wasman.2010.10.021

M3 - Journal article

VL - 31

SP - 946

EP - 955

JO - Waste Management

JF - Waste Management

SN - 0956-053X

IS - 5

ER -