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Effects of substrate induced respiration on the stability of bottom ash in landfill cover environment.

Ilyas, Aamir LU ; Lovat, E and Persson, Km (2014) In Waste Management & Research 32(12). p.1241-1246
Abstract
The municipal solid waste incineration bottom ash is being increasingly used to construct landfill covers in Sweden. In post-closure, owing to increased cover infiltration, the percolating water can add external organic matter to bottom ash. The addition and subsequent degradation of this external organic matter can affect metal mobility through complexation and change in redox conditions. However, the impacts of such external organic matter addition on bottom ash stability have not been fully evaluated yet. Therefore, the objective of this study was to evaluate the impact of external organic matter on bottom ash respiration and metal leaching. The samples of weathered bottom ash were mixed with oven dried and digested wastewater sludge... (More)
The municipal solid waste incineration bottom ash is being increasingly used to construct landfill covers in Sweden. In post-closure, owing to increased cover infiltration, the percolating water can add external organic matter to bottom ash. The addition and subsequent degradation of this external organic matter can affect metal mobility through complexation and change in redox conditions. However, the impacts of such external organic matter addition on bottom ash stability have not been fully evaluated yet. Therefore, the objective of this study was to evaluate the impact of external organic matter on bottom ash respiration and metal leaching. The samples of weathered bottom ash were mixed with oven dried and digested wastewater sludge (1%-5% by weight). The aerobic respiration activity (AT4), as well as the leaching of metals, was tested with the help of respiration and batch leaching tests. The respiration and heavy metal leaching increased linearly with the external organic matter addition. Based on the results, it was concluded that the external organic matter addition would negatively affect the quality of landfill cover drainage. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Waste Management & Research
volume
32
issue
12
pages
1241 - 1246
publisher
SAGE Publications Inc.
external identifiers
  • pmid:25395160
  • wos:000345762100013
  • scopus:84914102406
ISSN
1096-3669
DOI
10.1177/0734242X14555804
language
English
LU publication?
yes
id
1be286f1-b50f-4747-aa96-1b41f8d4736e (old id 4816740)
date added to LUP
2014-12-11 12:30:41
date last changed
2017-11-05 03:03:43
@article{1be286f1-b50f-4747-aa96-1b41f8d4736e,
  abstract     = {The municipal solid waste incineration bottom ash is being increasingly used to construct landfill covers in Sweden. In post-closure, owing to increased cover infiltration, the percolating water can add external organic matter to bottom ash. The addition and subsequent degradation of this external organic matter can affect metal mobility through complexation and change in redox conditions. However, the impacts of such external organic matter addition on bottom ash stability have not been fully evaluated yet. Therefore, the objective of this study was to evaluate the impact of external organic matter on bottom ash respiration and metal leaching. The samples of weathered bottom ash were mixed with oven dried and digested wastewater sludge (1%-5% by weight). The aerobic respiration activity (AT4), as well as the leaching of metals, was tested with the help of respiration and batch leaching tests. The respiration and heavy metal leaching increased linearly with the external organic matter addition. Based on the results, it was concluded that the external organic matter addition would negatively affect the quality of landfill cover drainage.},
  author       = {Ilyas, Aamir and Lovat, E and Persson, Km},
  issn         = {1096-3669},
  language     = {eng},
  number       = {12},
  pages        = {1241--1246},
  publisher    = {SAGE Publications Inc.},
  series       = {Waste Management & Research},
  title        = {Effects of substrate induced respiration on the stability of bottom ash in landfill cover environment.},
  url          = {http://dx.doi.org/10.1177/0734242X14555804},
  volume       = {32},
  year         = {2014},
}