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Aluminium recovery vs. hydrogen production as resource recovery options for fine MSWI bottom ash fraction

Biganzoli, Laura ; Ilyas, Aamir LU ; van Praagh, Martijn LU ; Persson, Kenneth M LU and Grosso, Mario (2013) In Waste Management: international journal of integrated waste management, science and technology 33(5). p.1174-1181
Abstract
Waste incineration bottom ash fine fraction contains a significant amount of aluminium, but previous works have shown that current recovery options based on standard on-step Eddy Current Separation (ECS) have limited efficiency. In this paper, we evaluated the improvement in the efficiency of ECS by using an additional step of crushing and sieving. The efficiency of metallic Al recovery was quantified by measuring hydrogen gas production. The ash samples were also tested for total aluminium content with X-ray fluorescence spectroscopy (XRF). As an alternative to material recovery, we also investigated the possibility to convert residual metallic Al into useful energy, promoting H-2 gas production by reacting metallic Al with water at high... (More)
Waste incineration bottom ash fine fraction contains a significant amount of aluminium, but previous works have shown that current recovery options based on standard on-step Eddy Current Separation (ECS) have limited efficiency. In this paper, we evaluated the improvement in the efficiency of ECS by using an additional step of crushing and sieving. The efficiency of metallic Al recovery was quantified by measuring hydrogen gas production. The ash samples were also tested for total aluminium content with X-ray fluorescence spectroscopy (XRF). As an alternative to material recovery, we also investigated the possibility to convert residual metallic Al into useful energy, promoting H-2 gas production by reacting metallic Al with water at high pH. The results show that the total aluminium concentration in the <4 mm bottom ash fraction is on average 8% of the weight of the dry ash, with less than 15% of it being present in the metallic form. Of this latter, only 21% can be potentially recovered with ECS combined with crushing and sieving stages and subsequently recycled. For hydrogen production, using 10 M NaOH at 1 L/S ratio results in the release of 6-111 of H-2 gas for each kilogram of fine dry ash, equivalent to an energy potential of 118 kJ. (C) 2013 Elsevier Ltd. All rights reserved. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bottom ash, Aluminium recovery, Hydrogen production
in
Waste Management: international journal of integrated waste management, science and technology
volume
33
issue
5
pages
1174 - 1181
publisher
Elsevier
external identifiers
  • wos:000319791200019
  • scopus:84877629444
  • pmid:23453355
ISSN
1879-2456
DOI
10.1016/j.wasman.2013.01.037
language
English
LU publication?
yes
id
78b95a96-e055-4afe-bc36-2fccab19645f (old id 3930409)
date added to LUP
2016-04-01 14:43:58
date last changed
2022-01-28 02:14:43
@article{78b95a96-e055-4afe-bc36-2fccab19645f,
  abstract     = {{Waste incineration bottom ash fine fraction contains a significant amount of aluminium, but previous works have shown that current recovery options based on standard on-step Eddy Current Separation (ECS) have limited efficiency. In this paper, we evaluated the improvement in the efficiency of ECS by using an additional step of crushing and sieving. The efficiency of metallic Al recovery was quantified by measuring hydrogen gas production. The ash samples were also tested for total aluminium content with X-ray fluorescence spectroscopy (XRF). As an alternative to material recovery, we also investigated the possibility to convert residual metallic Al into useful energy, promoting H-2 gas production by reacting metallic Al with water at high pH. The results show that the total aluminium concentration in the &lt;4 mm bottom ash fraction is on average 8% of the weight of the dry ash, with less than 15% of it being present in the metallic form. Of this latter, only 21% can be potentially recovered with ECS combined with crushing and sieving stages and subsequently recycled. For hydrogen production, using 10 M NaOH at 1 L/S ratio results in the release of 6-111 of H-2 gas for each kilogram of fine dry ash, equivalent to an energy potential of 118 kJ. (C) 2013 Elsevier Ltd. All rights reserved.}},
  author       = {{Biganzoli, Laura and Ilyas, Aamir and van Praagh, Martijn and Persson, Kenneth M and Grosso, Mario}},
  issn         = {{1879-2456}},
  keywords     = {{Bottom ash; Aluminium recovery; Hydrogen production}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{1174--1181}},
  publisher    = {{Elsevier}},
  series       = {{Waste Management: international journal of integrated waste management, science and technology}},
  title        = {{Aluminium recovery vs. hydrogen production as resource recovery options for fine MSWI bottom ash fraction}},
  url          = {{http://dx.doi.org/10.1016/j.wasman.2013.01.037}},
  doi          = {{10.1016/j.wasman.2013.01.037}},
  volume       = {{33}},
  year         = {{2013}},
}