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Evaluating the biogas potential of the dry fraction from pretreatment of food waste from households.

Murto, Marika LU ; Björnsson, Lovisa LU ; Rosqvist, Håkan and Bohn, Irene (2013) In Waste Management 33(5). p.1282-1289
Abstract
At the waste handling company NSR, Helsingborg, Sweden, the food waste fraction of source separated municipal solid waste is pretreated to obtain a liquid fraction, which is used for biogas production, and a dry fraction, which is at present incinerated. This pretreatment and separation is performed to remove impurities, however also some of the organic material is removed. The possibility of realising the methane potential of the dry fraction through batch-wise dry anaerobic digestion was investigated. The anaerobic digestion technique used was a two-stage process consisting of a static leach bed reactor and a methane reactor. Treatment of the dry fraction alone and in a mixture with structural material was tested to investigate the... (More)
At the waste handling company NSR, Helsingborg, Sweden, the food waste fraction of source separated municipal solid waste is pretreated to obtain a liquid fraction, which is used for biogas production, and a dry fraction, which is at present incinerated. This pretreatment and separation is performed to remove impurities, however also some of the organic material is removed. The possibility of realising the methane potential of the dry fraction through batch-wise dry anaerobic digestion was investigated. The anaerobic digestion technique used was a two-stage process consisting of a static leach bed reactor and a methane reactor. Treatment of the dry fraction alone and in a mixture with structural material was tested to investigate the effect on the porosity of the leach bed. A tracer experiment was carried out to investigate the liquid flow through the leach beds, and this method proved useful in demonstrating a more homogenous flow through the leach bed when structural material was added. Addition of structural material to the dry fraction was needed to achieve a functional digestion process. A methane yield of 98m(3)/ton was obtained from the dry fraction mixed with structural material after 76days of digestion. This was in the same range as obtained in the laboratory scale biochemical methane potential test, showing that it was possible to extract the organic content in the dry fraction in this type of dry digestion system for the production of methane. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Waste Management
volume
33
issue
5
pages
1282 - 1289
publisher
Elsevier
external identifiers
  • wos:000319791200030
  • pmid:23465311
  • scopus:84877586587
ISSN
1879-2456
DOI
10.1016/j.wasman.2013.01.034
language
English
LU publication?
yes
id
7710ead9-b66a-4637-b1e4-fd10c41b683e (old id 3628528)
date added to LUP
2013-04-11 17:03:24
date last changed
2019-02-20 03:26:47
@article{7710ead9-b66a-4637-b1e4-fd10c41b683e,
  abstract     = {At the waste handling company NSR, Helsingborg, Sweden, the food waste fraction of source separated municipal solid waste is pretreated to obtain a liquid fraction, which is used for biogas production, and a dry fraction, which is at present incinerated. This pretreatment and separation is performed to remove impurities, however also some of the organic material is removed. The possibility of realising the methane potential of the dry fraction through batch-wise dry anaerobic digestion was investigated. The anaerobic digestion technique used was a two-stage process consisting of a static leach bed reactor and a methane reactor. Treatment of the dry fraction alone and in a mixture with structural material was tested to investigate the effect on the porosity of the leach bed. A tracer experiment was carried out to investigate the liquid flow through the leach beds, and this method proved useful in demonstrating a more homogenous flow through the leach bed when structural material was added. Addition of structural material to the dry fraction was needed to achieve a functional digestion process. A methane yield of 98m(3)/ton was obtained from the dry fraction mixed with structural material after 76days of digestion. This was in the same range as obtained in the laboratory scale biochemical methane potential test, showing that it was possible to extract the organic content in the dry fraction in this type of dry digestion system for the production of methane.},
  author       = {Murto, Marika and Björnsson, Lovisa and Rosqvist, Håkan and Bohn, Irene},
  issn         = {1879-2456},
  language     = {eng},
  number       = {5},
  pages        = {1282--1289},
  publisher    = {Elsevier},
  series       = {Waste Management},
  title        = {Evaluating the biogas potential of the dry fraction from pretreatment of food waste from households.},
  url          = {http://dx.doi.org/10.1016/j.wasman.2013.01.034},
  volume       = {33},
  year         = {2013},
}