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Improved utilization of fish waste by anaerobic digestion following omega-3 fatty acids extraction.

Ivo Achu, Nges LU ; Mbatia, Betty LU and Björnsson, Lovisa LU (2012) In Journal of Environmental Management 110. p.159-165
Abstract
Fish waste is a potentially valuable resource from which high-value products can be obtained. Anaerobic digestion of the original fish waste and the fish sludge remaining after enzymatic pre-treatment to extract fish oil and fish protein hydrolysate was evaluated regarding the potential for methane production. The results showed high biodegradability of both fish sludge and fish waste, giving specific methane yields of 742 and 828 m(3)CH(4)/tons VS added, respectively. However, chemical analysis showed high concentrations of light metals which, together with high fat and protein contents, could be inhibitory to methanogenic bacteria. The feasibility of co-digesting the fish sludge with a carbohydrate-rich residue from crop production was... (More)
Fish waste is a potentially valuable resource from which high-value products can be obtained. Anaerobic digestion of the original fish waste and the fish sludge remaining after enzymatic pre-treatment to extract fish oil and fish protein hydrolysate was evaluated regarding the potential for methane production. The results showed high biodegradability of both fish sludge and fish waste, giving specific methane yields of 742 and 828 m(3)CH(4)/tons VS added, respectively. However, chemical analysis showed high concentrations of light metals which, together with high fat and protein contents, could be inhibitory to methanogenic bacteria. The feasibility of co-digesting the fish sludge with a carbohydrate-rich residue from crop production was thus investigated, and a full-scale process outlined for converting odorous fish waste to useful products. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biogas, Salmon waste, Jerusalem artichoke
in
Journal of Environmental Management
volume
110
pages
159 - 165
publisher
Academic Press
external identifiers
  • wos:000309486700017
  • pmid:22784804
  • scopus:84863505867
ISSN
0301-4797
DOI
10.1016/j.jenvman.2012.06.011
language
English
LU publication?
yes
id
19ca0915-8155-48d9-9de7-f9346793543a (old id 2967254)
date added to LUP
2012-09-05 11:56:21
date last changed
2017-09-24 03:04:30
@article{19ca0915-8155-48d9-9de7-f9346793543a,
  abstract     = {Fish waste is a potentially valuable resource from which high-value products can be obtained. Anaerobic digestion of the original fish waste and the fish sludge remaining after enzymatic pre-treatment to extract fish oil and fish protein hydrolysate was evaluated regarding the potential for methane production. The results showed high biodegradability of both fish sludge and fish waste, giving specific methane yields of 742 and 828 m(3)CH(4)/tons VS added, respectively. However, chemical analysis showed high concentrations of light metals which, together with high fat and protein contents, could be inhibitory to methanogenic bacteria. The feasibility of co-digesting the fish sludge with a carbohydrate-rich residue from crop production was thus investigated, and a full-scale process outlined for converting odorous fish waste to useful products.},
  author       = {Ivo Achu, Nges and Mbatia, Betty and Björnsson, Lovisa},
  issn         = {0301-4797},
  keyword      = {Biogas,Salmon waste,Jerusalem artichoke},
  language     = {eng},
  pages        = {159--165},
  publisher    = {Academic Press},
  series       = {Journal of Environmental Management},
  title        = {Improved utilization of fish waste by anaerobic digestion following omega-3 fatty acids extraction.},
  url          = {http://dx.doi.org/10.1016/j.jenvman.2012.06.011},
  volume       = {110},
  year         = {2012},
}