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Semi-continuous co-digestion of solid slaughterhouse waste, manure, and fruit and vegetable waste

Alvarez, Rene LU and Lidén, Gunnar LU (2008) In Renewable Energy 33(4). p.726-734
Abstract
The potential of semi-continuous mesophilic anaerobic digestion (AD) for the treatment of solid slaughterhouse waste, fruit-vegetable wastes, and manure in a co-digestion process has been experimentally evaluated. A study was made at laboratory scale using four 2 L reactors working semi-continuously at 35 degrees C. The effect of the organic loading rate (OLR) was initially examined (using equal proportion of the three components on a volatile solids, VS, basis). Anaerobic co-digestion with OLRs in the range 0.3-1.3 kg VS m(-3) d(-1) resulted in methane yields of 0.3 m(3) kg(-1) VS added, with a methane content in the biogas of 54-56%. However, at a further increased loading, the biogas production decreased and there was a reduction in the... (More)
The potential of semi-continuous mesophilic anaerobic digestion (AD) for the treatment of solid slaughterhouse waste, fruit-vegetable wastes, and manure in a co-digestion process has been experimentally evaluated. A study was made at laboratory scale using four 2 L reactors working semi-continuously at 35 degrees C. The effect of the organic loading rate (OLR) was initially examined (using equal proportion of the three components on a volatile solids, VS, basis). Anaerobic co-digestion with OLRs in the range 0.3-1.3 kg VS m(-3) d(-1) resulted in methane yields of 0.3 m(3) kg(-1) VS added, with a methane content in the biogas of 54-56%. However, at a further increased loading, the biogas production decreased and there was a reduction in the methane yield indicating organic overload or insufficient buffering capacity in the digester. In the second part of the investigation, co-digestion was studied in a mixture experiment using 10 different feed compositions. The digestion of mixed substrates was in all cases better than that of the pure substrates, with the exception of the mixture of equal amounts of (VS/VS) solid cattle-swine slaughterhouse waste (SCSSW) with fruit and vegetable waste (FVW). For all other mixtures, the steady-state biogas production for the mixture was in the range 1.1-1.6 L d(-1), with a methane content of 50-57% after 60 days of operation. The methane yields were in the range 0.27-0.35 m(3) kg(-1) VS added and VS reductions of more than 50% and up to 67% were obtained. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
vegetable waste, slaughterhouse waste, manure, co-digestion, anaerobic, biogas
in
Renewable Energy
volume
33
issue
4
pages
726 - 734
publisher
Elsevier
external identifiers
  • wos:000252997100021
  • scopus:38049031894
ISSN
0960-1481
DOI
10.1016/j.renene.2007.05.001
language
English
LU publication?
yes
id
2f872e32-1c26-43ef-8dc7-df7eae6bdc88 (old id 1197067)
date added to LUP
2008-09-10 14:11:27
date last changed
2017-10-01 03:55:38
@article{2f872e32-1c26-43ef-8dc7-df7eae6bdc88,
  abstract     = {The potential of semi-continuous mesophilic anaerobic digestion (AD) for the treatment of solid slaughterhouse waste, fruit-vegetable wastes, and manure in a co-digestion process has been experimentally evaluated. A study was made at laboratory scale using four 2 L reactors working semi-continuously at 35 degrees C. The effect of the organic loading rate (OLR) was initially examined (using equal proportion of the three components on a volatile solids, VS, basis). Anaerobic co-digestion with OLRs in the range 0.3-1.3 kg VS m(-3) d(-1) resulted in methane yields of 0.3 m(3) kg(-1) VS added, with a methane content in the biogas of 54-56%. However, at a further increased loading, the biogas production decreased and there was a reduction in the methane yield indicating organic overload or insufficient buffering capacity in the digester. In the second part of the investigation, co-digestion was studied in a mixture experiment using 10 different feed compositions. The digestion of mixed substrates was in all cases better than that of the pure substrates, with the exception of the mixture of equal amounts of (VS/VS) solid cattle-swine slaughterhouse waste (SCSSW) with fruit and vegetable waste (FVW). For all other mixtures, the steady-state biogas production for the mixture was in the range 1.1-1.6 L d(-1), with a methane content of 50-57% after 60 days of operation. The methane yields were in the range 0.27-0.35 m(3) kg(-1) VS added and VS reductions of more than 50% and up to 67% were obtained.},
  author       = {Alvarez, Rene and Lidén, Gunnar},
  issn         = {0960-1481},
  keyword      = {vegetable waste,slaughterhouse waste,manure,co-digestion,anaerobic,biogas},
  language     = {eng},
  number       = {4},
  pages        = {726--734},
  publisher    = {Elsevier},
  series       = {Renewable Energy},
  title        = {Semi-continuous co-digestion of solid slaughterhouse waste, manure, and fruit and vegetable waste},
  url          = {http://dx.doi.org/10.1016/j.renene.2007.05.001},
  volume       = {33},
  year         = {2008},
}