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Energy production from agricultural residues: high methane yields in pilot scale two-stage anaerobic digestion

Parawira, Wilson LU ; Read, John S; Mattiasson, Bo LU and Björnsson, Lovisa LU (2008) In Biomass & Bioenergy 32(1). p.44-50
Abstract
There is a large, unutilised energy potential in agricultural waste fractions. In this pilotscale

study, the efficiency of a simple two-stage anaerobic digestion process was

investigated for stabilisation and biomethanation of solid potato waste and sugar beet

leaves, both separately and in co-digestion. A good phase separation between hydrolysis/

acidification and methanogenesis was achieved, as indicated by the high carbon dioxide

production, high volatile fatty acid concentration and low pH in the acidogenic reactors.

Digestion of the individual substrates gave gross energy yields of 2.1–3.4 kWh/kg VS in the

form of methane. Co-digestion, however, gave up to 60% higher... (More)
There is a large, unutilised energy potential in agricultural waste fractions. In this pilotscale

study, the efficiency of a simple two-stage anaerobic digestion process was

investigated for stabilisation and biomethanation of solid potato waste and sugar beet

leaves, both separately and in co-digestion. A good phase separation between hydrolysis/

acidification and methanogenesis was achieved, as indicated by the high carbon dioxide

production, high volatile fatty acid concentration and low pH in the acidogenic reactors.

Digestion of the individual substrates gave gross energy yields of 2.1–3.4 kWh/kg VS in the

form of methane. Co-digestion, however, gave up to 60% higher methane yield, indicating

that co-digestion resulted in improved methane production due to the positive synergism

established in the digestion liquor. The integrity of the methane filters (MFs) was

maintained throughout the period of operation, producing biogas with 60–78% methane

content. A stable effluent pH showed that the methanogenic reactors had good ability to

withstand the variations in load and volatile fatty acid concentrations that occurred in the

two-stage process. The results of this pilot-scale study show that the two-stage anaerobic

digestion system is suitable for effective conversion of semi-solid agricultural residues as

potato waste and sugar beet leaves. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Anaerobic digestion Two-stage Pilot scale Potato Sugar beet leaves Co-digestion
in
Biomass & Bioenergy
volume
32
issue
1
pages
44 - 50
publisher
Elsevier
external identifiers
  • wos:000253276300007
  • scopus:37249021300
ISSN
1873-2909
DOI
10.1016/j.biombioe.2007.06.003
language
English
LU publication?
yes
id
10932ed0-95dc-4999-a4e9-e83b2e24354a (old id 817802)
date added to LUP
2008-01-08 14:15:19
date last changed
2017-10-22 03:45:18
@article{10932ed0-95dc-4999-a4e9-e83b2e24354a,
  abstract     = {There is a large, unutilised energy potential in agricultural waste fractions. In this pilotscale<br/><br>
study, the efficiency of a simple two-stage anaerobic digestion process was<br/><br>
investigated for stabilisation and biomethanation of solid potato waste and sugar beet<br/><br>
leaves, both separately and in co-digestion. A good phase separation between hydrolysis/<br/><br>
acidification and methanogenesis was achieved, as indicated by the high carbon dioxide<br/><br>
production, high volatile fatty acid concentration and low pH in the acidogenic reactors.<br/><br>
Digestion of the individual substrates gave gross energy yields of 2.1–3.4 kWh/kg VS in the<br/><br>
form of methane. Co-digestion, however, gave up to 60% higher methane yield, indicating<br/><br>
that co-digestion resulted in improved methane production due to the positive synergism<br/><br>
established in the digestion liquor. The integrity of the methane filters (MFs) was<br/><br>
maintained throughout the period of operation, producing biogas with 60–78% methane<br/><br>
content. A stable effluent pH showed that the methanogenic reactors had good ability to<br/><br>
withstand the variations in load and volatile fatty acid concentrations that occurred in the<br/><br>
two-stage process. The results of this pilot-scale study show that the two-stage anaerobic<br/><br>
digestion system is suitable for effective conversion of semi-solid agricultural residues as<br/><br>
potato waste and sugar beet leaves.},
  author       = {Parawira, Wilson and Read, John S and Mattiasson, Bo and Björnsson, Lovisa},
  issn         = {1873-2909},
  keyword      = {Anaerobic digestion
Two-stage
Pilot scale
Potato
Sugar beet leaves
Co-digestion},
  language     = {eng},
  number       = {1},
  pages        = {44--50},
  publisher    = {Elsevier},
  series       = {Biomass & Bioenergy},
  title        = {Energy production from agricultural residues: high methane yields in pilot scale two-stage anaerobic digestion},
  url          = {http://dx.doi.org/10.1016/j.biombioe.2007.06.003},
  volume       = {32},
  year         = {2008},
}