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Anaerobic digestion of lipid-rich waste - Effects of lipid concentration

Cirne, Dores LU ; Paloumet, X.; Björnsson, Lovisa LU ; Alves, M. M. and Mattiasson, Bo LU (2007) In Renewable Energy 32(6). p.965-975
Abstract
The influence of lipid concentration on hydrolysis and biomethanation of a lipid-rich (triolein) model waste was evaluated in batch. The effect of increasing the concentration of lipid from 5% to 47% (w/w), based on chemical oxygen demand (COD), was investigated. The methane recovery observed was above 93% for all tests. An initial lag phase of approximately 6-10 days was observed for all tests. The methane production rate observed was similar for tests with 5%, 10% and 18% lipid (w/w, COD basis). For higher amounts of lipid (31%, 40% and 47%), a stronger inhibition was observed. However, the process was able to recover from the inhibition. When the effect of addition of lipase on enzymatic hydrolysis of lipids was studied, the results... (More)
The influence of lipid concentration on hydrolysis and biomethanation of a lipid-rich (triolein) model waste was evaluated in batch. The effect of increasing the concentration of lipid from 5% to 47% (w/w), based on chemical oxygen demand (COD), was investigated. The methane recovery observed was above 93% for all tests. An initial lag phase of approximately 6-10 days was observed for all tests. The methane production rate observed was similar for tests with 5%, 10% and 18% lipid (w/w, COD basis). For higher amounts of lipid (31%, 40% and 47%), a stronger inhibition was observed. However, the process was able to recover from the inhibition. When the effect of addition of lipase on enzymatic hydrolysis of lipids was studied, the results showed that the higher the enzyme concentration, the more accentuated was the inhibition of methane production. The enzyme appears to enhance the hydrolysis but the intermediates produced caused inhibition of the later steps in the,degradation process. Since the volatile fatty acid (VFA) profiles presented similar trends for the different concentrations of lipid tested, the major obstacle to methane production was the long-chain fatty acids (LCFA) formation. (c) 2006 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
palmitate, inhibition, LCFA, hydrolysis, anaerobic digestion, lipid
in
Renewable Energy
volume
32
issue
6
pages
965 - 975
publisher
Elsevier
external identifiers
  • wos:000244494000006
  • scopus:33751420991
ISSN
0960-1481
DOI
10.1016/j.renene.2006.04.003
language
English
LU publication?
yes
id
d95dc689-83c4-4e96-9cc2-034038a11a35 (old id 672941)
date added to LUP
2007-12-10 10:17:37
date last changed
2017-11-05 03:43:19
@article{d95dc689-83c4-4e96-9cc2-034038a11a35,
  abstract     = {The influence of lipid concentration on hydrolysis and biomethanation of a lipid-rich (triolein) model waste was evaluated in batch. The effect of increasing the concentration of lipid from 5% to 47% (w/w), based on chemical oxygen demand (COD), was investigated. The methane recovery observed was above 93% for all tests. An initial lag phase of approximately 6-10 days was observed for all tests. The methane production rate observed was similar for tests with 5%, 10% and 18% lipid (w/w, COD basis). For higher amounts of lipid (31%, 40% and 47%), a stronger inhibition was observed. However, the process was able to recover from the inhibition. When the effect of addition of lipase on enzymatic hydrolysis of lipids was studied, the results showed that the higher the enzyme concentration, the more accentuated was the inhibition of methane production. The enzyme appears to enhance the hydrolysis but the intermediates produced caused inhibition of the later steps in the,degradation process. Since the volatile fatty acid (VFA) profiles presented similar trends for the different concentrations of lipid tested, the major obstacle to methane production was the long-chain fatty acids (LCFA) formation. (c) 2006 Elsevier Ltd. All rights reserved.},
  author       = {Cirne, Dores and Paloumet, X. and Björnsson, Lovisa and Alves, M. M. and Mattiasson, Bo},
  issn         = {0960-1481},
  keyword      = {palmitate,inhibition,LCFA,hydrolysis,anaerobic digestion,lipid},
  language     = {eng},
  number       = {6},
  pages        = {965--975},
  publisher    = {Elsevier},
  series       = {Renewable Energy},
  title        = {Anaerobic digestion of lipid-rich waste - Effects of lipid concentration},
  url          = {http://dx.doi.org/10.1016/j.renene.2006.04.003},
  volume       = {32},
  year         = {2007},
}