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Effects of support material on the pattern of volatile fatty acid accumulation at overload in anaerobic digestion of semi-solid waste

Björnsson, Lovisa LU ; Mattiasson, Bo LU and Henrysson, Tomas LU (1997) In Applied Microbiology and Biotechnology 47. p.640-644
Abstract
Anaerobic degradation of a semi-solid waste with a total solids content of 4% particulate matter, much of it insoluble, was investigated in four laboratory-scale reactors. Two of the reactors were equipped with different textile materials for immobilisation of microorganisms, while the other two were used as continuously-stirred-tank reactor references, A constant organic loading rate and hydraulic retention time were used in the start-up period; the hydraulic retention time was then decreased and the effects of this change were monitored. Volatile fatty acid (VFA) concentration and pH were chosen as indicators of the microbial status in the reactors. The reactors with support material showed a greater resistance to overload than did the... (More)
Anaerobic degradation of a semi-solid waste with a total solids content of 4% particulate matter, much of it insoluble, was investigated in four laboratory-scale reactors. Two of the reactors were equipped with different textile materials for immobilisation of microorganisms, while the other two were used as continuously-stirred-tank reactor references, A constant organic loading rate and hydraulic retention time were used in the start-up period; the hydraulic retention time was then decreased and the effects of this change were monitored. Volatile fatty acid (VFA) concentration and pH were chosen as indicators of the microbial status in the reactors. The reactors with support material showed a greater resistance to overload than did the continuously-stirred-tank reactors. This is in agreement with many studies undertaken on the anaerobic treatment of wastewater. However, no problems with clogging occurred, showing that a support material is also applicable in systems treating waste containing large amounts of insoluble, particulate matter. The pH was comparable to VFA for indicating an approaching process failure. However, the pattern of VFA accumulation was qualitatively different between the reactors with and without support material, Obviously the metabolic pattern of mixed cultures changes when the microorganisms are immobilised. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Microbiology and Biotechnology
volume
47
pages
640 - 644
publisher
Springer
external identifiers
  • scopus:0030849984
ISSN
1432-0614
DOI
10.1007/s002530050988
language
English
LU publication?
yes
id
ef1a6fca-0387-451b-9dc4-348f91448a1a (old id 4690092)
date added to LUP
2014-11-04 17:56:54
date last changed
2017-02-19 04:18:40
@article{ef1a6fca-0387-451b-9dc4-348f91448a1a,
  abstract     = {Anaerobic degradation of a semi-solid waste with a total solids content of 4% particulate matter, much of it insoluble, was investigated in four laboratory-scale reactors. Two of the reactors were equipped with different textile materials for immobilisation of microorganisms, while the other two were used as continuously-stirred-tank reactor references, A constant organic loading rate and hydraulic retention time were used in the start-up period; the hydraulic retention time was then decreased and the effects of this change were monitored. Volatile fatty acid (VFA) concentration and pH were chosen as indicators of the microbial status in the reactors. The reactors with support material showed a greater resistance to overload than did the continuously-stirred-tank reactors. This is in agreement with many studies undertaken on the anaerobic treatment of wastewater. However, no problems with clogging occurred, showing that a support material is also applicable in systems treating waste containing large amounts of insoluble, particulate matter. The pH was comparable to VFA for indicating an approaching process failure. However, the pattern of VFA accumulation was qualitatively different between the reactors with and without support material, Obviously the metabolic pattern of mixed cultures changes when the microorganisms are immobilised.},
  author       = {Björnsson, Lovisa and Mattiasson, Bo and Henrysson, Tomas},
  issn         = {1432-0614},
  language     = {eng},
  pages        = {640--644},
  publisher    = {Springer},
  series       = {Applied Microbiology and Biotechnology},
  title        = {Effects of support material on the pattern of volatile fatty acid accumulation at overload in anaerobic digestion of semi-solid waste},
  url          = {http://dx.doi.org/10.1007/s002530050988},
  volume       = {47},
  year         = {1997},
}