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Operation for nitritation of sludge liquor in a full-scale SBR.

Gustavsson, D J I; Nyberg, U and la Cour Jansen, Jes LU (2008) In Water Science and Technology 58(2). p.439-444
Abstract
At Sjölunda WWTP, a full-scale SBR for treatment of mesophilic sludge digester liquor has been operated almost a year with stable nitrite accumulation. Only nitritation of the sludge liquor is needed since the oxidized ammonium is denitrified in the first anoxic zone of the high-loaded activated sludge in the main plant. The process strategy was to have an ammonium set-point to end the aeration, a low DO concentration and a low pH set-point. An increase of pH set-point from 6.8 to 7.2 increased loss of alkalinity in the effluent and increased sodium hydroxide dosing. An increase of DO set-point from 1.1 mg O(2) L(-1) to 1.3 mg O(2) L(-1) markedly increased ammonia reduction rates and only slightly increased nitrate production. Today, an... (More)
At Sjölunda WWTP, a full-scale SBR for treatment of mesophilic sludge digester liquor has been operated almost a year with stable nitrite accumulation. Only nitritation of the sludge liquor is needed since the oxidized ammonium is denitrified in the first anoxic zone of the high-loaded activated sludge in the main plant. The process strategy was to have an ammonium set-point to end the aeration, a low DO concentration and a low pH set-point. An increase of pH set-point from 6.8 to 7.2 increased loss of alkalinity in the effluent and increased sodium hydroxide dosing. An increase of DO set-point from 1.1 mg O(2) L(-1) to 1.3 mg O(2) L(-1) markedly increased ammonia reduction rates and only slightly increased nitrate production. Today, an introduction of denitritation in the SBR will be a more cost-effective treatment of sludge liquor at Sjölunda WWTP. However, the choice of operation with only nitritation or nitritation/denitritation in sludge liquor treatment should always include a consideration of chemical costs and treatment capacity of both main plant and side-stream plant. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
nitrite accumulation, sludge liquor, nitritation, full-scale
in
Water Science and Technology
volume
58
issue
2
pages
439 - 444
publisher
IWA Publishing
external identifiers
  • wos:000258485600025
  • pmid:18701798
  • scopus:52949142387
ISSN
0273-1223
DOI
10.2166/wst.2008.402
language
English
LU publication?
yes
id
0205dda4-19fd-48f8-9235-1ba9a5560486 (old id 1223237)
date added to LUP
2008-09-26 13:47:12
date last changed
2017-01-01 05:29:10
@article{0205dda4-19fd-48f8-9235-1ba9a5560486,
  abstract     = {At Sjölunda WWTP, a full-scale SBR for treatment of mesophilic sludge digester liquor has been operated almost a year with stable nitrite accumulation. Only nitritation of the sludge liquor is needed since the oxidized ammonium is denitrified in the first anoxic zone of the high-loaded activated sludge in the main plant. The process strategy was to have an ammonium set-point to end the aeration, a low DO concentration and a low pH set-point. An increase of pH set-point from 6.8 to 7.2 increased loss of alkalinity in the effluent and increased sodium hydroxide dosing. An increase of DO set-point from 1.1 mg O(2) L(-1) to 1.3 mg O(2) L(-1) markedly increased ammonia reduction rates and only slightly increased nitrate production. Today, an introduction of denitritation in the SBR will be a more cost-effective treatment of sludge liquor at Sjölunda WWTP. However, the choice of operation with only nitritation or nitritation/denitritation in sludge liquor treatment should always include a consideration of chemical costs and treatment capacity of both main plant and side-stream plant.},
  author       = {Gustavsson, D J I and Nyberg, U and la Cour Jansen, Jes},
  issn         = {0273-1223},
  keyword      = {nitrite accumulation,sludge liquor,nitritation,full-scale},
  language     = {eng},
  number       = {2},
  pages        = {439--444},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Operation for nitritation of sludge liquor in a full-scale SBR.},
  url          = {http://dx.doi.org/10.2166/wst.2008.402},
  volume       = {58},
  year         = {2008},
}