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Strength characteristics of aerobic granular sludge

Nor-Anuar, A.; Ujang, Z.; van Loosdrecht, M. C. M.; de Kreuk, M. K. and Olsson, Gustaf LU (2012) In Water Science and Technology 65(2). p.309-316
Abstract
Aerobic granular sludge has a number of advantages over conventional activated sludge flocs, such as cohesive and strong matrix, fast settling characteristic, high biomass retention and ability to withstand high organic loadings, all aspects leading towards a compact reactor system. Still there are very few studies on the strength of aerobic granules. A procedure that has been used previously for anaerobic granular sludge strength analysis was adapted and used in this study. A new coefficient was introduced, called a stability coefficient (S), to quantify the strength of the aerobic granules. Indicators were also developed based on the strength analysis results, in order to categorize aerobic granules into three levels of strength, i.e.... (More)
Aerobic granular sludge has a number of advantages over conventional activated sludge flocs, such as cohesive and strong matrix, fast settling characteristic, high biomass retention and ability to withstand high organic loadings, all aspects leading towards a compact reactor system. Still there are very few studies on the strength of aerobic granules. A procedure that has been used previously for anaerobic granular sludge strength analysis was adapted and used in this study. A new coefficient was introduced, called a stability coefficient (S), to quantify the strength of the aerobic granules. Indicators were also developed based on the strength analysis results, in order to categorize aerobic granules into three levels of strength, i.e. very strong (very stable), strong (stable) and not strong (not stable). The results indicated that aerobic granules grown on acetate were stronger (high density: >150 g T SSL(-1) and low S value: 5%) than granules developed on sewage as influent. A lower value of S indicates a higher stability of the granules. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
aerobic granular sludge, granule density, stability, strength
in
Water Science and Technology
volume
65
issue
2
pages
309 - 316
publisher
IWA Publishing
external identifiers
  • wos:000299324000016
  • scopus:84856306301
ISSN
0273-1223
DOI
10.2166/wst.2012.837
language
English
LU publication?
yes
id
27a4fa63-e63e-488d-b0e7-6ae913d2ef9b (old id 2355030)
date added to LUP
2012-02-24 09:29:01
date last changed
2017-10-01 04:29:21
@article{27a4fa63-e63e-488d-b0e7-6ae913d2ef9b,
  abstract     = {Aerobic granular sludge has a number of advantages over conventional activated sludge flocs, such as cohesive and strong matrix, fast settling characteristic, high biomass retention and ability to withstand high organic loadings, all aspects leading towards a compact reactor system. Still there are very few studies on the strength of aerobic granules. A procedure that has been used previously for anaerobic granular sludge strength analysis was adapted and used in this study. A new coefficient was introduced, called a stability coefficient (S), to quantify the strength of the aerobic granules. Indicators were also developed based on the strength analysis results, in order to categorize aerobic granules into three levels of strength, i.e. very strong (very stable), strong (stable) and not strong (not stable). The results indicated that aerobic granules grown on acetate were stronger (high density: >150 g T SSL(-1) and low S value: 5%) than granules developed on sewage as influent. A lower value of S indicates a higher stability of the granules.},
  author       = {Nor-Anuar, A. and Ujang, Z. and van Loosdrecht, M. C. M. and de Kreuk, M. K. and Olsson, Gustaf},
  issn         = {0273-1223},
  keyword      = {aerobic granular sludge,granule density,stability,strength},
  language     = {eng},
  number       = {2},
  pages        = {309--316},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Strength characteristics of aerobic granular sludge},
  url          = {http://dx.doi.org/10.2166/wst.2012.837},
  volume       = {65},
  year         = {2012},
}