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Promotion of nitrifiers through side-stream bioaugmentation : A full-scale study

Stenström, F. LU and La Cour Jansen, J. LU (2016) In Water Science and Technology 74(7). p.1736-1743
Abstract

Bioaugmentation of nitrifiers from a side-stream treatment is an efficient method for boosting the mainstream process at a wastewater treatment plant (WWTP). Although this technology has been known for several years, the number of full-scale applications for it is limited. For a WWTP approaching its critical nitrogen load capacity, the benefits are doubled if the introduced side-stream treatment for digester supernatant is combined with bioaugmentation. Not only is the nitrogen load to the mainstream process decreased by 10-25%, but the mainstream process is also boosted with nitrifiers, increasing the nitrifying capacity. In this full-scale study, the increment of the nitrification rate is examined in the mainstream process at... (More)

Bioaugmentation of nitrifiers from a side-stream treatment is an efficient method for boosting the mainstream process at a wastewater treatment plant (WWTP). Although this technology has been known for several years, the number of full-scale applications for it is limited. For a WWTP approaching its critical nitrogen load capacity, the benefits are doubled if the introduced side-stream treatment for digester supernatant is combined with bioaugmentation. Not only is the nitrogen load to the mainstream process decreased by 10-25%, but the mainstream process is also boosted with nitrifiers, increasing the nitrifying capacity. In this full-scale study, the increment of the nitrification rate is examined in the mainstream process at different temperatures and at different flow rates of returned activated sludge to the side-stream treatment. Our results show that the nitrification rate in the mainstream process was increased by 41% during the coldest period of the study, implying that the examined WWTP could treat considerably higher nitrogen loads if bioaugmentation were permanently installed.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bioaugmentation, Biological wastewater treatment, Digester supernatant, Inoculation, Sequencing batch reactor
in
Water Science and Technology
volume
74
issue
7
pages
8 pages
publisher
IWA Publishing
external identifiers
  • scopus:84992084141
  • wos:000386941900024
ISSN
0273-1223
DOI
10.2166/wst.2016.340
language
English
LU publication?
yes
id
d62ddd84-4e37-4965-bba2-81faf5ec1584
date added to LUP
2016-11-16 12:15:23
date last changed
2017-04-10 11:08:27
@article{d62ddd84-4e37-4965-bba2-81faf5ec1584,
  abstract     = {<p>Bioaugmentation of nitrifiers from a side-stream treatment is an efficient method for boosting the mainstream process at a wastewater treatment plant (WWTP). Although this technology has been known for several years, the number of full-scale applications for it is limited. For a WWTP approaching its critical nitrogen load capacity, the benefits are doubled if the introduced side-stream treatment for digester supernatant is combined with bioaugmentation. Not only is the nitrogen load to the mainstream process decreased by 10-25%, but the mainstream process is also boosted with nitrifiers, increasing the nitrifying capacity. In this full-scale study, the increment of the nitrification rate is examined in the mainstream process at different temperatures and at different flow rates of returned activated sludge to the side-stream treatment. Our results show that the nitrification rate in the mainstream process was increased by 41% during the coldest period of the study, implying that the examined WWTP could treat considerably higher nitrogen loads if bioaugmentation were permanently installed.</p>},
  author       = {Stenström, F. and La Cour Jansen, J.},
  issn         = {0273-1223},
  keyword      = {Bioaugmentation,Biological wastewater treatment,Digester supernatant,Inoculation,Sequencing batch reactor},
  language     = {eng},
  month        = {10},
  number       = {7},
  pages        = {1736--1743},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Promotion of nitrifiers through side-stream bioaugmentation : A full-scale study},
  url          = {http://dx.doi.org/10.2166/wst.2016.340},
  volume       = {74},
  year         = {2016},
}