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Biologisk denitrifikation av dricksvatten - Biological denitrification of drinking water

Persson, N ; la Cour Jansen, Jes LU and Persson, Kenneth M LU (2006) In Vatten: tidskrift för vattenvård /Journal of Water Management and research 62(4). p.323-333
Abstract
A pilot-plant study, made to clarify whether biological denitrification is a possible and suitable method for

nitrate reduction of drinking water in Sweden is presented. The concentration of nitrate-nitrogen in un-treated

water was 10–15 mg/l. The reactor was a 1.2 m aluminium tube with a inner diameter of 0.19 m. 0.75 m

was filled with Filtralite®, expanded clay, through which the nitrate-contaminated water was forced to flow

upwards with a velocity of 0.5 m/h. The system was run with artificial nitrate-polluted potable water from the

three pumps during a week. The nitrate was then added to the water by using a solution of sodium nitrate. As

carbon-source, sodium acetate was used. The... (More)
A pilot-plant study, made to clarify whether biological denitrification is a possible and suitable method for

nitrate reduction of drinking water in Sweden is presented. The concentration of nitrate-nitrogen in un-treated

water was 10–15 mg/l. The reactor was a 1.2 m aluminium tube with a inner diameter of 0.19 m. 0.75 m

was filled with Filtralite®, expanded clay, through which the nitrate-contaminated water was forced to flow

upwards with a velocity of 0.5 m/h. The system was run with artificial nitrate-polluted potable water from the

three pumps during a week. The nitrate was then added to the water by using a solution of sodium nitrate. As

carbon-source, sodium acetate was used. The Hydraulic Retention Time (HRT) of the system was 5.9 h, of

which approximately 2.6 hours were within the bacterial support material. The C:N ratio was found to be below

1.5 and the system was very stable. Since the process will not work as long as oxygen is present, oxygen was

degassed, but the importance of trace oxygen amounts could not be decided, since it wasn’t possible to decrease

the oxygen to really low concentrations in the water prior inlet to the reactor. It was concluded that it is possible

to use biological denitrification for drinking water. Post-treatment in an aerated reactor will be needed to ensure

that no carbon or nitrite-nitrogen comes into the potable water. (Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Vatten: tidskrift för vattenvård /Journal of Water Management and research
volume
62
issue
4
pages
323 - 333
publisher
Föreningen Vatten
ISSN
0042-2886
language
Swedish
LU publication?
yes
id
bc588c1c-06d6-4c8a-b514-caab8e3167da (old id 3918257)
alternative location
http://www.tidskriftenvatten.se/article.asp?articleID=2150
date added to LUP
2016-04-01 17:05:19
date last changed
2018-11-21 20:46:33
@article{bc588c1c-06d6-4c8a-b514-caab8e3167da,
  abstract     = {A pilot-plant study, made to clarify whether biological denitrification is a possible and suitable method for<br/><br>
nitrate reduction of drinking water in Sweden is presented. The concentration of nitrate-nitrogen in un-treated<br/><br>
water was 10–15 mg/l. The reactor was a 1.2 m aluminium tube with a inner diameter of 0.19 m. 0.75 m<br/><br>
was filled with Filtralite®, expanded clay, through which the nitrate-contaminated water was forced to flow<br/><br>
upwards with a velocity of 0.5 m/h. The system was run with artificial nitrate-polluted potable water from the<br/><br>
three pumps during a week. The nitrate was then added to the water by using a solution of sodium nitrate. As<br/><br>
carbon-source, sodium acetate was used. The Hydraulic Retention Time (HRT) of the system was 5.9 h, of<br/><br>
which approximately 2.6 hours were within the bacterial support material. The C:N ratio was found to be below<br/><br>
1.5 and the system was very stable. Since the process will not work as long as oxygen is present, oxygen was<br/><br>
degassed, but the importance of trace oxygen amounts could not be decided, since it wasn’t possible to decrease<br/><br>
the oxygen to really low concentrations in the water prior inlet to the reactor. It was concluded that it is possible<br/><br>
to use biological denitrification for drinking water. Post-treatment in an aerated reactor will be needed to ensure<br/><br>
that no carbon or nitrite-nitrogen comes into the potable water.},
  author       = {Persson, N and la Cour Jansen, Jes and Persson, Kenneth M},
  issn         = {0042-2886},
  language     = {swe},
  number       = {4},
  pages        = {323--333},
  publisher    = {Föreningen Vatten},
  series       = {Vatten: tidskrift för vattenvård /Journal of Water Management and research},
  title        = {Biologisk denitrifikation av dricksvatten - Biological denitrification of drinking water},
  url          = {http://www.tidskriftenvatten.se/article.asp?articleID=2150},
  volume       = {62},
  year         = {2006},
}