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Biologically mediated phosphorus precipitation in wastewater treatment with microalgae

Larsdotter, K; la Cour Jansen, Jes LU and Dalhammar, G (2007) In Environmental Technology 28(9). p.953-960
Abstract
A lab-scale continuous microalgal culture was grown on sterile-filtered wastewater in order to clarify the phosphorus removing mechanisms in a microalgal treatment step that treats residual phosphorus from a hydroponic wastewater treatment pilot plant. The phosphorus assimilation was dependent on algal biomass production, whereas the chemical precipitation was dependent on phosphorus load, i.e. an increase in average precipitation rate with decreased hydraulic retention time was observed. The chemical precipitation was mainly a result of the increased pH, which was biologically mediated by the photosynthesising algae. The precipitate was composed of a calcium phosphate with magnesium included, magnesium hydroxide and calcite. A significant... (More)
A lab-scale continuous microalgal culture was grown on sterile-filtered wastewater in order to clarify the phosphorus removing mechanisms in a microalgal treatment step that treats residual phosphorus from a hydroponic wastewater treatment pilot plant. The phosphorus assimilation was dependent on algal biomass production, whereas the chemical precipitation was dependent on phosphorus load, i.e. an increase in average precipitation rate with decreased hydraulic retention time was observed. The chemical precipitation was mainly a result of the increased pH, which was biologically mediated by the photosynthesising algae. The precipitate was composed of a calcium phosphate with magnesium included, magnesium hydroxide and calcite. A significant nitrogen removal was also experienced, which implies that the microalgal wastewater treatment is appropriate both for phosphorus and nitrogen removal. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
precipitation, assimilation, phosphorus, microalgae, wastewater treatment
in
Environmental Technology
volume
28
issue
9
pages
953 - 960
publisher
Selper Ltd
external identifiers
  • wos:000250077400001
  • scopus:34648822765
ISSN
1479-487X
language
English
LU publication?
yes
id
b295ddfd-8d75-494f-8461-724878983fcc (old id 907844)
alternative location
http://www.ingentaconnect.com/content/selp/envt/2007/00000028/00000009/art00001
date added to LUP
2008-01-09 15:08:34
date last changed
2017-10-29 03:39:59
@article{b295ddfd-8d75-494f-8461-724878983fcc,
  abstract     = {A lab-scale continuous microalgal culture was grown on sterile-filtered wastewater in order to clarify the phosphorus removing mechanisms in a microalgal treatment step that treats residual phosphorus from a hydroponic wastewater treatment pilot plant. The phosphorus assimilation was dependent on algal biomass production, whereas the chemical precipitation was dependent on phosphorus load, i.e. an increase in average precipitation rate with decreased hydraulic retention time was observed. The chemical precipitation was mainly a result of the increased pH, which was biologically mediated by the photosynthesising algae. The precipitate was composed of a calcium phosphate with magnesium included, magnesium hydroxide and calcite. A significant nitrogen removal was also experienced, which implies that the microalgal wastewater treatment is appropriate both for phosphorus and nitrogen removal.},
  author       = {Larsdotter, K and la Cour Jansen, Jes and Dalhammar, G},
  issn         = {1479-487X},
  keyword      = {precipitation,assimilation,phosphorus,microalgae,wastewater treatment},
  language     = {eng},
  number       = {9},
  pages        = {953--960},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {Biologically mediated phosphorus precipitation in wastewater treatment with microalgae},
  volume       = {28},
  year         = {2007},
}