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Change in surface properties of Microthrix parvicella upon addition of polyaluminium chloride as characterized by atomic force microscopy.

Hamit, Jildiz LU ; Eskilsson, Krister and Arnebrant, Thomas (2010) In Biofouling 26(3). p.323-331
Abstract
The filamentous bacterium Microthrix parvicella causes severe separation and foaming problems at wastewater treatment plants (WWTPs). An effective control of the bacterium in activated sludge WWTPs can be accomplished by dosage with polyaluminium chloride (PAX-14). The purpose of this study was to investigate whether addition of PAX-14 affects surface properties such as the hydrophobicity of the bacterium and to study the exopolymers of M. parvicella that host surface-associated enzymes. To this end, force measurements by atomic force microscopy were carried out to measure the interactions between hydrophilic and hydrophobized tips and the bacterium surface. Addition of PAX-14 caused no changes in the hydrophobicity of the bacterium... (More)
The filamentous bacterium Microthrix parvicella causes severe separation and foaming problems at wastewater treatment plants (WWTPs). An effective control of the bacterium in activated sludge WWTPs can be accomplished by dosage with polyaluminium chloride (PAX-14). The purpose of this study was to investigate whether addition of PAX-14 affects surface properties such as the hydrophobicity of the bacterium and to study the exopolymers of M. parvicella that host surface-associated enzymes. To this end, force measurements by atomic force microscopy were carried out to measure the interactions between hydrophilic and hydrophobized tips and the bacterium surface. Addition of PAX-14 caused no changes in the hydrophobicity of the bacterium surface but the data indicate that it collapsed the polymeric layer likely due to electrostatic screening. It is concluded that the collapse of the polymeric layer may affect the transport of substrates (eg free fatty acids) to the bacterium and hence the competitiveness of M. parvicella compared to the other bacteria present in activated sludge. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biofouling
volume
26
issue
3
pages
323 - 331
publisher
Taylor & Francis
external identifiers
  • pmid:20087804
  • scopus:77950482414
ISSN
1029-2454
DOI
10.1080/08927010903584060
language
English
LU publication?
yes
id
4061ad35-fd11-413e-a057-86fe2862a1bf (old id 1540796)
date added to LUP
2010-02-03 13:53:43
date last changed
2018-05-29 09:47:42
@article{4061ad35-fd11-413e-a057-86fe2862a1bf,
  abstract     = {The filamentous bacterium Microthrix parvicella causes severe separation and foaming problems at wastewater treatment plants (WWTPs). An effective control of the bacterium in activated sludge WWTPs can be accomplished by dosage with polyaluminium chloride (PAX-14). The purpose of this study was to investigate whether addition of PAX-14 affects surface properties such as the hydrophobicity of the bacterium and to study the exopolymers of M. parvicella that host surface-associated enzymes. To this end, force measurements by atomic force microscopy were carried out to measure the interactions between hydrophilic and hydrophobized tips and the bacterium surface. Addition of PAX-14 caused no changes in the hydrophobicity of the bacterium surface but the data indicate that it collapsed the polymeric layer likely due to electrostatic screening. It is concluded that the collapse of the polymeric layer may affect the transport of substrates (eg free fatty acids) to the bacterium and hence the competitiveness of M. parvicella compared to the other bacteria present in activated sludge.},
  author       = {Hamit, Jildiz and Eskilsson, Krister and Arnebrant, Thomas},
  issn         = {1029-2454},
  language     = {eng},
  number       = {3},
  pages        = {323--331},
  publisher    = {Taylor & Francis},
  series       = {Biofouling},
  title        = {Change in surface properties of Microthrix parvicella upon addition of polyaluminium chloride as characterized by atomic force microscopy.},
  url          = {http://dx.doi.org/10.1080/08927010903584060},
  volume       = {26},
  year         = {2010},
}