Change in surface properties of Microthrix parvicella upon addition of polyaluminium chloride as characterized by atomic force microscopy.
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1540796
- author
- Hamit, Jildiz LU ; Eskilsson, Krister and Arnebrant, Thomas
- organization
- publishing date
- 2010
- 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
- pmid:20087804
- 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
- 2016-04-01 14:41:19
- date last changed
- 2022-04-22 04:40:48
@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}},
doi = {{10.1080/08927010903584060}},
volume = {{26}},
year = {{2010}},
}