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Microsieving in primary treatment : Effect of chemical dosing

Väänänen, J. LU ; Cimbritz, M. LU and La Cour Jansen, J. LU (2016) In Water Science and Technology 74(2). p.438-447
Abstract

Primary and chemically enhanced primary wastewater treatment with microsieving (disc or drum filtration) was studied at the large pilot scale at seven municipal wastewater treatment plants in Europe. Without chemical dosing, the reduction of suspended solids (SS) was (on average) 50% (20-65%). By introducing chemically enhanced primary treatment and dosing with cationic polymer only, SS removal could be controlled and increased to >80%. A maximum SS removal of >90% was achieved with a chemical dosing of >0.007 mg polymer/mg influent SS and 20 mg Al3t/L or 30 mg Fe3t/L. When comparing sieve pore sizes of 30-40 μm with 100 μm, the effluent SS was comparable, indicating that the larger sieve pore size could... (More)

Primary and chemically enhanced primary wastewater treatment with microsieving (disc or drum filtration) was studied at the large pilot scale at seven municipal wastewater treatment plants in Europe. Without chemical dosing, the reduction of suspended solids (SS) was (on average) 50% (20-65%). By introducing chemically enhanced primary treatment and dosing with cationic polymer only, SS removal could be controlled and increased to >80%. A maximum SS removal of >90% was achieved with a chemical dosing of >0.007 mg polymer/mg influent SS and 20 mg Al3t/L or 30 mg Fe3t/L. When comparing sieve pore sizes of 30-40 μm with 100 μm, the effluent SS was comparable, indicating that the larger sieve pore size could be used due to the higher loading capacity for the solids. Phosphorus removal was adjusted with the coagulant dose, and a removal of 95-97% was achieved. Moreover, microsieving offers favourable conditions for automated dosing control due to the low retention time in the filter.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coagulation, Flocculation, Microsieving, Primary wastewater treatment
in
Water Science and Technology
volume
74
issue
2
pages
10 pages
publisher
IWA Publishing
external identifiers
  • scopus:84979222199
  • wos:000380765500018
ISSN
0273-1223
DOI
10.2166/wst.2016.223
language
English
LU publication?
yes
id
bcd20d42-a541-49d9-babf-de7483431ee6
date added to LUP
2017-01-17 09:07:34
date last changed
2017-10-22 05:25:07
@article{bcd20d42-a541-49d9-babf-de7483431ee6,
  abstract     = {<p>Primary and chemically enhanced primary wastewater treatment with microsieving (disc or drum filtration) was studied at the large pilot scale at seven municipal wastewater treatment plants in Europe. Without chemical dosing, the reduction of suspended solids (SS) was (on average) 50% (20-65%). By introducing chemically enhanced primary treatment and dosing with cationic polymer only, SS removal could be controlled and increased to &gt;80%. A maximum SS removal of &gt;90% was achieved with a chemical dosing of &gt;0.007 mg polymer/mg influent SS and 20 mg Al<sub>3</sub>t/L or 30 mg Fe<sub>3</sub>t/L. When comparing sieve pore sizes of 30-40 μm with 100 μm, the effluent SS was comparable, indicating that the larger sieve pore size could be used due to the higher loading capacity for the solids. Phosphorus removal was adjusted with the coagulant dose, and a removal of 95-97% was achieved. Moreover, microsieving offers favourable conditions for automated dosing control due to the low retention time in the filter.</p>},
  author       = {Väänänen, J. and Cimbritz, M. and La Cour Jansen, J.},
  issn         = {0273-1223},
  keyword      = {Coagulation,Flocculation,Microsieving,Primary wastewater treatment},
  language     = {eng},
  month        = {07},
  number       = {2},
  pages        = {438--447},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Microsieving in primary treatment : Effect of chemical dosing},
  url          = {http://dx.doi.org/10.2166/wst.2016.223},
  volume       = {74},
  year         = {2016},
}