Fouling in gravity driven Point-of-Use drinking water treatment systems

C. Chawla, A. Zwijnenburg, A.J.B. Kemperman, K. Nijmeijer

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Abstract

This paper describes fouling in simulated Point-of-Use (PoU) systems based on low pressure hollow fiber ultrafiltration membranes. Various operational configurations such as recirculation of feed, discontinuous vs. continuous filtration, and inside/out vs. outside/in were compared to study their effects on fouling and permeate production. Flux values stabilized around 2 L/m2 h for gravity driven (100 mbar) ultrafiltration. Intermittent operation resulted in lower overall hydraulic resistances compared to continuously operated systems. This was due to the low organic loading and relaxation of the fouling layer during periods of standstill. In most experiments the fouling layer mainly consisted of diatoms, inorganic particles and few microbial clusters. The PoU systems investigated can be operated for longer duration without the need for strong chemical cleaning.
Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalChemical Engineering Journal
Volume319
DOIs
Publication statusPublished - 24 Feb 2017

Fingerprint

Fouling
Water treatment
fouling
Potable water
Drinking Water
Gravitation
gravity
Chemical cleaning
Ultrafiltration
ultrafiltration
low pressure
diatom
Hydraulics
Fluxes
membrane
Membranes
hydraulics
drinking water treatment
experiment
Experiments

Keywords

  • Point-of-Use (PoU) systems
  • Ultrafiltration
  • Hollow fiber membranes
  • Biofouling
  • Intermittent operation

Cite this

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title = "Fouling in gravity driven Point-of-Use drinking water treatment systems",
abstract = "This paper describes fouling in simulated Point-of-Use (PoU) systems based on low pressure hollow fiber ultrafiltration membranes. Various operational configurations such as recirculation of feed, discontinuous vs. continuous filtration, and inside/out vs. outside/in were compared to study their effects on fouling and permeate production. Flux values stabilized around 2 L/m2 h for gravity driven (100 mbar) ultrafiltration. Intermittent operation resulted in lower overall hydraulic resistances compared to continuously operated systems. This was due to the low organic loading and relaxation of the fouling layer during periods of standstill. In most experiments the fouling layer mainly consisted of diatoms, inorganic particles and few microbial clusters. The PoU systems investigated can be operated for longer duration without the need for strong chemical cleaning.",
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Fouling in gravity driven Point-of-Use drinking water treatment systems. / Chawla, C.; Zwijnenburg, A.; Kemperman, A.J.B.; Nijmeijer, K.

In: Chemical Engineering Journal, Vol. 319, 24.02.2017, p. 89-97.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Fouling in gravity driven Point-of-Use drinking water treatment systems

AU - Chawla, C.

AU - Zwijnenburg, A.

AU - Kemperman, A.J.B.

AU - Nijmeijer, K.

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AB - This paper describes fouling in simulated Point-of-Use (PoU) systems based on low pressure hollow fiber ultrafiltration membranes. Various operational configurations such as recirculation of feed, discontinuous vs. continuous filtration, and inside/out vs. outside/in were compared to study their effects on fouling and permeate production. Flux values stabilized around 2 L/m2 h for gravity driven (100 mbar) ultrafiltration. Intermittent operation resulted in lower overall hydraulic resistances compared to continuously operated systems. This was due to the low organic loading and relaxation of the fouling layer during periods of standstill. In most experiments the fouling layer mainly consisted of diatoms, inorganic particles and few microbial clusters. The PoU systems investigated can be operated for longer duration without the need for strong chemical cleaning.

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