Controlling submicron particle deposition in a side-stream membrane bioreactor: A theoretical hydrodynamic modelling approach incorporating energy consumption

Tao Jiang*, Maria D. Kennedy, Chang Kyoo Yoo, Ingmar Nopens, Walter van der Meer, Harry Futselaar, Jan C. Schippers, Peter A. Vanrolleghem

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

Soluble microbial products (SMP) in the sludge water phase are regarded as the main foulant in MBRs. This study further developed an existing hydrodynamic model by incorporating energy consumption. The focus was on the cost-effectiveness of crossflow (CF) velocity in the control of submicron particle deposition. A sensitivity analysis showed that CF had the greatest impact on both particle backtransport and energy consumption. The other operational variables, i.e., dry solid content (DS), membrane tube dimension (D and L) and temperature (T) were generally less influential with respect to particle backtransport and energy consumption. Submicron particles were likely to deposit in side-stream MBRs, and the lowest backtransport velocity was found for particle radii around 0.1 μm and CF below 0.5 m/s. A particle size distribution (PSD) profile of MBR sludge showed a main peak at 40 μm and a second peak at 0.1-1 μm. The abundance of submicron particles at 2000 kDa was confirmed by a Liquid chromatography-Organic Carbon Detection (LC-OCD) analysis. The colloids responsible for the second peak in the PSD received high weighting factors (high filter cake formation potential) in the model optimization. In a lab-scale MBR, this critical crossflow velocity was between 0.75 and 1 m/s at 40 L/(m2 h).

Original languageEnglish
Pages (from-to)141-151
Number of pages11
JournalJournal of membrane science
Volume297
Issue number1-2
DOIs
Publication statusPublished - 5 Jul 2007
Externally publishedYes

Keywords

  • Fouling
  • Hydrodynamics
  • Membrane bioreactor
  • Modelling
  • Optimization

Fingerprint

Dive into the research topics of 'Controlling submicron particle deposition in a side-stream membrane bioreactor: A theoretical hydrodynamic modelling approach incorporating energy consumption'. Together they form a unique fingerprint.

Cite this