Temporal variation of foulant characterisation in membrane bio-reactor

Aryal, R., Legegue, J., Shon, H. K., Vigneswaran, S., Kandasamy, J. and Grasmick, A. (2009) Temporal variation of foulant characterisation in membrane bio-reactor. Desalination and Water Treatment, 6 1-3: 69-73. doi:10.5004/dwt.2009.647

Author Aryal, R.
Legegue, J.
Shon, H. K.
Vigneswaran, S.
Kandasamy, J.
Grasmick, A.
Title Temporal variation of foulant characterisation in membrane bio-reactor
Journal name Desalination and Water Treatment   Check publisher's open access policy
ISSN 1944-3986
Publication date 2009-06
Sub-type Article (original research)
DOI 10.5004/dwt.2009.647
Volume 6
Issue 1-3
Start page 69
End page 73
Total pages 5
Place of publication Hopkinton, MA, U.S.A.
Publisher Balaban Publishers
Language eng
Formatted abstract
Many studies have been performed to analyse the influence of compounds present in different fractions of the membrane foulants. The aim of this study was to reveal the changing chemistry of compounds present in membrane foulant with the evolution of time. Membrane fouling in a side stream membrane bioreactor (MBR) reactor was investigated. Constant flux filtration was employed in an MBR operation. Air bubbles were injected at 2 m3 h–1 m–2 for six different durations (2, 4, 6, 9, 15 and 20 days) of MBR operation. The foulant on the membrane surface was extracted using NaOH solution (5%) and analysed using fluorescent spectroscopy. The spectra showed the changing chemistry of foulant with the evolution of time. It showed low molecular weight substances such as amino acids and small aromatic proteins were dominant in the foulant at the beginning of the experiment but its concentration decreased with time. On the other hand BOD5 type substances concentration increased with time from the beginning of the experiment up to 9 days and there after decreased. The concentration of larger molecular weight soluble microbial by-products increased with evolution of time. Air bubbles at two aeration rate of 1 m3 h–1 m–2 and 2 m3 h–1 m–2 were also injected from the bottom of the membrane tanks to produce shear stresses on the membrane surface during 5 days of MBR operation to compare the effect of aeration in fouling propensity.
Keyword Membrane bioreactor
Soluble microbial by-products
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
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Created: Fri, 10 Feb 2012, 12:08:30 EST by Dr Rupak Aryal on behalf of Advanced Water Management Centre