To provide the first step towards a microbial ecology-based understanding of irreversible membrane biofouling, four laboratory-scale membrane bioreactors (MBRs) were operated to investigate the identity of bacterial populations highly correlated with irreversible membrane biofouling. The conventional MBR was divided into two separate experimental units. Unit one consisted of four suspended-growth, activated sludge, sequencing batch bioreactors treating a synthetic paper mill wastewater. Unit two consisted of a microfiltration membrane cell. Amplified ribosomal deoxyribonucleic acid restriction analysis (ARDRA) was used to compare the predominant bacterial populations in samples of mixed liquor and irreversibly bound to the membrane surface. The results of ARDRA showed a significant difference between the planktonic and sessile bacterial communities suggesting that irreversible biofouling of microfiltration membranes may be more highly correlated to specific bacterial populations rather than the total, bulk concentration of biomass. A custom-built mini-flow cell and light microscopy were used to visualise the early formation of biofilms by two pure cultures (Escherichia coli and Acinetobacter calcoaceticus) on membrane surfaces. The results confirmed that A. calcoaceticus was able to enhance the initiation of biofilm formation on microfiltration membranes.
Skip Nav Destination
Article navigation
Research Article|
April 01 2007
An ecology-based analysis of irreversible biofouling in membrane bioreactors Available to Purchase
K. Zhang;
K. Zhang
*Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Search for other works by this author on:
H. Choi;
H. Choi
*Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Search for other works by this author on:
M. Wu;
M. Wu
*Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Search for other works by this author on:
G.A. Sorial;
G.A. Sorial
*Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Search for other works by this author on:
D. Dionysiou;
D. Dionysiou
*Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Search for other works by this author on:
D.B. Oerther
**Department of Civil and Environmental Engineering, and Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA
E-mail: [email protected]
Search for other works by this author on:
Water Sci Technol (2007) 55 (8-9): 395–402.
Citation
K. Zhang, H. Choi, M. Wu, G.A. Sorial, D. Dionysiou, D.B. Oerther; An ecology-based analysis of irreversible biofouling in membrane bioreactors. Water Sci Technol 1 April 2007; 55 (8-9): 395–402. doi: https://doi.org/10.2166/wst.2007.283
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00