Please use this identifier to cite or link to this item:
Title: Fouling cake layer in a submerged anaerobic membrane bioreactor treating saline wastewaters: curse or a blessing?
Authors: Stuckey, David C. 
Vyrides, Ioannis 
Keywords: Fouling
Issue Date: 2011
Publisher: IWA Publishing Online
Source: Water Science and Technology, 2011, Volume 63, Issue 12, Pages 2902-2908
Abstract: The treatment of inhibitory (saline) wastewaters is known to produce considerable amounts of soluble microbial products (SMPs), and this has been implicated in membrane fouling; the fate of these SMPs was of considerable interest in this work. This study also investigated the contribution of SMPs to membrane fouling of the; (a) cake layer/biofilm layer, (b) the compounds below the biofilm/ cake layer and strongly attached to the surface of the membrane, (c) the compounds in the inner pores of the membrane, and (d) the membrane. It was found that the cake/biofilm layer was the main reason for fouling of the membrane. Interestingly, the bacteria attached to the cake/biofilm layer showed higher biodegradation rates compared with the bacteria in suspension. Moreover, the bacteria attached to the cake layer showed higher amounts of attached extracellular polysaccharides (EPS) compared with the bacteria in suspension, possibly due to accumulation of the released EPS from suspended biomass in the cake/biofilm layer. Molecular weight (MW) analysis of the effluent and reactor bulk showed that the cake layer can retain a large fraction of the SMPs in the reactor and prevent them from being released into the effluent. Hence, while cake layers lead to lower fluxes in submerged anaerobic membrane bioreactors (SAMBRs), and hence higher costs, they can improve the quality of the reactor effluent.
ISSN: 02731223
DOI: 10.2166/wst.2011.461
Rights: © IWA Publishing 2011
Appears in Collections:Άρθρα/Articles

Show full item record

Citations 20

checked on Jun 10, 2017

Citations 10

checked on Aug 18, 2017

Page view(s) 50

Last Week
Last month
checked on Aug 19, 2017

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.