TY - JOUR
T1 - Characterization of soluble microbial products and their fouling impacts in membrane bioreactors
AU - Jiang, Tao
AU - Kennedy, Maria Dolores
AU - Schepper, Veerle D.
AU - Nam, Seongnam
AU - Nopens, Ingmar
AU - Vanrolleghem, Peter A.
AU - Amy, Gary L.
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2010/9
Y1 - 2010/9
N2 - Membrane bioreactor (MBR) fouling is not only influenced by the soluble microbial products (SMP) concentration but by their characteristics. Experiments of separate producing biomass associated products (BAP) and utilization associated products (UAP) allowed the separation of BAP and UAP effects from sludge water (SW). Thus, filtration of individual SMP components and further characterization becomes possible. Unstirred cell filtration was used to study fouling mechanisms and liquid chromatography-organic carbon detection (LC-OCD) and fluorescence excitation-emission matrix (EEM) were used to characterize the foulant. Generally, the SMP exhibiting characteristics of higher molecular weight, greater hydrophilicity and a more reduced state showed a higher retention percentage. However, the higher retention does not always yield higher fouling effects. The UAP filtration showed the highest specific cake resistance and pore blocking resistance attributed to their higher percentage of low molecular weight molecules, although their retention percentage was lower than the SW and BAP filtration. The UAP produced in the cell proliferation phase appeared to have the highest fouling potential. © 2010 American Chemical Society.
AB - Membrane bioreactor (MBR) fouling is not only influenced by the soluble microbial products (SMP) concentration but by their characteristics. Experiments of separate producing biomass associated products (BAP) and utilization associated products (UAP) allowed the separation of BAP and UAP effects from sludge water (SW). Thus, filtration of individual SMP components and further characterization becomes possible. Unstirred cell filtration was used to study fouling mechanisms and liquid chromatography-organic carbon detection (LC-OCD) and fluorescence excitation-emission matrix (EEM) were used to characterize the foulant. Generally, the SMP exhibiting characteristics of higher molecular weight, greater hydrophilicity and a more reduced state showed a higher retention percentage. However, the higher retention does not always yield higher fouling effects. The UAP filtration showed the highest specific cake resistance and pore blocking resistance attributed to their higher percentage of low molecular weight molecules, although their retention percentage was lower than the SW and BAP filtration. The UAP produced in the cell proliferation phase appeared to have the highest fouling potential. © 2010 American Chemical Society.
UR - http://hdl.handle.net/10754/561517
UR - https://pubs.acs.org/doi/10.1021/es100442g
UR - http://www.scopus.com/inward/record.url?scp=77956152935&partnerID=8YFLogxK
U2 - 10.1021/es100442g
DO - 10.1021/es100442g
M3 - Article
C2 - 20704277
SN - 0013-936X
VL - 44
SP - 6642
EP - 6648
JO - Environmental Science & Technology
JF - Environmental Science & Technology
IS - 17
ER -