Abstract：
:Membrane fouling mitigation was observed during the development of novel sponge membrane bioreactor coupled with fiber bundle anoxic bio-filter (AF-MBMBR). Soluble microbial product (SMP) was found to be positively correlated with membrane fouling. To further clarify the mechanism of fouling mitigation, the effects of bio-carriers (sponge and fiber bundles) on characteristics and fouling potential of SMP were investigated. Characterization of SMP implied that as a consequence of employing bio-carriers, tyrosine and tryptophan in SMP significantly decreased, instead relative proportions of humic and fulvic acids increased. Meanwhile, batch filtration tests demonstrated that fouling potential of SMP was significantly alleviated, flux decline caused by filtrating SMP decreased from 84.5% to 60.1%. Further analysis on foulants and filtrate revealed that proteins performed high adhesion propensity on membrane while humic and fulvic acids mainly can pass through the membrane; this finding could well explain the mitigation of SMP fouling potential induced by bio-carriers.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Li Z,Song W,Liu F,Ding Y,You H,Liu H,Qi P,Jin Cdoi
10.1016/j.biortech.2018.06.067subject
Has Abstractpub_date
2018-10-01 00:00:00pages
51-59eissn
0960-8524issn
1873-2976pii
S0960-8524(18)30846-0journal_volume
266pub_type
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