Bacterial passage through microfiltration membranes in wastewater applications

被引：0

作者：

Sadr Ghayeni, S.B.

Beatson, P.J.

Fane, A.J.

Schneider, R.P.

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来源：

Journal of Membrane Science | / 153卷 / 01期

关键词：

Bacteria - Cell culture - Charge transfer - Disinfection - Mechanical permeability - Microfiltration - Pore size - Scanning electron microscopy - Sewage bacteriology - Vinyl resins - Wastewater treatment - Water filtration;

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摘要：

Two polyvinylidene microfiltration (MF) membranes with a nominal pore size of 0.22 μm were challenged with mixed microbial cultures present in Milli-QTM water and in secondary effluent, and with a Gram-negative model bacterium, SW8, to investigate bacterial passage. Total bacterial counts measured microscopically using the DNA fluorochrome DAPI revealed that the small bacteria in Milli-QTM water passed MF membranes totally. SW8 and bacteria from secondary effluent were mostly retained with log reduction values of 4 and 3.5, respectively. Transmembrane pressure did not influence the levels of bacterial passage significantly. Pore size effects were investigated with tracked-etched membranes with nominal pore sizes of 0.2, 0.1 and 0.05 μm.

引用

页码：71 / 82